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Re: [PATCH 2/2] PR debug/63240 Add DWARF representation for C++11 defaulted member function.

On 10/03/2014 10:35 AM, Mark Wielaard wrote:
Say you have a user defined copy constructor. The DWARF consumer will
see the declaration and can assume the class won't have a default
constructor (unless that one is explicitly declared too). But currently
the DWARF consumer cannot know whether that move constructor was really
a user defined. If it was declared with = default; then it will see the
move constructor and erroneously conclude that it was user defined and
so the class won't have a default constructor generated for it.

That's not erroneous, a declaration with =default still suppresses the default constructor. "If there is no user-declared constructor for class X, a constructor having no parameters is implicitly declared as defaulted."

"user-declared" includes declarations that are defaulted in the class body. "user-provided" is the category that does not include such declarations.


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