[Patch, fortran] PR27122 - requirements for defined operators -redux

[Paul Thomas]

Tobi has very kindly, given his present commitments, taken a look at 
this patch and has given me plenty of feedback, off-list.

Most significantly, he questioned the principle of a separate test for 
defined operators, given the working mechanism for handling intrinsic 
operators.  I was greatly surprised by this too but it turns out that 
this is required, if only because these different kinds of operator hang 
onto different fields of gfc_namespace (uop_root and operators[], 
respectively).  I stand by my statement that defined operators are not 
checked in gfortran, at present.

Beyond the basic principle, Tobi alighted upon typos and stylistic 
"inexactitudes" that require me to resubmit.  To this end, please find 
attached the revised patch and testcase.  The ChangeLog entries remain 
the same.

Regtested on FC5/Athlon.

If I do not hear anything in the next 24 hours, I will submit to trunk.  
There will then follow a two week hiatus before I can submit to 4.1.

Thanks, Tobi!

Paul

2006-04-20 Paul Thomas <pault@gcc.gnu.org>

	PR fortran/27122
	* resolve.c (resolve_function): Remove general restriction on auto
	character length function interfaces.
	(gfc_resolve_uops): Check restrictions on defined operator
	procedures.
	(resolve_types): Call the check for defined operators.

2006-04-20 Paul Thomas <pault@gcc.gnu.org>

	PR fortran/27122
	* gfortran.dg/defined_operators_1.f90: New test.
	* gfortran.dg/assumed_charlen_function_1.f90: Add new error and
	remove old ones associated, incorrectly with Note 5.46.


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