Parser errors in #include files and unnamed programs

[hansec]

Parsing fails with visibility statements and other definitions in unnamed programs or #include files when no enclosing scope is present but is required for valid Fortran, example below.

USE test_mod ! Throws error (needs enclosing scope)
type t_test ! Throws error on following visibility statement (needs enclosing scope)
  integer i
end type t_test

INTERFACE ! Does not throw error but needs enclosing scope
 SUBROUTINE test_sub()
 END SUBROUTINE test_sub
END INTERFACE

public :: t_test ! Throws error when matching to definition