use Carp 'confess';
use Scalar::Util 'blessed', 'reftype';
-use B 'svref_2object';
use Sub::Exporter;
-our $VERSION = '0.13';
+our $VERSION = '0.22';
our $AUTHORITY = 'cpan:STEVAN';
-# Prototyped subs must be predeclared because we have a circular dependency
-# with Moose::Meta::Attribute et. al. so in case of us being use'd first the
-# predeclaration ensures the prototypes are in scope when consumers are
-# compiled
+## --------------------------------------------------------
+# Prototyped subs must be predeclared because we have a
+# circular dependency with Moose::Meta::Attribute et. al.
+# so in case of us being use'd first the predeclaration
+# ensures the prototypes are in scope when consumers are
+# compiled.
+
+# creation and location
+sub find_type_constraint ($);
+sub register_type_constraint ($);
+sub find_or_create_type_constraint ($;$);
+sub create_type_constraint_union (@);
+sub create_parameterized_type_constraint ($);
+sub create_class_type_constraint ($;$);
+sub create_enum_type_constraint ($$);
+#sub create_class_type_constraint ($);
+
+# dah sugah!
+sub type ($$;$$);
+sub subtype ($$;$$$);
+sub class_type ($;$);
+sub coerce ($@);
+sub as ($);
+sub from ($);
+sub where (&);
+sub via (&);
+sub message (&);
+sub optimize_as (&);
+sub enum ($;@);
-sub find_type_constraint ($);
+## private stuff ...
sub _create_type_constraint ($$$;$$);
sub _install_type_coercions ($$);
-sub create_type_constraint_union (@);
-sub type ($$;$$);
-sub subtype ($$;$$$);
-sub coerce ($@);
-sub as ($);
-sub from ($);
-sub where (&);
-sub via (&);
-sub message (&);
-sub optimize_as (&);
-sub enum ($;@);
+
+## --------------------------------------------------------
use Moose::Meta::TypeConstraint;
+use Moose::Meta::TypeConstraint::Union;
+use Moose::Meta::TypeConstraint::Parameterized;
+use Moose::Meta::TypeConstraint::Parameterizable;
+use Moose::Meta::TypeConstraint::Enum;
use Moose::Meta::TypeCoercion;
+use Moose::Meta::TypeCoercion::Union;
+use Moose::Meta::TypeConstraint::Registry;
+use Moose::Util::TypeConstraints::OptimizedConstraints;
my @exports = qw/
- type subtype as where message optimize_as
- coerce from via
+ type subtype class_type as where message optimize_as
+ coerce from via
enum
find_type_constraint
+ register_type_constraint
/;
-Sub::Exporter::setup_exporter({
+Sub::Exporter::setup_exporter({
exports => \@exports,
groups => { default => [':all'] }
});
sub unimport {
- no strict 'refs';
+ no strict 'refs';
my $class = caller();
# loop through the exports ...
foreach my $name (@exports) {
# if we find one ...
if (defined &{$class . '::' . $name}) {
my $keyword = \&{$class . '::' . $name};
-
+
# make sure it is from Moose
- my $pkg_name = eval { svref_2object($keyword)->GV->STASH->NAME };
+ my ($pkg_name) = Class::MOP::get_code_info($keyword);
next if $@;
next if $pkg_name ne 'Moose::Util::TypeConstraints';
-
+
# and if it is from Moose then undef the slot
delete ${$class . '::'}{$name};
}
}
}
-{
- my %TYPES;
- sub find_type_constraint ($) {
- return $TYPES{$_[0]}->[1]
- if exists $TYPES{$_[0]};
- return;
+## --------------------------------------------------------
+## type registry and some useful functions for it
+## --------------------------------------------------------
+
+my $REGISTRY = Moose::Meta::TypeConstraint::Registry->new;
+
+sub get_type_constraint_registry { $REGISTRY }
+sub list_all_type_constraints { keys %{$REGISTRY->type_constraints} }
+sub export_type_constraints_as_functions {
+ my $pkg = caller();
+ no strict 'refs';
+ foreach my $constraint (keys %{$REGISTRY->type_constraints}) {
+ my $tc = $REGISTRY->get_type_constraint($constraint)->_compiled_type_constraint;
+ *{"${pkg}::${constraint}"} = sub { $tc->($_[0]) ? 1 : undef };
}
-
- sub _dump_type_constraints {
- require Data::Dumper;
- Data::Dumper::Dumper(\%TYPES);
+}
+
+sub create_type_constraint_union (@) {
+ my @type_constraint_names;
+
+ if (scalar @_ == 1 && _detect_type_constraint_union($_[0])) {
+ @type_constraint_names = _parse_type_constraint_union($_[0]);
+ }
+ else {
+ @type_constraint_names = @_;
}
-
- sub _create_type_constraint ($$$;$$) {
- my $name = shift;
- my $parent = shift;
- my $check = shift || sub { 1 };
-
- my ($message, $optimized);
- for (@_) {
- $message = $_->{message} if exists $_->{message};
- $optimized = $_->{optimized} if exists $_->{optimized};
- }
- my $pkg_defined_in = scalar(caller(0));
-
- ($TYPES{$name}->[0] eq $pkg_defined_in)
- || confess ("The type constraint '$name' has already been created in "
