From 351c593f5e2af7a3539303abe8281ce4780c9af3 Mon Sep 17 00:00:00 2001
From: Anders Elfgren <srekel@gmail.com>
Date: Sun, 24 Dec 2023 05:58:11 +0100
Subject: [PATCH 1/2] Added support for function typedefs.

Tested on RecastAssert.h
-fparse-all-comments was needed to make sure all of the comments for it was included in the AST, not sure why.
---
 src/Transpiler.zig | 51 ++++++++++++++++++++++++++++++++++++++++------
 src/main.zig       |  1 +
 2 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/src/Transpiler.zig b/src/Transpiler.zig
index 0d44c7d..6127ce0 100644
--- a/src/Transpiler.zig
+++ b/src/Transpiler.zig
@@ -1594,13 +1594,10 @@ fn visitTypedefDecl(self: *Self, value: *const json.Value) !void {
     self.nodes_visited += 1;
 
     const name = value.object.get("name").?.string;
+    const v_inner_opt = value.object.getPtr("inner");
+    try self.writeDocs(v_inner_opt);
 
-    if (value.object.get("inner")) |v_inner| {
-        if (v_inner.array.items.len != 1) {
-            log.err("complex typedef `{s}`", .{name});
-            return;
-        }
-
+    if (v_inner_opt) |v_inner| {
         const v_item = &v_inner.array.items[0];
         const tag = v_item.object.get("kind").?.string;
         if (mem.eql(u8, tag, "BuiltinType") or mem.eql(u8, tag, "TypedefType")) {
@@ -1652,6 +1649,16 @@ fn visitTypedefDecl(self: *Self, value: *const json.Value) !void {
             self.nodes_visited += 1;
             try self.out.print("pub const {s} = {s};\n\n", .{ name, typeQualifier(v_item).? });
             return;
+        } else if (mem.eql(u8, tag, "ParenType")) {
+            self.nodes_visited += 1;
+            const parentype_inner_opt = v_inner.array.items[0].object.getPtr("inner");
+            if (parentype_inner_opt) |parentype_inner| {
+                const parentype_inner_kind = parentype_inner.array.items[0].object.get("kind").?.string;
+                if (mem.eql(u8, parentype_inner_kind, "FunctionProtoType")) {
+                    try self.visitFunctionProtoType(name, &parentype_inner.array.items[0]);
+                }
+            }
+            return;
         } else {
             log.err("unhandled `{s}` in typedef `{s}`", .{ tag, name });
             return;
@@ -1664,6 +1671,38 @@ fn visitTypedefDecl(self: *Self, value: *const json.Value) !void {
     }
 }
 
+fn visitFunctionProtoType(self: *Self, name: []const u8, value: *const json.Value) !void {
+    self.nodes_visited += 1;
+
+    try self.out.print("pub const {s} = fn(", .{name});
+
+    var return_type_opt: ?*const json.Value = null;
+    var inner_opt = value.object.getPtr("inner");
+    if (inner_opt) |inner| {
+        for (inner.array.items, 0..) |*item, i| {
+            if (return_type_opt == null) {
+                return_type_opt = item;
+                continue;
+            }
+
+            const zig_type = try self.transpileType(typeQualifier(item).?);
+            defer self.allocator.free(zig_type);
+            try self.out.print("{s}", .{zig_type});
+            if (i + 1 < inner.array.items.len) {
+                try self.out.print(", ", .{});
+            }
+        }
+    }
+
+    if (return_type_opt) |return_type| {
+        const zig_type = try self.transpileType(typeQualifier(return_type).?);
+        defer self.allocator.free(zig_type);
+        try self.out.print(") callconv(.C) {s};\n\n", .{zig_type});
+    } else {
+        try self.out.print(") callconv(.C) {s};\n\n", .{"void"});
+    }
+}
+
 fn visitNamespaceDecl(self: *Self, value: *const json.Value) !void {
     if (self.shouldSkip(value)) {
         self.nodes_visited += nodeCount(value);
diff --git a/src/main.zig b/src/main.zig
index 48f950f..7082824 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -27,6 +27,7 @@ pub fn main() !void {
     try clang.append("-Xclang");
     try clang.append("-ast-dump=json");
     try clang.append("-fsyntax-only");
+    try clang.append("-fparse-all-comments");
 
     const argv = try std.process.argsAlloc(allocator);
     defer std.process.argsFree(allocator, argv);

From 408318cfb6f77552bf17ba0d15facde1b0a3107d Mon Sep 17 00:00:00 2001
From: Anders Elfgren <srekel@gmail.com>
Date: Tue, 26 Dec 2023 21:28:28 +0100
Subject: [PATCH 2/2] var -> const fix

---
 src/Transpiler.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Transpiler.zig b/src/Transpiler.zig
index 6127ce0..2199cf3 100644
--- a/src/Transpiler.zig
+++ b/src/Transpiler.zig
@@ -1677,7 +1677,7 @@ fn visitFunctionProtoType(self: *Self, name: []const u8, value: *const json.Valu
     try self.out.print("pub const {s} = fn(", .{name});
 
     var return_type_opt: ?*const json.Value = null;
-    var inner_opt = value.object.getPtr("inner");
+    const inner_opt = value.object.getPtr("inner");
     if (inner_opt) |inner| {
         for (inner.array.items, 0..) |*item, i| {
             if (return_type_opt == null) {