Add PHP support

1 files changed, 1681 insertions, 0 deletions

diff --git a/vendor/tree-sitter-php/src/common/define-grammar.js b/vendor/tree-sitter-php/src/common/define-grammar.js
new file mode 100644
index 0000000..4869733
--- /dev/null
+++ b/vendor/tree-sitter-php/src/common/define-grammar.js
@@ -0,0 +1,1681 @@
+/**
+ * @author Josh Vera <vera@github.com>
+ * @author Max Brunsfeld <maxbrunsfeld@gmail.com>
+ * @author Amaan Qureshi <amaanq12@gmail.com>
+ * @author Caleb White <cdwhite3@pm.me>
+ * @author Christian Frøystad <christian@xist.no>
+ * @license MIT
+ */
+
+/// <reference types="tree-sitter-cli/dsl" />
+// @ts-check
+
+const PREC = {
+  COMMA: -1,
+  CAST: -1,
+  LOGICAL_OR_2: 1,
+  LOGICAL_XOR: 2,
+  LOGICAL_AND_2: 3,
+  ASSIGNMENT: 4,
+  TERNARY: 5,
+  NULL_COALESCE: 6,
+  LOGICAL_OR_1: 7,
+  LOGICAL_AND_1: 8,
+  BITWISE_OR: 9,
+  BITWISE_XOR: 10,
+  BITWISE_AND: 11,
+  EQUALITY: 12,
+  INEQUALITY: 13,
+  CONCAT: 14,
+  SHIFT: 15,
+  PLUS: 16,
+  TIMES: 17,
+  EXPONENTIAL: 18,
+  NEG: 19,
+  INSTANCEOF: 20,
+  INC: 21,
+  SCOPE: 22,
+  NEW: 23,
+  CALL: 24,
+  MEMBER: 25,
+  DEREF: 26,
+};
+
+module.exports = function defineGrammar(dialect) {
+  if (dialect !== 'php' && dialect !== 'php_only') {
+    throw new Error(`Unknown dialect ${dialect}`);
+  }
+
+  return grammar({
+    name: dialect,
+
+    conflicts: $ => [
+      [$._array_destructing, $.array_creation_expression],
+      [$._array_destructing_element, $.array_element_initializer],
+      [$.primary_expression, $._array_destructing_element],
+
+      [$.type, $.union_type, $.intersection_type, $.disjunctive_normal_form_type],
+      [$.union_type, $.disjunctive_normal_form_type],
+      [$.intersection_type],
+      [$.if_statement],
+
+      [$.namespace_name],
+      [$.heredoc_body],
+    ],
+
+    externals: $ => [
+      $._automatic_semicolon,
+      $.encapsed_string_chars,
+      $.encapsed_string_chars_after_variable,
+      $.execution_string_chars,
+      $.execution_string_chars_after_variable,
+      $.encapsed_string_chars_heredoc,
+      $.encapsed_string_chars_after_variable_heredoc,
+      $._eof,
+      $.heredoc_start,
+      $.heredoc_end,
+      $.nowdoc_string,
+      $.sentinel_error, // Unused token used to indicate error recovery mode
+    ],
+
+    extras: $ => {
+      const extras = [
+        $.comment,
+        /[\s\u00A0\u200B\u2060\uFEFF]/,
+      ];
+
+      if (dialect === 'php') {
+        extras.push($.text_interpolation);
+      }
+
+      return extras;
+    },
+
+    inline: $ => [
+      $._variable,
+      $._namespace_use_type,
+    ],
+
+    supertypes: $ => [
+      $.statement,
+      $.expression,
+      $.primary_expression,
+      $.type,
+      $.literal,
+    ],
+
+    word: $ => $.name,
+
+    rules: {
+      program: $ => {
+        if (dialect === 'php') {
+          return seq(
+            optional($.text),
+            optional(seq(
+              $.php_tag,
+              repeat($.statement),
+            )),
+          );
+        }
+
+        return seq(
+          optional($.php_tag),
+          repeat($.statement),
+          optional('?>'),
+        );
+      },
+
+      php_tag: _ => /<\?([pP][hH][pP]|=)?/,
+
+      text_interpolation: $ => seq(
+        '?>',
+        optional($.text),
+        choice($.php_tag, $._eof),
+      ),
+
+      text: _ => repeat1(choice(
+        token(prec(-1, /</)),
+        token(prec(1, /[^\s<][^<]*/)),
+      )),
+
+      statement: $ => choice(
+        $.empty_statement,
+        $.compound_statement,
+        $.named_label_statement,
+        $.expression_statement,
+        $.if_statement,
+        $.switch_statement,
+        $.while_statement,
+        $.do_statement,
+        $.for_statement,
+        $.foreach_statement,
+        $.goto_statement,
+        $.continue_statement,
+        $.break_statement,
+        $.return_statement,
+        $.try_statement,
+        $.declare_statement,
+        $.echo_statement,
+        $.exit_statement,
+        $.unset_statement,
+        $.const_declaration,
+        $.function_definition,
+        $.class_declaration,
+        $.interface_declaration,
+        $.trait_declaration,
+        $.enum_declaration,
+        $.namespace_definition,
+        $.namespace_use_declaration,
+        $.global_declaration,
+        $.function_static_declaration,
+      ),
+
+      empty_statement: _ => prec(-1, ';'),
+
+      reference_modifier: _ => '&',
+
+      function_static_declaration: $ => seq(
+        keyword('static'),
+        commaSep1($.static_variable_declaration),
+        $._semicolon,
+      ),
+
+      static_variable_declaration: $ => seq(
+        field('name', $.variable_name),
+        optional(seq(
+          '=',
+          field('value', $.expression),
+        )),
+      ),
+
+      global_declaration: $ => seq(
+        keyword('global'),
+        commaSep1($._simple_variable),
+        $._semicolon,
+      ),
+
+      namespace_definition: $ => seq(
+        keyword('namespace'),
+        choice(
+          seq(field('name', $.namespace_name), $._semicolon),
+          seq(
+            field('name', optional($.namespace_name)),
+            field('body', $.compound_statement),
+          ),
+        ),
+      ),
+
+      namespace_use_declaration: $ => seq(
+        keyword('use'),
+        choice(
+          commaSep1($.namespace_use_clause),
+          $._namespace_use_group,
+        ),
+        $._semicolon,
+      ),
+
+      namespace_use_clause: $ => seq(
+        field('type', optional($._namespace_use_type)),
+        $._name,
+        optional(seq(keyword('as'), field('alias', $.name))),
+      ),
+
+      _namespace_use_type: $ => choice(keyword('function'), keyword('const')),
+
+      qualified_name: $ => seq(
