Implement the Microsoft __is_convertible_to type trait, modeling the
semantics after the C++0x is_convertible type trait. This
implementation is not 100% complete, because it allows access errors
to be hard errors (rather than just evaluating false).

Original patch by Steven Watanabe!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124425 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed