#!/usr/bin/perl --
use strict; use warnings;
my $blah  = q{-0.137 + (0.00479 / (W/0.9)) + (2.5593 * (W/0.9 ) ,0.045,0 };
print EvalPolynominal( $blah, 1,1 );
sub EvalPolynominal {
	#first parameter gives the polynominal string
	#second parameter gives the min-des width
	#third parameter gives the short-line length
	
	my $polynominal = shift;
	my $curWidth    = shift;
	my $curLength   = shift;
	
	$polynominal =~ s/W/$curWidth/g ;#replace W with current value of min width
	$polynominal =~ s/L/$curLength/g ;#replace L with current value of min Length
    local $@;
	my $ret = eval $polynominal;
    warn "Trying:\n\t$polynominal\nbut got: $@\n" if $@;
    return $ret;
}
__END__

$ perl -we "  -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045,0 "
syntax error at -e line 1, at EOF
Execution of -e aborted due to compilation errors.

$ perl blah
Trying:
        -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045,0
but got: syntax error at (eval 1) line 2, at EOF

Use of uninitialized value in print at blah line 4.

$ perl -we "  -0.137 + (0.00479 / (1/0.9)) + (2.5593 * (1/0.9 ) ,0.045,0 "
syntax error at -e line 1, at EOF
Execution of -e aborted due to compilation errors.