[Bug fortran/78798] New: [cleanup] some int-valued functions should be bool

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78798

            Bug ID: 78798
           Summary: [cleanup] some int-valued functions should be bool
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: janus at gcc dot gnu.org
  Target Milestone: ---

This is a follow-up to PR 78392, where r243580 added a FIXME in expr.c saying
that gfc_is_constant_expr should return a bool instead of an int.

Other cases where the same comment applies:
* gfc_is_formal_arg
* gfc_is_compile_time_shape