feat(parser): add Dart language support#50
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tirth8205 merged 1 commit intotirth8205:mainfrom Mar 26, 2026
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Add `.dart` to EXTENSION_TO_LANGUAGE and populate the four node-type maps for Dart: - _CLASS_TYPES: class_definition, mixin_declaration, enum_declaration - _FUNCTION_TYPES: function_signature (covers top-level functions and class methods; the parser recurses into method_signature generically and matches function_signature inside it) - _IMPORT_TYPES: import_or_export (walks down to string_literal for the URI value) - _CALL_TYPES: omitted — Dart's AST lacks a dedicated call_expression wrapper; CALLS attribution will be added in a follow-up Supporting changes: - _get_name: Dart-specific path for function_signature to skip the return-type node and return the identifier (function name) - _get_params: accept formal_parameter_list (Dart's param list type) - _get_bases: handle superclass/mixins/interfaces children for INHERITS edges across extends, with, and implements clauses - _extract_import: recursive string_literal finder for import_or_export - _do_resolve_module: resolve relative Dart imports (.dart extension) - _TEST_FILE_PATTERNS: detect *_test.dart as test files Adds tests/fixtures/sample.dart covering abstract class, mixin, enum, inheritance (extends + with + implements), top-level function, and class methods. 7 new test cases, all 35 parser tests pass.
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Summary
.darttoEXTENSION_TO_LANGUAGE, enabling the graph to parse Flutter/Dart codebases_CLASS_TYPES,_FUNCTION_TYPES, and_IMPORT_TYPESfor Dart_get_name,_get_params,_get_bases,_extract_import, and_do_resolve_modulewith Dart-specific logic*_test.dartto_TEST_FILE_PATTERNStests/fixtures/sample.dartand 7 new test cases (all 35 parser tests pass)What's extracted
Classclass_definition,mixin_declaration,enum_declarationFunctionfunction_signature(top-level and class methods viamethod_signaturerecursion)IMPORTS_FROMimport_or_export→ walks tostring_literalURIINHERITSextends,with(mixins),implementsclausesCONTAINSKnown limitation
Dart's AST represents method bodies as
function_bodysiblings ofmethod_signature, rather than children. The current walker architecture attributes calls toenclosing_funcvia parent-node recursion, so CALLS edges inside method bodies are not attributed in this initial pass. A follow-up can add a Dart-specific sibling-lookahead in_extract_from_tree.Test plan
test_detect_language_darttest_parse_dart_file— Class, Function nodes extracted correctlytest_parse_dart_imports—dart:async,package:flutter/material.darttest_parse_dart_inheritance—extends Animal,with SwimmingMixintest_parse_dart_contains_edges— file→class and class→method CONTAINStest_parse_dart_method_parent— methodparent_nameset to enclosing classtest_parse_dart_top_level_function_no_parent— top-level fns haveparent_name=None