Make ParmVarDecl::getDefaultArg() more robust, it now asserts that the argument is not unparsed. Add a new hasDefaultArg() and use it in places where getDefaultArg() was called when the argument was unparsed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72984 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed