Re: Metalanguages in environments where code is data.

Article View: comp.lang.misc

Article #7027

#7027

From: Tom Christiansen
Date: Fri, 11 Nov 1994 18:51

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:-> In comp.lang.perl, peter@nmti.com (Peter da Silva) writes:
:Um, OK, except my example used a quoted brace-bracketed string with variable
:interpolation deferred until a later point. Can you do deferred variable
:interpolation in Perl?

Sure; just use q{no interp on $var for now}, and then interpolate it later,
probably with things like

    $string = q{no interp on $var for now};
    .....
    $newstring = eval qq{"$string"};

or if you know they're just simple variables, merely

    $string =~ s/([\$\@]\w+)/$1/eeg;	# check your electroencephalograph 

--tom
-- 
Tom Christiansen      Perl Consultant, Gamer, Hiker      tchrist@mox.perl.com
There are many times when you want it to ignore the rest of the string just
like atof() does.  Oddly enough, Perl calls atof().  How convenient.  :-)
        --Larry Wall in <1991Jun24.231628.14446@jpl-devvax.jpl.nasa.gov>

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From: Tom Christiansen <tchrist@mox.perl.com>
Newsgroups: comp.lang.misc,gnu.misc.discuss,comp.lang.scheme,comp.lang.tcl,comp.lang.perl
Subject: Re: Metalanguages in environments where code is data.
Date: 11 Nov 1994 18:51:53 GMT
Organization: Perl Consulting and Training
Lines: 22
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