# Language Completeness Status Audit - 2025-10-09

## Executive Summary

**CRITICAL FINDING**: Only **27/61 examples (44%)** pass all 3 key tools (check/run/wasm)

**Reality Check**: While roadmap shows all LANG-COMP-001 through LANG-COMP-015 as "COMPLETE", this audit reveals **WASM compilation fails for 56% of examples**.

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## Test Methodology

**Tools Tested**: `ruchy check`, `ruchy run`, `ruchy wasm` (3 of 15 tools)
- **check**: Syntax validation (parser)
- **run**: Interpreter execution (runtime)
- **wasm**: WebAssembly compilation (backend)

**Total Examples**: 61 Ruchy files across 15 language feature categories

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## Results by Category

### ✅ FULLY WORKING (All examples pass check/run/wasm)

| Category | Examples | Status |
|----------|----------|--------|
| **01-basic-syntax** | 4/4 | ✅ 100% |
| **02-operators** | 4/4 | ✅ 100% |
| **03-control-flow** | 5/5 | ✅ 100% |
| **04-functions** | 4/4 | ✅ 100% |
| **05-string-interpolation** | 4/4 | ✅ 100% |

**Subtotal**: **21/21 examples (100%)** in core features

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### ⚠️ PARTIALLY WORKING (check/run pass, WASM fails)

| Category | Pass | Fail | % Working |
|----------|------|------|-----------|
| **06-data-structures** | 0/4 | 4/4 | 0% WASM |
| **07-type-annotations** | 1/4 | 3/4 | 25% WASM |
| **08-methods** | 0/4 | 4/4 | 0% WASM |
| **09-pattern-matching** | 1/4 | 3/4 | 25% WASM |
| **10-closures** | 0/4 | 4/4 | 0% WASM |
| **11-ranges** | 2/4 | 2/4 | 50% WASM |
| **12-error-handling** | 1/4 | 3/4 | 25% WASM |
| **13-tuples** | 0/4 | 4/4 | 0% WASM |
| **14-structs** | 0/3 | 3/3 | 0% WASM |
| **15-enums** | 1/5 | 4/5 | 20% WASM |

**Subtotal**: **6/40 examples (15%)** compile to WASM

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### ❌ BROKEN (check/run also fail)

| File | Tools Failing |
|------|---------------|
| **15-enums/04_enum_discriminants.ruchy** | check, run, wasm |

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## Critical Gap Analysis

### WASM Backend is Incomplete

**Root Cause**: WASM compiler (`src/backend/wasm/mod.rs`) supports only basic features:
- ✅ Literals (integers, floats, booleans, strings)
- ✅ Binary operations (arithmetic, comparison, logical)
- ✅ Control flow (if, match, loops with break/continue)
- ✅ Functions (declaration, parameters, returns)
- ✅ String interpolation (f-strings)
- ❌ **Arrays** - Not implemented in WASM backend
- ❌ **Dictionaries/Maps** - Not implemented in WASM backend
- ❌ **Tuples** (partial) - Memory model exists but limited
- ❌ **Structs** - Not implemented in WASM backend
- ❌ **Enums** (partial) - Basic enums work, complex variants fail
- ❌ **Closures** - Not implemented in WASM backend
- ❌ **Methods** - Not implemented in WASM backend
- ❌ **Type annotations** - Parser works, WASM ignores types

### Interpreter is Complete

**Good News**: `ruchy run` executes **60/61 examples successfully** (98% pass rate)
- Only 1 failure: `15-enums/04_enum_discriminants.ruchy` (parser issue)

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## Detailed Failure List

### 06-data-structures (0/4 WASM pass)
- ❌ `01_arrays.ruchy` - Arrays not implemented in WASM
- ❌ `02_dictionaries.ruchy` - Dictionaries not implemented in WASM
- ❌ `03_tuples.ruchy` - Complex tuple operations not implemented
- ❌ `04_destructuring.ruchy` - Destructuring not fully implemented in WASM

### 07-type-annotations (1/4 WASM pass)
- ❌ `01_basic_types.ruchy` - Type annotations ignored by WASM
- ✅ `02_function_types.ruchy` - Works (function types ignored but code compiles)
- ❌ `03_collection_types.ruchy` - Collection types not implemented in WASM
- ❌ `04_type_inference.ruchy` - Type inference not implemented in WASM

### 08-methods (0/4 WASM pass)
- ❌ `01_string_methods.ruchy` - String methods not implemented in WASM
- ❌ `02_array_methods.ruchy` - Array methods not implemented in WASM
- ❌ `03_integer_methods.ruchy` - Integer methods not implemented in WASM
- ❌ `04_chaining_methods.ruchy` - Method chaining not implemented in WASM

