1 files changed, 4134 insertions, 0 deletions

diff --git a/vendor/github.com/mitjafelicijan/go-tree-sitter/query.c b/vendor/github.com/mitjafelicijan/go-tree-sitter/query.c
new file mode 100644
index 0000000..1b6e04b
--- /dev/null
+++ b/vendor/github.com/mitjafelicijan/go-tree-sitter/query.c
@@ -0,0 +1,4134 @@
+#include "api.h"
+#include "./alloc.h"
+#include "./array.h"
+#include "./language.h"
+#include "./point.h"
+#include "./tree_cursor.h"
+#include "./unicode.h"
+#include <wctype.h>
+
+// #define DEBUG_ANALYZE_QUERY
+// #define DEBUG_EXECUTE_QUERY
+
+#define MAX_STEP_CAPTURE_COUNT 3
+#define MAX_NEGATED_FIELD_COUNT 8
+#define MAX_STATE_PREDECESSOR_COUNT 256
+#define MAX_ANALYSIS_STATE_DEPTH 8
+#define MAX_ANALYSIS_ITERATION_COUNT 256
+
+/*
+ * Stream - A sequence of unicode characters derived from a UTF8 string.
+ * This struct is used in parsing queries from S-expressions.
+ */
+typedef struct {
+  const char *input;
+  const char *start;
+  const char *end;
+  int32_t next;
+  uint8_t next_size;
+} Stream;
+
+/*
+ * QueryStep - A step in the process of matching a query. Each node within
+ * a query S-expression corresponds to one of these steps. An entire pattern
+ * is represented as a sequence of these steps. The basic properties of a
+ * node are represented by these fields:
+ * - `symbol` - The grammar symbol to match. A zero value represents the
+ *    wildcard symbol, '_'.
+ * - `field` - The field name to match. A zero value means that a field name
+ *    was not specified.
+ * - `capture_ids` - An array of integers representing the names of captures
+ *    associated with this node in the pattern, terminated by a `NONE` value.
+ * - `depth` - The depth where this node occurs in the pattern. The root node
+ *    of the pattern has depth zero.
+ * - `negated_field_list_id` - An id representing a set of fields that must
+ *    not be present on a node matching this step.
+ *
+ * Steps have some additional fields in order to handle the `.` (or "anchor") operator,
+ * which forbids additional child nodes:
+ * - `is_immediate` - Indicates that the node matching this step cannot be preceded
+ *   by other sibling nodes that weren't specified in the pattern.
+ * - `is_last_child` - Indicates that the node matching this step cannot have any
+ *   subsequent named siblings.
+ *
+ * For simple patterns, steps are matched in sequential order. But in order to
+ * handle alternative/repeated/optional sub-patterns, query steps are not always
+ * structured as a linear sequence; they sometimes need to split and merge. This
+ * is done using the following fields:
+ *  - `alternative_index` - The index of a different query step that serves as
+ *    an alternative to this step. A `NONE` value represents no alternative.
+ *    When a query state reaches a step with an alternative index, the state
+ *    is duplicated, with one copy remaining at the original step, and one copy
+ *    moving to the alternative step. The alternative may have its own alternative
+ *    step, so this splitting is an iterative process.
+ * - `is_dead_end` - Indicates that this state cannot be passed directly, and
+ *    exists only in order to redirect to an alternative index, with no splitting.
+ * - `is_pass_through` - Indicates that state has no matching logic of its own,
+ *    and exists only to split a state. One copy of the state advances immediately
+ *    to the next step, and one moves to the alternative step.
+ * - `alternative_is_immediate` - Indicates that this step's alternative step
+ *    should be treated as if `is_immediate` is true.
+ *
+ * Steps also store some derived state that summarizes how they relate to other
+ * steps within the same pattern. This is used to optimize the matching process:
+ *  - `contains_captures` - Indicates that this step or one of its child steps
+ *     has a non-empty `capture_ids` list.
+ *  - `parent_pattern_guaranteed` - Indicates that if this step is reached, then
+ *     it and all of its subsequent sibling steps within the same parent pattern
+ *     are guaranteed to match.
+ *  - `root_pattern_guaranteed` - Similar to `parent_pattern_guaranteed`, but
+ *     for the entire top-level pattern. When iterating through a query's
+ *     captures using `ts_query_cursor_next_capture`, this field is used to
+ *     detect that a capture can safely be returned from a match that has not
+ *     even completed  yet.
+ */
+typedef struct {
+  TSSymbol symbol;
+  TSSymbol supertype_symbol;
+  TSFieldId field;
+  uint16_t capture_ids[MAX_STEP_CAPTURE_COUNT];
+  uint16_t depth;
+  uint16_t alternative_index;
+  uint16_t negated_field_list_id;
+  bool is_named: 1;
+  bool is_immediate: 1;
+  bool is_last_child: 1;
+  bool is_pass_through: 1;
+  bool is_dead_end: 1;
+  bool alternative_is_immediate: 1;
+  bool contains_captures: 1;
+  bool root_pattern_guaranteed: 1;
+  bool parent_pattern_guaranteed: 1;
+} QueryStep;
+
+/*
+ * Slice - A slice of an external array. Within a query, capture names,
+ * literal string values, and predicate step information are stored in three
+ * contiguous arrays. Individual captures, string values, and predicates are
+ * represented as slices of these three arrays.
+ */
+typedef struct {
+  uint32_t offset;
+  uint32_t length;
+} Slice;
+
+/*
+ * SymbolTable - a two-way mapping of strings to ids.
+ */
+typedef struct {
+  Array(char) characters;
+  Array(Slice) slices;
+} SymbolTable;
+
+/**
+ * CaptureQuantififers - a data structure holding the quantifiers of pattern captures.
+ */
+typedef Array(uint8_t) CaptureQuantifiers;
+
+/*
+ * PatternEntry - Information about the starting point for matching a particular
+ * pattern. These entries are stored in a 'pattern map' - a sorted array that
+ * makes it possible to efficiently lookup patterns based on the symbol for their
+ * first step. The entry consists of the following fields:
+ * - `pattern_index` - the index of the pattern within the query
+ * - `step_index` - the index of the pattern's first step in the shared `steps` array
+ * - `is_rooted` - whether or not the pattern has a single root node. This property
+ *   affects decisions about whether or not to start the pattern for nodes outside
+ *   of a QueryCursor's range restriction.
+ */
+typedef struct {
+  uint16_t step_index;
+  uint16_t pattern_index;
+  bool is_rooted;
+} PatternEntry;
+
+typedef struct {
+  Slice steps;
+  Slice predicate_steps;
+  uint32_t start_byte;
+  bool is_non_local;
+} QueryPattern;
+
+typedef struct {
+  uint32_t byte_offset;
+  uint16_t step_index;
+} StepOffset;
+
+/*
+ * QueryState - The state of an in-progress match of a particular pattern
+ * in a query. While executing, a `TSQueryCursor` must keep track of a number
+ * of possible in-progress matches. Each of those possible matches is
+ * represented as one of these states. Fields:
+ * - `id` - A numeric id that is exposed to the public API. This allows the
+ *    caller to remove a given match, preventing any more of its captures
+ *    from being returned.
+ * - `start_depth` - The depth in the tree where the first step of the state's
+ *    pattern was matched.
+ * - `pattern_index` - The pattern that the state is matching.
+ * - `consumed_capture_count` - The number of captures from this match that
+ *    have already been returned.
+ * - `capture_list_id` - A numeric id that can be used to retrieve the state's
+ *    list of captures from the `CaptureListPool`.
+ * - `seeking_immediate_match` - A flag that indicates that the state's next
+ *    step must be matched by the very next sibling. This is used when
+ *    processing repetitions.
+ * - `has_in_progress_alternatives` - A flag that indicates that there is are
+ *    other states that have the same captures as this state, but are at
+ *    different steps in their pattern. This means that in order to obey the
+ *    'longest-match' rule, this state should not be returned as a match until
+ *    it is clear that there can be no other alternative match with more captures.
+ */
+typedef struct {
+  uint32_t id;
+  uint32_t capture_list_id;
+  uint16_t start_depth;
+  uint16_t step_index;
+  uint16_t pattern_index;
+  uint16_t consumed_capture_count: 12;
+  bool seeking_immediate_match: 1;
+  bool has_in_progress_alternatives: 1;
+  bool dead: 1;
+  bool needs_parent: 1;
+} QueryState;
+
+typedef Array(TSQueryCapture) CaptureList;
+
+/*
+ * CaptureListPool - A collection of *lists* of captures. Each query state needs
+ * to maintain its own list of captures. To avoid repeated allocations, this struct
+ * maintains a fixed set of capture lists, and keeps track of which ones are
+ * currently in use by a query state.
+ */
+typedef struct {
+  Array(CaptureList) list;
+  CaptureList empty_list;
+  // The maximum number of capture lists that we are allowed to allocate. We
+  // never allow `list` to allocate more entries than this, dropping pending
+  // matches if needed to stay under the limit.
+  uint32_t max_capture_list_count;
+  // The number of capture lists allocated in `list` that are not currently in
+  // use. We reuse those existing-but-unused capture lists before trying to
+  // allocate any new ones. We use an invalid value (UINT32_MAX) for a capture
+  // list's length to indicate that it's not in use.
+  uint32_t free_capture_list_count;
+} CaptureListPool;
+
+/*
+ * AnalysisState - The state needed for walking the parse table when analyzing
+ * a query pattern, to determine at which steps the pattern might fail to match.
+ */
+typedef struct {
+  TSStateId parse_state;
+  TSSymbol parent_symbol;
+  uint16_t child_index;
+  TSFieldId field_id: 15;
+  bool done: 1;
+} AnalysisStateEntry;
+
+typedef struct {
+  AnalysisStateEntry stack[MAX_ANALYSIS_STATE_DEPTH];
+  uint16_t depth;
+  uint16_t step_index;
+  TSSymbol root_symbol;
+} AnalysisState;
+
+typedef Array(AnalysisState *) AnalysisStateSet;
+
+typedef struct {
+  AnalysisStateSet states;
+  AnalysisStateSet next_states;
+  AnalysisStateSet deeper_states;
+  AnalysisStateSet state_pool;
+  Array(uint16_t) final_step_indices;
+  Array(TSSymbol) finished_parent_symbols;
+  bool did_abort;
+} QueryAnalysis;
+
+/*
+ * AnalysisSubgraph - A subset of the states in the parse table that are used
+ * in constructing nodes with a certain symbol. Each state is accompanied by
+ * some information about the possible node that could be produced in
+ * downstream states.
+ */
+typedef struct {
+  TSStateId state;
+  uint16_t production_id;
+  uint8_t child_index: 7;
+  bool done: 1;
+} AnalysisSubgraphNode;
+
+typedef struct {
+  TSSymbol symbol;
+  Array(TSStateId) start_states;
+  Array(AnalysisSubgraphNode) nodes;
+} AnalysisSubgraph;
+
+typedef Array(AnalysisSubgraph) AnalysisSubgraphArray;
+
+/*
+ * StatePredecessorMap - A map that stores the predecessors of each parse state.
+ * This is used during query analysis to determine which parse states can lead
+ * to which reduce actions.
+ */
+typedef struct {
+  TSStateId *contents;
+} StatePredecessorMap;
+
+/*
+ * TSQuery - A tree query, compiled from a string of S-expressions. The query
+ * itself is immutable. The mutable state used in the process of executing the
+ * query is stored in a `TSQueryCursor`.
+ */
+struct TSQuery {
+  SymbolTable captures;
+  SymbolTable predicate_values;
+  Array(CaptureQuantifiers) capture_quantifiers;
+  Array(QueryStep) steps;
+  Array(PatternEntry) pattern_map;
+  Array(TSQueryPredicateStep) predicate_steps;
+  Array(QueryPattern) patterns;
+  Array(StepOffset) step_offsets;
+  Array(TSFieldId) negated_fields;
+  Array(char) string_buffer;
+  Array(TSSymbol) repeat_symbols_with_rootless_patterns;
+  const TSLanguage *language;
+  uint16_t wildcard_root_pattern_count;
+};
+
+/*
+ * TSQueryCursor - A stateful struct used to execute a query on a tree.
+ */
+struct TSQueryCursor {
+  const TSQuery *query;
+  TSTreeCursor cursor;
+  Array(QueryState) states;
+  Array(QueryState) finished_states;
+  CaptureListPool capture_list_pool;
+  uint32_t depth;
+  uint32_t max_start_depth;
+  uint32_t start_byte;
+  uint32_t end_byte;
+  TSPoint start_point;
+  TSPoint end_point;
+  uint32_t next_state_id;
+  bool on_visible_node;
+  bool ascending;
+  bool halted;
+  bool did_exceed_match_limit;
+};
+
+static const TSQueryError PARENT_DONE = -1;
+static const uint16_t PATTERN_DONE_MARKER = UINT16_MAX;
+static const uint16_t NONE = UINT16_MAX;
+static const TSSymbol WILDCARD_SYMBOL = 0;
+
+/**********
+ * Stream
+ **********/
+
+// Advance to the next unicode code point in the stream.
+static bool stream_advance(Stream *self) {
+  self->input += self->next_size;
+  if (self->input < self->end) {
+    uint32_t size = ts_decode_utf8(
+      (const uint8_t *)self->input,
+      (uint32_t)(self->end - self->input),
+      &self->next
+    );
+    if (size > 0) {
+      self->next_size = size;
+      return true;
+    }
+  } else {
+    self->next_size = 0;
+    self->next = '\0';
+  }
+  return false;
+}
+
+// Reset the stream to the given input position, represented as a pointer
+// into the input string.
+static void stream_reset(Stream *self, const char *input) {
+  self->input = input;
+  self->next_size = 0;
+  stream_advance(self);
+}
+
+static Stream stream_new(const char *string, uint32_t length) {
+  Stream self = {
+    .next = 0,
+    .input = string,
+    .start = string,
+    .end = string + length,
+  };
+  stream_advance(&self);
+  return self;
+}
+
+static void stream_skip_whitespace(Stream *self) {
+  for (;;) {
+    if (iswspace(self->next)) {
+      stream_advance(self);
+    } else if (self->next == ';') {
+      // skip over comments
+      stream_advance(self);
+      while (self->next && self->next != '\n') {
+        if (!stream_advance(self)) break;
+      }
+    } else {
+      break;
+    }
+  }
+}
+
+static bool stream_is_ident_start(Stream *self) {
+  return iswalnum(self->next) || self->next == '_' || self->next == '-';
+}
+
+static void stream_scan_identifier(Stream *stream) {
+  do {
+    stream_advance(stream);
+  } while (
+    iswalnum(stream->next) ||
+    stream->next == '_' ||
+    stream->next == '-' ||
+    stream->next == '.' ||
+    stream->next == '?' ||
+    stream->next == '!'
+  );
+}
+
+static uint32_t stream_offset(Stream *self) {
+  return (uint32_t)(self->input - self->start);
+}
+
+/******************
+ * CaptureListPool
+ ******************/
+
+static CaptureListPool capture_list_pool_new(void) {
+  return (CaptureListPool) {
+    .list = array_new(),
+    .empty_list = array_new(),
+    .max_capture_list_count = UINT32_MAX,
+    .free_capture_list_count = 0,
+  };
+}
+
+static void capture_list_pool_reset(CaptureListPool *self) {
+  for (uint16_t i = 0; i < (uint16_t)self->list.size; i++) {
+    // This invalid size means that the list is not in use.
+    self->list.contents[i].size = UINT32_MAX;
+  }
+  self->free_capture_list_count = self->list.size;
+}
+
+static void capture_list_pool_delete(CaptureListPool *self) {
+  for (uint16_t i = 0; i < (uint16_t)self->list.size; i++) {
+    array_delete(&self->list.contents[i]);
+  }
+  array_delete(&self->list);
+}
+
+static const CaptureList *capture_list_pool_get(const CaptureListPool *self, uint16_t id) {
+  if (id >= self->list.size) return &self->empty_list;
+  return &self->list.contents[id];
+}
+
+static CaptureList *capture_list_pool_get_mut(CaptureListPool *self, uint16_t id) {
+  assert(id < self->list.size);
+  return &self->list.contents[id];
+}
+
+static bool capture_list_pool_is_empty(const CaptureListPool *self) {
+  // The capture list pool is empty if all allocated lists are in use, and we
+  // have reached the maximum allowed number of allocated lists.
+  return self->free_capture_list_count == 0 && self->list.size >= self->max_capture_list_count;
+}
+
+static uint16_t capture_list_pool_acquire(CaptureListPool *self) {
+  // First see if any already allocated capture list is currently unused.
+  if (self->free_capture_list_count > 0) {
+    for (uint16_t i = 0; i < (uint16_t)self->list.size; i++) {
+      if (self->list.contents[i].size == UINT32_MAX) {
+        array_clear(&self->list.contents[i]);
+        self->free_capture_list_count--;
+        return i;
+      }
+    }
+  }
+
+  // Otherwise allocate and initialize a new capture list, as long as that
+  // doesn't put us over the requested maximum.
+  uint32_t i = self->list.size;
+  if (i >= self->max_capture_list_count) {
+    return NONE;
+  }
+  CaptureList list;
+  array_init(&list);
+  array_push(&self->list, list);
+  return i;
+}
+
+static void capture_list_pool_release(CaptureListPool *self, uint16_t id) {
+  if (id >= self->list.size) return;
+  self->list.contents[id].size = UINT32_MAX;
+  self->free_capture_list_count++;
+}
+
+/**************
+ * Quantifiers
+ **************/
+
+static TSQuantifier quantifier_mul(
+  TSQuantifier left,
+  TSQuantifier right
+) {
+  switch (left)
+  {
+    case TSQuantifierZero:
+      return TSQuantifierZero;
+    case TSQuantifierZeroOrOne:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZero;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierOne:
+          return TSQuantifierZeroOrOne;
+        case TSQuantifierZeroOrMore:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierZeroOrMore;
+      };
+      break;
+    case TSQuantifierZeroOrMore:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZero;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierZeroOrMore;
+      };
+      break;
+    case TSQuantifierOne:
+      return right;
+    case TSQuantifierOneOrMore:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZero;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+  }
+  return TSQuantifierZero; // to make compiler happy, but all cases should be covered above!