+        field('prefix', seq(optional($.namespace_name), '\\')),
+        $.name,
+      ),
+
+      _name: $ => choice($._identifier, $.qualified_name),
+
+      namespace_name: $ => seq(optional('\\'), $.name, repeat(seq('\\', $.name))),
+
+      _namespace_use_group: $ => seq(
+        field('type', optional($._namespace_use_type)),
+        $.namespace_name,
+        '\\',
+        field('body', $.namespace_use_group),
+      ),
+
+      namespace_use_group: $ => seq('{', commaSep1($.namespace_use_clause), '}'),
+
+      trait_declaration: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        keyword('trait'),
+        field('name', $.name),
+        field('body', $.declaration_list),
+      ),
+
+      interface_declaration: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        keyword('interface'),
+        field('name', $.name),
+        optional($.base_clause),
+        field('body', $.declaration_list),
+      ),
+
+      base_clause: $ => seq(
+        keyword('extends'),
+        commaSep1($._name),
+      ),
+
+      enum_declaration: $ => prec.right(seq(
+        optional(field('attributes', $.attribute_list)),
+        keyword('enum'),
+        field('name', $.name),
+        optional(seq(':', alias(choice('string', 'int'), $.primitive_type))),
+        optional($.class_interface_clause),
+        field('body', $.enum_declaration_list),
+      )),
+
+      enum_declaration_list: $ => seq('{', repeat($._enum_member_declaration), '}'),
+
+      _enum_member_declaration: $ => choice(
+        $.enum_case,
+        $.method_declaration,
+        $.use_declaration,
+      ),
+
+      enum_case: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        keyword('case'),
+        field('name', $.name),
+        optional(seq('=', field('value', choice($._string, $.integer)))),
+        $._semicolon,
+      ),
+
+      class_declaration: $ => prec.right(seq(
+        optional(field('attributes', $.attribute_list)),
+        repeat($._modifier),
+        keyword('class'),
+        field('name', $.name),
+        optional($.base_clause),
+        optional($.class_interface_clause),
+        field('body', $.declaration_list),
+      )),
+
+      declaration_list: $ => seq('{', repeat($._member_declaration), '}'),
+
+      final_modifier: _ => keyword('final'),
+      abstract_modifier: _ => keyword('abstract'),
+      readonly_modifier: _ => keyword('readonly'),
+
+      class_interface_clause: $ => seq(
+        keyword('implements'),
+        commaSep1($._name),
+      ),
+
+      _member_declaration: $ => choice(
+        alias($._class_const_declaration, $.const_declaration),
+        $.property_declaration,
+        $.method_declaration,
+        $.use_declaration,
+      ),
+
+      const_declaration: $ => $._const_declaration,
+
+      _class_const_declaration: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        optional($.final_modifier),
+        $._const_declaration,
+      ),
+
+      _const_declaration: $ => seq(
+        repeat($._modifier),
+        keyword('const'),
+        optional(field('type', $.type)),
+        commaSep1($.const_element),
+        $._semicolon,
+      ),
+
+      property_declaration: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        repeat1($._modifier),
+        optional(field('type', $.type)),
+        commaSep1($.property_element),
+        choice(
+          $._semicolon,
+          $.property_hook_list,
+        ),
+      ),
+
+      _modifier: $ => prec.left(choice(
+        $.var_modifier,
+        $.visibility_modifier,
+        $.static_modifier,
+        $.final_modifier,
+        $.abstract_modifier,
+        $.readonly_modifier,
+      )),
+
+      property_element: $ => seq(
+        field('name', $.variable_name),
+        optional(seq('=', field('default_value', $.expression))),
+      ),
+
+      property_hook_list: $ => seq('{', repeat($.property_hook), '}'),
+
+      property_hook: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        optional(field('final', $.final_modifier)),
+        optional(field('reference_modifier', $.reference_modifier)),
+        $.name,
+        optional(field('parameters', $.formal_parameters)),
+        $._property_hook_body,
+      ),
+
+      _property_hook_body: $ => choice(
+        seq('=>', field('body', $.expression), $._semicolon),
+        field('body', $.compound_statement),
+        $._semicolon,
+      ),
+
+      method_declaration: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        repeat($._modifier),
+        $._function_definition_header,
+        choice(
+          field('body', $.compound_statement),
+          $._semicolon,
+        ),
+      ),
+
+      var_modifier: _ => keyword('var', false),
+      static_modifier: _ => keyword('static'),
+
+      use_declaration: $ => seq(
+        keyword('use'),
+        commaSep1($._name),
+        choice($.use_list, $._semicolon),
+      ),
+
+      use_list: $ => seq(
+        '{',
+        repeat(seq(
+          choice(
+            $.use_instead_of_clause,
+            $.use_as_clause,
+          ),
+          $._semicolon,
+        )),
+        '}',
+      ),
+
+      use_instead_of_clause: $ => prec.left(seq(
+        $.class_constant_access_expression,
+        keyword('insteadof'),
+        $.name,
+      )),
+
+      use_as_clause: $ => seq(
+        choice($.class_constant_access_expression, $.name),
+        keyword('as'),
+        choice(
+          seq(
+            optional($.visibility_modifier),
+            $.name,
+          ),
+          seq(
+            $.visibility_modifier,
+            optional($.name),
+          ),
+        ),
+      ),
+
+      visibility_modifier: _ => choice(
+        keyword('public'),
+        keyword('protected'),
+        keyword('private'),
+      ),
+
