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Re: [C++0x] Range-based for statements and ADL
On Tue, Mar 29, 2011 at 8:22 PM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> How about "No suitable %<begin%> and %<end%> functions found for range
> expression of type %qT in %<for%> statement" ?
Nice.
But the problem here is that there are a lot of different error conditions:
1. begin member but not end member.
2. end member but not begin member.
3. begin and end member but one or both are not callable/accesible/whatever.
3. no begin/end members, a begin global function but not end.
4. no begin/end members, an end global function but not begin.
5. no begin/end members, begin and end functions but one or both not
callable/wrong overload/etc.
6. no begin/end members, no begin/end global functions. Since the
standard headers have the std::begin/std::end templates, this will not
happen when you include (most) STL headers.
What is the best message for each? Does it make sense to have up to 6
different messages? Too many?
I just can't tell.
--
Rodrigo