+}
+
+static TSQuantifier quantifier_join(
+  TSQuantifier left,
+  TSQuantifier right
+) {
+  switch (left)
+  {
+    case TSQuantifierZero:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZero;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierOne:
+          return TSQuantifierZeroOrOne;
+        case TSQuantifierZeroOrMore:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierZeroOrMore;
+      };
+      break;
+    case TSQuantifierZeroOrOne:
+      switch (right) {
+        case TSQuantifierZero:
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierOne:
+          return TSQuantifierZeroOrOne;
+          break;
+        case TSQuantifierZeroOrMore:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierZeroOrMore;
+          break;
+      };
+      break;
+    case TSQuantifierZeroOrMore:
+      return TSQuantifierZeroOrMore;
+    case TSQuantifierOne:
+      switch (right) {
+        case TSQuantifierZero:
+        case TSQuantifierZeroOrOne:
+          return TSQuantifierZeroOrOne;
+        case TSQuantifierZeroOrMore:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierOne:
+          return TSQuantifierOne;
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+    case TSQuantifierOneOrMore:
+      switch (right) {
+        case TSQuantifierZero:
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+  }
+  return TSQuantifierZero; // to make compiler happy, but all cases should be covered above!
+}
+
+static TSQuantifier quantifier_add(
+  TSQuantifier left,
+  TSQuantifier right
+) {
+  switch (left)
+  {
+    case TSQuantifierZero:
+      return right;
+    case TSQuantifierZeroOrOne:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZeroOrOne;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+    case TSQuantifierZeroOrMore:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+          return TSQuantifierZeroOrMore;
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+    case TSQuantifierOne:
+      switch (right) {
+        case TSQuantifierZero:
+          return TSQuantifierOne;
+        case TSQuantifierZeroOrOne:
+        case TSQuantifierZeroOrMore:
+        case TSQuantifierOne:
+        case TSQuantifierOneOrMore:
+          return TSQuantifierOneOrMore;
+      };
+      break;
+    case TSQuantifierOneOrMore:
+      return TSQuantifierOneOrMore;
+  }
+  return TSQuantifierZero; // to make compiler happy, but all cases should be covered above!
+}
+
+// Create new capture quantifiers structure
+static CaptureQuantifiers capture_quantifiers_new(void) {
+  return (CaptureQuantifiers) array_new();
+}
+
+// Delete capture quantifiers structure
+static void capture_quantifiers_delete(
+  CaptureQuantifiers *self
+) {
+  array_delete(self);
+}
+
+// Clear capture quantifiers structure
+static void capture_quantifiers_clear(
+  CaptureQuantifiers *self
+) {
+  array_clear(self);
+}
+
+// Replace capture quantifiers with the given quantifiers
+static void capture_quantifiers_replace(
+  CaptureQuantifiers *self,
+  CaptureQuantifiers *quantifiers
+) {
+  array_clear(self);
+  array_push_all(self, quantifiers);
+}
+
+// Return capture quantifier for the given capture id
+static TSQuantifier capture_quantifier_for_id(
+  const CaptureQuantifiers *self,
+  uint16_t id
+) {
+  return (self->size <= id) ? TSQuantifierZero : (TSQuantifier) *array_get(self, id);
+}
+
+// Add the given quantifier to the current value for id
+static void capture_quantifiers_add_for_id(
+  CaptureQuantifiers *self,
+  uint16_t id,
+  TSQuantifier quantifier
+) {
+  if (self->size <= id) {
+    array_grow_by(self, id + 1 - self->size);
+  }
+  uint8_t *own_quantifier = array_get(self, id);
+  *own_quantifier = (uint8_t) quantifier_add((TSQuantifier) *own_quantifier, quantifier);
+}
+
+// Point-wise add the given quantifiers to the current values
+static void capture_quantifiers_add_all(
+  CaptureQuantifiers *self,
+  CaptureQuantifiers *quantifiers
+) {
+  if (self->size < quantifiers->size) {
+    array_grow_by(self, quantifiers->size - self->size);
+  }
+  for (uint16_t id = 0; id < (uint16_t)quantifiers->size; id++) {
+    uint8_t *quantifier = array_get(quantifiers, id);
+    uint8_t *own_quantifier = array_get(self, id);
+    *own_quantifier = (uint8_t) quantifier_add((TSQuantifier) *own_quantifier, (TSQuantifier) *quantifier);
+  }
+}
+
+// Join the given quantifier with the current values
+static void capture_quantifiers_mul(
+  CaptureQuantifiers *self,
+  TSQuantifier quantifier
+) {
+  for (uint16_t id = 0; id < (uint16_t)self->size; id++) {
+    uint8_t *own_quantifier = array_get(self, id);
+    *own_quantifier = (uint8_t) quantifier_mul((TSQuantifier) *own_quantifier, quantifier);
+  }
+}
+
+// Point-wise join the quantifiers from a list of alternatives with the current values
+static void capture_quantifiers_join_all(
+  CaptureQuantifiers *self,
+  CaptureQuantifiers *quantifiers
+) {
+  if (self->size < quantifiers->size) {
+    array_grow_by(self, quantifiers->size - self->size);
+  }
+  for (uint32_t id = 0; id < quantifiers->size; id++) {
+    uint8_t *quantifier = array_get(quantifiers, id);
+    uint8_t *own_quantifier = array_get(self, id);
+    *own_quantifier = (uint8_t) quantifier_join((TSQuantifier) *own_quantifier, (TSQuantifier) *quantifier);
+  }
+  for (uint32_t id = quantifiers->size; id < self->size; id++) {
+    uint8_t *own_quantifier = array_get(self, id);
+    *own_quantifier = (uint8_t) quantifier_join((TSQuantifier) *own_quantifier, TSQuantifierZero);
+  }
+}
+
+/**************
+ * SymbolTable
+ **************/
+
+static SymbolTable symbol_table_new(void) {
+  return (SymbolTable) {
+    .characters = array_new(),
+    .slices = array_new(),
+  };
+}
+
+static void symbol_table_delete(SymbolTable *self) {
+  array_delete(&self->characters);
+  array_delete(&self->slices);
+}
+
+static int symbol_table_id_for_name(
+  const SymbolTable *self,
+  const char *name,
+  uint32_t length
+) {
+  for (unsigned i = 0; i < self->slices.size; i++) {
+    Slice slice = self->slices.contents[i];
+    if (
+      slice.length == length &&
+      !strncmp(&self->characters.contents[slice.offset], name, length)
+    ) return i;
+  }
+  return -1;
+}
+
+static const char *symbol_table_name_for_id(
+  const SymbolTable *self,
+  uint16_t id,
+  uint32_t *length
+) {
+  Slice slice = self->slices.contents[id];
+  *length = slice.length;
+  return &self->characters.contents[slice.offset];
+}
+
+static uint16_t symbol_table_insert_name(
+  SymbolTable *self,
+  const char *name,
+  uint32_t length
+) {
+  int id = symbol_table_id_for_name(self, name, length);
+  if (id >= 0) return (uint16_t)id;
+  Slice slice = {
+    .offset = self->characters.size,
+    .length = length,
+  };
+  array_grow_by(&self->characters, length + 1);
+  memcpy(&self->characters.contents[slice.offset], name, length);
+  self->characters.contents[self->characters.size - 1] = 0;
+  array_push(&self->slices, slice);
+  return self->slices.size - 1;
+}
+
+/************
+ * QueryStep
+ ************/
+
+static QueryStep query_step__new(
+  TSSymbol symbol,
+  uint16_t depth,
+  bool is_immediate
+) {
+  QueryStep step = {
+    .symbol = symbol,
+    .depth = depth,
+    .field = 0,
+    .alternative_index = NONE,
+    .negated_field_list_id = 0,
+    .contains_captures = false,
+    .is_last_child = false,
+    .is_named = false,
+    .is_pass_through = false,
+    .is_dead_end = false,
+    .root_pattern_guaranteed = false,
+    .is_immediate = is_immediate,
+    .alternative_is_immediate = false,
+  };
+  for (unsigned i = 0; i < MAX_STEP_CAPTURE_COUNT; i++) {
+    step.capture_ids[i] = NONE;
+  }
+  return step;
+}
+
+static void query_step__add_capture(QueryStep *self, uint16_t capture_id) {
+  for (unsigned i = 0; i < MAX_STEP_CAPTURE_COUNT; i++) {
+    if (self->capture_ids[i] == NONE) {
+      self->capture_ids[i] = capture_id;
+      break;
+    }
+  }
+}
+
+static void query_step__remove_capture(QueryStep *self, uint16_t capture_id) {
+  for (unsigned i = 0; i < MAX_STEP_CAPTURE_COUNT; i++) {
+    if (self->capture_ids[i] == capture_id) {
+      self->capture_ids[i] = NONE;
+      while (i + 1 < MAX_STEP_CAPTURE_COUNT) {
+        if (self->capture_ids[i + 1] == NONE) break;
+        self->capture_ids[i] = self->capture_ids[i + 1];
+        self->capture_ids[i + 1] = NONE;
+        i++;
+      }
+      break;
+    }
+  }
+}
+
+/**********************
+ * StatePredecessorMap
+ **********************/
+
+static inline StatePredecessorMap state_predecessor_map_new(
+  const TSLanguage *language
+) {
+  return (StatePredecessorMap) {
+    .contents = ts_calloc(
+      (size_t)language->state_count * (MAX_STATE_PREDECESSOR_COUNT + 1),
+      sizeof(TSStateId)
+    ),
+  };
+}
+
+static inline void state_predecessor_map_delete(StatePredecessorMap *self) {
+  ts_free(self->contents);
+}
+
+static inline void state_predecessor_map_add(
+  StatePredecessorMap *self,
+  TSStateId state,
+  TSStateId predecessor
+) {
+  size_t index = (size_t)state * (MAX_STATE_PREDECESSOR_COUNT + 1);
+  TSStateId *count = &self->contents[index];
+  if (
+    *count == 0 ||
+    (*count < MAX_STATE_PREDECESSOR_COUNT && self->contents[index + *count] != predecessor)
+  ) {
+    (*count)++;
+    self->contents[index + *count] = predecessor;
+  }
+}
+
+static inline const TSStateId *state_predecessor_map_get(
+  const StatePredecessorMap *self,
+  TSStateId state,
+  unsigned *count
+) {
+  size_t index = (size_t)state * (MAX_STATE_PREDECESSOR_COUNT + 1);
+  *count = self->contents[index];
+  return &self->contents[index + 1];
+}
+
+/****************
+ * AnalysisState
+ ****************/
+
+static unsigned analysis_state__recursion_depth(const AnalysisState *self) {
+  unsigned result = 0;
+  for (unsigned i = 0; i < self->depth; i++) {
+    TSSymbol symbol = self->stack[i].parent_symbol;
+    for (unsigned j = 0; j < i; j++) {
+      if (self->stack[j].parent_symbol == symbol) {
+        result++;
+        break;
+      }
+    }
+  }
+  return result;
+}
+
+static inline int analysis_state__compare_position(
+  AnalysisState *const *self,
+  AnalysisState *const *other
+) {
+  for (unsigned i = 0; i < (*self)->depth; i++) {
+    if (i >= (*other)->depth) return -1;
+    if ((*self)->stack[i].child_index < (*other)->stack[i].child_index) return -1;
+    if ((*self)->stack[i].child_index > (*other)->stack[i].child_index) return 1;
+  }
+  if ((*self)->depth < (*other)->depth) return 1;
+  if ((*self)->step_index < (*other)->step_index) return -1;
+  if ((*self)->step_index > (*other)->step_index) return 1;
+  return 0;
+}
+
+static inline int analysis_state__compare(
+  AnalysisState *const *self,
+  AnalysisState *const *other
+) {
+  int result = analysis_state__compare_position(self, other);
+  if (result != 0) return result;
+  for (unsigned i = 0; i < (*self)->depth; i++) {
+    if ((*self)->stack[i].parent_symbol < (*other)->stack[i].parent_symbol) return -1;
+    if ((*self)->stack[i].parent_symbol > (*other)->stack[i].parent_symbol) return 1;
+    if ((*self)->stack[i].parse_state < (*other)->stack[i].parse_state) return -1;
+    if ((*self)->stack[i].parse_state > (*other)->stack[i].parse_state) return 1;
+    if ((*self)->stack[i].field_id < (*other)->stack[i].field_id) return -1;
+    if ((*self)->stack[i].field_id > (*other)->stack[i].field_id) return 1;
+  }
+  return 0;
+}
+
+static inline AnalysisStateEntry *analysis_state__top(AnalysisState *self) {
+  if (self->depth == 0) {
+    return &self->stack[0];
+  }
+  return &self->stack[self->depth - 1];
+}
+
+static inline bool analysis_state__has_supertype(AnalysisState *self, TSSymbol symbol) {
+  for (unsigned i = 0; i < self->depth; i++) {
+    if (self->stack[i].parent_symbol == symbol) return true;
+  }
+  return false;
+}
+
+/******************
+ * AnalysisStateSet
+ ******************/
+
+// Obtains an `AnalysisState` instance, either by consuming one from this set's object pool, or by
+// cloning one from scratch.
+static inline AnalysisState *analysis_state_pool__clone_or_reuse(
+  AnalysisStateSet *self,
+  AnalysisState *borrowed_item
+) {
+  AnalysisState *new_item;
+  if (self->size) {
+    new_item = array_pop(self);
+  } else {
+    new_item = ts_malloc(sizeof(AnalysisState));
+  }
+  *new_item = *borrowed_item;
+  return new_item;
+}
+
+// Inserts a clone of the passed-in item at the appropriate position to maintain ordering in this
+// set. The set does not contain duplicates, so if the item is already present, it will not be
+// inserted, and no clone will be made.
+//
+// The caller retains ownership of the passed-in memory. However, the clone that is created by this
+// function will be managed by the state set.
+static inline void analysis_state_set__insert_sorted(
+  AnalysisStateSet *self,
+  AnalysisStateSet *pool,
+  AnalysisState *borrowed_item
+) {
+  unsigned index, exists;
+  array_search_sorted_with(self, analysis_state__compare, &borrowed_item, &index, &exists);
+  if (!exists) {
+    AnalysisState *new_item = analysis_state_pool__clone_or_reuse(pool, borrowed_item);
+    array_insert(self, index, new_item);
+  }
+}
+
+// Inserts a clone of the passed-in item at the end position of this list.
+//
+// IMPORTANT: The caller MUST ENSURE that this item is larger (by the comparison function
+// `analysis_state__compare`) than largest item already in this set. If items are inserted in the
+// wrong order, the set will not function properly for future use.
+//
+// The caller retains ownership of the passed-in memory. However, the clone that is created by this
+// function will be managed by the state set.
+static inline void analysis_state_set__push(
+  AnalysisStateSet *self,
+  AnalysisStateSet *pool,
+  AnalysisState *borrowed_item
+) {
+  AnalysisState *new_item = analysis_state_pool__clone_or_reuse(pool, borrowed_item);
+  array_push(self, new_item);
+}
+
+// Removes all items from this set, returning it to an empty state.
+static inline void analysis_state_set__clear(AnalysisStateSet *self, AnalysisStateSet *pool) {
+  array_push_all(pool, self);
+  array_clear(self);
+}
+
+// Releases all memory that is managed with this state set, including any items currently present.
+// After calling this function, the set is no longer suitable for use.
+static inline void analysis_state_set__delete(AnalysisStateSet *self) {
+  for (unsigned i = 0; i < self->size; i++) {
+    ts_free(self->contents[i]);
+  }
+  array_delete(self);
+}
+
+/****************
+ * QueryAnalyzer
+ ****************/
+
+static inline QueryAnalysis query_analysis__new(void) {
+  return (QueryAnalysis) {
+    .states = array_new(),
+    .next_states = array_new(),
+    .deeper_states = array_new(),
+    .state_pool = array_new(),
+    .final_step_indices = array_new(),
+    .finished_parent_symbols = array_new(),
+    .did_abort = false,
+  };
+}
+
+static inline void query_analysis__delete(QueryAnalysis *self) {
+  analysis_state_set__delete(&self->states);
+  analysis_state_set__delete(&self->next_states);
+  analysis_state_set__delete(&self->deeper_states);
+  analysis_state_set__delete(&self->state_pool);
+  array_delete(&self->final_step_indices);
+  array_delete(&self->finished_parent_symbols);
+}
+
+/***********************
+ * AnalysisSubgraphNode
+ ***********************/
+
+static inline int analysis_subgraph_node__compare(const AnalysisSubgraphNode *self, const AnalysisSubgraphNode *other) {
+  if (self->state < other->state) return -1;
+  if (self->state > other->state) return 1;
+  if (self->child_index < other->child_index) return -1;
+  if (self->child_index > other->child_index) return 1;
+  if (self->done < other->done) return -1;
+  if (self->done > other->done) return 1;
+  if (self->production_id < other->production_id) return -1;
+  if (self->production_id > other->production_id) return 1;
+  return 0;
+}
+
+/*********
+ * Query
+ *********/
+
+// The `pattern_map` contains a mapping from TSSymbol values to indices in the
+// `steps` array. For a given syntax node, the `pattern_map` makes it possible
+// to quickly find the starting steps of all of the patterns whose root matches
+// that node. Each entry has two fields: a `pattern_index`, which identifies one
+// of the patterns in the query, and a `step_index`, which indicates the start
+// offset of that pattern's steps within the `steps` array.
