hakorune/tools/hako_check/tests/HC015_arity_mismatch/expected.json

{"diagnostics":[
  {"file":"ng.hako","line":1,"rule":"HC015","message":"[HC015] arity mismatch: Calculator.add expects 2 arguments, got 0 :: Calculator.add/0","quickFix":"","severity":"warning"},
  {"file":"ng.hako","line":1,"rule":"HC015","message":"[HC015] arity mismatch: Helper.double expects 1 arguments, got 2 :: Helper.double/2","quickFix":"","severity":"warning"}
]}
Implement HC015: Arity Mismatch detection (MVP) ## Overview Detects method calls with incorrect number of arguments (arity mismatch). MVP version focuses on clear `Box.method()` calls with wrong arity. ## Implementation Details - Rule: `rule_arity_mismatch.hako` following box principles - Detection Method: IR-based analysis using arity inference - Leverages `analysis_consumer.hako`'s `_infer_call_arity()` (already implemented) - Compares called arity vs. defined arity from methods[] - Reports mismatches as HC015 warnings - Integration: Added to cli.hako in IR-based rules section ## Technical Approach - Arity Parsing: Extracts arity from qualified names (`Box.method/arity`) - Method Lookup: Searches methods[] for matching Box.method definition - Mismatch Detection: Compares called arity vs. expected arity - MVP Scope: Detects clear cases only (skips plugin/external methods if not found) ## Helper Methods - `_parse_qualified()`: Parses `Box.method/arity` into components (MapBox result) - `_find_method_arity()`: Searches methods[] for Box.method definition arity - `_itoa()` / `_atoi()`: Integer conversion utilities ## Test Cases - ok.hako: All calls match definitions - `Calculator.add(1, 2)` → matches `add/2` - `Helper.double(5)` → matches `double/1` - ng.hako: Arity mismatches - `Calculator.add()` → expects `add/2`, got `add/0` - `Helper.double(1, 2)` → expects `double/1`, got `double/2` ## Test Results ``` [TEST/OK] HC011_dead_methods [TEST/OK] HC012_dead_static_box [TEST/OK] HC013_duplicate_method [TEST/OK] HC014_missing_entrypoint [TEST/OK] HC015_arity_mismatch ← NEW [TEST/OK] HC016_unused_alias [TEST/OK] HC017_non_ascii_quotes [TEST/OK] HC018_top_level_local [TEST/SUMMARY] all green ``` ## Diagnostic Format ``` [HC015] arity mismatch: Box.method expects N arguments, got M :: Box.method/M ``` ## Architecture - Box-first design: RuleArityMismatchBox with single responsibility - IR-based: Uses analysis_consumer's arity inference (no duplication) - Clean separation: parsing, lookup, comparison, reporting ## Dependencies - Relies on `analysis_consumer.hako`'s `_infer_call_arity()` implementation - Fixed parser_core.hako arity bug (HC013 commit) ensures accuracy 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> 2025-11-08 03:19:08 +09:00			`{"diagnostics":[`
			`{"file":"ng.hako","line":1,"rule":"HC015","message":"[HC015] arity mismatch: Calculator.add expects 2 arguments, got 0 :: Calculator.add/0","quickFix":"","severity":"warning"},`
			`{"file":"ng.hako","line":1,"rule":"HC015","message":"[HC015] arity mismatch: Helper.double expects 1 arguments, got 2 :: Helper.double/2","quickFix":"","severity":"warning"}`
			`]}`