[patch, fortran] PR34325 Wrong error message for syntax error

[Jerry DeLisle]

This patch provides some additional checks for balanced parenthesis in a couple 
of strategic locations.  This will not catch all the possibilities, but is a 
reasonable enhancement.

I noticed in some cases of double parens for array references such as:

	r3((2,2)) = 4.3

gfortran correctly finds the error stating that the index must be integer.  It 
was not real clear that in the above (2,2) is a COMPLEX.  Ifort and Sun F95 both 
add additional info that a COMPLEX was found.  I supplemented the gfortran error 
to do similarly.

Regression tested on x86-64.  Revised test case included in patch.

OK for trunk?

Regards,

Jerry

2008-05-04  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/34325
	* decl.c (match_attr_spec): Check for matching pairs of parenthesis.
	* expr.c (gfc_specification_expr): Supplement the error message with the
	type that was found.
	* resolve.c (gfc_resolve_index): Likewise.
	* match.c (gfc_match_parens): Clarify error message with "at or before".
	(gfc_match_do): Check for matching pairs of parenthesis.


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