+//
+// The entries are sorted by the patterns' root symbols, and lookups use a
+// binary search. This ensures that the cost of this initial lookup step
+// scales logarithmically with the number of patterns in the query.
+//
+// This returns `true` if the symbol is present and `false` otherwise.
+// If the symbol is not present `*result` is set to the index where the
+// symbol should be inserted.
+static inline bool ts_query__pattern_map_search(
+  const TSQuery *self,
+  TSSymbol needle,
+  uint32_t *result
+) {
+  uint32_t base_index = self->wildcard_root_pattern_count;
+  uint32_t size = self->pattern_map.size - base_index;
+  if (size == 0) {
+    *result = base_index;
+    return false;
+  }
+  while (size > 1) {
+    uint32_t half_size = size / 2;
+    uint32_t mid_index = base_index + half_size;
+    TSSymbol mid_symbol = self->steps.contents[
+      self->pattern_map.contents[mid_index].step_index
+    ].symbol;
+    if (needle > mid_symbol) base_index = mid_index;
+    size -= half_size;
+  }
+
+  TSSymbol symbol = self->steps.contents[
+    self->pattern_map.contents[base_index].step_index
+  ].symbol;
+
+  if (needle > symbol) {
+    base_index++;
+    if (base_index < self->pattern_map.size) {
+      symbol = self->steps.contents[
+        self->pattern_map.contents[base_index].step_index
+      ].symbol;
+    }
+  }
+
+  *result = base_index;
+  return needle == symbol;
+}
+
+// Insert a new pattern's start index into the pattern map, maintaining
+// the pattern map's ordering invariant.
+static inline void ts_query__pattern_map_insert(
+  TSQuery *self,
+  TSSymbol symbol,
+  PatternEntry new_entry
+) {
+  uint32_t index;
+  ts_query__pattern_map_search(self, symbol, &index);
+
+  // Ensure that the entries are sorted not only by symbol, but also
+  // by pattern_index. This way, states for earlier patterns will be
+  // initiated first, which allows the ordering of the states array
+  // to be maintained more efficiently.
+  while (index < self->pattern_map.size) {
+    PatternEntry *entry = &self->pattern_map.contents[index];
+    if (
+      self->steps.contents[entry->step_index].symbol == symbol &&
+      entry->pattern_index < new_entry.pattern_index
+    ) {
+      index++;
+    } else {
+      break;
+    }
+  }
+
+  array_insert(&self->pattern_map, index, new_entry);
+}
+
+// Walk the subgraph for this non-terminal, tracking all of the possible
+// sequences of progress within the pattern.
+static void ts_query__perform_analysis(
+  TSQuery *self,
+  const AnalysisSubgraphArray *subgraphs,
+  QueryAnalysis *analysis
+) {
+  unsigned recursion_depth_limit = 0;
+  unsigned prev_final_step_count = 0;
+  array_clear(&analysis->final_step_indices);
+  array_clear(&analysis->finished_parent_symbols);
+
+  for (unsigned iteration = 0;; iteration++) {
+    if (iteration == MAX_ANALYSIS_ITERATION_COUNT) {
+      analysis->did_abort = true;
+      break;
+    }
+
+    #ifdef DEBUG_ANALYZE_QUERY
+      printf("Iteration: %u. Final step indices:", iteration);
+      for (unsigned j = 0; j < analysis->final_step_indices.size; j++) {
+        printf(" %4u", analysis->final_step_indices.contents[j]);
+      }
+      printf("\n");
+      for (unsigned j = 0; j < analysis->states.size; j++) {
+        AnalysisState *state = analysis->states.contents[j];
+        printf("  %3u: step: %u, stack: [", j, state->step_index);
+        for (unsigned k = 0; k < state->depth; k++) {
+          printf(
+            " {%s, child: %u, state: %4u",
+            self->language->symbol_names[state->stack[k].parent_symbol],
+            state->stack[k].child_index,
+            state->stack[k].parse_state
+          );
+          if (state->stack[k].field_id) printf(", field: %s", self->language->field_names[state->stack[k].field_id]);
+          if (state->stack[k].done) printf(", DONE");
+          printf("}");
+        }
+        printf(" ]\n");
+      }
+    #endif
+
+    // If no further progress can be made within the current recursion depth limit, then
+    // bump the depth limit by one, and continue to process the states the exceeded the
+    // limit. But only allow this if progress has been made since the last time the depth
+    // limit was increased.
+    if (analysis->states.size == 0) {
+      if (
+        analysis->deeper_states.size > 0 &&
+        analysis->final_step_indices.size > prev_final_step_count
+      ) {
+        #ifdef DEBUG_ANALYZE_QUERY
+          printf("Increase recursion depth limit to %u\n", recursion_depth_limit + 1);
+        #endif
+
+        prev_final_step_count = analysis->final_step_indices.size;
+        recursion_depth_limit++;
+        AnalysisStateSet _states = analysis->states;
+        analysis->states = analysis->deeper_states;
+        analysis->deeper_states = _states;
+        continue;
+      }
+
+      break;
+    }
+
+    analysis_state_set__clear(&analysis->next_states, &analysis->state_pool);
+    for (unsigned j = 0; j < analysis->states.size; j++) {
+      AnalysisState * const state = analysis->states.contents[j];
+
+      // For efficiency, it's important to avoid processing the same analysis state more
+      // than once. To achieve this, keep the states in order of ascending position within
+      // their hypothetical syntax trees. In each iteration of this loop, start by advancing
+      // the states that have made the least progress. Avoid advancing states that have already
+      // made more progress.
+      if (analysis->next_states.size > 0) {
+        int comparison = analysis_state__compare_position(
+          &state,
+          array_back(&analysis->next_states)
+        );
+        if (comparison == 0) {
+          analysis_state_set__insert_sorted(&analysis->next_states, &analysis->state_pool, state);
+          continue;
+        } else if (comparison > 0) {
+          #ifdef DEBUG_ANALYZE_QUERY
+            printf("Terminate iteration at state %u\n", j);
+          #endif
+          while (j < analysis->states.size) {
+            analysis_state_set__push(
+              &analysis->next_states,
+              &analysis->state_pool,
+              analysis->states.contents[j]
+            );
+            j++;
+          }
+          break;
+        }
+      }
+
+      const TSStateId parse_state = analysis_state__top(state)->parse_state;
+      const TSSymbol parent_symbol = analysis_state__top(state)->parent_symbol;
+      const TSFieldId parent_field_id = analysis_state__top(state)->field_id;
+      const unsigned child_index = analysis_state__top(state)->child_index;
+      const QueryStep * const step = &self->steps.contents[state->step_index];
+
+      unsigned subgraph_index, exists;
+      array_search_sorted_by(subgraphs, .symbol, parent_symbol, &subgraph_index, &exists);
+      if (!exists) continue;
+      const AnalysisSubgraph *subgraph = &subgraphs->contents[subgraph_index];
+
+      // Follow every possible path in the parse table, but only visit states that
+      // are part of the subgraph for the current symbol.
+      LookaheadIterator lookahead_iterator = ts_language_lookaheads(self->language, parse_state);
+      while (ts_lookahead_iterator__next(&lookahead_iterator)) {
+        TSSymbol sym = lookahead_iterator.symbol;
+
+        AnalysisSubgraphNode successor = {
+          .state = parse_state,
+          .child_index = child_index,
+        };
+        if (lookahead_iterator.action_count) {
+          const TSParseAction *action = &lookahead_iterator.actions[lookahead_iterator.action_count - 1];
+          if (action->type == TSParseActionTypeShift) {
+            if (!action->shift.extra) {
+              successor.state = action->shift.state;
+              successor.child_index++;
+            }
+          } else {
+            continue;
+          }
+        } else if (lookahead_iterator.next_state != 0) {
+          successor.state = lookahead_iterator.next_state;
+          successor.child_index++;
+        } else {
+          continue;
+        }
+
+        unsigned node_index;
+        array_search_sorted_with(
+          &subgraph->nodes,
+          analysis_subgraph_node__compare, &successor,
+          &node_index, &exists
+        );
+        while (node_index < subgraph->nodes.size) {
+          AnalysisSubgraphNode *node = &subgraph->nodes.contents[node_index++];
+          if (node->state != successor.state || node->child_index != successor.child_index) break;
+
+          // Use the subgraph to determine what alias and field will eventually be applied
+          // to this child node.
+          TSSymbol alias = ts_language_alias_at(self->language, node->production_id, child_index);
+          TSSymbol visible_symbol = alias
+            ? alias
+            : self->language->symbol_metadata[sym].visible
+              ? self->language->public_symbol_map[sym]
+              : 0;
+          TSFieldId field_id = parent_field_id;
+          if (!field_id) {
+            const TSFieldMapEntry *field_map, *field_map_end;
+            ts_language_field_map(self->language, node->production_id, &field_map, &field_map_end);
+            for (; field_map != field_map_end; field_map++) {
+              if (!field_map->inherited && field_map->child_index == child_index) {
+                field_id = field_map->field_id;
+                break;
+              }
+            }
+          }
+
+          // Create a new state that has advanced past this hypothetical subtree.
+          AnalysisState next_state = *state;
+          AnalysisStateEntry *next_state_top = analysis_state__top(&next_state);
+          next_state_top->child_index = successor.child_index;
+          next_state_top->parse_state = successor.state;
+          if (node->done) next_state_top->done = true;
+
+          // Determine if this hypothetical child node would match the current step
+          // of the query pattern.
+          bool does_match = false;
+          if (visible_symbol) {
+            does_match = true;
+            if (step->symbol == WILDCARD_SYMBOL) {
+              if (
+                step->is_named &&
+                !self->language->symbol_metadata[visible_symbol].named
+              ) does_match = false;
+            } else if (step->symbol != visible_symbol) {
+              does_match = false;
+            }
+            if (step->field && step->field != field_id) {
+              does_match = false;
+            }
+            if (
+              step->supertype_symbol &&
+              !analysis_state__has_supertype(state, step->supertype_symbol)
+            ) does_match = false;
+          }
+
+          // If this child is hidden, then descend into it and walk through its children.
+          // If the top entry of the stack is at the end of its rule, then that entry can
+          // be replaced. Otherwise, push a new entry onto the stack.
+          else if (sym >= self->language->token_count) {
+            if (!next_state_top->done) {
+              if (next_state.depth + 1 >= MAX_ANALYSIS_STATE_DEPTH) {
+                #ifdef DEBUG_ANALYZE_QUERY
+                  printf("Exceeded depth limit for state %u\n", j);
+                #endif
+
+                analysis->did_abort = true;
+                continue;
+              }
+
+              next_state.depth++;
+              next_state_top = analysis_state__top(&next_state);
+            }
+
+            *next_state_top = (AnalysisStateEntry) {
+              .parse_state = parse_state,
+              .parent_symbol = sym,
+              .child_index = 0,
+              .field_id = field_id,
+              .done = false,
+            };
+
+            if (analysis_state__recursion_depth(&next_state) > recursion_depth_limit) {
+              analysis_state_set__insert_sorted(
+                &analysis->deeper_states,
+                &analysis->state_pool,
+                &next_state
+              );
+              continue;
+            }
+          }
+
+          // Pop from the stack when this state reached the end of its current syntax node.
+          while (next_state.depth > 0 && next_state_top->done) {
+            next_state.depth--;
+            next_state_top = analysis_state__top(&next_state);
+          }
+
+          // If this hypothetical child did match the current step of the query pattern,
+          // then advance to the next step at the current depth. This involves skipping
+          // over any descendant steps of the current child.
+          const QueryStep *next_step = step;
+          if (does_match) {
+            for (;;) {
+              next_state.step_index++;
+              next_step = &self->steps.contents[next_state.step_index];
+              if (
+                next_step->depth == PATTERN_DONE_MARKER ||
+                next_step->depth <= step->depth
+              ) break;
+            }
+          } else if (successor.state == parse_state) {
+            continue;
+          }
+
+          for (;;) {
+            // Skip pass-through states. Although these states have alternatives, they are only
+            // used to implement repetitions, and query analysis does not need to process
+            // repetitions in order to determine whether steps are possible and definite.
+            if (next_step->is_pass_through) {
+              next_state.step_index++;
+              next_step++;
+              continue;
+            }
+
+            // If the pattern is finished or hypothetical parent node is complete, then
+            // record that matching can terminate at this step of the pattern. Otherwise,
+            // add this state to the list of states to process on the next iteration.
+            if (!next_step->is_dead_end) {
+              bool did_finish_pattern = self->steps.contents[next_state.step_index].depth != step->depth;
+              if (did_finish_pattern) {
+                array_insert_sorted_by(&analysis->finished_parent_symbols, , state->root_symbol);
+              } else if (next_state.depth == 0) {
+                array_insert_sorted_by(&analysis->final_step_indices, , next_state.step_index);
+              } else {
+                analysis_state_set__insert_sorted(&analysis->next_states, &analysis->state_pool, &next_state);
+              }
+            }
+
+            // If the state has advanced to a step with an alternative step, then add another state
+            // at that alternative step. This process is simpler than the process of actually matching a
+            // pattern during query execution, because for the purposes of query analysis, there is no
+            // need to process repetitions.
+            if (
+              does_match &&
+              next_step->alternative_index != NONE &&
+              next_step->alternative_index > next_state.step_index
+            ) {
+              next_state.step_index = next_step->alternative_index;
+              next_step = &self->steps.contents[next_state.step_index];
+            } else {
+              break;
+            }
+          }
+        }
+      }
+    }
+
+    AnalysisStateSet _states = analysis->states;
+    analysis->states = analysis->next_states;
+    analysis->next_states = _states;
+  }
+}
+
+static bool ts_query__analyze_patterns(TSQuery *self, unsigned *error_offset) {
+  Array(uint16_t) non_rooted_pattern_start_steps = array_new();
+  for (unsigned i = 0; i < self->pattern_map.size; i++) {
+    PatternEntry *pattern = &self->pattern_map.contents[i];
+    if (!pattern->is_rooted) {
+      QueryStep *step = &self->steps.contents[pattern->step_index];
+      if (step->symbol != WILDCARD_SYMBOL) {
+        array_push(&non_rooted_pattern_start_steps, i);
+      }
+    }
+  }
+
+  // Walk forward through all of the steps in the query, computing some
+  // basic information about each step. Mark all of the steps that contain
+  // captures, and record the indices of all of the steps that have child steps.
+  Array(uint32_t) parent_step_indices = array_new();
+  for (unsigned i = 0; i < self->steps.size; i++) {
+    QueryStep *step = &self->steps.contents[i];
+    if (step->depth == PATTERN_DONE_MARKER) {
+      step->parent_pattern_guaranteed = true;
+      step->root_pattern_guaranteed = true;
+      continue;
+    }
+
+    bool has_children = false;
+    bool is_wildcard = step->symbol == WILDCARD_SYMBOL;
+    step->contains_captures = step->capture_ids[0] != NONE;
+    for (unsigned j = i + 1; j < self->steps.size; j++) {
+      QueryStep *next_step = &self->steps.contents[j];
+      if (
+        next_step->depth == PATTERN_DONE_MARKER ||
+        next_step->depth <= step->depth
+      ) break;
+      if (next_step->capture_ids[0] != NONE) {
+        step->contains_captures = true;
+      }
+      if (!is_wildcard) {
+        next_step->root_pattern_guaranteed = true;
+        next_step->parent_pattern_guaranteed = true;
+      }
+      has_children = true;
+    }
+
+    if (has_children && !is_wildcard) {
+      array_push(&parent_step_indices, i);
+    }
+  }
+
+  // For every parent symbol in the query, initialize an 'analysis subgraph'.
+  // This subgraph lists all of the states in the parse table that are directly
+  // involved in building subtrees for this symbol.
+  //
+  // In addition to the parent symbols in the query, construct subgraphs for all
+  // of the hidden symbols in the grammar, because these might occur within
+  // one of the parent nodes, such that their children appear to belong to the
+  // parent.
+  AnalysisSubgraphArray subgraphs = array_new();
+  for (unsigned i = 0; i < parent_step_indices.size; i++) {
+    uint32_t parent_step_index = parent_step_indices.contents[i];
+    TSSymbol parent_symbol = self->steps.contents[parent_step_index].symbol;
+    AnalysisSubgraph subgraph = { .symbol = parent_symbol };
+    array_insert_sorted_by(&subgraphs, .symbol, subgraph);
+  }
+  for (TSSymbol sym = (uint16_t)self->language->token_count; sym < (uint16_t)self->language->symbol_count; sym++) {
+    if (!ts_language_symbol_metadata(self->language, sym).visible) {
+      AnalysisSubgraph subgraph = { .symbol = sym };
+      array_insert_sorted_by(&subgraphs, .symbol, subgraph);
+    }
+  }
+
+  // Scan the parse table to find the data needed to populate these subgraphs.
+  // Collect three things during this scan:
+  //   1) All of the parse states where one of these symbols can start.
+  //   2) All of the parse states where one of these symbols can end, along
+  //      with information about the node that would be created.
+  //   3) A list of predecessor states for each state.
