Fortran: Invalid association with operator-result selector [PR123352]

Fortran:  Invalid association with operator-result selector [PR123352]

2026-01-03  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/123352
	* gfortran.h: Add prototype for gfc_resolve_symbol.
	* interface.cc (matching_typebound_op): If the current
	namespace has not been resolved and the derived type is use
	associated, resolve the derived type with gfc_resolve_symbol.
	* match.cc (match_association_list): If the associate name is
	unknown type and the selector is an operator expression, copy
	the selector and call gfc_extend_expr. Replace the selector if
	there is a match, otherwise free the copy.
	* resolve.cc (gfc_resolve_symbol): New function.

gcc/testsuite/
	PR fortran/123352
	* gfortran.dg/associate_78.f90: New test.