llvm/flang/test/semantics/resolve21.f90
Tim Keith 9811353abf [flang] Fix problems determining object/function/subroutine
Convert each Entity to ObjectEntity at the end of each scope.
Add `ConvertToObjectEntity()` to achieve this, similar to
`ConvertToProcEntity()`. Move them both up into `ScopeHandler`
because they need to be called from `PopScope()`.

In a proc-decl, only mark the proc as a function if it has a return type.
If no return type is declared, function vs. subroutine is determined by:
- for a module it is a subroutine (at end of specification-part)
- otherwise it is by usage

If an entity that could otherwise be a function is used as the base of a
structure component, that forces it to be an object. Because we have to
change it to an object entity at that point, the `base` in `FindComponent()`
can't be const, and that propagates to all of its callers.

Remove the name argument to `ApplyImplicitRules` as it is unneeded.

Fixes flang-compiler/f18#191.

Original-commit: flang-compiler/f18@9bd8bf7c37
Reviewed-on: https://github.com/flang-compiler/f18/pull/194
Tree-same-pre-rewrite: false
2018-09-22 08:05:46 -07:00

57 lines
1.5 KiB
Fortran

! Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
!
! Licensed under the Apache License, Version 2.0 (the "License");
! you may not use this file except in compliance with the License.
! You may obtain a copy of the License at
!
! http://www.apache.org/licenses/LICENSE-2.0
!
! Unless required by applicable law or agreed to in writing, software
! distributed under the License is distributed on an "AS IS" BASIS,
! WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
! See the License for the specific language governing permissions and
! limitations under the License.
subroutine s1
type :: t
integer :: i
integer :: s1
integer :: t
end type
!ERROR: 't' is already declared in this scoping unit
integer :: t
integer :: i, j
type(t) :: x
!ERROR: Derived type 't2' not found
type(t2) :: y
external :: v
type(t) :: v, w
external :: w
!ERROR: 'z' is not an object of derived type; it is implicitly typed
i = z%i
!ERROR: 's1' is an invalid base for a component reference
i = s1%i
!ERROR: 'j' is not an object of derived type
i = j%i
!ERROR: Component 'j' not found in derived type 't'
i = x%j
!ERROR: 'v' is an invalid base for a component reference
i = v%i
!ERROR: 'w' is an invalid base for a component reference
i = w%i
i = x%i !OK
end subroutine
subroutine s2
type :: t1
integer :: i
end type
type :: t2
type(t1) :: x
end type
type(t2) :: y
integer :: i
!ERROR: Component 'j' not found in derived type 't1'
k = y%x%j
k = y%x%i !OK
end subroutine