+  StatePredecessorMap predecessor_map = state_predecessor_map_new(self->language);
+  for (TSStateId state = 1; state < (uint16_t)self->language->state_count; state++) {
+    unsigned subgraph_index, exists;
+    LookaheadIterator lookahead_iterator = ts_language_lookaheads(self->language, state);
+    while (ts_lookahead_iterator__next(&lookahead_iterator)) {
+      if (lookahead_iterator.action_count) {
+        for (unsigned i = 0; i < lookahead_iterator.action_count; i++) {
+          const TSParseAction *action = &lookahead_iterator.actions[i];
+          if (action->type == TSParseActionTypeReduce) {
+            const TSSymbol *aliases, *aliases_end;
+            ts_language_aliases_for_symbol(
+              self->language,
+              action->reduce.symbol,
+              &aliases,
+              &aliases_end
+            );
+            for (const TSSymbol *symbol = aliases; symbol < aliases_end; symbol++) {
+              array_search_sorted_by(
+                &subgraphs,
+                .symbol,
+                *symbol,
+                &subgraph_index,
+                &exists
+              );
+              if (exists) {
+                AnalysisSubgraph *subgraph = &subgraphs.contents[subgraph_index];
+                if (subgraph->nodes.size == 0 || array_back(&subgraph->nodes)->state != state) {
+                  array_push(&subgraph->nodes, ((AnalysisSubgraphNode) {
+                    .state = state,
+                    .production_id = action->reduce.production_id,
+                    .child_index = action->reduce.child_count,
+                    .done = true,
+                  }));
+                }
+              }
+            }
+          } else if (action->type == TSParseActionTypeShift && !action->shift.extra) {
+            TSStateId next_state = action->shift.state;
+            state_predecessor_map_add(&predecessor_map, next_state, state);
+          }
+        }
+      } else if (lookahead_iterator.next_state != 0) {
+        if (lookahead_iterator.next_state != state) {
+          state_predecessor_map_add(&predecessor_map, lookahead_iterator.next_state, state);
+        }
+        if (ts_language_state_is_primary(self->language, state)) {
+          const TSSymbol *aliases, *aliases_end;
+          ts_language_aliases_for_symbol(
+            self->language,
+            lookahead_iterator.symbol,
+            &aliases,
+            &aliases_end
+          );
+          for (const TSSymbol *symbol = aliases; symbol < aliases_end; symbol++) {
+            array_search_sorted_by(
+              &subgraphs,
+              .symbol,
+              *symbol,
+              &subgraph_index,
+              &exists
+            );
+            if (exists) {
+              AnalysisSubgraph *subgraph = &subgraphs.contents[subgraph_index];
+              if (
+                subgraph->start_states.size == 0 ||
+                *array_back(&subgraph->start_states) != state
+              )
+              array_push(&subgraph->start_states, state);
+            }
+          }
+        }
+      }
+    }
+  }
+
+  // For each subgraph, compute the preceding states by walking backward
+  // from the end states using the predecessor map.
+  Array(AnalysisSubgraphNode) next_nodes = array_new();
+  for (unsigned i = 0; i < subgraphs.size; i++) {
+    AnalysisSubgraph *subgraph = &subgraphs.contents[i];
+    if (subgraph->nodes.size == 0) {
+      array_delete(&subgraph->start_states);
+      array_erase(&subgraphs, i);
+      i--;
+      continue;
+    }
+    array_assign(&next_nodes, &subgraph->nodes);
+    while (next_nodes.size > 0) {
+      AnalysisSubgraphNode node = array_pop(&next_nodes);
+      if (node.child_index > 1) {
+        unsigned predecessor_count;
+        const TSStateId *predecessors = state_predecessor_map_get(
+          &predecessor_map,
+          node.state,
+          &predecessor_count
+        );
+        for (unsigned j = 0; j < predecessor_count; j++) {
+          AnalysisSubgraphNode predecessor_node = {
+            .state = predecessors[j],
+            .child_index = node.child_index - 1,
+            .production_id = node.production_id,
+            .done = false,
+          };
+          unsigned index, exists;
+          array_search_sorted_with(
+            &subgraph->nodes, analysis_subgraph_node__compare, &predecessor_node,
+            &index, &exists
+          );
+          if (!exists) {
+            array_insert(&subgraph->nodes, index, predecessor_node);
+            array_push(&next_nodes, predecessor_node);
+          }
+        }
+      }
+    }
+  }
+
+  #ifdef DEBUG_ANALYZE_QUERY
+    printf("\nSubgraphs:\n");
+    for (unsigned i = 0; i < subgraphs.size; i++) {
+      AnalysisSubgraph *subgraph = &subgraphs.contents[i];
+      printf("  %u, %s:\n", subgraph->symbol, ts_language_symbol_name(self->language, subgraph->symbol));
+      for (unsigned j = 0; j < subgraph->start_states.size; j++) {
+        printf(
+          "    {state: %u}\n",
+          subgraph->start_states.contents[j]
+        );
+      }
+      for (unsigned j = 0; j < subgraph->nodes.size; j++) {
+        AnalysisSubgraphNode *node = &subgraph->nodes.contents[j];
+        printf(
+          "    {state: %u, child_index: %u, production_id: %u, done: %d}\n",
+          node->state, node->child_index, node->production_id, node->done
+        );
+      }
+      printf("\n");
+    }
+  #endif
+
+  // For each non-terminal pattern, determine if the pattern can successfully match,
+  // and identify all of the possible children within the pattern where matching could fail.
+  bool all_patterns_are_valid = true;
+  QueryAnalysis analysis = query_analysis__new();
+  for (unsigned i = 0; i < parent_step_indices.size; i++) {
+    uint16_t parent_step_index = parent_step_indices.contents[i];
+    uint16_t parent_depth = self->steps.contents[parent_step_index].depth;
+    TSSymbol parent_symbol = self->steps.contents[parent_step_index].symbol;
+    if (parent_symbol == ts_builtin_sym_error) continue;
+
+    // Find the subgraph that corresponds to this pattern's root symbol. If the pattern's
+    // root symbol is a terminal, then return an error.
+    unsigned subgraph_index, exists;
+    array_search_sorted_by(&subgraphs, .symbol, parent_symbol, &subgraph_index, &exists);
+    if (!exists) {
+      unsigned first_child_step_index = parent_step_index + 1;
+      uint32_t j, child_exists;
+      array_search_sorted_by(&self->step_offsets, .step_index, first_child_step_index, &j, &child_exists);
+      assert(child_exists);
+      *error_offset = self->step_offsets.contents[j].byte_offset;
+      all_patterns_are_valid = false;
+      break;
+    }
+
+    // Initialize an analysis state at every parse state in the table where
+    // this parent symbol can occur.
+    AnalysisSubgraph *subgraph = &subgraphs.contents[subgraph_index];
+    analysis_state_set__clear(&analysis.states, &analysis.state_pool);
+    analysis_state_set__clear(&analysis.deeper_states, &analysis.state_pool);
+    for (unsigned j = 0; j < subgraph->start_states.size; j++) {
+      TSStateId parse_state = subgraph->start_states.contents[j];
+      analysis_state_set__push(&analysis.states, &analysis.state_pool, &((AnalysisState) {
+        .step_index = parent_step_index + 1,
+        .stack = {
+          [0] = {
+            .parse_state = parse_state,
+            .parent_symbol = parent_symbol,
+            .child_index = 0,
+            .field_id = 0,
+            .done = false,
+          },
+        },
+        .depth = 1,
+        .root_symbol = parent_symbol,
+      }));
+    }
+
+    #ifdef DEBUG_ANALYZE_QUERY
+      printf(
+        "\nWalk states for %s:\n",
+        ts_language_symbol_name(self->language, analysis.states.contents[0]->stack[0].parent_symbol)
+      );
+    #endif
+
+    analysis.did_abort = false;
+    ts_query__perform_analysis(self, &subgraphs, &analysis);
+
+    // If this pattern could not be fully analyzed, then every step should
+    // be considered fallible.
+    if (analysis.did_abort) {
+      for (unsigned j = parent_step_index + 1; j < self->steps.size; j++) {
+        QueryStep *step = &self->steps.contents[j];
+        if (
+          step->depth <= parent_depth ||
+          step->depth == PATTERN_DONE_MARKER
+        ) break;
+        if (!step->is_dead_end) {
+          step->parent_pattern_guaranteed = false;
+          step->root_pattern_guaranteed = false;
+        }
+      }
+      continue;
+    }
+
+    // If this pattern cannot match, store the pattern index so that it can be
+    // returned to the caller.
+    if (analysis.finished_parent_symbols.size == 0) {
+      assert(analysis.final_step_indices.size > 0);
+      uint16_t impossible_step_index = *array_back(&analysis.final_step_indices);
+      uint32_t j, impossible_exists;
+      array_search_sorted_by(&self->step_offsets, .step_index, impossible_step_index, &j, &impossible_exists);
+      if (j >= self->step_offsets.size) j = self->step_offsets.size - 1;
+      *error_offset = self->step_offsets.contents[j].byte_offset;
+      all_patterns_are_valid = false;
+      break;
+    }
+
+    // Mark as fallible any step where a match terminated.
+    // Later, this property will be propagated to all of the step's predecessors.
+    for (unsigned j = 0; j < analysis.final_step_indices.size; j++) {
+      uint32_t final_step_index = analysis.final_step_indices.contents[j];
+      QueryStep *step = &self->steps.contents[final_step_index];
+      if (
+        step->depth != PATTERN_DONE_MARKER &&
+        step->depth > parent_depth &&
+        !step->is_dead_end
+      ) {
+        step->parent_pattern_guaranteed = false;
+        step->root_pattern_guaranteed = false;
+      }
+    }
+  }
+
+  // Mark as indefinite any step with captures that are used in predicates.
+  Array(uint16_t) predicate_capture_ids = array_new();
+  for (unsigned i = 0; i < self->patterns.size; i++) {
+    QueryPattern *pattern = &self->patterns.contents[i];
+
+    // Gather all of the captures that are used in predicates for this pattern.
+    array_clear(&predicate_capture_ids);
+    for (
+      unsigned start = pattern->predicate_steps.offset,
+      end = start + pattern->predicate_steps.length,
+      j = start; j < end; j++
+    ) {
+      TSQueryPredicateStep *step = &self->predicate_steps.contents[j];
+      if (step->type == TSQueryPredicateStepTypeCapture) {
+        uint16_t value_id = step->value_id;
+        array_insert_sorted_by(&predicate_capture_ids, , value_id);
+      }
+    }
+
+    // Find all of the steps that have these captures.
+    for (
+      unsigned start = pattern->steps.offset,
+      end = start + pattern->steps.length,
+      j = start; j < end; j++
+    ) {
+      QueryStep *step = &self->steps.contents[j];
+      for (unsigned k = 0; k < MAX_STEP_CAPTURE_COUNT; k++) {
+        uint16_t capture_id = step->capture_ids[k];
+        if (capture_id == NONE) break;
+        unsigned index, exists;
+        array_search_sorted_by(&predicate_capture_ids, , capture_id, &index, &exists);
+        if (exists) {
+          step->root_pattern_guaranteed = false;
+          break;
+        }
+      }
+    }
+  }
+
+  // Propagate fallibility. If a pattern is fallible at a given step, then it is
+  // fallible at all of its preceding steps.
+  bool done = self->steps.size == 0;
+  while (!done) {
+    done = true;
+    for (unsigned i = self->steps.size - 1; i > 0; i--) {
+      QueryStep *step = &self->steps.contents[i];
+      if (step->depth == PATTERN_DONE_MARKER) continue;
+
+      // Determine if this step is definite or has definite alternatives.
+      bool parent_pattern_guaranteed = false;
+      for (;;) {
+        if (step->root_pattern_guaranteed) {
+          parent_pattern_guaranteed = true;
+          break;
+        }
+        if (step->alternative_index == NONE || step->alternative_index < i) {
+          break;
+        }
+        step = &self->steps.contents[step->alternative_index];
+      }
+
+      // If not, mark its predecessor as indefinite.
+      if (!parent_pattern_guaranteed) {
+        QueryStep *prev_step = &self->steps.contents[i - 1];
+        if (
+          !prev_step->is_dead_end &&
+          prev_step->depth != PATTERN_DONE_MARKER &&
+          prev_step->root_pattern_guaranteed
+        ) {
+          prev_step->root_pattern_guaranteed = false;
+          done = false;
+        }
+      }
+    }
+  }
+
+  #ifdef DEBUG_ANALYZE_QUERY
+    printf("Steps:\n");
+    for (unsigned i = 0; i < self->steps.size; i++) {
+      QueryStep *step = &self->steps.contents[i];
+      if (step->depth == PATTERN_DONE_MARKER) {
+        printf("  %u: DONE\n", i);
+      } else {
+        printf(
+          "  %u: {symbol: %s, field: %s, depth: %u, parent_pattern_guaranteed: %d, root_pattern_guaranteed: %d}\n",
+          i,
+          (step->symbol == WILDCARD_SYMBOL)
+            ? "ANY"
+            : ts_language_symbol_name(self->language, step->symbol),
+          (step->field ? ts_language_field_name_for_id(self->language, step->field) : "-"),
+          step->depth,
+          step->parent_pattern_guaranteed,
+          step->root_pattern_guaranteed
+        );
+      }
+    }
+  #endif
+
+  // Determine which repetition symbols in this language have the possibility
+  // of matching non-rooted patterns in this query. These repetition symbols
+  // prevent certain optimizations with range restrictions.
+  analysis.did_abort = false;
+  for (uint32_t i = 0; i < non_rooted_pattern_start_steps.size; i++) {
+    uint16_t pattern_entry_index = non_rooted_pattern_start_steps.contents[i];
+    PatternEntry *pattern_entry = &self->pattern_map.contents[pattern_entry_index];
+
+    analysis_state_set__clear(&analysis.states, &analysis.state_pool);
+    analysis_state_set__clear(&analysis.deeper_states, &analysis.state_pool);
+    for (unsigned j = 0; j < subgraphs.size; j++) {
+      AnalysisSubgraph *subgraph = &subgraphs.contents[j];
+      TSSymbolMetadata metadata = ts_language_symbol_metadata(self->language, subgraph->symbol);
+      if (metadata.visible || metadata.named) continue;
+
+      for (uint32_t k = 0; k < subgraph->start_states.size; k++) {
+        TSStateId parse_state = subgraph->start_states.contents[k];
+        analysis_state_set__push(&analysis.states, &analysis.state_pool, &((AnalysisState) {
+          .step_index = pattern_entry->step_index,
+          .stack = {
+            [0] = {
+              .parse_state = parse_state,
+              .parent_symbol = subgraph->symbol,
+              .child_index = 0,
+              .field_id = 0,
+              .done = false,
+            },
+          },
+          .root_symbol = subgraph->symbol,
+          .depth = 1,
+        }));
+      }
+    }
+
+    #ifdef DEBUG_ANALYZE_QUERY
+      printf("\nWalk states for rootless pattern step %u:\n", pattern_entry->step_index);
+    #endif
+
+    ts_query__perform_analysis(
+      self,
+      &subgraphs,
+      &analysis
+    );
+
+    if (analysis.finished_parent_symbols.size > 0) {
+      self->patterns.contents[pattern_entry->pattern_index].is_non_local = true;
+    }
+
+    for (unsigned k = 0; k < analysis.finished_parent_symbols.size; k++) {
+      TSSymbol symbol = analysis.finished_parent_symbols.contents[k];
+      array_insert_sorted_by(&self->repeat_symbols_with_rootless_patterns, , symbol);
+    }
+  }
+
+  #ifdef DEBUG_ANALYZE_QUERY
+    if (self->repeat_symbols_with_rootless_patterns.size > 0) {
+      printf("\nRepetition symbols with rootless patterns:\n");
+      printf("aborted analysis: %d\n", analysis.did_abort);
+      for (unsigned i = 0; i < self->repeat_symbols_with_rootless_patterns.size; i++) {
+        TSSymbol symbol = self->repeat_symbols_with_rootless_patterns.contents[i];
+        printf("  %u, %s\n", symbol, ts_language_symbol_name(self->language, symbol));
+      }
+      printf("\n");
+    }
+  #endif
+
+  // Cleanup
+  for (unsigned i = 0; i < subgraphs.size; i++) {
+    array_delete(&subgraphs.contents[i].start_states);
+    array_delete(&subgraphs.contents[i].nodes);
+  }
+  array_delete(&subgraphs);
+  query_analysis__delete(&analysis);
+  array_delete(&next_nodes);
+  array_delete(&non_rooted_pattern_start_steps);
+  array_delete(&parent_step_indices);
+  array_delete(&predicate_capture_ids);
+  state_predecessor_map_delete(&predecessor_map);
+
+  return all_patterns_are_valid;
+}
+
+static void ts_query__add_negated_fields(
+  TSQuery *self,
+  uint16_t step_index,
+  TSFieldId *field_ids,
+  uint16_t field_count
+) {
+  QueryStep *step = &self->steps.contents[step_index];
+
+  // The negated field array stores a list of field lists, separated by zeros.
+  // Try to find the start index of an existing list that matches this new list.
+  bool failed_match = false;
+  unsigned match_count = 0;
+  unsigned start_i = 0;
+  for (unsigned i = 0; i < self->negated_fields.size; i++) {
+    TSFieldId existing_field_id = self->negated_fields.contents[i];
+
+    // At each zero value, terminate the match attempt. If we've exactly
+    // matched the new field list, then reuse this index. Otherwise,
+    // start over the matching process.
+    if (existing_field_id == 0) {
+      if (match_count == field_count) {
+        step->negated_field_list_id = start_i;
+        return;
+      } else {
+        start_i = i + 1;
+        match_count = 0;
+        failed_match = false;
+      }
+    }
+
+    // If the existing list matches our new list so far, then advance
+    // to the next element of the new list.
+    else if (
+      match_count < field_count &&
+      existing_field_id == field_ids[match_count] &&
+      !failed_match
+    ) {
+      match_count++;
+    }
+
+    // Otherwise, this existing list has failed to match.
