[PATCH] D19146: [clang-tidy] New checker to detect suspicious string constructor.

[Etienne Bergeron via cfe-commits]

etienneb created this revision.
etienneb added a reviewer: alexfh.
etienneb added a subscriber: cfe-commits.

Checker to validate string constructor parameters.

A common mistake is to swap parameter for the fill-constructor.
```
  std::string str('x', 4);
  std::string str('4', x);
```

http://reviews.llvm.org/D19146

Files:
  clang-tidy/misc/CMakeLists.txt
  clang-tidy/misc/MiscTidyModule.cpp
  clang-tidy/misc/StringConstructorCheck.cpp
  clang-tidy/misc/StringConstructorCheck.h
  docs/clang-tidy/checks/list.rst
  docs/clang-tidy/checks/misc-string-constructor.rst
  test/clang-tidy/misc-string-constructor.cpp

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