[Bug c++/51149] Smarter error output in a few template deduction/substitution failure cases

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51149

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |manu at gcc dot gnu.org

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2011-11-16 08:13:54 UTC ---
Could you provide self-contained testcases?

What do you mean by "forgetting you are working with strings"? Would it help if
the compiler reminded it to you like in:

pr51149.cc:8:36: error: invalid operands to binary expression ('string' (aka
'basic_string<char>') and 'const char [5]')
  string theString = anotherString << "text";
                     ~~~~~~~~~~~~~ ^  ~~~~~~

I think it is very hard to guess in general that you meant something if you
wrote something else. Why suggest "+" and not something else? Also, it may make
sense with "std::string", but what about every other possible or standard type?
What is the correct guess there?