+      function_definition: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        $._function_definition_header,
+        field('body', $.compound_statement),
+      ),
+
+      _function_definition_header: $ => seq(
+        keyword('function'),
+        optional($.reference_modifier),
+        field('name', $._identifier),
+        field('parameters', $.formal_parameters),
+        optional($._return_type),
+      ),
+
+      anonymous_function: $ => seq(
+        $._anonymous_function_header,
+        field('body', $.compound_statement),
+      ),
+
+      anonymous_function_use_clause: $ => seq(
+        keyword('use'),
+        '(',
+        commaSep1(choice($.by_ref, $.variable_name)),
+        optional(','),
+        ')',
+      ),
+
+      _anonymous_function_header: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        optional(field('static_modifier', $.static_modifier)),
+        keyword('function'),
+        optional(field('reference_modifier', $.reference_modifier)),
+        field('parameters', $.formal_parameters),
+        optional($.anonymous_function_use_clause),
+        optional($._return_type),
+      ),
+
+      _arrow_function_header: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        optional(field('static_modifier', $.static_modifier)),
+        keyword('fn'),
+        optional(field('reference_modifier', $.reference_modifier)),
+        field('parameters', $.formal_parameters),
+        optional($._return_type),
+      ),
+
+      arrow_function: $ => seq(
+        $._arrow_function_header,
+        '=>',
+        field('body', $.expression),
+      ),
+
+      formal_parameters: $ => seq(
+        '(',
+        commaSep(choice(
+          $.simple_parameter,
+          $.variadic_parameter,
+          $.property_promotion_parameter,
+        )),
+        optional(','),
+        ')',
+      ),
+
+      property_promotion_parameter: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        field('visibility', $.visibility_modifier),
+        field('readonly', optional($.readonly_modifier)),
+        field('type', optional($.type)), // Note: callable is not a valid type here, but instead of complicating the parser, we defer this checking to any intelligence using the parser
+        field('name', choice($.by_ref, $.variable_name)),
+        optional(seq('=', field('default_value', $.expression))),
+        optional($.property_hook_list),
+      ),
+
+      simple_parameter: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        field('type', optional($.type)),
+        optional(field('reference_modifier', $.reference_modifier)),
+        field('name', $.variable_name),
+        optional(seq('=', field('default_value', $.expression))),
+      ),
+
+      variadic_parameter: $ => seq(
+        optional(field('attributes', $.attribute_list)),
+        field('type', optional($.type)),
+        optional(field('reference_modifier', $.reference_modifier)),
+        '...',
+        field('name', $.variable_name),
+      ),
+
+      type: $ => choice(
+        $._types,
+        $.union_type,
+        $.intersection_type,
+        $.disjunctive_normal_form_type,
+      ),
+
+      _types: $ => choice(
+        $.optional_type,
+        $.named_type,
+        $.primitive_type,
+      ),
+
+      named_type: $ => choice($.name, $.qualified_name),
+
+      optional_type: $ => seq(
+        '?',
+        choice(
+          $.named_type,
+          $.primitive_type,
+        ),
+      ),
+
+      bottom_type: _ => 'never',
+
+      union_type: $ => pipeSep1($._types),
+
+      intersection_type: $ => ampSep1($._types),
+
+      disjunctive_normal_form_type: $ => prec.dynamic(-1, pipeSep1(choice(
+        seq('(', $.intersection_type, ')'),
+        $._types,
+      ))),
+
+      primitive_type: _ => choice(
+        'array',
+        keyword('callable'), // not legal in property types
+        'iterable',
+        'bool',
+        'float',
+        'int',
+        'string',
+        'void',
+        'mixed',
+        'false',
+        'null',
+        'true',
+      ),
+
+      cast_type: _ => choice(
+        keyword('array', false),
+        keyword('binary', false),
+        keyword('bool', false),
+        keyword('boolean', false),
+        keyword('double', false),
+        keyword('int', false),
+        keyword('integer', false),
+        keyword('float', false),
+        keyword('object', false),
+        keyword('real', false),
+        keyword('string', false),
+        keyword('unset', false),
+      ),
+
+      _return_type: $ => seq(':', field('return_type', choice($.type, $.bottom_type))),
+
+      const_element: $ => seq($._identifier, '=', $.expression),
+
+      echo_statement: $ => seq(keyword('echo'), $._expressions, $._semicolon),
+
+      exit_statement: $ => seq(
+        keyword('exit'),
+        optional(seq('(', optional($.expression), ')')),
+        $._semicolon,
+      ),
+
+      unset_statement: $ => seq(
+        'unset',
+        '(',
+        commaSep1($._variable),
+        optional(','),
+        ')',
+        $._semicolon,
+      ),
+
+      declare_statement: $ => seq(
+        keyword('declare'),
+        '(',
+        $.declare_directive,
+        ')',
+        choice(
+          $.statement,
+          $._semicolon,
+          seq(
+            ':',
+            repeat($.statement),
+            keyword('enddeclare'),
+            $._semicolon,
+          ),
+        ),
+      ),
+
+      declare_directive: $ => seq(
+        choice('ticks', 'encoding', 'strict_types'),
+        '=',
+        $.literal,
+      ),
+
+      literal: $ => choice(
+        $.integer,
+        $.float,
+        $._string,
+        $.boolean,
+        $.null,
+      ),
+
+      float: _ => /\d*(_\d+)*((\.\d*(_\d+)*)?([eE][\+-]?\d+(_\d+)*)|(\.\d*(_\d+)*)([eE][\+-]?\d+(_\d+)*)?)/,
