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feat(es/transformer): Enhance TraverseCtx with essential transformation APIs

#11296Closed
Comparing
devbird/enhance-traverse-ctx
(
3ed768c
) with
dev/single-pass
(
3bc5042
)
CodSpeed Performance Gauge
0%
Untouched
138
Ignored
1

Benchmarks

Passed

es/minifier/libs/terser
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
349.8 ms348.1 ms
es/minifier/libs/antd
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
1.9 s1.9 s
es/minifier/libs/typescript
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
3.8 s3.8 s
es/minifier/libs/d3
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
394.9 ms394.3 ms
es/lexer/colors
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
26.3 µs26.3 µs
es/parser/cal-com
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
56.7 ms56.7 ms
es/fixer/typescript
crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
201.8 ms201.7 ms
es/lints/libs/react
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
1.3 ms1.3 ms
es/parser/angular
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
17.7 ms17.7 ms
es/parser/three
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
67.6 ms67.6 ms
css_spec
crates/swc_html_minifier/benches/full.rs::files_document::bench_files_document::html/minify/document
CodSpeed Performance Gauge
0%
196.5 ms196.5 ms
es/minifier/libs/three
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
646.4 ms646.2 ms
es/lexer/typescript
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
107.7 ms107.6 ms
html/document_fragment/visitor/compare/clone
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1 ms1 ms
github
crates/swc_html_minifier/benches/full.rs::files_document::bench_files_document::html/minify/document
CodSpeed Performance Gauge
0%
42.4 ms42.3 ms
es/parser/backbone
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
2.7 ms2.7 ms
es/lints/libs/moment
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
4.2 ms4.2 ms
html/parser/parser_document/css_2021_spec
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
72.3 ms72.2 ms
es/codegen/with-parser/colors
crates/swc_ecma_codegen/benches/with_parse.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
157.6 µs157.6 µs
html/document/visitor/compare/clone
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1 ms1 ms
es/full-target/es2016
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group
CodSpeed Performance Gauge
0%
577.9 µs577.8 µs
es/lints/libs/victory
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
70.8 ms70.7 ms
html/document_fragment/visitor/compare/fold_span_panic
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
es/visitor/compare/clone
crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
5.5 ms5.5 ms
es/transform/baseline/common_typescript
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group
CodSpeed Performance Gauge
0%
370.6 µs370.6 µs
css_spec
crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment
CodSpeed Performance Gauge
0%
196.3 ms196.3 ms
es2015_classes
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
390.9 µs390.9 µs
es/transform/baseline/common_reserved_word
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group
CodSpeed Performance Gauge
0%
278.1 µs278.1 µs
es/lexer/underscore
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
737.4 µs737.4 µs
es/parser/yui
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
10.9 ms10.9 ms
es/parser/typescript
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
379.8 ms379.7 ms
es/minifier/libs/react
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
19.6 ms19.6 ms
css/lexer/tailwind_3_1_1
crates/swc_css_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
1.8 ms1.8 ms
es2015_shorthand_property
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
274.4 µs274.4 µs
es2022_class_properties
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
384.4 µs384.4 µs
css/parser/foundation_6_7_4
crates/swc_css_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
37 ms37 ms
parse_and_babelify_jquery
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
99.4 ms99.4 ms
es/lexer/cal-com
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
13.1 ms13.1 ms
es2015_instanceof
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
278.3 µs278.3 µs
parse_and_babelify_underscore
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
13.1 ms13.1 ms
parse_and_babelify_jquery_mobile
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
169.8 ms169.8 ms
parse_and_babelify_backbone
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
15.4 ms15.4 ms
es/codegen/with-parser/large
crates/swc_ecma_codegen/benches/with_parse.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
es2015_sticky_regex
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
273.8 µs273.8 µs
html/lexer/github_com_17_05_2022
crates/swc_html_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
14.4 ms14.4 ms
es/codegen/large
crates/swc_ecma_codegen/benches/bench.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
639.6 µs639.6 µs
es2015_duplicate_keys
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
281.1 µs281.1 µs
es2015_block_scoped_fn
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
292.1 µs292.1 µs
css/parser/tailwind_3_1_1
crates/swc_css_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
7.2 ms7.2 ms
css/visitor/compare/fold_span_panic
crates/swc_css_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
5.8 ms5.8 ms
es2015_computed_props
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
273.7 µs273.7 µs
es2015_fn_name
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
