#!perl

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

use Test::More tests => 49;
use Test::Fatal;

{
    use Function::Parameters {};  # ZERO BABIES

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

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

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

    pound foo_1($x, $u) { $x }
    is foo_1(2 + 2), 4;

    no Function::Parameters qw(pound);

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

{
    use Function::Parameters { pound => 'method' };

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

    pound foo_2($u) { $self }
    is foo_2(2 + 2), 4;

    no Function::Parameters qw(pound);

    is eval('pound unfoo :() {}; 1'), undef;
    like $@, qr/syntax error/;
}

{
    is eval('pound unfoo( ){}; 1'), undef;
    like $@, qr/syntax error/;

    use Function::Parameters { pound => 'classmethod' };

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

    pound foo_3($u) { $class }
    is foo_3(2 + 2), 4;

    no Function::Parameters;

    is eval('pound unfoo :lvalue{}; 1'), undef;
    like $@, qr/syntax error/;
}

{
    use Function::Parameters { pound => 'function_strict' };

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

    pound foo_4($x) { $x }
    is foo_4(2 + 2), 4;

    like exception { foo_4(5, 6) }, qr/Too many arguments/;

    no Function::Parameters qw(pound);

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

{
    use Function::Parameters { pound => 'method_strict' };

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

    pound foo_5() { $self }
    is foo_5(2 + 2), 4;

    like exception { foo_5(5, 6) }, qr/Too many arguments/;

    no Function::Parameters qw(pound);

    is eval('pound unfoo :() {}; 1'), undef;
    like $@, qr/syntax error/;
}

{
    is eval('pound unfoo( ){}; 1'), undef;
    like $@, qr/syntax error/;

    use Function::Parameters { pound => 'classmethod_strict' };

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

    pound foo_6() { $class }
    is foo_6(2 + 2), 4;

    like exception { foo_6(5, 6) }, qr/Too many arguments/;

    no Function::Parameters;

    is eval('pound unfoo :lvalue{}; 1'), undef;
    like $@, qr/syntax error/;
}

like exception { Function::Parameters->import(":QQQQ") }, qr/not exported/;

like exception { Function::Parameters->import({":QQQQ" => "function"}) }, qr/valid identifier/;

like exception { Function::Parameters->import({"jetsam" => "QQQQ"}) }, qr/valid type/;

like exception { Function::Parameters->import({}, undef) }, qr/Too many arguments/;

like exception { Function::Parameters->import("g", "h") }, qr/Too many arguments/;

like exception { Function::Parameters->import("g", "h", "i") }, qr/Too many arguments/;

for my $kw ('', '42', 'A::B', 'a b') {
    like exception { Function::Parameters->import({ $kw => 'function' }) }, qr/valid identifier /;
}