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#!perl
use Test::More tests => 46;
use warnings FATAL => 'all';
use strict;
use Function::Parameters {
fun => {
default_arguments => 1,
},
nofun => {
default_arguments => 0,
},
};
fun foo0($x, $y = 1, $z = 3) { $x * 5 + $y * 2 + $z }
is foo0(10), 55;
is foo0(5, -2), 24;
is foo0(6, 10, 1), 51;
is fun ($answer = 42) { $answer }->(), 42;
fun sharingan($input, $x = [], $y = {}) {
push @$x, $input;
$y->{$#$x} = $input;
$x, $y
}
{
is_deeply [sharingan 'e'], [['e'], {0 => 'e'}];
my $sneaky = ['ants'];
is_deeply [sharingan $sneaky], [[['ants']], {0 => ['ants']}];
unshift @$sneaky, 'thanks';
is_deeply [sharingan $sneaky], [[['thanks', 'ants']], {0 => ['thanks', 'ants']}];
@$sneaky = 'thants';
is_deeply [sharingan $sneaky], [[['thants']], {0 => ['thants']}];
}
is eval('fun ($x, $y = $powersauce) {}'), undef;
like $@, qr/^Global symbol.*explicit package name/;
{
my $d = 'outer';
my $f;
{
my $d = 'herp';
fun guy($d = $d, $x = $d . '2') {
return [$d, $x];
}
is_deeply guy('a', 'b'), ['a', 'b'];
is_deeply guy('c'), ['c', 'c2'];
is_deeply guy, ['herp', 'herp2'];
$d = 'ort';
is_deeply guy('a', 'b'), ['a', 'b'];
is_deeply guy('c'), ['c', 'c2'];
is_deeply guy, ['ort', 'ort2'];
my $g = fun ($alarum = $d) { "[$alarum]" };
is $g->(""), "[]";
is $g->(), "[ort]";
$d = 'flowerpot';
is_deeply guy('bloodstain'), ['bloodstain', 'bloodstain2'];
is $g->(), "[flowerpot]";
$f = $g;
}
is $f->(), "[flowerpot]";
is $f->("Q"), "[Q]";
}
{
my $c = 0;
fun edelweiss($x = $c++) :prototype(;$) { $x }
}
is edelweiss "AAAAA", "AAAAA";
is_deeply edelweiss [], [];
is edelweiss, 0;
is edelweiss, 1;
is_deeply edelweiss {}, {};
is edelweiss 0, 0;
is edelweiss, 2;
for my $f (fun ($wtf = return 'ohi') { "~$wtf" }) {
is $f->(""), "~";
is $f->("a"), "~a";
is $f->(), "ohi";
}
is eval('fun (@x = 42) {}'), undef;
like $@, qr/default value/;
is eval('fun ($x, %y = ()) {}'), undef;
like $@, qr/default value/;
is eval('nofun ($x = 42) {}'), undef;
like $@, qr/nofun.*default argument/;
{
my $var = "outer";
fun scope_check(
$var, # inner
$snd = "${var}2", # initialized from $var)
$both = "$var and $snd",
) {
return $var, $snd, $both;
}
is_deeply [scope_check 'A'], ['A', 'A2', 'A and A2'];
is_deeply [scope_check 'B', 'C'], ['B', 'C', 'B and C'];
is_deeply [scope_check 4, 5, 6], [4, 5, 6];
is eval('fun ($QQQ = $QQQ) {}; 1'), undef;
like $@, qr/Global symbol.*\$QQQ.*explicit package name/;
use Function::Parameters { method => 'method' };
method mscope_check(
$var, # inner
$snd = "${var}2", # initialized from $var
$both = "($self) $var and $snd", # and $self!
) {
return $self, $var, $snd, $both;
}
is_deeply [mscope_check '$x', 'A'], ['$x', 'A', 'A2', '($x) A and A2'];
is_deeply [mscope_check '$x', 'B', 'C'], ['$x', 'B', 'C', '($x) B and C'];
is_deeply [mscope_check '$x', 4, 5, 6], ['$x', 4, 5, 6];
}
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