+
+      try_statement: $ => seq(
+        keyword('try'),
+        field('body', $.compound_statement),
+        repeat1(choice($.catch_clause, $.finally_clause)),
+      ),
+
+      catch_clause: $ => seq(
+        keyword('catch'),
+        '(',
+        field('type', $.type_list),
+        optional(field('name', $.variable_name)),
+        ')',
+        field('body', $.compound_statement),
+      ),
+
+      type_list: $ => pipeSep1($.named_type),
+
+      finally_clause: $ => seq(
+        keyword('finally'),
+        field('body', $.compound_statement),
+      ),
+
+      goto_statement: $ => seq(
+        keyword('goto'), $.name, $._semicolon,
+      ),
+
+      continue_statement: $ => seq(
+        keyword('continue'), optional($.expression), $._semicolon,
+      ),
+
+      break_statement: $ => seq(
+        keyword('break'), optional($.expression), $._semicolon,
+      ),
+
+      integer: _ => {
+        const decimal = /[1-9]\d*(_\d+)*/;
+        const octal = /0[oO]?[0-7]*(_[0-7]+)*/;
+        const hex = /0[xX][0-9a-fA-F]+(_[0-9a-fA-F]+)*/;
+        const binary = /0[bB][01]+(_[01]+)*/;
+        return token(choice(
+          decimal,
+          octal,
+          hex,
+          binary,
+        ));
+      },
+
+      return_statement: $ => seq(
+        keyword('return'), optional($.expression), $._semicolon,
+      ),
+
+      throw_expression: $ => seq(
+        keyword('throw'),
+        $.expression,
+      ),
+
+      while_statement: $ => seq(
+        keyword('while'),
+        field('condition', $.parenthesized_expression),
+        choice(
+          field('body', $.statement),
+          seq(
+            field('body', $.colon_block),
+            keyword('endwhile'),
+            $._semicolon,
+          ),
+        ),
+      ),
+
+      do_statement: $ => seq(
+        keyword('do'),
+        field('body', $.statement),
+        keyword('while'),
+        field('condition', $.parenthesized_expression),
+        $._semicolon,
+      ),
+
+      for_statement: $ => seq(
+        keyword('for'),
+        '(',
+        field('initialize', optional($._expressions)),
+        ';',
+        field('condition', optional($._expressions)),
+        ';',
+        field('update', optional($._expressions)),
+        ')',
+        choice(
+          $._semicolon,
+          field('body', $.statement),
+          seq(
+            ':',
+            field('body', repeat($.statement)),
+            keyword('endfor'),
+            $._semicolon,
+          ),
+        ),
+      ),
+
+      _expressions: $ => choice(
+        $.expression,
+        $.sequence_expression,
+      ),
+
+      sequence_expression: $ => prec(PREC.COMMA, seq(
+        $.expression, ',', choice($.sequence_expression, $.expression)),
+      ),
+
+      foreach_statement: $ => seq(
+        keyword('foreach'),
+        '(',
+        $.expression,
+        keyword('as'),
+        choice(
+          alias($.foreach_pair, $.pair),
+          $._foreach_value,
+        ),
+        ')',
+        choice(
+          $._semicolon,
+          field('body', $.statement),
+          seq(
+            field('body', $.colon_block),
+            keyword('endforeach'),
+            $._semicolon,
+          ),
+        ),
+      ),
+
+      foreach_pair: $ => seq($.expression, '=>', $._foreach_value),
+
+      _foreach_value: $ => choice(
+        $.by_ref,
+        $.expression,
+        $.list_literal,
+      ),
+
+      if_statement: $ => seq(
+        keyword('if'),
+        field('condition', $.parenthesized_expression),
+        choice(
+          seq(
+            field('body', $.statement),
+            repeat(field('alternative', $.else_if_clause)),
+            optional(field('alternative', $.else_clause)),
+          ),
+          seq(
+            field('body', $.colon_block),
+            repeat(field('alternative', alias($.else_if_clause_2, $.else_if_clause))),
+            optional(field('alternative', alias($.else_clause_2, $.else_clause))),
+            keyword('endif'),
+            $._semicolon,
+          ),
+        ),
+      ),
+
+      colon_block: $ => seq(
+        ':',
+        repeat($.statement),
+      ),
+
+      else_if_clause: $ => seq(
+        keyword('elseif'),
+        field('condition', $.parenthesized_expression),
+        field('body', $.statement),
+      ),
+
+      else_clause: $ => seq(
+        keyword('else'),
+        field('body', $.statement),
+      ),
+
+      else_if_clause_2: $ => seq(
+        keyword('elseif'),
+        field('condition', $.parenthesized_expression),
+        field('body', $.colon_block),
+      ),
+
+      else_clause_2: $ => seq(
+        keyword('else'),
+        field('body', $.colon_block),
+      ),
+
+      match_expression: $ => seq(
+        keyword('match'),
+        field('condition', $.parenthesized_expression),
+        field('body', $.match_block),
+      ),
+
+      match_block: $ => prec.left(
+        seq(
+          '{',
+          commaSep(
+            choice(
+              $.match_conditional_expression,
+              $.match_default_expression,
+            ),
+          ),
+          optional(','),
+          '}',
+        ),
+      ),
+
+      match_condition_list: $ => seq(commaSep1($.expression), optional(',')),
+
+      match_conditional_expression: $ => seq(
+        field('conditional_expressions', $.match_condition_list),
+        '=>',
+        field('return_expression', $.expression),
+      ),
+
+      match_default_expression: $ => seq(
+        keyword('default'),
+        '=>',
+        field('return_expression', $.expression),
+      ),
+
+      switch_statement: $ => seq(
+        keyword('switch'),
+        field('condition', $.parenthesized_expression),
+        field('body', $.switch_block),
