From:	John Peacock	Date:	Fri Jun  9 07:51:51 2006
Subject:	Re: %SVf in perl

mohammad yaseen wrote:
>   Can someone tell how SVf format sprecifer prints a string when it is %_?

The "%_" format is a special Perl extension to printf-style formats that knows
how to handle extracting the string from an SV (hence SVf - SV format).  This
includes (if I'm not mistaken) calling mg_get() on any magic objects to get the SV.

>   What does "%""_" signifies? Is any special mening for this in perl?How this works?

In C-code, two strings with whitespace separating them (you just can't see that
particular whitespace) just get concatenated together.  Hence the following are
equivalent:

	"%_"
	"%""_"
	"%"    "_"

and in fact a newline can be inserted between the two strings and it still won't
have any bearing on what the compiler actually perceives (C is whitespace blind).

What problem are you trying to solve???

John

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John Peacock
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