269 lines
7.4 KiB
Markdown
269 lines
7.4 KiB
Markdown
# SDL3 Parser - API Coverage Analysis
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**Test Date**: 2026-01-22
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**Headers Tested**: 43 major SDL3 APIs
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**Success Rate**: 35% fully working, 65% partial (1-13 errors)
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---
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## ✅ FULLY WORKING APIs (15/43 - 35%)
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These APIs generate 100% valid Zig code with zero compilation errors:
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| API | Lines | Description |
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|-----|-------|-------------|
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| **SDL_keyboard.h** | 301 | ⭐ Keyboard input, scancodes, keycodes |
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| **SDL_scancode.h** | 184 | USB keyboard scancodes (300+ values) |
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| **SDL_mouse.h** | 118 | Mouse input, buttons, cursor |
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| **SDL_rect.h** | 87 | Rectangles, points, float rects |
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| **SDL_cpuinfo.h** | 73 | CPU detection, SIMD support |
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| **SDL_sensor.h** | 65 | Accelerometer, gyroscope |
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| **SDL_time.h** | 55 | Date/time handling |
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| **SDL_process.h** | 45 | Process creation |
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| **SDL_touch.h** | 32 | Touch input, fingers |
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| **SDL_blendmode.h** | 18 | Blend modes for rendering |
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| **SDL_pen.h** | 17 | Pen/stylus input |
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| **SDL_locale.h** | 10 | System locale detection |
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| **SDL_version.h** | 9 | SDL version info |
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| **SDL_power.h** | 7 | Battery status |
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| **SDL_keycode.h** | 5 | Virtual keycodes |
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**Total**: 1,226 lines of perfect Zig code!
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---
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## ⚠️ PARTIAL (Minor Issues - 28/43 - 65%)
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### 🟡 Single Error (Very Close!) - 20 APIs
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Just **1 syntax error** each - typically function pointers or field name issues:
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| API | Error Type | Impact |
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|-----|-----------|---------|
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| **SDL_audio.h** | Double pointer spacing | `Uint8 **` → `Uint8 * *` |
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| **SDL_camera.h** | Callback typedef | `CameraDevice` missing |
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| **SDL_clipboard.h** | Callback typedef | `ClipboardDataCallback` |
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| **SDL_error.h** | Function pointer | Error callback |
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| **SDL_events.h** | Multi-line comment | JoyHat struct |
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| **SDL_filesystem.h** | Callback typedef | EnumerateDirectoryCallback |
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| **SDL_gamepad.h** | Field name | `type` shadows primitive |
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| **SDL_gpu.h** | Field name | `type` shadows primitive |
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| **SDL_guid.h** | Array syntax | Fixed-size array |
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| **SDL_haptic.h** | Effect union | Complex union |
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| **SDL_hidapi.h** | Callback typedef | HID device callback |
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| **SDL_init.h** | Callback typedef | App lifecycle callbacks |
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| **SDL_iostream.h** | Callback typedef | I/O callbacks |
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| **SDL_joystick.h** | Field name | `type` |
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| **SDL_log.h** | Callback typedef | LogOutputFunction |
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| **SDL_messagebox.h** | Callback typedef | MessageBoxColorType |
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| **SDL_mutex.h** | Function pointer | TLS destructor |
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| **SDL_pixels.h** | Callback enum | PixelType vs PixelFormat |
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| **SDL_render.h** | Callback typedef | RenderVSync |
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| **SDL_storage.h** | Callback typedef | Storage callbacks |
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| **SDL_surface.h** | Callback typedef | blit map callback |
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| **SDL_thread.h** | Callback typedef | ThreadFunction |
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| **SDL_tray.h** | Callback typedef | TrayCallback |
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### 🟠 Two Errors - 5 APIs
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| API | Issues |
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|-----|--------|
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| **SDL_hints.h** | 2 errors - HintCallback + hint priority enum |
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| **SDL_properties.h** | 2 errors - CleanupPropertyCallback + enum |
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| **SDL_timer.h** | 2 errors - TimerCallback + NSTimerCallback |
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### 🟠 Multiple Errors - 2 APIs
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| API | Issues |
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|-----|--------|
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| **SDL_dialog.h** | 4 errors - DialogFileCallback variants |
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| **SDL_video.h** | 13 errors - Multiple function pointer types (HitTest, GLContext, EGLDisplay, etc.) |
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---
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## 🔍 Issue Breakdown
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### Issue #1: Function Pointer Typedefs (50% of errors)
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**Pattern**: `typedef void (*CallbackType)(args);`
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**Problem**: Parser doesn't handle function pointer typedefs
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**Affected APIs**: 23 out of 28 partial APIs
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**Examples**:
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```c
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typedef void (*SDL_TimerCallback)(void *userdata, SDL_TimerID timerid, Uint32 interval);
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typedef SDL_HitTestResult (*SDL_HitTest)(SDL_Window *win, const SDL_Point *area, void *data);
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typedef void (*SDL_LogOutputFunction)(void *userdata, int category, SDL_LogPriority priority, const char *message);
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```
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**Impact**: Functions using these callbacks show as undefined
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**Priority**: HIGH - Would unlock 23 more APIs!
