[cfe-commits] [patch] [Windows] __leave keyword parsing and AST nodes

[João Matos]

Hi, attached patch adds support for the "__leave" keyword used in "__try"
exception handling support on Windows/MSVC.

http://msdn.microsoft.com/en-us/library/9xtt5hxz(v=vs.110).aspx

Clang already had __leave as a keyword in TokenKinds but it was not being
consumed by the parser yet. I wired this up and also added a new Stmt AST
node for it.

-- 
João Matos
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