+      ),
+
+      switch_block: $ => choice(
+        seq(
+          '{',
+          repeat(choice($.case_statement, $.default_statement)),
+          '}',
+        ),
+        seq(
+          ':',
+          repeat(choice($.case_statement, $.default_statement)),
+          keyword('endswitch'),
+          $._semicolon,
+        ),
+      ),
+
+      case_statement: $ => seq(
+        keyword('case'),
+        field('value', $.expression),
+        choice(':', ';'),
+        repeat($.statement),
+      ),
+
+      default_statement: $ => seq(
+        keyword('default'),
+        choice(':', ';'),
+        repeat($.statement),
+      ),
+
+      compound_statement: $ => seq('{', repeat($.statement), '}'),
+
+      named_label_statement: $ => seq($.name, ':'),
+
+      expression_statement: $ => seq($.expression, $._semicolon),
+
+      expression: $ => choice(
+        $.conditional_expression,
+        $.match_expression,
+        $.augmented_assignment_expression,
+        $.assignment_expression,
+        $.reference_assignment_expression,
+        $.yield_expression,
+        $._unary_expression,
+        $.error_suppression_expression,
+        $.binary_expression,
+        $.include_expression,
+        $.include_once_expression,
+        $.require_expression,
+        $.require_once_expression,
+      ),
+
+      _unary_expression: $ => choice(
+        $.clone_expression,
+        $.primary_expression,
+        $.unary_op_expression,
+        $.cast_expression,
+      ),
+
+      unary_op_expression: $ => prec.left(PREC.NEG, seq(
+        field('operator', choice('+', '-', '~', '!')),
+        field('argument', $.expression),
+      )),
+
+      error_suppression_expression: $ => prec(PREC.INC, seq('@', $.expression)),
+
+      clone_expression: $ => seq(keyword('clone'), $.primary_expression),
+
+      primary_expression: $ => choice(
+        $._variable,
+        $.literal,
+        $.class_constant_access_expression,
+        $.qualified_name,
+        $.name,
+        $.array_creation_expression,
+        $.print_intrinsic,
+        $.anonymous_function,
+        $.arrow_function,
+        $.object_creation_expression,
+        $.update_expression,
+        $.shell_command_expression,
+        $.parenthesized_expression,
+        $.throw_expression,
+        $.arrow_function,
+      ),
+
+      parenthesized_expression: $ => seq('(', $.expression, ')'),
+
+      class_constant_access_expression: $ => seq(
+        $._scope_resolution_qualifier,
+        '::',
+        choice(
+          $._identifier,
+          seq('{', alias($.expression, $.name), '}'),
+        ),
+      ),
+
+      print_intrinsic: $ => seq(
+        keyword('print'), $.expression,
+      ),
+
+      object_creation_expression: $ => prec.right(PREC.NEW, seq(
+        keyword('new'),
+        choice(
+          seq($._class_name_reference, optional($.arguments)),
+          $.anonymous_class,
+        ),
+      )),
+
+      object_creation_expression: $ => choice(
+        $._new_dereferencable_expression,
+        $._new_non_dereferencable_expression,
+      ),
+
+      _new_non_dereferencable_expression: $ => prec.right(PREC.NEW, seq(
+        keyword('new'),
+        $._class_name_reference,
+      )),
+
+      _new_dereferencable_expression: $ => prec.right(PREC.NEW, seq(
+        keyword('new'),
+        choice(
+          seq($._class_name_reference, $.arguments),
+          $.anonymous_class,
+        ),
+      )),
+
+      _class_name_reference: $ => choice(
+        $._name,
+        $._new_variable,
+        $.parenthesized_expression,
+      ),
+
+      anonymous_class: $ => prec.right(seq(
+        optional(field('attributes', $.attribute_list)),
+        repeat($._modifier),
+        keyword('class'),
+        optional($.arguments),
+        optional($.base_clause),
+        optional($.class_interface_clause),
+        field('body', $.declaration_list),
+      )),
+
+      update_expression: $ => {
+        const argument = field('argument', $._variable);
+        const operator = field('operator', choice('--', '++'));
+        return prec.left(PREC.INC, choice(
+          seq(operator, argument),
+          seq(argument, operator),
+        ));
+      },
+
+      cast_expression: $ => prec(PREC.CAST, seq(
+        '(',
+        field('type', $.cast_type),
+        ')',
+        field('value', choice(
+          $._unary_expression,
+          $.include_expression,
+          $.include_once_expression,
+          $.error_suppression_expression,
+        )),
+      )),
+
+      cast_variable: $ => prec(PREC.CAST, seq(
+        '(', field('type', $.cast_type), ')',
+        field('value', $._variable),
+      )),
+
+      assignment_expression: $ => prec.right(PREC.ASSIGNMENT, seq(
+        field('left', choice(
+          $._variable,
+          $.list_literal,
+        )),
+        '=',
+        field('right', $.expression),
+      )),
+
+      reference_assignment_expression: $ => prec.right(PREC.ASSIGNMENT, seq(
+        field('left', choice(
+          $._variable,
+          $.list_literal,
+        )),
+        '=',
+        '&',
+        field('right', $.expression),
+      )),
+
+      conditional_expression: $ => prec.left(PREC.TERNARY, seq( // TODO: Ternay is non-assossiative after PHP 8
+        field('condition', $.expression),
+        '?',
+        field('body', optional($.expression)),
+        ':',
+        field('alternative', $.expression),
+      )),
+
+      augmented_assignment_expression: $ => prec.right(PREC.ASSIGNMENT, seq(
+        field('left', $._variable),
+        field('operator', choice(
+          '**=',
+          '*=',
+          '/=',
+          '%=',
+          '+=',
+          '-=',
+          '.=',
+          '<<=',
+          '>>=',
+          '&=',
+          '^=',
