[Bug fortran/46641] Specification-expr checks and results with C_SIZEOF and SIZEOF

[kargl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46641

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |kargl at gcc dot gnu.org

--- Comment #2 from kargl at gcc dot gnu.org 2010-11-24 17:53:29 UTC ---
>From F2008, 13.1:

   Intrinsic procedures are divided into seven classes: inquiry
   functions, ...

Then one finds:

   15.2.3.7  C SIZEOF (X)

   Description. Size of X in bytes.

   Class. Inquiry function.

Then from 7.1.11:

   A specification inquiry is a reference to
   ...
     (4) the function C_SIZEOF from the intrinsic module ISO_C_BINDING
        (15.2.3.7), or

Then in "7.1.12 Constant Expression"

     (4) a specification inquiry where each designator or function
         argument is
         (a)   a constant expression or

So, c_sizeof() should be accepted by gfortran with -std=f2008 or gnu,
need to check f2003 whether -std=f2003 should accept it, and reject
for -std=f95.