[LLVMbugs] [Bug 19564] error: addition of default argument on redeclaration makes this constructor a default constructor

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19564

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |INVALID

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
(In reply to comment #0)
> The latest gcc-4.9 release compiles without error.  However, ToT clang
> produces an error.

We're not in the habit of making up language rules =) See C++14 8.3.6/6 (and
DR1344):

"Except for member functions of class templates, the default arguments in a
member function definition that appears outside of the class definition are
added to the set of default arguments provided by the member function
declaration in the class definition; the program is ill-formed if a default
constructor (12.1), copy or move constructor, or copy or move assignment
operator (12.8) is so declared."

Maybe file a bug with gcc?

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