+          '|=',
+          '??=',
+        )),
+        field('right', $.expression),
+      )),
+
+      _variable: $ => choice(
+        alias($.cast_variable, $.cast_expression),
+        $._new_variable,
+        $._callable_variable,
+        $.scoped_property_access_expression,
+        $.member_access_expression,
+        $.nullsafe_member_access_expression,
+      ),
+
+      _variable_member_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('object', $._new_variable),
+        '->',
+        $._member_name,
+      )),
+
+      member_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('object', $._dereferencable_expression),
+        '->',
+        $._member_name,
+      )),
+
+      _variable_nullsafe_member_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('object', $._new_variable),
+        '?->',
+        $._member_name,
+      )),
+
+      nullsafe_member_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('object', $._dereferencable_expression),
+        '?->',
+        $._member_name,
+      )),
+
+      _variable_scoped_property_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('scope', choice($._name, $._new_variable)),
+        '::',
+        field('name', $._simple_variable),
+      )),
+
+      scoped_property_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('scope', $._scope_resolution_qualifier),
+        '::',
+        field('name', $._simple_variable),
+      )),
+
+      list_literal: $ => choice($._list_destructing, $._array_destructing),
+
+      _list_destructing: $ => seq(
+        keyword('list'),
+        '(',
+        commaSep1(optional(
+          choice(
+            alias($._list_destructing, $.list_literal),
+            $._variable,
+            $.by_ref,
+            seq(
+              $.expression,
+              '=>',
+              choice(
+                alias($._list_destructing, $.list_literal),
+                $._variable,
+                $.by_ref,
+              ),
+            ),
+          ),
+        )),
+        ')',
+      ),
+
+      _array_destructing: $ => seq(
+        '[',
+        commaSep1(optional($._array_destructing_element)),
+        ']',
+      ),
+
+      _array_destructing_element: $ => choice(
+        choice(
+          alias($._array_destructing, $.list_literal),
+          $._variable,
+          $.by_ref,
+        ),
+        seq(
+          $.expression,
+          '=>',
+          choice(
+            alias($._array_destructing, $.list_literal),
+            $._variable,
+            $.by_ref,
+          ),
+        ),
+      ),
+
+      function_call_expression: $ => prec(PREC.CALL, seq(
+        field('function', choice($._name, $._callable_expression)),
+        field('arguments', $.arguments),
+      )),
+
+      _callable_expression: $ => choice(
+        $._callable_variable,
+        $.parenthesized_expression,
+        $._dereferencable_scalar,
+        alias($._new_dereferencable_expression, $.object_creation_expression),
+      ),
+
+      scoped_call_expression: $ => prec(PREC.CALL, seq(
+        field('scope', $._scope_resolution_qualifier),
+        '::',
+        $._member_name,
+        field('arguments', $.arguments),
+      )),
+
+      _scope_resolution_qualifier: $ => choice(
+        $.relative_scope,
+        $._name,
+        $._dereferencable_expression,
+      ),
+
+      relative_scope: _ => prec(PREC.SCOPE, choice(
+        'self',
+        'parent',
+        keyword('static'),
+      )),
+
+      variadic_placeholder: _ => '...',
+
+      arguments: $ => seq(
+        '(',
+        optional(choice(
+          seq(commaSep1($.argument), optional(',')),
+          $.variadic_placeholder,
+        )),
+        ')',
+      ),
+
+      argument: $ => seq(
+        optional($._argument_name),
+        optional(field('reference_modifier', $.reference_modifier)),
+        choice(
+          alias($._reserved_identifier, $.name),
+          $.variadic_unpacking,
+          $.expression,
+        ),
+      ),
+
+      _argument_name: $ => seq(
+        field('name', alias(
+          choice(
+            $.name,
+            keyword('array', false),
+            keyword('fn', false),
+            keyword('function', false),
+            keyword('match', false),
+            keyword('namespace', false),
+            keyword('null', false),
+            keyword('static', false),
+            keyword('throw', false),
+            'parent',
+            'self',
+            /true|false/i,
+          ),
+          $.name,
+        )),
+        ':',
+      ),
+
+      member_call_expression: $ => prec(PREC.CALL, seq(
+        field('object', $._dereferencable_expression),
+        '->',
+        $._member_name,
+        field('arguments', $.arguments),
+      )),
+
+      nullsafe_member_call_expression: $ => prec(PREC.CALL, seq(
+        field('object', $._dereferencable_expression),
+        '?->',
+        $._member_name,
+        field('arguments', $.arguments),
+      )),
+
+      variadic_unpacking: $ => seq('...', $.expression),
+
+      _member_name: $ => choice(
+        field('name', choice(
+          $._identifier,
+          $._simple_variable,
+        )),
+        seq('{', field('name', $.expression), '}'),
+      ),
+
+      _variable_subscript_expression: $ => seq(
+        $._new_variable,
+        seq('[', optional($.expression), ']'),
+      ),
+
+      _dereferencable_subscript_expression: $ => seq(
+        $._dereferencable_expression,
+        seq('[', optional($.expression), ']'),
+      ),
+
+      _dereferencable_expression: $ => prec(PREC.DEREF, choice(
+        $._variable,
+        alias($._new_dereferencable_expression, $.object_creation_expression),
+        $.class_constant_access_expression,
+        $.parenthesized_expression,
