[PATCH] D21185: [clang-tidy] Add performance-emplace-into-containers

[Vedant Kumar via cfe-commits]

vsk created this revision.
vsk added reviewers: aaron.ballman, alexfh.
vsk added a subscriber: cfe-commits.

Introduce a check which suggests when it might be helpful to use "emplace" methods. The initial version only works with std::vector and push_back (e.g `V.push_back(T(1, 2))` -> `V.emplace_back(1, 2)`). It could be extended to work with other containers and methods.

http://reviews.llvm.org/D21185

Files:
  clang-tidy/performance/CMakeLists.txt
  clang-tidy/performance/EmplaceCheck.cpp
  clang-tidy/performance/EmplaceCheck.h
  clang-tidy/performance/PerformanceTidyModule.cpp
  test/clang-tidy/performance-emplace-into-containers.cpp

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