stevieb has asked for the wisdom of the Perl Monks concerning the following question:

I'm updating one of my modules which will facilitate automating the injection of code into Perl (and Python) files (primarily inside of subs).

My question is whether there's a way to perl -c an array of perl code as a whole without executing it within a running program, where each element in the array is a line of code?

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Re: "perl -c" an array of code in a running program
by BrowserUk (Patriarch) on Jul 21, 2015 at 23:25 UTC

    You could try wrapping the array code into a subroutine and evaling it to detect errors:

    
my @code = ...;

my $sub = join "\n", 'use strict;', 'use warnings;', 'sub test {', @co
+de, '} 1;';

if( eval $sub != 1 ) {
    ## look in $@ for errors;
}

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Re: "perl -c" an array of code in a running program
by Eily (Monsignor) on Jul 21, 2015 at 23:13 UTC

    You could try to actually run perl -c on your code: my @results = map { system "echo '$_' | perl -c " } @code;. You have to escape your strings correctly though.

    Or an eval may do the trick as well: my @results = map { eval "sub { $_ }"; $@ } @code; where adding a sub block prevents the code from actually being run.

    In both those exemple you might still have code that is run, in a BEGIN block for example.

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