+        $._dereferencable_scalar,
+        $._name,
+      )),
+
+      _dereferencable_scalar: $ => prec(PREC.DEREF, choice(
+        $.array_creation_expression,
+        $._string,
+      )),
+
+      array_creation_expression: $ => choice(
+        seq(keyword('array'), '(', commaSep($.array_element_initializer), optional(','), ')'),
+        seq('[', commaSep($.array_element_initializer), optional(','), ']'),
+      ),
+
+      attribute_group: $ => seq(
+        '#[',
+        commaSep1($.attribute),
+        optional(','),
+        ']',
+      ),
+
+      attribute_list: $ => repeat1($.attribute_group),
+
+      attribute: $ => seq(
+        $._name,
+        optional(field('parameters', $.arguments)),
+      ),
+
+      _complex_string_part: $ => seq('{', $.expression, '}'),
+
+      _simple_string_member_access_expression: $ => prec(PREC.MEMBER, seq(
+        field('object', $.variable_name),
+        '->',
+        field('name', $.name),
+      )),
+
+      _simple_string_subscript_unary_expression: $ => prec.left(seq('-', $.integer)),
+
+      _simple_string_array_access_argument: $ => choice(
+        $.integer,
+        alias($._simple_string_subscript_unary_expression, $.unary_op_expression),
+        $.name,
+        $.variable_name,
+      ),
+
+      _simple_string_subscript_expression: $ => prec(PREC.DEREF, seq(
+        $.variable_name,
+        seq('[', $._simple_string_array_access_argument, ']'),
+      )),
+
+      _simple_string_part: $ => choice(
+        alias($._simple_string_member_access_expression, $.member_access_expression),
+        $._simple_variable,
+        alias($._simple_string_subscript_expression, $.subscript_expression),
+      ),
+
+      // Note: remember to also update the is_escapable_sequence method in the
+      // external scanner whenever changing these rules
+      escape_sequence: _ => token.immediate(seq(
+        '\\',
+        choice(
+          'n',
+          'r',
+          't',
+          'v',
+          'e',
+          'f',
+          '\\',
+          /\$/,
+          '"',
+          '`',
+          /[0-7]{1,3}/,
+          /x[0-9A-Fa-f]{1,2}/,
+          /u\{[0-9A-Fa-f]+\}/,
+        ),
+      )),
+
+      _interpolated_string_body: $ => repeat1(
+        choice(
+          $.escape_sequence,
+          seq($.variable_name, alias($.encapsed_string_chars_after_variable, $.string_content)),
+          alias($.encapsed_string_chars, $.string_content),
+          $._simple_string_part,
+          $._complex_string_part,
+          alias('\\u', $.string_content),
+        ),
+      ),
+
+      _interpolated_string_body_heredoc: $ => repeat1(
+        choice(
+          $.escape_sequence,
+          seq(
+            $.variable_name,
+            alias($.encapsed_string_chars_after_variable_heredoc, $.string_content),
+          ),
+          alias($.encapsed_string_chars_heredoc, $.string_content),
+          $._simple_string_part,
+          $._complex_string_part,
+          alias('\\u', $.string_content),
+        ),
+      ),
+
+      encapsed_string: $ => prec.right(seq(
+        choice(/[bB]"/, '"'),
+        optional($._interpolated_string_body),
+        '"',
+      )),
+
+      string: $ => seq(
+        choice(/[bB]'/, '\''),
+        repeat(choice(
+          alias(token(choice('\\\\', '\\\'')), $.escape_sequence),
+          $.string_content,
+        )),
+        '\'',
+      ),
+
+      string_content: _ => prec.right(repeat1(token.immediate(prec(1, /\\?[^'\\]+/)))),
+
+      heredoc_body: $ => seq(
+        $._new_line,
+        repeat1(prec.right(seq(
+          optional($._new_line),
+          $._interpolated_string_body_heredoc,
+        ))),
+      ),
+
+      heredoc: $ => seq(
+        token('<<<'),
+        optional('"'),
+        field('identifier', $.heredoc_start),
+        optional(token.immediate('"')),
+        choice(
+          seq(
+            field('value', $.heredoc_body),
+            $._new_line,
+          ),
+          field('value', optional($.heredoc_body)),
+        ),
+        field('end_tag', $.heredoc_end),
+      ),
+
+      _new_line: _ => /\r?\n|\r/,
+
+      nowdoc_body: $ => seq(
+        $._new_line,
+        repeat1($.nowdoc_string),
+      ),
+
+      nowdoc: $ => seq(
+        token('<<<'),
+        '\'',
+        field('identifier', $.heredoc_start),
+        token.immediate('\''),
+        choice(
+          seq(
+            field('value', $.nowdoc_body),
+            $._new_line,
+          ),
+          field('value', optional($.nowdoc_body)),
+        ),
+        field('end_tag', $.heredoc_end),
+      ),
+
+      _interpolated_execution_operator_body: $ => repeat1(
+        choice(
+          $.escape_sequence,
+          seq($.variable_name, alias($.execution_string_chars_after_variable, $.string_content)),
+          alias($.execution_string_chars, $.string_content),
+          $._simple_string_part,
+          $._complex_string_part,
+          alias('\\u', $.string_content),
+        ),
+      ),
+
+      shell_command_expression: $ => seq(
+        '`',
+        optional($._interpolated_execution_operator_body),
+        '`',
+      ),
+
+      boolean: _ => /true|false/i,
+
+      null: _ => keyword('null', false),
+
+      _string: $ => choice($.encapsed_string, $.string, $.heredoc, $.nowdoc),
+
+      dynamic_variable_name: $ => choice(
+        seq('$', $._simple_variable),
+        seq('$', '{', $.expression, '}'),
+      ),
+
+      _simple_variable: $ => choice($.variable_name, $.dynamic_variable_name),
+
+      _new_variable: $ => prec(1, choice(
+        $._simple_variable,
+        alias($._variable_subscript_expression, $.subscript_expression),
+        alias($._variable_member_access_expression, $.member_access_expression),
