fn wcsstr(noalias haystack: [*:0]const wchar_t, noalias needle: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t
fn wcsstr(noalias haystack: [*:0]const wchar_t, noalias needle: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t { return @constCast(haystack[std.mem.find(wchar_t, std.mem.span(haystack), std.mem.span(needle)) orelse return null ..]); }