[PATCH] gcc/doc: Clarify warning for variable unused

[Jakub Jelinek]

On Fri, May 01, 2026 at 09:40:49AM -0400, Nathan Myers wrote:
> [Guessing this should be in the 16.x branch too.]
> 
> In the www gcc-16/porting_to, two lines in comment text on
> the example code for -Wunused-variable was changed from
> "pre/postincrement used" to "pre/postincrement result used".
> Approval there directs that the change should be propagated
> back to the texi source the example came from. This is that
> propagation.
> 
> gcc/Changelog:
> 	* doc/invoke.texi: insert "result" in comment text
> ---
>  gcc/doc/invoke.texi | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

LGTM, both for trunk and 16.2.

Thanks.

> diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> index bebe20c5e0b..63e1a3bbc56 100644
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -8319,10 +8319,10 @@ void foo (void)
>    int f = 0; // No warning, f used
>    int g = f = 5;
>    (void) g;
> -  int h = 0; // No warning, preincrement used
> +  int h = 0; // No warning, preincrement result used
>    int i = ++h;
>    (void) i;
> -  int j = 0; // No warning, postdecrement used
> +  int j = 0; // No warning, postdecrement result used
>    int k = j--;
>    (void) k;
>    int l = 0; // No warning, l used
> -- 
> 2.53.0

	Jakub