Re: zsh-4.2.1: LINENO lost in evals

["Dieter Lambrecht" <dieter.lambrecht@db.com>]

Hi,

the behaviour of LINENO-behavior may be similiar to perl in some curcumstances. Script

#! /bin/ksh

print $LINENO
eval 'print $LINENO'

used with a real ksh on AIX or Solaris always prints the correct LINENO. The behaviour of zsh is incompatible to ksh, even though in "emulate ksh"-mode.

Kind Regards,

Dieter Lambrecht




                                                                                                                                                                
                      Bart Schaefer                                                                                                                             
                      <schaefer@brassla        To:       zsh-workers@sunsite.dk                                                                                 
                      ntern.com>               cc:       Dieter Lambrecht/DMG/Zentrale/DeuBa@Zentrale                                                           
                                               Subject:  Re: zsh-4.2.1: LINENO lost in evals                                                                    
                      09/01/2004 05:10                                                                                                                          
                      PM                                                                                                                                        
                      Please respond to                                                                                                                         
                      zsh-workers                                                                                                                               
                                                                                                                                                                
                                                                                                                                                                




On Wed, 1 Sep 2004, Peter Stephenson wrote:

> "Dieter Lambrecht" wrote:
> >#! /bin/zsh -x
>
> (There must be a set -x or setopt xtrace lurking somewhere.)

Welcome back, Peter. :-)

> It's not actually lost, it's showing you the line in the eval.  That's
> a feature (compare error messages from Perl evals, which is where we
> pinched the output format from).

The thing is, Perl has two kinds of "eval":

schaefer[676] perl <<\EOF
print __LINE__."\n";
eval 'print __LINE__."\n"';
eval { print __LINE__."\n"; };
EOF
1
1
3

The kind in braces, which gets precompiled, behaves differently than the
 kind in quotes.  Zsh only has the kind in quotes.




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