#!perl

use Test::More tests => 16;

use warnings FATAL => 'all';
use strict;

sub Burlap::fun (&) { $_[0]->() }

{
	use Function::Parameters;

	is fun { 2 + 2 }->(), 4;

	package Burlap;

	::ok fun { 0 };
}

{
	package Burlap;

	::is fun { 'singing' }, 'singing';
}

{
	sub proc (&) { &Burlap::fun }

	use Function::Parameters { proc => 'function' };

	proc add($x, $y) {
		return $x + $y;
	}

	is add(@{[2, 3]}), 5;

	{
		use Function::Parameters;

		is proc () { 'bla' }->(), 'bla';
		is method () { $self }->('der'), 'der';

		{
			no Function::Parameters;

			is proc { 'unk' }, 'unk';

			is eval('fun foo($x) { $x; } 1'), undef;
			like $@, qr/syntax error/;
		}

		is proc () { 'bla' }->(), 'bla';
		is method () { $self }->('der'), 'der';

		no Function::Parameters 'proc';
		is proc { 'unk2' }, 'unk2';
		is method () { $self }->('der2'), 'der2';
	}
	is proc () { 'bla3' }->(), 'bla3';
	is eval('fun foo($x) { $x; } 1'), undef;
	like $@, qr/syntax error/;
}