[PATCH][libstdc++-v3 parallel mode] Enable user-defined swap

[Johannes Singler]

On 01/24/2011 06:07 PM, Johannes Singler wrote:
> The following patch enables user-defined swap for parallel sorting
> and the like, which can improve performance.

There was still one "using std::swap" missing.

Tested x86_64-unknown-linux-gnu: No regressions

Committed to mainline as obvious.

2011-02-11  Johannes Singler  <singler@kit.edu>

         PR libstdc++/47433
         * include/parallel/losertree.h
         (_LoserTreeUnguarded<>::__delete_min_insert):
         Add missing "using std::swap;", as for other variants.

Johannes
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