#!/usr/bin/perl -w
use strict;

my %blockname = (
    e => '%s;',
    B => '; BEGIN { %s };',
    E => '; END { %s };',
);

my @arg;

while (@ARGV && (my ($switch, $rest) = $ARGV[0] =~ /^-(.)(.*)/)) {
    if ($rest eq '-') { # early exit if --
        push @arg, @ARGV;
        last;
    }
    
    if ($switch !~ /[BEe]/) {
        push @arg, shift @ARGV;
        next;
    }
    
    shift (@ARGV);
    if (not length $rest) {
        if(@ARGV) {
            $rest = shift (@ARGV);
        }
        else {
            $! = 2; # emulate perl(1)
            die "No code specified for -$switch.";
        }
    }

    push @arg, -e => sprintf $blockname{$switch}, $rest;
}

exec { $^X } $^X, @arg;

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In reply to New switches for perl(1) by Aristotle

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