Your assert function won't be able to see lexical variables.

my $x = 42;
assert '$x > 40';   # assertion fails,
                    # because eval can't see $x

[download]

Better is to write assert so that it takes a code ref...

sub assert (&) {
   require Carp;
   (shift)->() ? 1 : Carp::croak('Assertion failed')
}

my $x = 42;
assert { $x > 40 };   # assertion ok

[download]

Also, I'd recommend giving your pseudo-constants TRUE, FALSE and EXIT_SUCCESS an empty prototype - i.e. () - and not using the return keyword in them. This allows the Perl compiler to treat them as real constants - inlining them into code that calls them. And if will solve your problems that lead them to occasionally needing to be called with a leading &.

sub TRUE         () { 1 }
sub FALSE        () { 0 }
sub EXIT_SUCCESS () { TRUE }

[download]
use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name

In reply to Re: C and other stuff by tobyink
in thread C and other stuff by perlaintdead

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