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From: stef@zweig.sun (Stephane Payrard)
Newsgroups: comp.lang.perl
Subject: I  ${$a}
Message-ID: <STEF.90Oct11015128@zweig.sun>
Date: 11 Oct 90 08:51:28 GMT
Sender: news@sun.Eng.Sun.COM
Organization: Sun Microsystems -- Mountain View
Lines: 31


I would expect a expression like ${$a} to evaluate from
inside out:
It is not the case as demonstrated by the following
test.


% perl -e '$b=2;$a="b";print ${$a};'
 
I would expect ${$a} to evaluate to 1 the following way:

  ${$a} -> ${"b"} -> $b -> 1


What is the canonic way to write an expression which
behaves like I exprected (I guess it imply to use `eval').

This lead to RFE:
   supporting this kind of multilevel evalation of string:
         -If an expression contains the construct  ${expression},
          this construct is evaluated and replaced by its value 
          before the string contained it is evaluated.


        stef
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Stephane Payrard -- stef@eng.sun.com -- (415) 336 3726
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