tree 24263da428c02f4ba6efe5a6ff2ac4aa526a9f67
parent e452c78072156c14cd9998733e3b4b28b6fc7fd7
author Chandler Carruth <chandlerc@gmail.com> 1304447710 +0000
committer Chandler Carruth <chandlerc@gmail.com> 1304447710 +0000

When parsing a template friend declaration we dropped the template
parameters on the floor in certain cases:
class X {
  template <typename T> friend typename A<T>::Foo;
};

This was parsed as a *non* template friend declaration some how, and
received an ExtWarn. Fixing the parser to actually provide the template
parameters to the freestanding declaration parse triggers the code which
specifically looks for such constructs and hard errors on them.

Along the way, this prevents us from trying to instantiate constructs
like the above inside of a outer template. This is important as loosing
the template parameters means we don't have a well formed declaration
and template instantiation will be unable to rebuild the AST. That fixes
a crash in the GCC test suite.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130772 91177308-0d34-0410-b5e6-96231b3b80d8