Add modernize-use-default check to clang-tidy.

Summary:
Add a check that replaces empty bodies of special member functions with '= default;'.
For now, it is only implemented for the default constructor and the destructor, which are the easier cases.
The copy-constructor and the copy-assignment operator cases will be implemented later.

I applied this check to the llvm code base and found 627 warnings (385 in llvm, 9 in compiler-rt, 220 in clang and 13 in clang-tools-extra).
Applying the fixes didn't break any build or test, it only caused a -Wpedantic warning in lib/Target/Mips/MipsOptionRecord.h:33 becaused it replaced
virtual ~MipsOptionRecord(){}; to virtual ~MipsOptionRecord()= default;;

Reviewers: klimek

Subscribers: george.burgess.iv, Eugene.Zelenko, alexfh, cfe-commits

Differential Revision: http://reviews.llvm.org/D13871

llvm-svn: 250897

0 files changed, 0 insertions, 0 deletions