+        alias($._variable_nullsafe_member_access_expression, $.nullsafe_member_access_expression),
+        alias($._variable_scoped_property_access_expression, $.scoped_property_access_expression),
+      )),
+
+      _callable_variable: $ => choice(
+        $._simple_variable,
+        alias($._dereferencable_subscript_expression, $.subscript_expression),
+        $.member_call_expression,
+        $.nullsafe_member_call_expression,
+        $.function_call_expression,
+        $.scoped_call_expression,
+      ),
+
+      variable_name: $ => seq('$', $.name),
+
+      by_ref: $ => seq('&', $._variable),
+
+      yield_expression: $ => prec.right(seq(
+        keyword('yield'),
+        optional(choice(
+          $.array_element_initializer,
+          seq(keyword('from'), $.expression),
+        )),
+      )),
+
+      array_element_initializer: $ => prec.right(choice(
+        choice($.by_ref, $.expression),
+        seq($.expression, '=>', choice($.by_ref, $.expression)),
+        $.variadic_unpacking,
+      )),
+
+      binary_expression: $ => choice(
+        prec(PREC.INSTANCEOF, seq(
+          field('left', $._unary_expression),
+          field('operator', keyword('instanceof')),
+          field('right', $._class_name_reference),
+        )),
+        prec.right(PREC.NULL_COALESCE, seq(
+          field('left', $.expression),
+          field('operator', '??'),
+          field('right', $.expression),
+        )),
+        prec.right(PREC.EXPONENTIAL, seq(
+          field('left', $.expression),
+          field('operator', '**'),
+          field('right', $.expression),
+        )),
+        ...[
+          [keyword('and'), PREC.LOGICAL_AND_2],
+          [keyword('or'), PREC.LOGICAL_OR_2],
+          [keyword('xor'), PREC.LOGICAL_XOR],
+          ['||', PREC.LOGICAL_OR_1],
+          ['&&', PREC.LOGICAL_AND_1],
+          ['|', PREC.BITWISE_OR],
+          ['^', PREC.BITWISE_XOR],
+          ['&', PREC.BITWISE_AND],
+          ['==', PREC.EQUALITY],
+          ['!=', PREC.EQUALITY],
+          ['<>', PREC.EQUALITY],
+          ['===', PREC.EQUALITY],
+          ['!==', PREC.EQUALITY],
+          ['<', PREC.INEQUALITY],
+          ['>', PREC.INEQUALITY],
+          ['<=', PREC.INEQUALITY],
+          ['>=', PREC.INEQUALITY],
+          ['<=>', PREC.EQUALITY],
+          ['<<', PREC.SHIFT],
+          ['>>', PREC.SHIFT],
+          ['+', PREC.PLUS],
+          ['-', PREC.PLUS],
+          ['.', PREC.CONCAT],
+          ['*', PREC.TIMES],
+          ['/', PREC.TIMES],
+          ['%', PREC.TIMES],
+          // @ts-ignore
+        ].map(([op, p]) => prec.left(p, seq(
+          field('left', $.expression),
+          // @ts-ignore
+          field('operator', op),
+          field('right', $.expression),
+        ))),
+      ),
+
+      include_expression: $ => seq(
+        keyword('include'),
+        $.expression,
+      ),
+
+      include_once_expression: $ => seq(
+        keyword('include_once'),
+        $.expression,
+      ),
+
+      require_expression: $ => seq(
+        keyword('require'),
+        $.expression,
+      ),
+
+      require_once_expression: $ => seq(
+        keyword('require_once'),
+        $.expression,
+      ),
+
+      // Note that PHP officially only supports the following character regex
+      // for identifiers: ^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*$
+      // However, there is a "bug" in how PHP parses multi-byte characters that allows
+      // for a much larger range of characters to be used in identifiers.
+      //
+      // See: https://www.php.net/manual/en/language.variables.basics.php
+      name: _ => {
+        // We need to side step around the whitespace characters in the extras array.
+        const range = String.raw`\u0080-\u009f\u00a1-\u200a\u200c-\u205f\u2061-\ufefe\uff00-\uffff`;
+        return new RegExp(`[_a-zA-Z${range}][_a-zA-Z${range}\\d]*`);
+      },
+
+      _reserved_identifier: _ => choice(
+        'self',
+        'parent',
+        keyword('static'),
+      ),
+
+      _identifier: $ => choice(
+        $.name,
+        alias($._reserved_identifier, $.name),
+      ),
+
+      comment: _ => token(choice(
+        seq(
+          choice('//', /#[^?\[?\r?\n]/),
+          repeat(/[^?\r?\n]|\?[^>\r\n]/),
+          optional(/\?\r?\n/),
+        ),
+        '#',
+        seq(
+          '/*',
+          /[^*]*\*+([^/*][^*]*\*+)*/,
+          '/',
+        ),
+      )),
+
+      _semicolon: $ => choice($._automatic_semicolon, ';'),
+    },
+  });
+};
+
+/**
+ * Creates a regex that matches the given word case-insensitively,
+ * and will alias the regex to the word if aliasAsWord is true
+ *
+ * @param {string} word
+ * @param {boolean} aliasAsWord?
+ *
+ * @return {RegExp|AliasRule}
+ */
+function keyword(word, aliasAsWord = true) {
+  /** @type {RegExp|AliasRule} */
+  let result = new RegExp(word, 'i');
+  if (aliasAsWord) result = alias(result, word);
+  return result;
+}
+
+/**
+ * Creates a rule to match one or more of the rules separated by a comma
+ *
+ * @param {Rule} rule
+ *
+ * @return {SeqRule}
+ *
+ */
+function commaSep1(rule) {
+  return seq(rule, repeat(seq(',', rule)));
+}
+
+/**
+ * Creates a rule to optionally match one or more of the rules separated by a comma
+ *
+ * @param {Rule} rule
+ *
+ * @return {ChoiceRule}
+ *
+ */
+function commaSep(rule) {
+  return optional(commaSep1(rule));
+}
+
+/**
+ * Creates a rule to match one or more of the rules separated by a pipe
+ *
+ * @param {Rule} rule
+ *
+ * @return {SeqRule}
+ */
+function pipeSep1(rule) {
+  return seq(rule, repeat(seq('|', rule)));
+}
+
+/**
+ * Creates a rule to  match one or more of the rules separated by an ampersand
+ *
+ * @param {Rule} rule
+ *
+ * @return {SeqRule}
+ */
+function ampSep1(rule) {
+  return seq(rule, repeat(seq(token('&'), rule)));
+}