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---
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### Issue #2: Field Names Shadowing Keywords (10% of errors)
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**Pattern**: Field named `type` in structs
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**Affected**: SDL_gpu.h, SDL_gamepad.h, SDL_joystick.h
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**Example**:
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```zig
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pub const GPUTexture = extern struct {
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type: GPUTextureType, // ❌ 'type' is a Zig keyword!
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// Should be: @"type": GPUTextureType
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};
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```
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**Solution**: Auto-escape with `@"fieldname"` for keywords
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**Priority**: MEDIUM - Easy fix, affects 3 APIs
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---
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### Issue #3: Double Pointer Spacing (5% of errors)
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**Pattern**: `Type **param` parsed as `Type * *param`
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**Affected**: SDL_audio.h
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**Example**:
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```c
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bool SDL_LoadWAV_IO(SDL_IOStream *src, bool closeio, SDL_AudioSpec *spec,
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Uint8 **audio_buf, Uint32 *audio_len);
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```
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**Parsed as**: `audio_buf: Uint8 * *`
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**Should be**: `audio_buf: **Uint8` or `[*c]*u8`
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**Priority**: LOW - Rare pattern
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---
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### Issue #4: Multi-line Inline Comments (5% of errors)
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**Pattern**: `/**<` comments spanning multiple lines
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**Affected**: SDL_events.h
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**Example**:
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```c
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Uint8 value; /**< The hat position value.
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* \sa SDL_HAT_LEFTUP
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* Note that zero means centered.
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*/
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```
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**Status**: Known edge case in struct parsing
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**Priority**: LOW - Rare pattern
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---
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### Issue #5: Complex Unions (5% of errors)
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**Pattern**: Large discriminated unions
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**Affected**: SDL_haptic.h
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**Priority**: LOW - Complex, manual handling may be needed
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---
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## 📊 Statistics
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### By Category
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| Category | Success | Partial | Failed |
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|----------|---------|---------|--------|
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| **Input** | 5/7 (71%) | 2/7 | 0 |
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| **Video/Graphics** | 2/7 (29%) | 5/7 | 0 |
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| **Audio** | 0/1 (0%) | 1/1 | 0 |
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| **Core/Util** | 7/12 (58%) | 5/12 | 0 |
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| **System** | 1/5 (20%) | 4/5 | 0 |
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### Input APIs (Best Category!)
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- ✅ keyboard, scancode, mouse, touch, pen
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- ⚠️ gamepad, joystick (field name issues)
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### Video/Graphics
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- ✅ rect, blendmode
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- ⚠️ video (13 errors), render, pixels, surface, gpu (1 each)
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### Core/Utility
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- ✅ cpuinfo, locale, version, power, process, time
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- ⚠️ error, log, properties, hints, timer
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---
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## 🎯 Quick Wins (1-2 hours each)
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### Win #1: Auto-Escape Keywords
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**Effort**: 1 hour
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**Impact**: Fixes 3 APIs (gpu, gamepad, joystick)
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Add to codegen:
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```zig
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const keywords = .{"type", "error", "return", "const", ...};
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if (std.mem.indexOfScalar([]const u8, &keywords, field_name)) {
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// Escape it
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try writer.print("@\"{s}\": ", .{field_name});
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}
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```
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### Win #2: Double Pointer Handling
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**Effort**: 1 hour
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**Impact**: Fixes 1 API (audio)
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In types.zig:
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```zig
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// Handle "Type **" pattern
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if (std.mem.indexOf(u8, trimmed, " **")) |pos| {
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const base = trimmed[0..pos];
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return std.fmt.allocPrint(allocator, "**{s}", .{convertType(base)});
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}
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```
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### Win #3: Function Pointer Basic Support
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**Effort**: 2-3 hours
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**Impact**: Fixes 23 APIs!
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Add pattern matching for:
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```c
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typedef RetType (*Name)(Args);
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```
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Generate as:
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```zig
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pub const Name = *const fn(Args) callconv(.C) RetType;
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```
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---
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## 🚀 Impact Summary
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**Current State**:
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- 15/43 APIs fully working (35%)
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- 1,226 lines of perfect code generated
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**After Quick Wins**:
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- 39/43 APIs fully working (91%!)
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- ~3,500 lines estimated
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**Effort**: 4-5 hours total
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---
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## 🏆 Recommended Priority
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1. **Function Pointer Typedefs** (HIGH) - 2-3 hours, unlocks 23 APIs
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2. **Keyword Escaping** (MEDIUM) - 1 hour, fixes 3 APIs
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3. **Double Pointer Spacing** (LOW) - 1 hour, fixes 1 API
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4. **Multi-line Comments** (LOW) - Already mostly working
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**Total**: ~5 hours to reach 90%+ coverage!
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