JSSpecCompiler: Parse "the *this* value" in expressions

Author: https://github.com/DanShaders
Commit: 3e6a07154b
Pull-request: https://github.com/SerenityOS/serenity/pull/23123
Reviewed-by: https://github.com/ADKaster ✅

Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Parser/TextParser.h

@@ -78,6 +78,7 @@ private:
     TextParseErrorOr<Tree> parse_record_direct_list_initialization();
     TextParseErrorOr<Vector<Tree>> parse_function_arguments();
     TextParseErrorOr<Tree> parse_list_initialization();
+    TextParseErrorOr<Tree> parse_the_this_value();
     TextParseErrorOr<Tree> parse_value();
     TextParseErrorOr<Tree> parse_expression();
     TextParseErrorOr<Tree> parse_condition();