[committed 2/2] libstdc++: Add [[nodiscard]] to sequence containers

[Jonathan Wakely]

On 04/08/21 13:00 +0100, Jonathan Wakely wrote:
>On 04/08/21 12:56 +0100, Jonathan Wakely wrote:
>>... and container adaptors.
>>
>>This adds the [[nodiscard]] attribute to functions with no side-effects
>>for the sequence containers and their iterators, and the debug versions
>>of those containers, and the container adaptors,
>
>I don't plan to add any more [[nodiscard]] attributes for now, but
>these two commits should demonstrate how to do it for anybody who
>wants to contribute similar patches.

OK, one more change in this vein, adding [[nodiscard]] to <compare>.

Tested powerpc64le-linux, committed to trunk.


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