[Mesa-dev] [PATCH 01/15] glsl: Add __FILE__ and __LINE__ as built-in macros

[Matt Turner]

On Fri, Jun 6, 2014 at 4:56 PM, Anuj Phogat <anuj.phogat at gmail.com> wrote:
> A compile error will be generated for redefinition of these macros.
>
> Cc: <mesa-stable at lists.freedesktop.org>
> Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
> ---
>  src/glsl/glcpp/glcpp-parse.y | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/src/glsl/glcpp/glcpp-parse.y b/src/glsl/glcpp/glcpp-parse.y
> index 9887583..2ddc8b9 100644
> --- a/src/glsl/glcpp/glcpp-parse.y
> +++ b/src/glsl/glcpp/glcpp-parse.y
> @@ -2053,6 +2053,8 @@ _glcpp_parser_handle_version_declaration(glcpp_parser_t *parser, intmax_t versio
>
>         parser->version_resolved = true;
>
> +       add_builtin_define (parser, "__FILE__", version);
> +       add_builtin_define (parser, "__LINE__", version);

In order to give an error on redefinition of these, we define them to
something meaningless, i.e., version?

I guess that works, since we have special handling of their expansion.
Wouldn't it be better to handle them specially like we do in patch #2?

>         add_builtin_define (parser, "__VERSION__", version);