Patch: allow use of $x and @x

[Pierre Peiffer]

Ok, here is a patch including everything (hopefully) about the use of $# and @# 
to access the number of argument..

I've merged the two patches into one.

I have updated and added some tests in the testsuite to test these new 
identifiers. And I also have (tried to) updated the man.
Also there is some minor changes/updates to improve my previous code.

Here is a detailled changelog:

	* parse.cxx, parse.h: Add $# and @# identifiers to access the number
	of arguments.
	- Allow the use of $x and @x identifiers during the preprocessing.
	- Produce more accurate error message when having incomplete
	conditional during the preprocessing.
	* stap.1.in: Document $# and @# identifiers.

And in the testsuite:
	* parseok/fourteen.stp: Add test about $# and @# usage during
	the preprocessing.
	* parseko/preprocess10.stp: New test.
	* parseko/preprocess11.stp: New test.
	* parseko/preprocess12.stp: New test.

Thanks,

Pierre Peiffer a écrit :
> Frank Ch. Eigler a écrit :
> 
>>
>> The ideas and patches look fine.  They would need to be completed by
>> the addition of some documentation to the man pages, and some bits for
>> the testsuite.  Would you like to do that too?
>>
> Yep, I'll try to do that today.
> 

-- 
Pierre
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