[patch] Fix PR c++/16829: Diagnose missing default parameters

[Mark Mitchell]

Volker Reichelt wrote:
> When a function parameter has a default value, all subsequent
> parameters must have one, too. Unfortunately, we failed to diagnose
> violations of this rule in several circumstances (mostly in templates).

Ouch; thanks for fixing this.

> 	PR c++/16829
> 	* decl.c (start_preparsed_function): Check default arguments
> 	unconditionally.
> 	* name-lookup.c (pushdecl_maybe_friend): Check default arguments
> 	of all functions and function templates.
> 	* parser.c (cp_parser_late_parsing_default_args): Check default
> 	arguments.
> 	* decl2.c (check_default_args): Set missing default arguments to
> 	error_mark_node.

OK, thanks.

:REVIEWMAIL:

-- 
Mark Mitchell
CodeSourcery
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