Beware of that BEGIN, END, CHECK, INIT, AUTOLOAD, and DESTROY can have a sub keyword in front of them. They can also be prototyped. AUTOLOAD and DESTROY are not relevant for this post though.

However, CHECK and INIT are relevant! Try this one-liner:   perl -wle'BEGIN { require "browserUk.pl" }' where browserUk.pl is your program above, but with __END__ changed to __DATA__ (why did you use __END__ over __DATA__ anyway?), some code in DATA changed, and with a true return value: 

use strict;

while(<DATA>) {
    chomp;
    my $code = $_;
    tr/\n//d;
    s[((?:BEGIN|END)\s*{)][sub syntax_check_$1]g;
    eval 'return;' . $_;
    print "'$code' \n\t: ", $@ ? "Fails with\n$@" : 'Passes syntax che
+ck';
}

1;

__DATA__
INIT      { print '*** GOTCHA!!! ***'; } # Executes.
CHECK     { print '*** GOTCHA!!! ***'; } # Executes.
sub BEGIN { print '*** GOTCHA!!! ***'; } # Fails to compile.
END ()    { print '*** GOTCHA!!! ***'; } # Executes.
my $a = 1;
my $a = cool;
my $

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Another issue would be to take care of use() statements as they're compile-time statements. But if you get rid of use statements, then you might also create compilation errors, since the use() statement might import prototyped subroutines. For instance, perhaps a &cool subroutine prototyped with () was imported in the code above.

And I wouldn't be surprised if there are more related issues...

ihb

In reply to Re: Re: run-time syntax checking by ihb
in thread run-time syntax checking by Pardus

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