Re: [C++ Patch] Small bunch of SFINAE related fixes

OK. Jason

[C++ Patch] Small bunch of SFINAE related fixes

Hi, while working on the last patch I noticed that we have got quite a few unconditional error calls in functions taking a tusbst_flags_t parameter. The below mostly adjusts those. I'm also finding a bit misleading the name warn_ref_binding for a the function emitting a permerror, thus I'm c