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# -*- coding: utf-8 -*- |
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# Copyright (C) 2011 Rocky Bernstein <rocky@cpan.org> |
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# NOTE: this does syntax checking and has problems on MS Windows. |
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# More specific context checking can be had in DB::Eval::eval_not_ok() |
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# and that is gnereally (I think) we will be using. |
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57009
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use strict; use warnings; |
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package Devel::Trepan::Condition; |
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use English qw( -no_match_vars ); |
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5780
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use vars qw(@EXPORT @ISA); |
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5144
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@EXPORT = qw( is_valid_condition ); |
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@ISA = qw(Exporter); |
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sub is_valid_condition($) { |
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0
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my ($expr) = @_; |
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return 1 if ($OSNAME eq 'MSWin32'); |
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13837
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my $pid = fork(); |
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if ($pid) { |
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waitpid($pid, 0); |
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return $CHILD_ERROR == 0; |
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} else { |
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close STDERR; |
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if ($OSNAME eq 'MSWin32') { |
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system ($EXECUTABLE_NAME, '-c', '-e', $expr); |
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exit $?; |
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} else { |
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exec($EXECUTABLE_NAME, '-c', '-e', $expr); |
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} |
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} |
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} |
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# Demo code |
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unless (caller) { |
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for my $expr ('$a=2', '1+', "join(', ', \@ARGV)", 'join(", ", @ARGV)') { |
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my $ok = is_valid_condition($expr); |
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printf("$expr is %sa valid_condition\n", $ok ? '' : 'not '); |
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} |
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} |
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1; |