### 09-pattern-matching (1/4 WASM pass)
- ✅ `01_literal_patterns.ruchy` - Basic match works
- ❌ `02_variable_patterns.ruchy` - Variable binding in patterns incomplete
- ❌ `03_tuple_patterns.ruchy` - Tuple patterns not implemented
- ❌ `04_destructuring.ruchy` - Destructuring patterns not implemented

### 10-closures (0/4 WASM pass)
- ❌ `01_basic_closures.ruchy` - Closures not implemented in WASM
- ❌ `02_closure_captures.ruchy` - Capture not implemented
- ❌ `03_closure_returns.ruchy` - Closure returns not implemented
- ❌ `04_higher_order_functions.ruchy` - Higher-order functions not implemented

### 11-ranges (2/4 WASM pass)
- ✅ `01_basic_ranges.ruchy` - Basic range works
- ❌ `02_range_iteration.ruchy` - Range iteration incomplete
- ❌ `03_range_variables.ruchy` - Range variables incomplete
- ✅ `04_range_patterns.ruchy` - Range patterns work

### 12-error-handling (1/4 WASM pass)
- ❌ `01_result_type.ruchy` - Result type not implemented in WASM
- ❌ `02_option_type.ruchy` - Option type not implemented in WASM
- ✅ `03_try_catch.ruchy` - Try/catch basic support works
- ❌ `04_error_propagation.ruchy` - Error propagation not implemented

### 13-tuples (0/4 WASM pass)
- ❌ `01_basic_tuples.ruchy` - Tuple operations incomplete
- ❌ `02_tuple_destructuring.ruchy` - Destructuring incomplete
- ❌ `03_tuple_functions.ruchy` - Tuple function parameters incomplete
- ❌ `04_nested_tuples.ruchy` - Nested tuples incomplete

### 14-structs (0/3 WASM pass)
- ❌ `01_basic_structs.ruchy` - Structs not implemented in WASM
- ❌ `02_struct_methods.ruchy` - Struct methods not implemented
- ❌ `03_tuple_structs.ruchy` - Tuple structs not implemented

### 15-enums (1/5 WASM pass)
- ✅ `01_basic_enums.ruchy` - Basic enums work
- ❌ `02_enum_matching.ruchy` - Enum matching incomplete
- ❌ `03_enum_with_data.ruchy` - Enums with data not implemented
- ❌ `04_enum_discriminants.ruchy` - **BROKEN** (parser fails)
- ❌ `04_enum_mixed.ruchy` - Mixed enums not implemented

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## Recommendations

### Immediate Actions (Toyota Way: Stop the Line)

1. **Update Roadmap to Reflect Reality**
   - LANG-COMP-001 through LANG-COMP-005: ✅ COMPLETE (100% all tools)
   - LANG-COMP-006 through LANG-COMP-015: ⚠️ INTERPRETER ONLY (0-25% WASM)
   - Create new tickets: WASM-DATA-STRUCTURES, WASM-METHODS, etc.

2. **Fix Critical Parser Bug**
   - `15-enums/04_enum_discriminants.ruchy` fails check/run/wasm
   - This is a **P0 defect** - advertised feature doesn't work

3. **WASM Backend Roadmap**
   - Priority 1: Arrays (blocking 06-data-structures)
   - Priority 2: Structs (blocking 14-structs)
   - Priority 3: Methods (blocking 08-methods)
   - Priority 4: Closures (blocking 10-closures)
   - Priority 5: Advanced tuples (blocking 13-tuples)

### Long-term Strategy

**Option A**: Accept WASM limitations, document clearly
- Update docs to show "Interpreter: ✅ WASM: ❌" for each feature
- Focus on interpreter quality
- WASM is experimental/limited subset

**Option B**: Full WASM implementation (6-12 months)
- Complete WASM backend for ALL language features
- Requires significant architecture work
- Memory model, type system, closures, etc.

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## Toyota Way Violation

**Jidoka Principle Violated**: We marked features as "COMPLETE" without verifying all tools work.

**Genchi Genbutsu Applied**: This audit goes to the source (runs actual tools) to see reality.

**Kaizen Action**: Establish automated testing of ALL examples with ALL tools in CI/CD.

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## Conclusion

**Current State**: Ruchy has **excellent interpreter** (98% examples work) but **incomplete WASM backend** (44% examples work).

**Transparency**: Roadmap should reflect this reality, not claim 100% completion.

**Next Steps**:
1. Fix parser bug (enum discriminants)
2. Update roadmap with accurate status
3. Decide: Accept WASM limitations OR invest in full implementation

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**Generated**: 2025-10-09
**Audit Tool**: `ruchy check/run/wasm` on 61 examples
**Reality**: 27/61 (44%) pass all tools, 34/61 (56%) fail WASM compilation
