The -fugly-assumed option enables the treatment of any array with a final dimension specified as `1' as an assumed-size array, as if `*' had been specified instead.
For example, `DIMENSION X(1)' is treated as if it
had read `DIMENSION X(*)' if `X' is listed as
a dummy argument in a preceding
ENTRY statement in the same program unit.
Use an explicit lower bound to avoid this interpretation. For example, `DIMENSION X(1:1)' is never treated as if it had read `DIMENSION X(*)' or `DIMENSION X(1:*)'. Nor is `DIMENSION X(2-1)' affected by this option, since that kind of expression is unlikely to have been intended to designate an assumed-size array.
This option is used to prevent warnings being issued about apparent out-of-bounds reference such as `X(2) = 99'.
It also prevents the array from being used in contexts that disallow assumed-size arrays, such as `PRINT *,X'. In such cases, a diagnostic is generated and the source file is not compiled.
The construct affected by this option is used only in old code that pre-exists the widespread acceptance of adjustable and assumed-size arrays in the Fortran community.
Note: This option does not affect how `DIMENSION X(1)' is
treated if `X' is listed as a dummy argument only
DIMENSION statement (presumably in
For example, -fugly-assumed has no effect on the
following program unit:
SUBROUTINE X REAL A(1) RETURN ENTRY Y(A) PRINT *, A END