[C++ Patch] PR 48630 (PR 31423)

[Paolo Carlini <paolo dot carlini at oracle dot com>]

Hi,

in these two twin PRs filed by Ian and Gerald, it is pointed out that 
cases like:

   struct C {
     int f() { return 1; }
   };

   int f(C&c) {
     return ( 1 == c.f );
   }

where the user actually forgot the open-closed round braces are much 
more likely than cases where an ampersand is missing, still we output

invalid use of member (did you forget the ‘&’ ?)

Thus, the idea of saying instead

invalid use of member (did you forget the ‘()’ ?)

which I implemented in the patchlet below. Alternately we could give 
both hints, or refer to the argument list.

Tested x86_64-linux.

Thanks,
Paolo.

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Attachment: CL_48630
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Attachment: patch_48630
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