[patch,fortran] Accept noninteger exponents in initialization expressions for Fortran 2003 (PR29962)

[Tobias Burnus]

:ADDPATCH fortran:

Fortran 2003 allows much more in initialization expressions than Fortran
95 (cf. PR29962), some of which are support in STD_GNU.

This patch allows noninteger exponents in initialization expressions.
The relevant parts of the standard are:

"7.1.7 Initialization expression" in Fortran 2003 and in the Section
"7.1.6.1 Constant expression" in Fortran 95.

F95: "An initialization expression is a constant expression in which the
exponentiation operation is
permitted only with an integer power"

In F2003 this clause is gone.

Regression tested on x86_64-unknown-linux-gnu.

Tobias

2006-11-27  Tobias Burnus  <burnus@net-b.de>

    PR fortran/29962
    * expr.c (check_intrinsic_op): Allow noninteger exponents for F2003.
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