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std.zig.c_translation: fix function pointer casting

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Jonathan Gautheron 2025-03-14 22:04:42 +01:00 committed by Alex Rønne Petersen
parent 6c690a966a
commit 18b821666e
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1 changed files with 14 additions and 0 deletions
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lib/std/zig/c_translation.zig
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@ -88,6 +88,9 @@ fn castToPtr(comptime DestType: type, comptime SourceType: type, target: anytype
.pointer => {
return castPtr(DestType, target);
},
.@"fn" => {
return castPtr(DestType, &target);
},
.optional => |target_opt| {
if (@typeInfo(target_opt.child) == .pointer) {
return castPtr(DestType, target);
@ -686,3 +689,14 @@ test "Extended C ABI casting" {
try testing.expect(@TypeOf(Macros.L_SUFFIX(math.maxInt(c_long) + 1)) == c_longlong); // comptime_int -> c_longlong
}
}
// Function with complex signature for testing the SDL case
fn complexFunction(_: ?*anyopaque, _: c_uint, _: ?*const fn (?*anyopaque) callconv(.c) c_uint, _: ?*anyopaque, _: c_uint, _: [*c]c_uint) callconv(.c) usize {
return 0;
}
test "function pointer casting" {
const SDL_FunctionPointer = ?*const fn () callconv(.c) void;
const fn_ptr = cast(SDL_FunctionPointer, complexFunction);
try testing.expect(fn_ptr != null);
}