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From: jbw@bucsf.bu.edu (Joe Wells)
Newsgroups: comp.lang.perl
Subject: subroutine inspecting its calling environment
Message-ID: <JBW.90Mar5185907@bucsf.bu.edu>
Date: 5 Mar 90 23:59:07 GMT
Sender: news@bu.edu.bu.edu
Organization: Boston University Computer Science Department
Lines: 19

Some questions for the great perl gods:

1.  Can a subroutine tell whether it was invoked without arguments?

    example:  &subroutine_name;

2.  Can a subroutine tell whether it was invoked in an array or scalar
context?  A boolean scalar context?

3.  Can a subroutine tell whether its invocation was part of an expression
or was the entire expression?

    example:  &sub($x);
	      $x = (&sub ($x) + &sub2 ($y));

-- 
Joe Wells <jbw@bu.edu>
jbw%bucsf.bu.edu@cs.bu.edu
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