+    else {
+      match_count = 0;
+      failed_match = true;
+    }
+  }
+
+  step->negated_field_list_id = self->negated_fields.size;
+  array_extend(&self->negated_fields, field_count, field_ids);
+  array_push(&self->negated_fields, 0);
+}
+
+static TSQueryError ts_query__parse_string_literal(
+  TSQuery *self,
+  Stream *stream
+) {
+  const char *string_start = stream->input;
+  if (stream->next != '"') return TSQueryErrorSyntax;
+  stream_advance(stream);
+  const char *prev_position = stream->input;
+
+  bool is_escaped = false;
+  array_clear(&self->string_buffer);
+  for (;;) {
+    if (is_escaped) {
+      is_escaped = false;
+      switch (stream->next) {
+        case 'n':
+          array_push(&self->string_buffer, '\n');
+          break;
+        case 'r':
+          array_push(&self->string_buffer, '\r');
+          break;
+        case 't':
+          array_push(&self->string_buffer, '\t');
+          break;
+        case '0':
+          array_push(&self->string_buffer, '\0');
+          break;
+        default:
+          array_extend(&self->string_buffer, stream->next_size, stream->input);
+          break;
+      }
+      prev_position = stream->input + stream->next_size;
+    } else {
+      if (stream->next == '\\') {
+        array_extend(&self->string_buffer, (uint32_t)(stream->input - prev_position), prev_position);
+        prev_position = stream->input + 1;
+        is_escaped = true;
+      } else if (stream->next == '"') {
+        array_extend(&self->string_buffer, (uint32_t)(stream->input - prev_position), prev_position);
+        stream_advance(stream);
+        return TSQueryErrorNone;
+      } else if (stream->next == '\n') {
+        stream_reset(stream, string_start);
+        return TSQueryErrorSyntax;
+      }
+    }
+    if (!stream_advance(stream)) {
+      stream_reset(stream, string_start);
+      return TSQueryErrorSyntax;
+    }
+  }
+}
+
+// Parse a single predicate associated with a pattern, adding it to the
+// query's internal `predicate_steps` array. Predicates are arbitrary
+// S-expressions associated with a pattern which are meant to be handled at
+// a higher level of abstraction, such as the Rust/JavaScript bindings. They
+// can contain '@'-prefixed capture names, double-quoted strings, and bare
+// symbols, which also represent strings.
+static TSQueryError ts_query__parse_predicate(
+  TSQuery *self,
+  Stream *stream
+) {
+  if (!stream_is_ident_start(stream)) return TSQueryErrorSyntax;
+  const char *predicate_name = stream->input;
+  stream_scan_identifier(stream);
+  uint32_t length = (uint32_t)(stream->input - predicate_name);
+  uint16_t id = symbol_table_insert_name(
+    &self->predicate_values,
+    predicate_name,
+    length
+  );
+  array_push(&self->predicate_steps, ((TSQueryPredicateStep) {
+    .type = TSQueryPredicateStepTypeString,
+    .value_id = id,
+  }));
+  stream_skip_whitespace(stream);
+
+  for (;;) {
+    if (stream->next == ')') {
+      stream_advance(stream);
+      stream_skip_whitespace(stream);
+      array_push(&self->predicate_steps, ((TSQueryPredicateStep) {
+        .type = TSQueryPredicateStepTypeDone,
+        .value_id = 0,
+      }));
+      break;
+    }
+
+    // Parse an '@'-prefixed capture name
+    else if (stream->next == '@') {
+      stream_advance(stream);
+
+      // Parse the capture name
+      if (!stream_is_ident_start(stream)) return TSQueryErrorSyntax;
+      const char *capture_name = stream->input;
+      stream_scan_identifier(stream);
+      uint32_t capture_length = (uint32_t)(stream->input - capture_name);
+
+      // Add the capture id to the first step of the pattern
+      int capture_id = symbol_table_id_for_name(
+        &self->captures,
+        capture_name,
+        capture_length
+      );
+      if (capture_id == -1) {
+        stream_reset(stream, capture_name);
+        return TSQueryErrorCapture;
+      }
+
+      array_push(&self->predicate_steps, ((TSQueryPredicateStep) {
+        .type = TSQueryPredicateStepTypeCapture,
+        .value_id = capture_id,
+      }));
+    }
+
+    // Parse a string literal
+    else if (stream->next == '"') {
+      TSQueryError e = ts_query__parse_string_literal(self, stream);
+      if (e) return e;
+      uint16_t query_id = symbol_table_insert_name(
+        &self->predicate_values,
+        self->string_buffer.contents,
+        self->string_buffer.size
+      );
+      array_push(&self->predicate_steps, ((TSQueryPredicateStep) {
+        .type = TSQueryPredicateStepTypeString,
+        .value_id = query_id,
+      }));
+    }
+
+    // Parse a bare symbol
+    else if (stream_is_ident_start(stream)) {
+      const char *symbol_start = stream->input;
+      stream_scan_identifier(stream);
+      uint32_t symbol_length = (uint32_t)(stream->input - symbol_start);
+      uint16_t query_id = symbol_table_insert_name(
+        &self->predicate_values,
+        symbol_start,
+        symbol_length
+      );
+      array_push(&self->predicate_steps, ((TSQueryPredicateStep) {
+        .type = TSQueryPredicateStepTypeString,
+        .value_id = query_id,
+      }));
+    }
+
+    else {
+      return TSQueryErrorSyntax;
+    }
+
+    stream_skip_whitespace(stream);
+  }
+
+  return 0;
+}
+
+// Read one S-expression pattern from the stream, and incorporate it into
+// the query's internal state machine representation. For nested patterns,
+// this function calls itself recursively.
+//
+// The caller is responsible for passing in a dedicated CaptureQuantifiers.
+// These should not be shared between different calls to ts_query__parse_pattern!
+static TSQueryError ts_query__parse_pattern(
+  TSQuery *self,
+  Stream *stream,
+  uint32_t depth,
+  bool is_immediate,
+  CaptureQuantifiers *capture_quantifiers
+) {
+  if (stream->next == 0) return TSQueryErrorSyntax;
+  if (stream->next == ')' || stream->next == ']') return PARENT_DONE;
+
+  const uint32_t starting_step_index = self->steps.size;
+
+  // Store the byte offset of each step in the query.
+  if (
+    self->step_offsets.size == 0 ||
+    array_back(&self->step_offsets)->step_index != starting_step_index
+  ) {
+    array_push(&self->step_offsets, ((StepOffset) {
+      .step_index = starting_step_index,
+      .byte_offset = stream_offset(stream),
+    }));
+  }
+
+  // An open bracket is the start of an alternation.
+  if (stream->next == '[') {
+    stream_advance(stream);
+    stream_skip_whitespace(stream);
+
+    // Parse each branch, and add a placeholder step in between the branches.
+    Array(uint32_t) branch_step_indices = array_new();
+    CaptureQuantifiers branch_capture_quantifiers = capture_quantifiers_new();
+    for (;;) {
+      uint32_t start_index = self->steps.size;
+      TSQueryError e = ts_query__parse_pattern(
+        self,
+        stream,
+        depth,
+        is_immediate,
+        &branch_capture_quantifiers
+      );
+
+      if (e == PARENT_DONE) {
+        if (stream->next == ']' && branch_step_indices.size > 0) {
+          stream_advance(stream);
+          break;
+        }
+        e = TSQueryErrorSyntax;
+      }
+      if (e) {
+        capture_quantifiers_delete(&branch_capture_quantifiers);
+        array_delete(&branch_step_indices);
+        return e;
+      }
+
+      if (start_index == starting_step_index) {
+        capture_quantifiers_replace(capture_quantifiers, &branch_capture_quantifiers);
+      } else {
+        capture_quantifiers_join_all(capture_quantifiers, &branch_capture_quantifiers);
+      }
+
+      array_push(&branch_step_indices, start_index);
+      array_push(&self->steps, query_step__new(0, depth, false));
+      capture_quantifiers_clear(&branch_capture_quantifiers);
+    }
+    (void)array_pop(&self->steps);
+
+    // For all of the branches except for the last one, add the subsequent branch as an
+    // alternative, and link the end of the branch to the current end of the steps.
+    for (unsigned i = 0; i < branch_step_indices.size - 1; i++) {
+      uint32_t step_index = branch_step_indices.contents[i];
+      uint32_t next_step_index = branch_step_indices.contents[i + 1];
+      QueryStep *start_step = &self->steps.contents[step_index];
+      QueryStep *end_step = &self->steps.contents[next_step_index - 1];
+      start_step->alternative_index = next_step_index;
+      end_step->alternative_index = self->steps.size;
+      end_step->is_dead_end = true;
+    }
+
+    capture_quantifiers_delete(&branch_capture_quantifiers);
+    array_delete(&branch_step_indices);
+  }
+
+  // An open parenthesis can be the start of three possible constructs:
+  // * A grouped sequence
+  // * A predicate
+  // * A named node
+  else if (stream->next == '(') {
+    stream_advance(stream);
+    stream_skip_whitespace(stream);
+
+    // If this parenthesis is followed by a node, then it represents a grouped sequence.
+    if (stream->next == '(' || stream->next == '"' || stream->next == '[') {
+      bool child_is_immediate = is_immediate;
+      CaptureQuantifiers child_capture_quantifiers = capture_quantifiers_new();
+      for (;;) {
+        if (stream->next == '.') {
+          child_is_immediate = true;
+          stream_advance(stream);
+          stream_skip_whitespace(stream);
+        }
+        TSQueryError e = ts_query__parse_pattern(
+          self,
+          stream,
+          depth,
+          child_is_immediate,
+          &child_capture_quantifiers
+        );
+        if (e == PARENT_DONE) {
+          if (stream->next == ')') {
+            stream_advance(stream);
+            break;
+          }
+          e = TSQueryErrorSyntax;
+        }
+        if (e) {
+          capture_quantifiers_delete(&child_capture_quantifiers);
+          return e;
+        }
+
+        capture_quantifiers_add_all(capture_quantifiers, &child_capture_quantifiers);
+        capture_quantifiers_clear(&child_capture_quantifiers);
+        child_is_immediate = false;
+      }
+
+      capture_quantifiers_delete(&child_capture_quantifiers);
+    }
+
+    // A dot/pound character indicates the start of a predicate.
+    else if (stream->next == '.' || stream->next == '#') {
+      stream_advance(stream);
+      return ts_query__parse_predicate(self, stream);
+    }
+
+    // Otherwise, this parenthesis is the start of a named node.
+    else {
+      TSSymbol symbol;
+
+      // Parse a normal node name
+      if (stream_is_ident_start(stream)) {
+        const char *node_name = stream->input;
+        stream_scan_identifier(stream);
+        uint32_t length = (uint32_t)(stream->input - node_name);
+
+        // Parse the wildcard symbol
+        if (length == 1 && node_name[0] == '_') {
+          symbol = WILDCARD_SYMBOL;
+        }
+
+        else {
+          symbol = ts_language_symbol_for_name(
+            self->language,
+            node_name,
+            length,
+            true
+          );
+          if (!symbol) {
+            stream_reset(stream, node_name);
+            return TSQueryErrorNodeType;
+          }
+        }
+      } else {
+        return TSQueryErrorSyntax;
+      }
+
+      // Add a step for the node.
+      array_push(&self->steps, query_step__new(symbol, depth, is_immediate));
+      QueryStep *step = array_back(&self->steps);
+      if (ts_language_symbol_metadata(self->language, symbol).supertype) {
+        step->supertype_symbol = step->symbol;
+        step->symbol = WILDCARD_SYMBOL;
+      }
+      if (symbol == WILDCARD_SYMBOL) {
+        step->is_named = true;
+      }
+
+      stream_skip_whitespace(stream);
+
+      if (stream->next == '/') {
+        stream_advance(stream);
+        if (!stream_is_ident_start(stream)) {
+          return TSQueryErrorSyntax;
+        }
+
+        const char *node_name = stream->input;
+        stream_scan_identifier(stream);
+        uint32_t length = (uint32_t)(stream->input - node_name);
+
+        step->symbol = ts_language_symbol_for_name(
+          self->language,
+          node_name,
+          length,
+          true
+        );
+        if (!step->symbol) {
+          stream_reset(stream, node_name);
+          return TSQueryErrorNodeType;
+        }
+
+        stream_skip_whitespace(stream);
+      }
+
+      // Parse the child patterns
+      bool child_is_immediate = false;
+      uint16_t last_child_step_index = 0;
+      uint16_t negated_field_count = 0;
+      TSFieldId negated_field_ids[MAX_NEGATED_FIELD_COUNT];
+      CaptureQuantifiers child_capture_quantifiers = capture_quantifiers_new();
+      for (;;) {
+        // Parse a negated field assertion
+        if (stream->next == '!') {
+          stream_advance(stream);
+          stream_skip_whitespace(stream);
+          if (!stream_is_ident_start(stream)) {
+            capture_quantifiers_delete(&child_capture_quantifiers);
+            return TSQueryErrorSyntax;
+          }
+          const char *field_name = stream->input;
+          stream_scan_identifier(stream);
+          uint32_t length = (uint32_t)(stream->input - field_name);
+          stream_skip_whitespace(stream);
+
+          TSFieldId field_id = ts_language_field_id_for_name(
+            self->language,
+            field_name,
+            length
+          );
+          if (!field_id) {
+            stream->input = field_name;
+            capture_quantifiers_delete(&child_capture_quantifiers);
+            return TSQueryErrorField;
+          }
+
+          // Keep the field ids sorted.
+          if (negated_field_count < MAX_NEGATED_FIELD_COUNT) {
+            negated_field_ids[negated_field_count] = field_id;
+            negated_field_count++;
+          }
+
+          continue;
+        }
+
+        // Parse a sibling anchor
+        if (stream->next == '.') {
+          child_is_immediate = true;
+          stream_advance(stream);
+          stream_skip_whitespace(stream);
+        }
+
+        uint16_t step_index = self->steps.size;
+        TSQueryError e = ts_query__parse_pattern(
+          self,
+          stream,
+          depth + 1,
+          child_is_immediate,
+          &child_capture_quantifiers
+        );
+        if (e == PARENT_DONE) {
+          if (stream->next == ')') {
+            if (child_is_immediate) {
+              if (last_child_step_index == 0) {
+                capture_quantifiers_delete(&child_capture_quantifiers);
+                return TSQueryErrorSyntax;
+              }
+              self->steps.contents[last_child_step_index].is_last_child = true;
+            }
+
+            if (negated_field_count) {
+              ts_query__add_negated_fields(
+                self,
+                starting_step_index,
+                negated_field_ids,
+                negated_field_count
+              );
+            }
+
+            stream_advance(stream);
+            break;
+          }
+          e = TSQueryErrorSyntax;
+        }
+        if (e) {
+          capture_quantifiers_delete(&child_capture_quantifiers);
+          return e;
+        }
+
+        capture_quantifiers_add_all(capture_quantifiers, &child_capture_quantifiers);
+
+        last_child_step_index = step_index;
+        child_is_immediate = false;
+        capture_quantifiers_clear(&child_capture_quantifiers);
+      }
+      capture_quantifiers_delete(&child_capture_quantifiers);
+    }
+  }
+
+  // Parse a wildcard pattern
+  else if (stream->next == '_') {
+    stream_advance(stream);
+    stream_skip_whitespace(stream);
+
+    // Add a step that matches any kind of node
+    array_push(&self->steps, query_step__new(WILDCARD_SYMBOL, depth, is_immediate));
+  }
+
+  // Parse a double-quoted anonymous leaf node expression
+  else if (stream->next == '"') {
+    const char *string_start = stream->input;
+    TSQueryError e = ts_query__parse_string_literal(self, stream);
+    if (e) return e;
+
+    // Add a step for the node
+    TSSymbol symbol = ts_language_symbol_for_name(
+      self->language,
+      self->string_buffer.contents,
+      self->string_buffer.size,
+      false
+    );
+    if (!symbol) {
+      stream_reset(stream, string_start + 1);
+      return TSQueryErrorNodeType;
+    }
+    array_push(&self->steps, query_step__new(symbol, depth, is_immediate));
+  }
+
+  // Parse a field-prefixed pattern
+  else if (stream_is_ident_start(stream)) {
+    // Parse the field name
+    const char *field_name = stream->input;
+    stream_scan_identifier(stream);
+    uint32_t length = (uint32_t)(stream->input - field_name);
+    stream_skip_whitespace(stream);
+
+    if (stream->next != ':') {
+      stream_reset(stream, field_name);
+      return TSQueryErrorSyntax;
+    }
+    stream_advance(stream);
+    stream_skip_whitespace(stream);
+
+    // Parse the pattern
+    CaptureQuantifiers field_capture_quantifiers = capture_quantifiers_new();
+    TSQueryError e = ts_query__parse_pattern(
+      self,
+      stream,
+      depth,
+      is_immediate,
+      &field_capture_quantifiers
+    );
+    if (e) {
+      capture_quantifiers_delete(&field_capture_quantifiers);
+      if (e == PARENT_DONE) e = TSQueryErrorSyntax;
+      return e;
+    }
+
+    // Add the field name to the first step of the pattern
+    TSFieldId field_id = ts_language_field_id_for_name(
+      self->language,
+      field_name,
+      length
+    );
+    if (!field_id) {
+      stream->input = field_name;
+      return TSQueryErrorField;
+    }
+
+    uint32_t step_index = starting_step_index;
+    QueryStep *step = &self->steps.contents[step_index];
+    for (;;) {
+      step->field = field_id;
+      if (
+        step->alternative_index != NONE &&
+        step->alternative_index > step_index &&
+        step->alternative_index < self->steps.size
+      ) {
+        step_index = step->alternative_index;
+        step = &self->steps.contents[step_index];
+      } else {
+        break;
+      }
+    }
+
+    capture_quantifiers_add_all(capture_quantifiers, &field_capture_quantifiers);
+    capture_quantifiers_delete(&field_capture_quantifiers);
+  }
+
+  else {
+    return TSQueryErrorSyntax;
+  }
+
+  stream_skip_whitespace(stream);
+
+  // Parse suffixes modifiers for this pattern
+  TSQuantifier quantifier = TSQuantifierOne;
+  for (;;) {
+    // Parse the one-or-more operator.
