641ede93ef
This patch plugs many holes in static initializer semantics, improves error messages for default initial values and other component properties in parameterized derived type instantiations, and cleans up several small issues noticed during development. We now do proper scalar expansion, folding, and type, rank, and shape conformance checking for component default initializers in derived types and PDT instantiations. The initial values of named constants are now guaranteed to have been folded when installed in the symbol table, and are no longer folded or scalar-expanded at each use in expression folding. Semantics documentation was extended with information about the various kinds of initializations in Fortran and when each of them are processed in the compiler. Some necessary concomitant changes have bulked this patch out a bit: * contextual messages attachments, which are now produced for parameterized derived type instantiations so that the user can figure out which instance caused a problem with a component, have been added as part of ContextualMessages, and their implementation was debugged * several APIs in evaluate::characteristics was changed so that a FoldingContext is passed as an argument rather than just its intrinsic procedure table; this affected client call sites in many files * new tools in Evaluate/check-expression.cpp to determine when an Expr actually is a single constant value and to validate a non-pointer variable initializer or object component default value * shape conformance checking has additional arguments that control whether scalar expansion is allowed * several now-unused functions and data members noticed and removed * several crashes and bogus errors exposed by testing this new code were fixed * a -fdebug-stack-trace option to enable LLVM's stack tracing on a crash, which might be useful in the future TL;DR: Initialization processing does more and takes place at the right times for all of the various kinds of things that can be initialized. Differential Review: https://reviews.llvm.org/D92783
59 lines
1.8 KiB
Fortran
59 lines
1.8 KiB
Fortran
! RUN: %S/test_errors.sh %s %t %f18
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subroutine s1(x, y)
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!ERROR: Array pointer 'x' must have deferred shape or assumed rank
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real, pointer :: x(1:) ! C832
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!ERROR: Allocatable array 'y' must have deferred shape or assumed rank
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real, dimension(1:,1:), allocatable :: y ! C832
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end
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subroutine s2(a, b, c)
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real :: a(:,1:)
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real :: b(10,*)
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real :: c(..)
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!ERROR: Array pointer 'd' must have deferred shape or assumed rank
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real, pointer :: d(:,1:) ! C832
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!ERROR: Allocatable array 'e' must have deferred shape or assumed rank
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real, allocatable :: e(10,*) ! C832
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!ERROR: Assumed-rank array 'f' must be a dummy argument
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real, pointer :: f(..) ! C837
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!ERROR: Assumed-shape array 'g' must be a dummy argument
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real :: g(:,1:)
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!ERROR: Assumed-size array 'h' must be a dummy argument
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real :: h(10,*) ! C833
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!ERROR: Assumed-rank array 'i' must be a dummy argument
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real :: i(..) ! C837
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end
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subroutine s3(a, b)
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real :: a(*)
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!ERROR: Dummy array argument 'b' may not have implied shape
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real :: b(*,*) ! C836
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!ERROR: Implied-shape array 'c' must be a named constant
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real :: c(*) ! C836
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!ERROR: Named constant 'd' array must have constant or implied shape
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integer, parameter :: d(:) = [1, 2, 3]
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end
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subroutine s4()
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type :: t
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integer, allocatable :: a(:)
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!ERROR: Component array 'b' without ALLOCATABLE or POINTER attribute must have explicit shape
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integer :: b(:) ! C749
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real, dimension(1:10) :: c
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!ERROR: Array pointer component 'd' must have deferred shape
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real, pointer, dimension(1:10) :: d ! C745
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end type
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end
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function f()
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!ERROR: Array 'f' without ALLOCATABLE or POINTER attribute must have explicit shape
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real, dimension(:) :: f ! C832
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end
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subroutine s5()
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!ERROR: Allocatable array 'a' must have deferred shape or assumed rank
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integer :: a(10), b(:)
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allocatable :: a
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allocatable :: b
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end subroutine
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