Fortran: Fix problem with substring selectors in ASSOCIATE [PR115700]

Fortran: Fix problem with substring selectors in ASSOCIATE [PR115700]

2024-10-31  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/115700
	* resolve.cc (resolve_variable): The typespec of an expression,
	which is not a substring, can be shared with a deferred length
	associate name.
	(resolve_assoc_var): Extract a substring reference with non-
	constant start or end. Use it to flag up the need for array
	associate name to be a pointer.
	(resolve_block_construct): Change comment from past to future
	tense.

gcc/testsuite/
	PR fortran/115700
	* gfortran.dg/associate_70.f90: New test.

(cherry picked from commit 159fb203231c503418e7ab9f45282957e40cb195)