280.9 µs280.9 µs
parse_and_babelify_mootools
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
72.6 ms72.6 ms
es/lexer/jquery mobile
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
7.2 ms7.2 ms
parse_and_babelify_angular
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
160.3 ms160.3 ms
es/lints/libs/jquery
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
6.5 ms6.5 ms
es2020_nullish_coalescing
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
291.3 µs291.3 µs
parse_and_babelify_yui
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
67.6 ms67.6 ms
es/lexer/angular
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
6.6 ms6.6 ms
es/lexer/jquery
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
4.6 ms4.6 ms
es2019_optional_catch_binding
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
271.9 µs271.9 µs
es/target/es2020
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
458.9 µs458.9 µs
typescript/fast-strip
crates/swc_ts_fast_strip/benches/assets.rs::benches::fast_ts
CodSpeed Performance Gauge
0%
420.1 µs420.1 µs
es2015_for_of
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
293.7 µs293.7 µs
es2016_exponentiation
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
291.9 µs291.9 µs
es2015_typeof_symbol
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
275.9 µs275.9 µs
html/lexer/stackoverflow_com_17_05_2022
crates/swc_html_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
14.5 ms14.5 ms
html/lexer/css_2021_spec
crates/swc_html_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
40 ms40 ms
es/visitor/compare/visit_mut_span
crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
6 ms6 ms
css/lexer/bootstrap_5_1_3
crates/swc_css_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
11 ms11 ms
es/visitor/compare/visit_mut_span_panic
crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
6 ms6 ms
html/parser/parser_document_fragment/stackoverflow_com_17_05_2022
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
22.6 ms22.6 ms
es/target/es3
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
398.6 µs398.6 µs
es/visitor/compare/fold_span
crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
6.8 ms6.8 ms
es/transform/baseline/base
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::baseline_group
CodSpeed Performance Gauge
0%
259.7 µs259.7 µs
es2015_destructuring
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
345.6 µs345.6 µs
css/visitor/compare/visit_mut_span_panic
crates/swc_css_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
5.1 ms5.1 ms
es2015_block_scoping
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
456.7 µs456.7 µs
es/lints/libs/lodash
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
6.2 ms6.2 ms
es/full-target/es2018
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group
CodSpeed Performance Gauge
0%
523.4 µs523.4 µs
es2017_async_to_generator
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
277.1 µs277.1 µs
css/lexer/foundation_6_7_4
crates/swc_css_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
9 ms9 ms
html/parser/parser_document_fragment/css_2021_spec
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
71.9 ms71.9 ms
es/visitor/compare/fold_span_panic
crates/swc_ecma_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
6.8 ms6.8 ms
es/lints/libs/vue
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
8.3 ms8.3 ms
es2020_optional_chaining
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
337.9 µs338 µs
es2015_arrow
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
299.3 µs299.4 µs
es2018_object_rest_spread
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
290.7 µs290.7 µs
es/lexer/mootools
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
3.6 ms3.6 ms
es2015_spread
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
273.1 µs273.1 µs
html/document/visitor/compare/visit_mut_span
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.1 ms1.1 ms
html/parser/parser_document/github_com_17_05_2022
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
22.5 ms22.5 ms
babelify-only
crates/swc_estree_compat/benches/babelify.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
2.1 ms2.1 ms
es/lints/libs/antd
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
156.3 ms156.4 ms
html/document/visitor/compare/fold_span
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
es/target/es2015
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
es/lexer/three
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
18.3 ms18.3 ms
es/full-target/es2017
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::full_group
CodSpeed Performance Gauge
0%
542.4 µs542.5 µs
html/document_fragment/visitor/compare/fold_span
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
es/lexer/yui
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
4 ms4 ms
stackoverflow
crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment
CodSpeed Performance Gauge
0%
37.4 ms37.5 ms
es2015_parameters
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::single_tr_group
CodSpeed Performance Gauge
0%
332.6 µs332.7 µs
es/lints/libs/typescript
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
276.3 ms276.4 ms
css/visitor/compare/fold_span
crates/swc_css_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
5.8 ms5.8 ms
html/document_fragment/visitor/compare/visit_mut_span
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.1 ms1.1 ms
css/visitor/compare/clone
crates/swc_css_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
4.8 ms4.8 ms
es/resolver_with_hygiene/typescript
crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
