[Bug c++/93870] [8/9/10 Regression] User-defined conversion function not working in evaluation of template argument

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93870

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Actually perhaps we should create an IMPLICIT_CONV_EXPR for *any*
value-dependent argument.