[cfe-commits] [PATCH][MS][Review request] - Late Microsoft template parsing

[Francois Pichet]

Hi,

This patch implements "Late template parsing" in Microsoft mode.
It solves the problem of Microsoft allowing names not yet declared in
template code

Like this:

template <class T>
void foo() {
    undeclared();
}

void undeclared(){
}

To do so, template function code and template explicit instantiations
are lexed, the tokens saved and actually parsed at the end of the
translation unit.
This resolve a bunch of error when parsing Microsoft C++ template code
with clang.

Important point: I tested that this patch can self host clang (on
Darwin) with -fms-extension enabled and it works:
  make CXXFLAGS=-fms-extensions
  cd tools/clang
  make test
  100% pass
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