[C++ Patch] PR 57543

[Jason Merrill]

On 05/28/2014 11:38 AM, Paolo Carlini wrote:
> But unconditionally doesn't work, without doing something more. For
> example for the first test, as reported: when current_class_type is set
> and equal to "struct X<int>", class_of_this_parm is "struct X<
> <template-parameter-1-1> >".

Right, it needs to be the substituted this parameter.

Let's remember when we had a trailing return type (probably by setting a 
flag in splice_late_return_type and then preserving it when we rebuild 
METHOD/FUNCTION_TYPEs) and if it's set, tsubst the return type after the 
argument types rather than before so that SFINAE consistently works in 
lexical order.

Jason