[Bug c++/64959] SFINAE in UDLs

[andrea.azzarone at canonical dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64959

Andrea Azzarone <andrea.azzarone at canonical dot com> changed:

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--- Comment #1 from Andrea Azzarone <andrea.azzarone at canonical dot com> ---
Created attachment 34706
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34706&action=edit
Proposed fix to allow the use of enable_if for UDLs.