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|
package Types::Standard::ScalarRef;
use 5.006001;
use strict;
use warnings;
BEGIN {
$Types::Standard::ScalarRef::AUTHORITY = 'cpan:TOBYINK';
$Types::Standard::ScalarRef::VERSION = '1.016007';
}
$Types::Standard::ScalarRef::VERSION =~ tr/_//d;
use Types::Standard ();
use Types::TypeTiny ();
sub _croak ($;@) { require Error::TypeTiny; goto \&Error::TypeTiny::croak }
no warnings;
sub __constraint_generator {
return Types::Standard::ScalarRef unless @_;
my $param = shift;
Types::TypeTiny::is_TypeTiny( $param )
or _croak(
"Parameter to ScalarRef[`a] expected to be a type constraint; got $param" );
return sub {
my $ref = shift;
$param->check( $$ref ) || return;
return !!1;
};
} #/ sub __constraint_generator
sub __inline_generator {
my $param = shift;
return unless $param->can_be_inlined;
return sub {
my $v = $_[1];
my $param_check = $param->inline_check( "\${$v}" );
"(ref($v) eq 'SCALAR' or ref($v) eq 'REF') and $param_check";
};
}
sub __deep_explanation {
my ( $type, $value, $varname ) = @_;
my $param = $type->parameters->[0];
for my $item ( $$value ) {
next if $param->check( $item );
return [
sprintf(
'"%s" constrains the referenced scalar value with "%s"', $type, $param
),
@{ $param->validate_explain( $item, sprintf( '${%s}', $varname ) ) },
];
}
# This should never happen...
return; # uncoverable statement
} #/ sub __deep_explanation
sub __coercion_generator {
my ( $parent, $child, $param ) = @_;
return unless $param->has_coercion;
my $coercable_item = $param->coercion->_source_type_union;
my $C = "Type::Coercion"->new( type_constraint => $child );
if ( $param->coercion->can_be_inlined and $coercable_item->can_be_inlined ) {
$C->add_type_coercions(
$parent => Types::Standard::Stringable {
my @code;
push @code, 'do { my ($orig, $return_orig, $new) = ($_, 0);';
push @code, 'for ($$orig) {';
push @code,
sprintf(
'++$return_orig && last unless (%s);',
$coercable_item->inline_check( '$_' )
);
push @code,
sprintf(
'$new = (%s);',
$param->coercion->inline_coercion( '$_' )
);
push @code, '}';
push @code, '$return_orig ? $orig : \\$new';
push @code, '}';
"@code";
}
);
} #/ if ( $param->coercion->...)
else {
$C->add_type_coercions(
$parent => sub {
my $value = @_ ? $_[0] : $_;
my $new;
for my $item ( $$value ) {
return $value unless $coercable_item->check( $item );
$new = $param->coerce( $item );
}
return \$new;
},
);
} #/ else [ if ( $param->coercion->...)]
return $C;
} #/ sub __coercion_generator
1;
__END__
=pod
=encoding utf-8
=head1 NAME
Types::Standard::ScalarRef - internals for the Types::Standard ScalarRef type constraint
=head1 STATUS
This module is considered part of Type-Tiny's internals. It is not
covered by the
L<Type-Tiny stability policy|Type::Tiny::Manual::Policies/"STABILITY">.
=head1 DESCRIPTION
This file contains some of the guts for L<Types::Standard>.
It will be loaded on demand. You may ignore its presence.
=head1 BUGS
Please report any bugs to
L<https://github.com/tobyink/p5-type-tiny/issues>.
=head1 SEE ALSO
L<Types::Standard>.
=head1 AUTHOR
Toby Inkster E<lt>tobyink@cpan.orgE<gt>.
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2013-2014, 2017-2022 by Toby Inkster.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=head1 DISCLAIMER OF WARRANTIES
THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
