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diff --git a/js/scripting-lang/IMPLEMENTATION_DISCREPANCIES.md b/js/scripting-lang/IMPLEMENTATION_DISCREPANCIES.md new file mode 100644 index 0000000..cb7bb82 --- /dev/null +++ b/js/scripting-lang/IMPLEMENTATION_DISCREPANCIES.md @@ -0,0 +1,171 @@ +# Baba Yaga Implementation Discrepancies Analysis + +## 📊 Test Results Summary + +| Implementation | Unit Tests | Integration Tests | Turing Tests | Total | Success Rate | +|----------------|------------|-------------------|--------------|-------|--------------| +| **JavaScript** | 23/23 (100%) | 4/4 (100%) | 1/7 (14%) | 28/34 | **82%** | +| **C** | 16/23 (70%) | 3/4 (75%) | 5/7 (71%) | 25/34 | **74%** | + +## 🔍 Category 1: JavaScript-Specific Issues +*Tests that pass in C but fail in JavaScript* + +### 1.1 Variable Naming Conflicts + +**Test**: `tests/turing-completeness/01_basic_proof.txt` +- **Error**: `Cannot reassign immutable variable: apply` +- **Cause**: JS implementation has a built-in `apply` function +- **Impact**: Prevents testing higher-order functions +- **Solution**: Rename `apply` to `apply_func` or similar in test + +### 1.2 Array/List Syntax Issues + +**Tests**: Multiple Turing completeness tests +- **Error**: `Unexpected token in parsePrimary: LEFT_BRACKET` +- **Cause**: JS implementation doesn't support array literal syntax `[]` +- **Impact**: Cannot create empty arrays or use array concatenation +- **Examples**: + - `result: []` (empty array initialization) + - `state.result concat [state.count]` (array concatenation) + +### 1.3 Advanced Pattern Matching + +**Tests**: `05_loops_and_state.txt`, `06_lambda_calculus.txt`, `07_complex_algorithms.txt` +- **Error**: Various parsing errors for advanced syntax +- **Cause**: JS implementation doesn't support: + - List concatenation operators + - Complex pattern matching with arrays + - Some lambda calculus constructs + +## 🔍 Category 2: C-Specific Issues +*Tests that pass in JavaScript but fail in C* + +### 2.1 IO Operations Support + +**Test**: `tests/unit/05_io_operations.txt` +- **Error**: `Testing IO operationsError: Execution failed` +- **Cause**: C implementation may not fully support `..out` or `..assert` directives +- **Impact**: Basic testing and output functionality missing + +### 2.2 Function Reference Syntax + +**Test**: `tests/unit/08_first_class_functions.txt` +- **Error**: `Parse error: Unexpected token in expression` +- **Cause**: C implementation doesn't support `@function` reference syntax +- **Impact**: Cannot pass functions as values or implement higher-order functions + +### 2.3 Advanced Table Operations + +**Test**: `tests/unit/17_table_enhancements.txt` +- **Error**: `Parse error: Expected ',' or '}' in table literal` +- **Cause**: C implementation doesn't support: + - Complex table literals + - Array-style table access `table[index]` + - Advanced table combinators + +### 2.4 Via Operator + +**Test**: `tests/unit/20_via_operator.txt` +- **Error**: `Parse error: Unexpected token in expression` +- **Cause**: C implementation doesn't support the `via` operator syntax +- **Impact**: Missing pipeline/composition operator + +### 2.5 Embedded Functions + +**Test**: `tests/unit/19_embedded_functions.txt` +- **Error**: `Parse error: Expected ',' or '}' in table literal` +- **Cause**: C implementation doesn't support functions embedded in table literals +- **Impact**: Limited functional programming capabilities + +### 2.6 Advanced Functional Programming + +**Test**: `tests/unit/16_function_composition.txt` +- **Error**: Complex output suggests memory/evaluation issues +- **Cause**: C implementation has problems with: + - Function composition chains + - Partial application + - Complex function evaluation + +### 2.7 Integration Test Failures + +**Test**: `tests/integration/integration_03_functional_programming.txt` +- **Error**: `Parse error: Unexpected token in expression` +- **Cause**: Advanced functional programming constructs not supported + +## 🔍 Category 3: Implementation Gaps Summary + +### JavaScript Implementation Limitations: +1. **Array Syntax**: No support for `[]` array literals +2. **List Operations**: No `concat` operator for arrays +3. **Built-in Conflicts**: `apply` function already exists +4. **Advanced Patterns**: Limited lambda calculus support + +### C Implementation Limitations: +1. **IO Directives**: `..out` and `..assert` not fully implemented +2. **Function References**: `@function` syntax not supported +3. **Table Operations**: Limited table literal parsing +4. **Via Operator**: Pipeline operator missing +5. **Embedded Functions**: Functions in tables not supported +6. **Memory/Evaluation**: Issues with complex function chains + +## 📋 Prioritized Action Plan + +### Phase 1: Critical Core Features (Both Implementations) +1. **Fix IO Operations** (C): Implement `..out` and `..assert` properly +2. **Fix Function References** (C): Implement `@function` syntax +3. **Fix Array Literals** (JS): Implement `[]` syntax and `concat` operator +4. **Resolve Naming Conflicts** (Tests): Rename conflicting identifiers + +### Phase 2: Advanced Features (Implementation-Specific) +1. **Table Enhancements** (C): Improve table literal parsing +2. **Via Operator** (C): Implement pipeline operator +3. **Embedded Functions** (C): Support functions in table literals +4. **Lambda Calculus** (JS): Improve advanced pattern support + +### Phase 3: Optimization and Polish +1. **Function Composition** (C): Fix memory/evaluation issues +2. **Performance** (Both): Optimize complex function chains +3. **Error Messages** (Both): Improve parsing error reporting + +## 🎯 Immediate Recommendations + +### For Maximum Compatibility: +1. **Update Test Files**: Remove advanced syntax not supported by either implementation +2. **Fix Critical Gaps**: Focus on core features both implementations should support +3. **Establish Feature Baseline**: Define minimum feature set both must support + +### Test File Modifications Needed: +1. Replace `apply` with `apply_func` in Turing tests +2. Replace array literals `[]` with table-based alternatives +3. Replace `concat` operations with table merging +4. Simplify lambda calculus examples to supported syntax + +## 📈 Success Metrics + +**Target**: Both implementations should achieve 90%+ test pass rate on core features + +**Core Feature Set** (both must support): +- ✅ Arithmetic operations +- ✅ Comparison operators +- ✅ Basic functions +- ✅ Case expressions +- ✅ Basic tables +- ⚠️ Function references (`@function`) +- ⚠️ IO operations (`..out`, `..assert`) +- ⚠️ Basic higher-order functions + +**Advanced Features** (implementation-specific): +- 🔄 Via operator +- 🔄 Array literals +- 🔄 Complex table operations +- 🔄 Embedded functions +- 🔄 Advanced lambda calculus + +## 💡 Next Steps + +1. **Immediate**: Fix critical core features to achieve basic compatibility +2. **Short-term**: Modify test files to work within current limitations +3. **Medium-term**: Implement missing features in both implementations +4. **Long-term**: Achieve full feature parity between implementations + +The goal is to ensure both implementations support the same core language features with identical behavior, using the JavaScript implementation as the reference standard. \ No newline at end of file |