+    if (stream->next == '+') {
+      quantifier = quantifier_join(TSQuantifierOneOrMore, quantifier);
+
+      stream_advance(stream);
+      stream_skip_whitespace(stream);
+
+      QueryStep repeat_step = query_step__new(WILDCARD_SYMBOL, depth, false);
+      repeat_step.alternative_index = starting_step_index;
+      repeat_step.is_pass_through = true;
+      repeat_step.alternative_is_immediate = true;
+      array_push(&self->steps, repeat_step);
+    }
+
+    // Parse the zero-or-more repetition operator.
+    else if (stream->next == '*') {
+      quantifier = quantifier_join(TSQuantifierZeroOrMore, quantifier);
+
+      stream_advance(stream);
+      stream_skip_whitespace(stream);
+
+      QueryStep repeat_step = query_step__new(WILDCARD_SYMBOL, depth, false);
+      repeat_step.alternative_index = starting_step_index;
+      repeat_step.is_pass_through = true;
+      repeat_step.alternative_is_immediate = true;
+      array_push(&self->steps, repeat_step);
+
+      // Stop when `step->alternative_index` is `NONE` or it points to
+      // `repeat_step` or beyond. Note that having just been pushed,
+      // `repeat_step` occupies slot `self->steps.size - 1`.
+      QueryStep *step = &self->steps.contents[starting_step_index];
+      while (step->alternative_index != NONE && step->alternative_index < self->steps.size - 1) {
+        step = &self->steps.contents[step->alternative_index];
+      }
+      step->alternative_index = self->steps.size;
+    }
+
+    // Parse the optional operator.
+    else if (stream->next == '?') {
+      quantifier = quantifier_join(TSQuantifierZeroOrOne, quantifier);
+
+      stream_advance(stream);
+      stream_skip_whitespace(stream);
+
+      QueryStep *step = &self->steps.contents[starting_step_index];
+      while (step->alternative_index != NONE && step->alternative_index < self->steps.size) {
+        step = &self->steps.contents[step->alternative_index];
+      }
+      step->alternative_index = self->steps.size;
+    }
+
+    // Parse an '@'-prefixed capture pattern
+    else if (stream->next == '@') {
+      stream_advance(stream);
+      if (!stream_is_ident_start(stream)) return TSQueryErrorSyntax;
+      const char *capture_name = stream->input;
+      stream_scan_identifier(stream);
+      uint32_t length = (uint32_t)(stream->input - capture_name);
+      stream_skip_whitespace(stream);
+
+      // Add the capture id to the first step of the pattern
+      uint16_t capture_id = symbol_table_insert_name(
+        &self->captures,
+        capture_name,
+        length
+      );
+
+      // Add the capture quantifier
+      capture_quantifiers_add_for_id(capture_quantifiers, capture_id, TSQuantifierOne);
+
+      uint32_t step_index = starting_step_index;
+      for (;;) {
+        QueryStep *step = &self->steps.contents[step_index];
+        query_step__add_capture(step, capture_id);
+        if (
+          step->alternative_index != NONE &&
+          step->alternative_index > step_index &&
+          step->alternative_index < self->steps.size
+        ) {
+          step_index = step->alternative_index;
+        } else {
+          break;
+        }
+      }
+    }
+
+    // No more suffix modifiers
+    else {
+      break;
+    }
+  }
+
+  capture_quantifiers_mul(capture_quantifiers, quantifier);
+
+  return 0;
+}
+
+TSQuery *ts_query_new(
+  const TSLanguage *language,
+  const char *source,
+  uint32_t source_len,
+  uint32_t *error_offset,
+  TSQueryError *error_type
+) {
+  if (
+    !language ||
+    language->version > TREE_SITTER_LANGUAGE_VERSION ||
+    language->version < TREE_SITTER_MIN_COMPATIBLE_LANGUAGE_VERSION
+  ) {
+    *error_type = TSQueryErrorLanguage;
+    return NULL;
+  }
+
+  TSQuery *self = ts_malloc(sizeof(TSQuery));
+  *self = (TSQuery) {
+    .steps = array_new(),
+    .pattern_map = array_new(),
+    .captures = symbol_table_new(),
+    .capture_quantifiers = array_new(),
+    .predicate_values = symbol_table_new(),
+    .predicate_steps = array_new(),
+    .patterns = array_new(),
+    .step_offsets = array_new(),
+    .string_buffer = array_new(),
+    .negated_fields = array_new(),
+    .repeat_symbols_with_rootless_patterns = array_new(),
+    .wildcard_root_pattern_count = 0,
+    .language = ts_language_copy(language),
+  };
+
+  array_push(&self->negated_fields, 0);
+
+  // Parse all of the S-expressions in the given string.
+  Stream stream = stream_new(source, source_len);
+  stream_skip_whitespace(&stream);
+  while (stream.input < stream.end) {
+    uint32_t pattern_index = self->patterns.size;
+    uint32_t start_step_index = self->steps.size;
+    uint32_t start_predicate_step_index = self->predicate_steps.size;
+    array_push(&self->patterns, ((QueryPattern) {
+      .steps = (Slice) {.offset = start_step_index},
+      .predicate_steps = (Slice) {.offset = start_predicate_step_index},
+      .start_byte = stream_offset(&stream),
+      .is_non_local = false,
+    }));
+    CaptureQuantifiers capture_quantifiers = capture_quantifiers_new();
+    *error_type = ts_query__parse_pattern(self, &stream, 0, false, &capture_quantifiers);
+    array_push(&self->steps, query_step__new(0, PATTERN_DONE_MARKER, false));
+
+    QueryPattern *pattern = array_back(&self->patterns);
+    pattern->steps.length = self->steps.size - start_step_index;
+    pattern->predicate_steps.length = self->predicate_steps.size - start_predicate_step_index;
+
+    // If any pattern could not be parsed, then report the error information
+    // and terminate.
+    if (*error_type) {
+      if (*error_type == PARENT_DONE) *error_type = TSQueryErrorSyntax;
+      *error_offset = stream_offset(&stream);
+      capture_quantifiers_delete(&capture_quantifiers);
+      ts_query_delete(self);
+      return NULL;
+    }
+
+    // Maintain a list of capture quantifiers for each pattern
+    array_push(&self->capture_quantifiers, capture_quantifiers);
+
+    // Maintain a map that can look up patterns for a given root symbol.
+    uint16_t wildcard_root_alternative_index = NONE;
+    for (;;) {
+      QueryStep *step = &self->steps.contents[start_step_index];
+
+      // If a pattern has a wildcard at its root, but it has a non-wildcard child,
+      // then optimize the matching process by skipping matching the wildcard.
+      // Later, during the matching process, the query cursor will check that
+      // there is a parent node, and capture it if necessary.
+      if (step->symbol == WILDCARD_SYMBOL && step->depth == 0 && !step->field) {
+        QueryStep *second_step = &self->steps.contents[start_step_index + 1];
+        if (second_step->symbol != WILDCARD_SYMBOL && second_step->depth == 1) {
+          wildcard_root_alternative_index = step->alternative_index;
+          start_step_index += 1;
+          step = second_step;
+        }
+      }
+
+      // Determine whether the pattern has a single root node. This affects
+      // decisions about whether or not to start matching the pattern when
+      // a query cursor has a range restriction or when immediately within an
+      // error node.
+      uint32_t start_depth = step->depth;
+      bool is_rooted = start_depth == 0;
+      for (uint32_t step_index = start_step_index + 1; step_index < self->steps.size; step_index++) {
+        QueryStep *child_step = &self->steps.contents[step_index];
+        if (child_step->is_dead_end) break;
+        if (child_step->depth == start_depth) {
+          is_rooted = false;
+          break;
+        }
+      }
+
+      ts_query__pattern_map_insert(self, step->symbol, (PatternEntry) {
+        .step_index = start_step_index,
+        .pattern_index = pattern_index,
+        .is_rooted = is_rooted
+      });
+      if (step->symbol == WILDCARD_SYMBOL) {
+        self->wildcard_root_pattern_count++;
+      }
+
+      // If there are alternatives or options at the root of the pattern,
+      // then add multiple entries to the pattern map.
+      if (step->alternative_index != NONE) {
+        start_step_index = step->alternative_index;
+      } else if (wildcard_root_alternative_index != NONE) {
+        start_step_index = wildcard_root_alternative_index;
+        wildcard_root_alternative_index = NONE;
+      } else {
+        break;
+      }
+    }
+  }
+
+  if (!ts_query__analyze_patterns(self, error_offset)) {
+    *error_type = TSQueryErrorStructure;
+    ts_query_delete(self);
+    return NULL;
+  }
+
+  array_delete(&self->string_buffer);
+  return self;
+}
+
+void ts_query_delete(TSQuery *self) {
+  if (self) {
+    array_delete(&self->steps);
+    array_delete(&self->pattern_map);
+    array_delete(&self->predicate_steps);
+    array_delete(&self->patterns);
+    array_delete(&self->step_offsets);
+    array_delete(&self->string_buffer);
+    array_delete(&self->negated_fields);
+    array_delete(&self->repeat_symbols_with_rootless_patterns);
+    ts_language_delete(self->language);
+    symbol_table_delete(&self->captures);
+    symbol_table_delete(&self->predicate_values);
+    for (uint32_t index = 0; index < self->capture_quantifiers.size; index++) {
+      CaptureQuantifiers *capture_quantifiers = array_get(&self->capture_quantifiers, index);
+      capture_quantifiers_delete(capture_quantifiers);
+    }
+    array_delete(&self->capture_quantifiers);
+    ts_free(self);
+  }
+}
+
+uint32_t ts_query_pattern_count(const TSQuery *self) {
+  return self->patterns.size;
+}
+
+uint32_t ts_query_capture_count(const TSQuery *self) {
+  return self->captures.slices.size;
+}
+
+uint32_t ts_query_string_count(const TSQuery *self) {
+  return self->predicate_values.slices.size;
+}
+
+const char *ts_query_capture_name_for_id(
+  const TSQuery *self,
+  uint32_t index,
+  uint32_t *length
+) {
+  return symbol_table_name_for_id(&self->captures, index, length);
+}
+
+TSQuantifier ts_query_capture_quantifier_for_id(
+  const TSQuery *self,
+  uint32_t pattern_index,
+  uint32_t capture_index
+) {
+  CaptureQuantifiers *capture_quantifiers = array_get(&self->capture_quantifiers, pattern_index);
+  return capture_quantifier_for_id(capture_quantifiers, capture_index);
+}
+
+const char *ts_query_string_value_for_id(
+  const TSQuery *self,
+  uint32_t index,
+  uint32_t *length
+) {
+  return symbol_table_name_for_id(&self->predicate_values, index, length);
+}
+
+const TSQueryPredicateStep *ts_query_predicates_for_pattern(
+  const TSQuery *self,
+  uint32_t pattern_index,
+  uint32_t *step_count
+) {
+  Slice slice = self->patterns.contents[pattern_index].predicate_steps;
+  *step_count = slice.length;
+  if (self->predicate_steps.contents == NULL) {
+    return NULL;
+  }
+  return &self->predicate_steps.contents[slice.offset];
+}
+
+uint32_t ts_query_start_byte_for_pattern(
+  const TSQuery *self,
+  uint32_t pattern_index
+) {
+  return self->patterns.contents[pattern_index].start_byte;
+}
+
+bool ts_query_is_pattern_rooted(
+  const TSQuery *self,
+  uint32_t pattern_index
+) {
+  for (unsigned i = 0; i < self->pattern_map.size; i++) {
+    PatternEntry *entry = &self->pattern_map.contents[i];
+    if (entry->pattern_index == pattern_index) {
+      if (!entry->is_rooted) return false;
+    }
+  }
+  return true;
+}
+
+bool ts_query_is_pattern_non_local(
+  const TSQuery *self,
+  uint32_t pattern_index
+) {
+  if (pattern_index < self->patterns.size) {
+    return self->patterns.contents[pattern_index].is_non_local;
+  } else {
+    return false;
+  }
+}
+
+bool ts_query_is_pattern_guaranteed_at_step(
+  const TSQuery *self,
+  uint32_t byte_offset
+) {
+  uint32_t step_index = UINT32_MAX;
+  for (unsigned i = 0; i < self->step_offsets.size; i++) {
+    StepOffset *step_offset = &self->step_offsets.contents[i];
+    if (step_offset->byte_offset > byte_offset) break;
+    step_index = step_offset->step_index;
+  }
+  if (step_index < self->steps.size) {
+    return self->steps.contents[step_index].root_pattern_guaranteed;
+  } else {
+    return false;
+  }
+}
+
+bool ts_query__step_is_fallible(
+  const TSQuery *self,
+  uint16_t step_index
+) {
+  assert((uint32_t)step_index + 1 < self->steps.size);
+  QueryStep *step = &self->steps.contents[step_index];
+  QueryStep *next_step = &self->steps.contents[step_index + 1];
+  return (
+    next_step->depth != PATTERN_DONE_MARKER &&
+    next_step->depth > step->depth &&
+    !next_step->parent_pattern_guaranteed
+  );
+}
+
+void ts_query_disable_capture(
+  TSQuery *self,
+  const char *name,
+  uint32_t length
+) {
+  // Remove capture information for any pattern step that previously
+  // captured with the given name.
+  int id = symbol_table_id_for_name(&self->captures, name, length);
+  if (id != -1) {
+    for (unsigned i = 0; i < self->steps.size; i++) {
+      QueryStep *step = &self->steps.contents[i];
+      query_step__remove_capture(step, id);
+    }
+  }
+}
+
+void ts_query_disable_pattern(
+  TSQuery *self,
+  uint32_t pattern_index
+) {
+  // Remove the given pattern from the pattern map. Its steps will still
+  // be in the `steps` array, but they will never be read.
+  for (unsigned i = 0; i < self->pattern_map.size; i++) {
+    PatternEntry *pattern = &self->pattern_map.contents[i];
+    if (pattern->pattern_index == pattern_index) {
+      array_erase(&self->pattern_map, i);
+      i--;
+    }
+  }
+}
+
+/***************
+ * QueryCursor
+ ***************/
+
+TSQueryCursor *ts_query_cursor_new(void) {
+  TSQueryCursor *self = ts_malloc(sizeof(TSQueryCursor));
+  *self = (TSQueryCursor) {
+    .did_exceed_match_limit = false,
+    .ascending = false,
+    .halted = false,
+    .states = array_new(),
+    .finished_states = array_new(),
+    .capture_list_pool = capture_list_pool_new(),
+    .start_byte = 0,
+    .end_byte = UINT32_MAX,
+    .start_point = {0, 0},
+    .end_point = POINT_MAX,
+    .max_start_depth = UINT32_MAX,
+  };
+  array_reserve(&self->states, 8);
+  array_reserve(&self->finished_states, 8);
+  return self;
+}
+
+void ts_query_cursor_delete(TSQueryCursor *self) {
+  array_delete(&self->states);
+  array_delete(&self->finished_states);
+  ts_tree_cursor_delete(&self->cursor);
+  capture_list_pool_delete(&self->capture_list_pool);
+  ts_free(self);
+}
+
+bool ts_query_cursor_did_exceed_match_limit(const TSQueryCursor *self) {
+  return self->did_exceed_match_limit;
+}
+
+uint32_t ts_query_cursor_match_limit(const TSQueryCursor *self) {
+  return self->capture_list_pool.max_capture_list_count;
+}
+
+void ts_query_cursor_set_match_limit(TSQueryCursor *self, uint32_t limit) {
+  self->capture_list_pool.max_capture_list_count = limit;
+}
+
+#ifdef DEBUG_EXECUTE_QUERY
+#define LOG(...) fprintf(stderr, __VA_ARGS__)
+#else
+#define LOG(...)
+#endif
+
+void ts_query_cursor_exec(
+  TSQueryCursor *self,
+  const TSQuery *query,
+  TSNode node
+) {
+  if  (query) {
+    LOG("query steps:\n");
+    for (unsigned i = 0; i < query->steps.size; i++) {
+      QueryStep *step = &query->steps.contents[i];
+      LOG("  %u: {", i);
+      if (step->depth == PATTERN_DONE_MARKER) {
+        LOG("DONE");
+      } else if (step->is_dead_end) {
+        LOG("dead_end");
+      } else if (step->is_pass_through) {
+        LOG("pass_through");
+      } else if (step->symbol != WILDCARD_SYMBOL) {
+        LOG("symbol: %s", query->language->symbol_names[step->symbol]);
+      } else {
+        LOG("symbol: *");
+      }
+      if (step->field) {
+        LOG(", field: %s", query->language->field_names[step->field]);
+      }
+      if (step->alternative_index != NONE) {
+        LOG(", alternative: %u", step->alternative_index);
+      }
+      LOG("},\n");
+    }
+  }
+
+  array_clear(&self->states);
+  array_clear(&self->finished_states);
+  ts_tree_cursor_reset(&self->cursor, node);
+  capture_list_pool_reset(&self->capture_list_pool);
+  self->on_visible_node = true;
+  self->next_state_id = 0;
+  self->depth = 0;
+  self->ascending = false;
+  self->halted = false;
+  self->query = query;
+  self->did_exceed_match_limit = false;
+}
+
+void ts_query_cursor_set_byte_range(
+  TSQueryCursor *self,
+  uint32_t start_byte,
+  uint32_t end_byte
+) {
+  if (end_byte == 0) {
+    end_byte = UINT32_MAX;
+  }
+  self->start_byte = start_byte;
+  self->end_byte = end_byte;
+}
+
+void ts_query_cursor_set_point_range(
+  TSQueryCursor *self,
+  TSPoint start_point,
+  TSPoint end_point
+) {
+  if (end_point.row == 0 && end_point.column == 0) {
+    end_point = POINT_MAX;
+  }
+  self->start_point = start_point;
+  self->end_point = end_point;
+}
+
+// Search through all of the in-progress states, and find the captured
+// node that occurs earliest in the document.
