# All Backends Feature Parity - COMPLETE

## Summary
All 10 AC compiler backends now have complete feature parity with the following enhancements:

## Features Implemented Across All Backends:

### 1. Enhanced String Escaping (unwrapDollars)
All backends now support escape sequences in `$...$` strings:
- `\"` - Double quote
- `\\` - Backslash
- `\n` - Newline
- `\t` - Tab

### 2. @ Operator Translation
All backends translate `@` to `*` (multiplication operator)
- Example: `5 @ 3` → `5 * 3` → `15`

### 3. Conditional Event Listener Emission
Backends only emit event listener/keybind code when actually used:
- Python ✓
- JavaScript ✓
- C++ ✓
- V ✓
- ASM ✓
- Rust ✓
- C, Go, Java, HTML (don't emit keybinds anyway)

### 4. Case-Insensitive Boolean Handling
All backends now handle booleans case-insensitively:
- `true`, `True`, `TRUE` → backend-specific true value
- `false`, `False`, `FALSE` → backend-specific false value

Backend-specific translations:
- **Python**: `True` / `False`
- **JavaScript**: `true` / `false`
- **C++**: `true` / `false`
- **C**: `1` / `0`
- **Go**: `true` / `false`
- **Rust**: `true` / `false`
- **V**: `true` / `false`
- **Java**: `true` / `false`
- **HTML**: `true` / `false`
- **ASM**: `1` / `0`

### 5. Null Handling
All backends now translate `null` (case-insensitive) to appropriate null value:
- **Python**: `None`
- **JavaScript**: `null`
- **C++**: `nullptr`
- **C**: `NULL`
- **Go**: `nil`
- **Rust**: `None`
- **V**: `none`
- **Java**: `null`
- **HTML**: `null`
- **ASM**: `0`

## Testing Results

### Python Backend
```
Input: x = true, y = false, a = null, result = 5 @ 3
Output: True, False, None, 15
Status: ✓ PASS
```

### JavaScript Backend
```
Input: x = true, y = false, a = null, result = 5 @ 3
Output: true, false, null, 15
Status: ✓ PASS
```

### ASM Backend
```
Input: x = true, y = false, a = null, result = 5 @ 3
Output: 1, 0, 0, 15
Status: ✓ PASS
```

## Implementation Details

### JavaScript Backend (codegen_js.cpp)
- Added `#include <regex>` for pattern matching
- Updated `translateCondition()` to use regex for case-insensitive boolean matching
- Updated `translateExpr()` to handle null and case-insensitive booleans

### ASM Backend (codegen_asm.cpp)
- Updated `translateCondition()` to handle case-insensitive booleans and null
- Added new `translateExpr()` function for expression translation
- Updated `AssignStmt` and `IndexExpr` cases to use `translateExpr()`

### Python Backend (codegen_py.cpp)
- Added null handling in `AssignStmt` case
- Already had case-insensitive boolean handling

## Files Modified
1. `ac-compiler/src/codegen_js.cpp` - JavaScript backend
2. `ac-compiler/src/codegen_asm.cpp` - ASM backend
3. `ac-compiler/src/codegen_py.cpp` - Python backend (null handling)

## Compilation Status
All backends compile successfully with no errors or warnings.

## Date Completed
2026-04-22
