[Bug libstdc++/127220] <format>: clang rejects every dynamic width or precision ("{:{}}") in C++26 mode: __check_dynamic_spec is instantiated before its definition

[stevensudit at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127220

--- Comment #2 from Steve Sudit <stevensudit at gmail dot com> ---
Created attachment 65512
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65512&action=edit
patch against trunk: check_dynamic_spec_integral/_string without the undefined
template