+static bool ts_query_cursor__first_in_progress_capture(
+  TSQueryCursor *self,
+  uint32_t *state_index,
+  uint32_t *byte_offset,
+  uint32_t *pattern_index,
+  bool *root_pattern_guaranteed
+) {
+  bool result = false;
+  *state_index = UINT32_MAX;
+  *byte_offset = UINT32_MAX;
+  *pattern_index = UINT32_MAX;
+  for (unsigned i = 0; i < self->states.size; i++) {
+    QueryState *state = &self->states.contents[i];
+    if (state->dead) continue;
+
+    const CaptureList *captures = capture_list_pool_get(
+      &self->capture_list_pool,
+      state->capture_list_id
+    );
+    if (state->consumed_capture_count >= captures->size) {
+      continue;
+    }
+
+    TSNode node = captures->contents[state->consumed_capture_count].node;
+    if (
+      ts_node_end_byte(node) <= self->start_byte ||
+      point_lte(ts_node_end_point(node), self->start_point)
+    ) {
+      state->consumed_capture_count++;
+      i--;
+      continue;
+    }
+
+    uint32_t node_start_byte = ts_node_start_byte(node);
+    if (
+      !result ||
+      node_start_byte < *byte_offset ||
+      (node_start_byte == *byte_offset && state->pattern_index < *pattern_index)
+    ) {
+      QueryStep *step = &self->query->steps.contents[state->step_index];
+      if (root_pattern_guaranteed) {
+        *root_pattern_guaranteed = step->root_pattern_guaranteed;
+      } else if (step->root_pattern_guaranteed) {
+        continue;
+      }
+
+      result = true;
+      *state_index = i;
+      *byte_offset = node_start_byte;
+      *pattern_index = state->pattern_index;
+    }
+  }
+  return result;
+}
+
+// Determine which node is first in a depth-first traversal
+int ts_query_cursor__compare_nodes(TSNode left, TSNode right) {
+  if (left.id != right.id) {
+    uint32_t left_start = ts_node_start_byte(left);
+    uint32_t right_start = ts_node_start_byte(right);
+    if (left_start < right_start) return -1;
+    if (left_start > right_start) return 1;
+    uint32_t left_node_count = ts_node_end_byte(left);
+    uint32_t right_node_count = ts_node_end_byte(right);
+    if (left_node_count > right_node_count) return -1;
+    if (left_node_count < right_node_count) return 1;
+  }
+  return 0;
+}
+
+// Determine if either state contains a superset of the other state's captures.
+void ts_query_cursor__compare_captures(
+  TSQueryCursor *self,
+  QueryState *left_state,
+  QueryState *right_state,
+  bool *left_contains_right,
+  bool *right_contains_left
+) {
+  const CaptureList *left_captures = capture_list_pool_get(
+    &self->capture_list_pool,
+    left_state->capture_list_id
+  );
+  const CaptureList *right_captures = capture_list_pool_get(
+    &self->capture_list_pool,
+    right_state->capture_list_id
+  );
+  *left_contains_right = true;
+  *right_contains_left = true;
+  unsigned i = 0, j = 0;
+  for (;;) {
+    if (i < left_captures->size) {
+      if (j < right_captures->size) {
+        TSQueryCapture *left = &left_captures->contents[i];
+        TSQueryCapture *right = &right_captures->contents[j];
+        if (left->node.id == right->node.id && left->index == right->index) {
+          i++;
+          j++;
+        } else {
+          switch (ts_query_cursor__compare_nodes(left->node, right->node)) {
+            case -1:
+              *right_contains_left = false;
+              i++;
+              break;
+            case 1:
+              *left_contains_right = false;
+              j++;
+              break;
+            default:
+              *right_contains_left = false;
+              *left_contains_right = false;
+              i++;
+              j++;
+              break;
+          }
+        }
+      } else {
+        *right_contains_left = false;
+        break;
+      }
+    } else {
+      if (j < right_captures->size) {
+        *left_contains_right = false;
+      }
+      break;
+    }
+  }
+}
+
+static void ts_query_cursor__add_state(
+  TSQueryCursor *self,
+  const PatternEntry *pattern
+) {
+  QueryStep *step = &self->query->steps.contents[pattern->step_index];
+  uint32_t start_depth = self->depth - step->depth;
+
+  // Keep the states array in ascending order of start_depth and pattern_index,
+  // so that it can be processed more efficiently elsewhere. Usually, there is
+  // no work to do here because of two facts:
+  // * States with lower start_depth are naturally added first due to the
+  //   order in which nodes are visited.
+  // * Earlier patterns are naturally added first because of the ordering of the
+  //   pattern_map data structure that's used to initiate matches.
+  //
+  // This loop is only needed in cases where two conditions hold:
+  // * A pattern consists of more than one sibling node, so that its states
+  //   remain in progress after exiting the node that started the match.
+  // * The first node in the pattern matches against multiple nodes at the
+  //   same depth.
+  //
+  // An example of this is the pattern '((comment)* (function))'. If multiple
+  // `comment` nodes appear in a row, then we may initiate a new state for this
+  // pattern while another state for the same pattern is already in progress.
+  // If there are multiple patterns like this in a query, then this loop will
+  // need to execute in order to keep the states ordered by pattern_index.
+  uint32_t index = self->states.size;
+  while (index > 0) {
+    QueryState *prev_state = &self->states.contents[index - 1];
+    if (prev_state->start_depth < start_depth) break;
+    if (prev_state->start_depth == start_depth) {
+      // Avoid inserting an unnecessary duplicate state, which would be
+      // immediately pruned by the longest-match criteria.
+      if (
+        prev_state->pattern_index == pattern->pattern_index &&
+        prev_state->step_index == pattern->step_index
+      ) return;
+      if (prev_state->pattern_index <= pattern->pattern_index) break;
+    }
+    index--;
+  }
+
+  LOG(
+    "  start state. pattern:%u, step:%u\n",
+    pattern->pattern_index,
+    pattern->step_index
+  );
+  array_insert(&self->states, index, ((QueryState) {
+    .id = UINT32_MAX,
+    .capture_list_id = NONE,
+    .step_index = pattern->step_index,
+    .pattern_index = pattern->pattern_index,
+    .start_depth = start_depth,
+    .consumed_capture_count = 0,
+    .seeking_immediate_match = true,
+    .has_in_progress_alternatives = false,
+    .needs_parent = step->depth == 1,
+    .dead = false,
+  }));
+}
+
+// Acquire a capture list for this state. If there are no capture lists left in the
+// pool, this will steal the capture list from another existing state, and mark that
+// other state as 'dead'.
+static CaptureList *ts_query_cursor__prepare_to_capture(
+  TSQueryCursor *self,
+  QueryState *state,
+  unsigned state_index_to_preserve
+) {
+  if (state->capture_list_id == NONE) {
+    state->capture_list_id = capture_list_pool_acquire(&self->capture_list_pool);
+
+    // If there are no capture lists left in the pool, then terminate whichever
+    // state has captured the earliest node in the document, and steal its
+    // capture list.
+    if (state->capture_list_id == NONE) {
+      self->did_exceed_match_limit = true;
+      uint32_t state_index, byte_offset, pattern_index;
+      if (
+        ts_query_cursor__first_in_progress_capture(
+          self,
+          &state_index,
+          &byte_offset,
+          &pattern_index,
+          NULL
+        ) &&
+        state_index != state_index_to_preserve
+      ) {
+        LOG(
+          "  abandon state. index:%u, pattern:%u, offset:%u.\n",
+          state_index, pattern_index, byte_offset
+        );
+        QueryState *other_state = &self->states.contents[state_index];
+        state->capture_list_id = other_state->capture_list_id;
+        other_state->capture_list_id = NONE;
+        other_state->dead = true;
+        CaptureList *list = capture_list_pool_get_mut(
+          &self->capture_list_pool,
+          state->capture_list_id
+        );
+        array_clear(list);
+        return list;
+      } else {
+        LOG("  ran out of capture lists");
+        return NULL;
+      }
+    }
+  }
+  return capture_list_pool_get_mut(&self->capture_list_pool, state->capture_list_id);
+}
+
+static void ts_query_cursor__capture(
+  TSQueryCursor *self,
+  QueryState *state,
+  QueryStep *step,
+  TSNode node
+) {
+  if (state->dead) return;
+  CaptureList *capture_list = ts_query_cursor__prepare_to_capture(self, state, UINT32_MAX);
+  if (!capture_list) {
+    state->dead = true;
+    return;
+  }
+
+  for (unsigned j = 0; j < MAX_STEP_CAPTURE_COUNT; j++) {
+    uint16_t capture_id = step->capture_ids[j];
+    if (step->capture_ids[j] == NONE) break;
+    array_push(capture_list, ((TSQueryCapture) { node, capture_id }));
+    LOG(
+      "  capture node. type:%s, pattern:%u, capture_id:%u, capture_count:%u\n",
+      ts_node_type(node),
+      state->pattern_index,
+      capture_id,
+      capture_list->size
+    );
+  }
+}
+
+// Duplicate the given state and insert the newly-created state immediately after
+// the given state in the `states` array. Ensures that the given state reference is
+// still valid, even if the states array is reallocated.
+static QueryState *ts_query_cursor__copy_state(
+  TSQueryCursor *self,
+  QueryState **state_ref
+) {
+  const QueryState *state = *state_ref;
+  uint32_t state_index = (uint32_t)(state - self->states.contents);
+  QueryState copy = *state;
+  copy.capture_list_id = NONE;
+
+  // If the state has captures, copy its capture list.
+  if (state->capture_list_id != NONE) {
+    CaptureList *new_captures = ts_query_cursor__prepare_to_capture(self, &copy, state_index);
+    if (!new_captures) return NULL;
+    const CaptureList *old_captures = capture_list_pool_get(
+      &self->capture_list_pool,
+      state->capture_list_id
+    );
+    array_push_all(new_captures, old_captures);
+  }
+
+  array_insert(&self->states, state_index + 1, copy);
+  *state_ref = &self->states.contents[state_index];
+  return &self->states.contents[state_index + 1];
+}
+
+static inline bool ts_query_cursor__should_descend(
+  TSQueryCursor *self,
+  bool node_intersects_range
+) {
+
+  if (node_intersects_range && self->depth < self->max_start_depth) {
+    return true;
+  }
+
+  // If there are in-progress matches whose remaining steps occur
+  // deeper in the tree, then descend.
+  for (unsigned i = 0; i < self->states.size; i++) {
+    QueryState *state = &self->states.contents[i];;
+    QueryStep *next_step = &self->query->steps.contents[state->step_index];
+    if (
+      next_step->depth != PATTERN_DONE_MARKER &&
+      state->start_depth + next_step->depth > self->depth
+    ) {
+      return true;
+    }
+  }
+
+  if (self->depth >= self->max_start_depth) {
+    return false;
+  }
+
+  // If the current node is hidden, then a non-rooted pattern might match
+  // one if its roots inside of this node, and match another of its roots
+  // as part of a sibling node, so we may need to descend.
+  if (!self->on_visible_node) {
+    // Descending into a repetition node outside of the range can be
+    // expensive, because these nodes can have many visible children.
+    // Avoid descending into repetition nodes unless we have already
+    // determined that this query can match rootless patterns inside
+    // of this type of repetition node.
+    Subtree subtree = ts_tree_cursor_current_subtree(&self->cursor);
+    if (ts_subtree_is_repetition(subtree)) {
+      bool exists;
+      uint32_t index;
+      array_search_sorted_by(
+        &self->query->repeat_symbols_with_rootless_patterns,,
+        ts_subtree_symbol(subtree),
+        &index,
+        &exists
+      );
+      return exists;
+    }
+
+    return true;
+  }
+
+  return false;
+}
+
+// Walk the tree, processing patterns until at least one pattern finishes,
+// If one or more patterns finish, return `true` and store their states in the
+// `finished_states` array. Multiple patterns can finish on the same node. If
+// there are no more matches, return `false`.
+static inline bool ts_query_cursor__advance(
+  TSQueryCursor *self,
+  bool stop_on_definite_step
+) {
+  bool did_match = false;
+  for (;;) {
+    if (self->halted) {
+      while (self->states.size > 0) {
+        QueryState state = array_pop(&self->states);
+        capture_list_pool_release(
+          &self->capture_list_pool,
+          state.capture_list_id
+        );
+      }
+    }
+
+    if (did_match || self->halted) return did_match;
+
+    // Exit the current node.
+    if (self->ascending) {
+      if (self->on_visible_node) {
+        LOG(
+          "leave node. depth:%u, type:%s\n",
+          self->depth,
+          ts_node_type(ts_tree_cursor_current_node(&self->cursor))
+        );
+
+        // After leaving a node, remove any states that cannot make further progress.
+        uint32_t deleted_count = 0;
+        for (unsigned i = 0, n = self->states.size; i < n; i++) {
+          QueryState *state = &self->states.contents[i];
+          QueryStep *step = &self->query->steps.contents[state->step_index];
+
+          // If a state completed its pattern inside of this node, but was deferred from finishing
+          // in order to search for longer matches, mark it as finished.
+          if (
+            step->depth == PATTERN_DONE_MARKER &&
+            (state->start_depth > self->depth || self->depth == 0)
+          ) {
+            LOG("  finish pattern %u\n", state->pattern_index);
+            array_push(&self->finished_states, *state);
+            did_match = true;
+            deleted_count++;
+          }
+
+          // If a state needed to match something within this node, then remove that state
+          // as it has failed to match.
+          else if (
+            step->depth != PATTERN_DONE_MARKER &&
+            (uint32_t)state->start_depth + (uint32_t)step->depth > self->depth
+          ) {
+            LOG(
+              "  failed to match. pattern:%u, step:%u\n",
+              state->pattern_index,
+              state->step_index
+            );
+            capture_list_pool_release(
+              &self->capture_list_pool,
+              state->capture_list_id
+            );
+            deleted_count++;
+          }
+
+          else if (deleted_count > 0) {
+            self->states.contents[i - deleted_count] = *state;
+          }
+        }
+        self->states.size -= deleted_count;
+      }
+
+      // Leave this node by stepping to its next sibling or to its parent.
+      switch (ts_tree_cursor_goto_next_sibling_internal(&self->cursor)) {
+        case TreeCursorStepVisible:
+          if (!self->on_visible_node) {
+            self->depth++;
+            self->on_visible_node = true;
+          }
+          self->ascending = false;
+          break;
+        case TreeCursorStepHidden:
+          if (self->on_visible_node) {
+            self->depth--;
+            self->on_visible_node = false;
+          }
+          self->ascending = false;
+          break;
+        default:
+          if (ts_tree_cursor_goto_parent(&self->cursor)) {
+            self->depth--;
+          } else {
+            LOG("halt at root\n");
+            self->halted = true;
+          }
+      }
+    }
+
+    // Enter a new node.
+    else {
+      // Get the properties of the current node.
+      TSNode node = ts_tree_cursor_current_node(&self->cursor);
+      TSNode parent_node = ts_tree_cursor_parent_node(&self->cursor);
+      bool parent_precedes_range = !ts_node_is_null(parent_node) && (
+        ts_node_end_byte(parent_node) <= self->start_byte ||
+        point_lte(ts_node_end_point(parent_node), self->start_point)
+      );
+      bool parent_follows_range = !ts_node_is_null(parent_node) && (
+        ts_node_start_byte(parent_node) >= self->end_byte ||
+        point_gte(ts_node_start_point(parent_node), self->end_point)
+      );
+      bool node_precedes_range = parent_precedes_range || (
+        ts_node_end_byte(node) <= self->start_byte ||
+        point_lte(ts_node_end_point(node), self->start_point)
+      );
+      bool node_follows_range = parent_follows_range || (
+        ts_node_start_byte(node) >= self->end_byte ||
+        point_gte(ts_node_start_point(node), self->end_point)
+      );
+      bool parent_intersects_range = !parent_precedes_range && !parent_follows_range;
+      bool node_intersects_range = !node_precedes_range && !node_follows_range;
+
+      if (self->on_visible_node) {
+        TSSymbol symbol = ts_node_symbol(node);
+        bool is_named = ts_node_is_named(node);
+        bool has_later_siblings;
+        bool has_later_named_siblings;
+        bool can_have_later_siblings_with_this_field;
+        TSFieldId field_id = 0;
+        TSSymbol supertypes[8] = {0};
+        unsigned supertype_count = 8;
+        ts_tree_cursor_current_status(
+          &self->cursor,
+          &field_id,
+          &has_later_siblings,
+          &has_later_named_siblings,
+          &can_have_later_siblings_with_this_field,
+          supertypes,
+          &supertype_count
+        );
+        LOG(
+          "enter node. depth:%u, type:%s, field:%s, row:%u state_count:%u, finished_state_count:%u\n",
+          self->depth,
+          ts_node_type(node),
+          ts_language_field_name_for_id(self->query->language, field_id),
+          ts_node_start_point(node).row,
+          self->states.size,
+          self->finished_states.size
+        );
+
+        bool node_is_error = symbol == ts_builtin_sym_error;
+        bool parent_is_error =
+          !ts_node_is_null(parent_node) &&
+          ts_node_symbol(parent_node) == ts_builtin_sym_error;
+
+        // Add new states for any patterns whose root node is a wildcard.
+        if (!node_is_error) {
+          for (unsigned i = 0; i < self->query->wildcard_root_pattern_count; i++) {
+            PatternEntry *pattern = &self->query->pattern_map.contents[i];
+
+            // If this node matches the first step of the pattern, then add a new
+            // state at the start of this pattern.
+            QueryStep *step = &self->query->steps.contents[pattern->step_index];
+            uint32_t start_depth = self->depth - step->depth;
+            if (
+              (pattern->is_rooted ?