746.8 ms747 ms
html/parser/parser_document/stackoverflow_com_17_05_2022
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
22.7 ms22.7 ms
es/parser/mootools
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
11 ms11 ms
css/visitor/compare/visit_mut_span
crates/swc_css_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
5.1 ms5.1 ms
es/hygiene/typescript
crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
422.5 ms422.6 ms
css/parser/bootstrap_5_1_3
crates/swc_css_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
46.5 ms46.5 ms
es/lints/libs/echarts
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
114.3 ms114.3 ms
es/parser/underscore
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
2.4 ms2.4 ms
es/target/es2016
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
291.7 µs291.8 µs
es/target/es2018
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
309.9 µs309.9 µs
es/lexer/backbone
crates/swc_ecma_parser/benches/lexer.rs::benches::bench_files
CodSpeed Performance Gauge
0%
875.3 µs875.5 µs
es/target/es2017
crates/swc_ecma_transforms_typescript/benches/compat.rs::benches::version_group
CodSpeed Performance Gauge
0%
276.1 µs276.1 µs
html/document_fragment/visitor/compare/visit_mut_span_panic
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.1 ms1.1 ms
github
crates/swc_html_minifier/benches/full.rs::files_document_fragment::bench_files_document_fragment::html/minify/document_fragment
CodSpeed Performance Gauge
0%
41.7 ms41.7 ms
es/preset-env/usage/builtin_type
crates/swc_ecma_preset_env/benches/polyfills.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
244.3 µs244.4 µs
html/document/visitor/compare/fold_span_panic
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.2 ms1.2 ms
html/document/visitor/compare/visit_mut_span_panic
crates/swc_html_parser/benches/compare.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
1.1 ms1.1 ms
es/minifier/libs/lodash
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
114.6 ms114.6 ms
html/parser/parser_document_fragment/github_com_17_05_2022
crates/swc_html_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
22.5 ms22.5 ms
es/resolver/typescript
crates/swc_ecma_transforms_base/benches/base.rs::benches::bench_cases
CodSpeed Performance Gauge
0%
243.3 ms243.4 ms
es/lints/libs/three
crates/swc_ecma_lints/benches/all.rs::files::bench_files::es/lints/libs
CodSpeed Performance Gauge
0%
50.2 ms50.3 ms
es/minifier/libs/moment
crates/swc_ecma_minifier/benches/full.rs::bench_all::bench_libs::es/minifier/libs
CodSpeed Performance Gauge
0%
62.9 ms62.9 ms
es/parser/jquery
crates/swc_ecma_parser/benches/parser.rs::benches::bench_files
CodSpeed Performance Gauge
0%
14.1 ms14.1 ms
stackoverflow
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es/parser/colors
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es/codegen/colors
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es/preset-env/entry/import
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feat(es/transformer): Enhance TraverseCtx with essential transformation APIs ## Summary This PR enhances the TraverseCtx implementation with comprehensive APIs needed for AST transformations, based on oxc's TraverseCtx design. ## Changes ### TraverseCtx Enhancements **Ancestry Tracking APIs:** - `parent()` - Get immediate parent node - `ancestor(level)` - Get ancestor at specific depth - `find_ancestor(predicate)` - Find ancestor matching predicate - `ancestors_depth()` - Get current depth in AST - Expanded AncestorNode enum with Try, Catch, Switch, If, Conditional, Call, With **Context Predicates:** - `in_try()`, `in_catch()`, `in_switch()` - Query specific ancestor contexts - `in_class()`, `in_method()`, `in_with()` - Additional context checks - Existing: `in_function()`, `in_loop()`, `in_strict_mode()` **AST Node Creation Helpers:** - `create_ident()`, `create_ident_with_span()`, `create_ident_ref()` - Identifier creation - `create_member_expr()` - Member expression helper - `create_call_expr()` - Call expression helper - `create_var_declarator()`, `create_var_decl()` - Variable declarations - `create_assignment()` - Assignment expressions - `create_return_stmt()`, `create_expr_stmt()`, `create_block_stmt()` - Statements - `create_null()`, `create_undefined()`, `create_bool()`, `create_number()`, `create_string()`, `create_this()` - Literals **Transformation Utilities:** - `generate_unique_name()` - Generate identifiers avoiding conflicts - `is_valid_identifier()` - Validate identifier names against reserved words - `clear_identifier_metadata()`, `identifier_count()` - Metadata management ### Transformer Updates - Added automatic parent tracking for all relevant AST node types - HookAdapter now properly maintains ancestry stack during traversal - Tracks: Function, ArrowFunction, Class, Block, Loop variants, Try, Catch, Switch, If, Conditional, Call, With, Method ### Testing - Added comprehensive unit tests for all new functionality - 17 tests covering ancestry tracking, context predicates, helper generators, and utilities - All tests pass ### Documentation - Enhanced module-level documentation - Added detailed doc comments with examples for all public APIs - Updated lib.rs to describe new TraverseCtx capabilities ## Technical Notes - Follows CLAUDE.md guidelines (uses &str/Cow for Atoms where applicable) - No breaking changes to existing APIs - Performance-conscious: minimal allocations in hot paths - All compilation checks pass (cargo check, tests) - Code formatted with cargo fmt 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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