[llvm-bugs] [Bug 27676] Modules reject 'valid' C++

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27676

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #2 from Richard Smith <richard-llvm at metafoo.co.uk> ---
This is the documented and intended behavior of macros in modular builds. See

  http://clang.llvm.org/docs/Modules.html#macros

A #undef in a modular header only undefines the macros that are visible to that
module.

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