+                node_intersects_range :
+                (parent_intersects_range && !parent_is_error)) &&
+              (!step->field || field_id == step->field) &&
+              (!step->supertype_symbol || supertype_count > 0) &&
+              (start_depth <= self->max_start_depth)
+            ) {
+              ts_query_cursor__add_state(self, pattern);
+            }
+          }
+        }
+
+        // Add new states for any patterns whose root node matches this node.
+        unsigned i;
+        if (ts_query__pattern_map_search(self->query, symbol, &i)) {
+          PatternEntry *pattern = &self->query->pattern_map.contents[i];
+
+          QueryStep *step = &self->query->steps.contents[pattern->step_index];
+          uint32_t start_depth = self->depth - step->depth;
+          do {
+            // If this node matches the first step of the pattern, then add a new
+            // state at the start of this pattern.
+            if (
+              (pattern->is_rooted ?
+                node_intersects_range :
+                (parent_intersects_range && !parent_is_error)) &&
+              (!step->field || field_id == step->field) &&
+              (start_depth <= self->max_start_depth)
+            ) {
+              ts_query_cursor__add_state(self, pattern);
+            }
+
+            // Advance to the next pattern whose root node matches this node.
+            i++;
+            if (i == self->query->pattern_map.size) break;
+            pattern = &self->query->pattern_map.contents[i];
+            step = &self->query->steps.contents[pattern->step_index];
+          } while (step->symbol == symbol);
+        }
+
+        // Update all of the in-progress states with current node.
+        for (unsigned j = 0, copy_count = 0; j < self->states.size; j += 1 + copy_count) {
+          QueryState *state = &self->states.contents[j];
+          QueryStep *step = &self->query->steps.contents[state->step_index];
+          state->has_in_progress_alternatives = false;
+          copy_count = 0;
+
+          // Check that the node matches all of the criteria for the next
+          // step of the pattern.
+          if ((uint32_t)state->start_depth + (uint32_t)step->depth != self->depth) continue;
+
+          // Determine if this node matches this step of the pattern, and also
+          // if this node can have later siblings that match this step of the
+          // pattern.
+          bool node_does_match = false;
+          if (step->symbol == WILDCARD_SYMBOL) {
+            node_does_match = !node_is_error && (is_named || !step->is_named);
+          } else {
+            node_does_match = symbol == step->symbol;
+          }
+          bool later_sibling_can_match = has_later_siblings;
+          if ((step->is_immediate && is_named) || state->seeking_immediate_match) {
+            later_sibling_can_match = false;
+          }
+          if (step->is_last_child && has_later_named_siblings) {
+            node_does_match = false;
+          }
+          if (step->supertype_symbol) {
+            bool has_supertype = false;
+            for (unsigned k = 0; k < supertype_count; k++) {
+              if (supertypes[k] == step->supertype_symbol) {
+                has_supertype = true;
+                break;
+              }
+            }
+            if (!has_supertype) node_does_match = false;
+          }
+          if (step->field) {
+            if (step->field == field_id) {
+              if (!can_have_later_siblings_with_this_field) {
+                later_sibling_can_match = false;
+              }
+            } else {
+              node_does_match = false;
+            }
+          }
+
+          if (step->negated_field_list_id) {
+            TSFieldId *negated_field_ids = &self->query->negated_fields.contents[step->negated_field_list_id];
+            for (;;) {
+              TSFieldId negated_field_id = *negated_field_ids;
+              if (negated_field_id) {
+                negated_field_ids++;
+                if (ts_node_child_by_field_id(node, negated_field_id).id) {
+                  node_does_match = false;
+                  break;
+                }
+              } else {
+                break;
+              }
+            }
+          }
+
+          // Remove states immediately if it is ever clear that they cannot match.
+          if (!node_does_match) {
+            if (!later_sibling_can_match) {
+              LOG(
+                "  discard state. pattern:%u, step:%u\n",
+                state->pattern_index,
+                state->step_index
+              );
+              capture_list_pool_release(
+                &self->capture_list_pool,
+                state->capture_list_id
+              );
+              array_erase(&self->states, j);
+              j--;
+            }
+            continue;
+          }
+
+          // Some patterns can match their root node in multiple ways, capturing different
+          // children. If this pattern step could match later children within the same
+          // parent, then this query state cannot simply be updated in place. It must be
+          // split into two states: one that matches this node, and one which skips over
+          // this node, to preserve the possibility of matching later siblings.
+          if (later_sibling_can_match && (
+            step->contains_captures ||
+            ts_query__step_is_fallible(self->query, state->step_index)
+          )) {
+            if (ts_query_cursor__copy_state(self, &state)) {
+              LOG(
+                "  split state for capture. pattern:%u, step:%u\n",
+                state->pattern_index,
+                state->step_index
+              );
+              copy_count++;
+            }
+          }
+
+          // If this pattern started with a wildcard, such that the pattern map
+          // actually points to the *second* step of the pattern, then check
+          // that the node has a parent, and capture the parent node if necessary.
+          if (state->needs_parent) {
+            TSNode parent = ts_tree_cursor_parent_node(&self->cursor);
+            if (ts_node_is_null(parent)) {
+              LOG("  missing parent node\n");
+              state->dead = true;
+            } else {
+              state->needs_parent = false;
+              QueryStep *skipped_wildcard_step = step;
+              do {
+                skipped_wildcard_step--;
+              } while (
+                skipped_wildcard_step->is_dead_end ||
+                skipped_wildcard_step->is_pass_through ||
+                skipped_wildcard_step->depth > 0
+              );
+              if (skipped_wildcard_step->capture_ids[0] != NONE) {
+                LOG("  capture wildcard parent\n");
+                ts_query_cursor__capture(
+                  self,
+                  state,
+                  skipped_wildcard_step,
+                  parent
+                );
+              }
+            }
+          }
+
+          // If the current node is captured in this pattern, add it to the capture list.
+          if (step->capture_ids[0] != NONE) {
+            ts_query_cursor__capture(self, state, step, node);
+          }
+
+          if (state->dead) {
+            array_erase(&self->states, j);
+            j--;
+            continue;
+          }
+
+          // Advance this state to the next step of its pattern.
+          state->step_index++;
+          state->seeking_immediate_match = false;
+          LOG(
+            "  advance state. pattern:%u, step:%u\n",
+            state->pattern_index,
+            state->step_index
+          );
+
+          QueryStep *next_step = &self->query->steps.contents[state->step_index];
+          if (stop_on_definite_step && next_step->root_pattern_guaranteed) did_match = true;
+
+          // If this state's next step has an alternative step, then copy the state in order
+          // to pursue both alternatives. The alternative step itself may have an alternative,
+          // so this is an interactive process.
+          unsigned end_index = j + 1;
+          for (unsigned k = j; k < end_index; k++) {
+            QueryState *child_state = &self->states.contents[k];
+            QueryStep *child_step = &self->query->steps.contents[child_state->step_index];
+            if (child_step->alternative_index != NONE) {
+              // A "dead-end" step exists only to add a non-sequential jump into the step sequence,
+              // via its alternative index. When a state reaches a dead-end step, it jumps straight
+              // to the step's alternative.
+              if (child_step->is_dead_end) {
+                child_state->step_index = child_step->alternative_index;
+                k--;
+                continue;
+              }
+
+              // A "pass-through" step exists only to add a branch into the step sequence,
+              // via its alternative_index. When a state reaches a pass-through step, it splits
+              // in order to process the alternative step, and then it advances to the next step.
+              if (child_step->is_pass_through) {
+                child_state->step_index++;
+                k--;
+              }
+
+              QueryState *copy = ts_query_cursor__copy_state(self, &child_state);
+              if (copy) {
+                LOG(
+                  "  split state for branch. pattern:%u, from_step:%u, to_step:%u, immediate:%d, capture_count: %u\n",
+                  copy->pattern_index,
+                  copy->step_index,
+                  next_step->alternative_index,
+                  next_step->alternative_is_immediate,
+                  capture_list_pool_get(&self->capture_list_pool, copy->capture_list_id)->size
+                );
+                end_index++;
+                copy_count++;
+                copy->step_index = child_step->alternative_index;
+                if (child_step->alternative_is_immediate) {
+                  copy->seeking_immediate_match = true;
+                }
+              }
+            }
+          }
+        }
+
+        for (unsigned j = 0; j < self->states.size; j++) {
+          QueryState *state = &self->states.contents[j];
+          if (state->dead) {
+            array_erase(&self->states, j);
+            j--;
+            continue;
+          }
+
+          // Enforce the longest-match criteria. When a query pattern contains optional or
+          // repeated nodes, this is necessary to avoid multiple redundant states, where
+          // one state has a strict subset of another state's captures.
+          bool did_remove = false;
+          for (unsigned k = j + 1; k < self->states.size; k++) {
+            QueryState *other_state = &self->states.contents[k];
+
+            // Query states are kept in ascending order of start_depth and pattern_index.
+            // Since the longest-match criteria is only used for deduping matches of the same
+            // pattern and root node, we only need to perform pairwise comparisons within a
+            // small slice of the states array.
+            if (
+              other_state->start_depth != state->start_depth ||
+              other_state->pattern_index != state->pattern_index
+            ) break;
+
+            bool left_contains_right, right_contains_left;
+            ts_query_cursor__compare_captures(
+              self,
+              state,
+              other_state,
+              &left_contains_right,
+              &right_contains_left
+            );
+            if (left_contains_right) {
+              if (state->step_index == other_state->step_index) {
+                LOG(
+                  "  drop shorter state. pattern: %u, step_index: %u\n",
+                  state->pattern_index,
+                  state->step_index
+                );
+                capture_list_pool_release(&self->capture_list_pool, other_state->capture_list_id);
+                array_erase(&self->states, k);
+                k--;
+                continue;
+              }
+              other_state->has_in_progress_alternatives = true;
+            }
+            if (right_contains_left) {
+              if (state->step_index == other_state->step_index) {
+                LOG(
+                  "  drop shorter state. pattern: %u, step_index: %u\n",
+                  state->pattern_index,
+                  state->step_index
+                );
+                capture_list_pool_release(&self->capture_list_pool, state->capture_list_id);
+                array_erase(&self->states, j);
+                j--;
+                did_remove = true;
+                break;
+              }
+              state->has_in_progress_alternatives = true;
+            }
+          }
+
+          // If the state is at the end of its pattern, remove it from the list
+          // of in-progress states and add it to the list of finished states.
+          if (!did_remove) {
+            LOG(
+              "  keep state. pattern: %u, start_depth: %u, step_index: %u, capture_count: %u\n",
+              state->pattern_index,
+              state->start_depth,
+              state->step_index,
+              capture_list_pool_get(&self->capture_list_pool, state->capture_list_id)->size
+            );
+            QueryStep *next_step = &self->query->steps.contents[state->step_index];
+            if (next_step->depth == PATTERN_DONE_MARKER) {
+              if (state->has_in_progress_alternatives) {
+                LOG("  defer finishing pattern %u\n", state->pattern_index);
+              } else {
+                LOG("  finish pattern %u\n", state->pattern_index);
+                array_push(&self->finished_states, *state);
+                array_erase(&self->states, (uint32_t)(state - self->states.contents));
+                did_match = true;
+                j--;
+              }
+            }
+          }
+        }
+      }
+
+      if (ts_query_cursor__should_descend(self, node_intersects_range)) {
+        switch (ts_tree_cursor_goto_first_child_internal(&self->cursor)) {
+          case TreeCursorStepVisible:
+            self->depth++;
+            self->on_visible_node = true;
+            continue;
+          case TreeCursorStepHidden:
+            self->on_visible_node = false;
+            continue;
+          default:
+            break;
+        }
+      }
+
+      self->ascending = true;
+    }
+  }
+}
+
+bool ts_query_cursor_next_match(
+  TSQueryCursor *self,
+  TSQueryMatch *match
+) {
+  if (self->finished_states.size == 0) {
+    if (!ts_query_cursor__advance(self, false)) {
+      return false;
+    }
+  }
+
+  QueryState *state = &self->finished_states.contents[0];
+  if (state->id == UINT32_MAX) state->id = self->next_state_id++;
+  match->id = state->id;
+  match->pattern_index = state->pattern_index;
+  const CaptureList *captures = capture_list_pool_get(
+    &self->capture_list_pool,
+    state->capture_list_id
+  );
+  match->captures = captures->contents;
+  match->capture_count = captures->size;
+  capture_list_pool_release(&self->capture_list_pool, state->capture_list_id);
+  array_erase(&self->finished_states, 0);
+  return true;
+}
+
+void ts_query_cursor_remove_match(
+  TSQueryCursor *self,
+  uint32_t match_id
+) {
+  for (unsigned i = 0; i < self->finished_states.size; i++) {
+    const QueryState *state = &self->finished_states.contents[i];
+    if (state->id == match_id) {
+      capture_list_pool_release(
+        &self->capture_list_pool,
+        state->capture_list_id
+      );
+      array_erase(&self->finished_states, i);
+      return;
+    }
+  }
+
+  // Remove unfinished query states as well to prevent future
+  // captures for a match being removed.
+  for (unsigned i = 0; i < self->states.size; i++) {
+    const QueryState *state = &self->states.contents[i];
+    if (state->id == match_id) {
+      capture_list_pool_release(
+        &self->capture_list_pool,
+        state->capture_list_id
+      );
+      array_erase(&self->states, i);
+      return;
+    }
+  }
+}
+
+bool ts_query_cursor_next_capture(
+  TSQueryCursor *self,
+  TSQueryMatch *match,
+  uint32_t *capture_index
+) {
+  // The goal here is to return captures in order, even though they may not
+  // be discovered in order, because patterns can overlap. Search for matches
+  // until there is a finished capture that is before any unfinished capture.
+  for (;;) {
+    // First, find the earliest capture in an unfinished match.
+    uint32_t first_unfinished_capture_byte;
+    uint32_t first_unfinished_pattern_index;
+    uint32_t first_unfinished_state_index;
+    bool first_unfinished_state_is_definite = false;
+    ts_query_cursor__first_in_progress_capture(
+      self,
+      &first_unfinished_state_index,
+      &first_unfinished_capture_byte,
+      &first_unfinished_pattern_index,
+      &first_unfinished_state_is_definite
+    );
+
+    // Then find the earliest capture in a finished match. It must occur
+    // before the first capture in an *unfinished* match.
+    QueryState *first_finished_state = NULL;
+    uint32_t first_finished_capture_byte = first_unfinished_capture_byte;
+    uint32_t first_finished_pattern_index = first_unfinished_pattern_index;
+    for (unsigned i = 0; i < self->finished_states.size;) {
+      QueryState *state = &self->finished_states.contents[i];
+      const CaptureList *captures = capture_list_pool_get(
+        &self->capture_list_pool,
+        state->capture_list_id
+      );
+
+      // Remove states whose captures are all consumed.
+      if (state->consumed_capture_count >= captures->size) {
+        capture_list_pool_release(
+          &self->capture_list_pool,
+          state->capture_list_id
+        );
+        array_erase(&self->finished_states, i);
+        continue;
+      }
+
+      TSNode node = captures->contents[state->consumed_capture_count].node;
+
+      bool node_precedes_range = (
+        ts_node_end_byte(node) <= self->start_byte ||
+        point_lte(ts_node_end_point(node), self->start_point)
+      );
+      bool node_follows_range = (
+        ts_node_start_byte(node) >= self->end_byte ||
+        point_gte(ts_node_start_point(node), self->end_point)
+      );
+      bool node_outside_of_range = node_precedes_range || node_follows_range;
+
+      // Skip captures that are outside of the cursor's range.
+      if (node_outside_of_range) {
+        state->consumed_capture_count++;
+        continue;
+      }
+
+      uint32_t node_start_byte = ts_node_start_byte(node);
+      if (
+        node_start_byte < first_finished_capture_byte ||
+        (
+          node_start_byte == first_finished_capture_byte &&
+          state->pattern_index < first_finished_pattern_index
+        )
+      ) {
+        first_finished_state = state;
+        first_finished_capture_byte = node_start_byte;
+        first_finished_pattern_index = state->pattern_index;
+      }
+      i++;
+    }
+
+    // If there is finished capture that is clearly before any unfinished
+    // capture, then return its match, and its capture index. Internally
+    // record the fact that the capture has been 'consumed'.
+    QueryState *state;
+    if (first_finished_state) {
+      state = first_finished_state;
+    } else if (first_unfinished_state_is_definite) {
+      state = &self->states.contents[first_unfinished_state_index];
+    } else {
+      state = NULL;
+    }
+
+    if (state) {
+      if (state->id == UINT32_MAX) state->id = self->next_state_id++;
+      match->id = state->id;
+      match->pattern_index = state->pattern_index;
+      const CaptureList *captures = capture_list_pool_get(
+        &self->capture_list_pool,
+        state->capture_list_id
+      );
+      match->captures = captures->contents;
+      match->capture_count = captures->size;
+      *capture_index = state->consumed_capture_count;
+      state->consumed_capture_count++;
+      return true;
+    }
+
+    if (capture_list_pool_is_empty(&self->capture_list_pool)) {
+      LOG(
+        "  abandon state. index:%u, pattern:%u, offset:%u.\n",
+        first_unfinished_state_index,
+        first_unfinished_pattern_index,
+        first_unfinished_capture_byte
+      );
+      capture_list_pool_release(
+        &self->capture_list_pool,
+        self->states.contents[first_unfinished_state_index].capture_list_id
+      );
+      array_erase(&self->states, first_unfinished_state_index);
+    }
+
+    // If there are no finished matches that are ready to be returned, then
+    // continue finding more matches.
+    if (
+      !ts_query_cursor__advance(self, true) &&
+      self->finished_states.size == 0
+    ) return false;
+  }
+}
+
+void ts_query_cursor_set_max_start_depth(
+  TSQueryCursor *self,
+  uint32_t max_start_depth
+) {
+  self->max_start_depth = max_start_depth;
+}
+
+#undef LOG