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9.155 IS_CONTIGUOUS — Test whether an array is contiguous ¶

Description:

IS_CONTIGUOUS tests whether an array is contiguous.

Standard:

Fortran 2008 and later

Class:

Inquiry function

Syntax:

RESULT = IS_CONTIGUOUS(ARRAY)

Arguments:

ARRAY

Shall be an array of any type.

Return value:

Returns a LOGICAL of the default kind, which .TRUE. if ARRAY is contiguous and false otherwise.

Example:

program test
  integer :: a(10)
  a = [1,2,3,4,5,6,7,8,9,10]
  call sub (a)      ! every element, is contiguous
  call sub (a(::2)) ! every other element, is noncontiguous
contains
  subroutine sub (x)
    integer :: x(:)
    if (is_contiguous (x)) then
      write (*,*) 'X is contiguous'
    else
      write (*,*) 'X is not contiguous'
    end if
  end subroutine sub
end program test