1 files changed, 67 insertions, 0 deletions

diff --git a/vendor/tree-sitter-tcl/src/scanner.c b/vendor/tree-sitter-tcl/src/scanner.c
new file mode 100644
index 0000000..f55054a
--- /dev/null
+++ b/vendor/tree-sitter-tcl/src/scanner.c
@@ -0,0 +1,67 @@
+#include "tree_sitter/parser.h"
+#include <wctype.h>
+
+enum TokenType {
+  CONCAT,
+  NS_DELIM,
+};
+
+static bool is_eof(TSLexer *lexer) {
+  return lexer->lookahead == 0;
+}
+
+static bool is_concat_valid(TSLexer *lexer, const bool *valid_symbols) {
+  return valid_symbols[CONCAT] && (
+    iswalpha(lexer->lookahead) ||
+    lexer->lookahead == '$' ||
+    lexer->lookahead == '[' ||
+    lexer->lookahead == '_'
+  );
+  // return valid_symbols[CONCAT] && !(
+  //         is_eof(lexer) ||
+  //         iswspace(lexer->lookahead) ||
+  //         lexer->lookahead == ']' ||
+  //         lexer->lookahead == '$' ||
+  //         lexer->lookahead == ')' ||
+  //         lexer->lookahead == '}'
+  //         );
+}
+
+static bool scan_ns_delim(TSLexer *lexer) {
+  if (lexer->lookahead == ':') {
+    lexer->advance(lexer, false);
+    if (lexer->lookahead == ':') {
+      lexer->advance(lexer, false);
+      if (iswalpha(lexer->lookahead)) {
+        lexer->result_symbol = NS_DELIM;
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+void *tree_sitter_tcl_external_scanner_create() {
+  return NULL;
+}
+
+bool tree_sitter_tcl_external_scanner_scan(void *payload, TSLexer *lexer,
+                                          const bool *valid_symbols) {
+  if (valid_symbols[NS_DELIM]) {
+    return scan_ns_delim(lexer);
+  }
+
+  if (is_concat_valid(lexer, valid_symbols)) {
+    return true;
+  }
+
+  return false;
+}
+
+unsigned tree_sitter_tcl_external_scanner_serialize(void *payload, char *state) {
+  return 0;
+}
+
+void tree_sitter_tcl_external_scanner_deserialize(void *payload, const char *state, unsigned length){ }
+
+void tree_sitter_tcl_external_scanner_destroy(void *payload) {}