Coarray derived type of allocatable vector of allocatable character components

Coarray derived type of allocatable vector of allocatable character components

Consider the following code that attempts to create a coarray derived type containing an array of variable-length allocatable character types.

program testCoarrayJaggedArray
implicit none

integer :: i
type                                :: CharVec_type
    character(:), allocatable       :: record
end type

type                                :: List_type
    type(CharVec_type), allocatable :: Item(:)
end type

type(List_type)                     :: List[*]

if (this_image()==1) then
    allocate( List%Item(num_images()) )
    do i = 1, num_images()
        allocate( character(63) :: List%Item(i)%record )
        write(List%Item(i)%record,*) i
        List%Item(i)%record = "King" // trim(adjustl(List%Item(i)%record))
    end do
    sync images(*)
    sync images(1)
    allocate( List%Item( size(List[1]%Item(:)) ) )
    do i = 1, size(List%Item(:))
        allocate( character( len(List[1]%Item(i)%record) ) :: List%Item(i)%record )
        List%Item(i)%record = List[1]%Item(i)%record
        write(*,*) this_image(), List%Item(i)%record
    end do
end if

end program testCoarrayJaggedArray


Intel's ifort 2018 in debug mode, shared-memory coarray, complains about several aspects of this code. Here is the first one:

ifort /debug /Qcoarray=shared /standard-semantics /traceback /gen-interfaces /check /fpe:0 main.f90 -o run.exe
Intel(R) Visual Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version Build 20180210
Copyright (C) 1985-2018 Intel Corporation.  All rights reserved.

main.f90(30): error #6457: This derived type name has not been declared.   [CHARACTER]
        allocate( character( len(List[1]%Item(i)%record) ) :: List%Item(i)%record )
main.f90(30): error #8235: If type specification appears, the type and kind type parameters of each object being allocated must be the same as type and kind type parameters of the type specification.   [RECORD]
        allocate( character( len(List[1]%Item(i)%record) ) :: List%Item(i)%record )
compilation aborted for main.f90 (code 1)


Is this code non-standard Fortran? In particular the line that allocates a character type using the length of the corresponding character on the first image:

allocate( character( len(List[1]%Item(i)%record) ) :: List%Item(i)%record )


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Best Reply

The syntax appears to be confusing the compiler. I suggest you lodge a ticket.

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