- . $TYPES{$name}->[0] . " and cannot be created again in "
- . $pkg_defined_in)
- if defined $name && exists $TYPES{$name};
-
- $parent = find_type_constraint($parent) if defined $parent;
- my $constraint = Moose::Meta::TypeConstraint->new(
- name => $name || '__ANON__',
- parent => $parent,
- constraint => $check,
- message => $message,
- optimized => $optimized,
- );
- $TYPES{$name} = [ $pkg_defined_in, $constraint ] if defined $name;
- return $constraint;
+ (scalar @type_constraint_names >= 2)
+ || confess "You must pass in at least 2 type names to make a union";
+
+ ($REGISTRY->has_type_constraint($_))
+ || confess "Could not locate type constraint ($_) for the union"
+ foreach @type_constraint_names;
+
+ return Moose::Meta::TypeConstraint::Union->new(
+ type_constraints => [
+ map {
+ $REGISTRY->get_type_constraint($_)
+ } @type_constraint_names
+ ],
+ );
+}
+
+sub create_parameterized_type_constraint ($) {
+ my $type_constraint_name = shift;
+
+ my ($base_type, $type_parameter) = _parse_parameterized_type_constraint($type_constraint_name);
+
+ (defined $base_type && defined $type_parameter)
+ || confess "Could not parse type name ($type_constraint_name) correctly";
+
+ ($REGISTRY->has_type_constraint($base_type))
+ || confess "Could not locate the base type ($base_type)";
+
+ return Moose::Meta::TypeConstraint::Parameterized->new(
+ name => $type_constraint_name,
+ parent => $REGISTRY->get_type_constraint($base_type),
+ type_parameter => find_or_create_type_constraint(
+ $type_parameter => {
+ parent => $REGISTRY->get_type_constraint('Object'),
+ constraint => sub { $_[0]->isa($type_parameter) }
+ }
+ ),
+ );
+}
+
+#should we also support optimized checks?
+sub create_class_type_constraint ($;$) {
+ my $class = shift;
+ # too early for this check
+ #find_type_constraint("ClassName")->check($class)
+ # || confess "Can't create a class type constraint because '$class' is not a class name";
+ my $message;
+ if( $_[0] ){
+ $message = $_[0]->{message} if exists $_[0]->{message};
}
- sub _install_type_coercions ($$) {
- my ($type_name, $coercion_map) = @_;
- my $type = find_type_constraint($type_name);
- (!$type->has_coercion)
- || confess "The type coercion for '$type_name' has already been registered";
- my $type_coercion = Moose::Meta::TypeCoercion->new(
- type_coercion_map => $coercion_map,
- type_constraint => $type
- );
- $type->coercion($type_coercion);
+ # FIXME allow a different name too, and potentially handle anon
+ Moose::Meta::TypeConstraint::Class->new(
+ name => $class,
+ ($message ? (message => $message) : ())
+ );
+}
+
+sub find_or_create_type_constraint ($;$) {
+ my ($type_constraint_name, $options_for_anon_type) = @_;
+
+ return $REGISTRY->get_type_constraint($type_constraint_name)
+ if $REGISTRY->has_type_constraint($type_constraint_name);
+
+ my $constraint;
+
+ if (_detect_type_constraint_union($type_constraint_name)) {
+ $constraint = create_type_constraint_union($type_constraint_name);
}
-
- sub create_type_constraint_union (@) {
- my (@type_constraint_names) = @_;
- return Moose::Meta::TypeConstraint->union(
- map {
- find_type_constraint($_)
- } @type_constraint_names
+ elsif (_detect_parameterized_type_constraint($type_constraint_name)) {
+ $constraint = create_parameterized_type_constraint($type_constraint_name);
+ }
+ else {
+ # NOTE:
+ # if there is no $options_for_anon_type
+ # specified, then we assume they don't
+ # want to create one, and return nothing.
+ return unless defined $options_for_anon_type;
+
+ # NOTE:
+ # otherwise assume that we should create
+ # an ANON type with the $options_for_anon_type
+ # options which can be passed in. It should
+ # be noted that these don't get registered
+ # so we need to return it.
+ # - SL
+ return Moose::Meta::TypeConstraint->new(
+ name => '__ANON__',
+ %{$options_for_anon_type}
);
}
-
- sub export_type_constraints_as_functions {
- my $pkg = caller();
- no strict 'refs';
- foreach my $constraint (keys %TYPES) {
- *{"${pkg}::${constraint}"} = find_type_constraint($constraint)->_compiled_type_constraint;
- }
+
+ $REGISTRY->add_type_constraint($constraint);
+ return $constraint;
+}
+
+## --------------------------------------------------------
+## exported functions ...
+## --------------------------------------------------------
+
+sub find_type_constraint ($) {
+ my $type = shift;
+
+ if ( blessed $type and $type->isa("Moose::Meta::TypeConstraint") ) {
+ return $type;
+ } else {
+ return $REGISTRY->get_type_constraint($type);
}
-
- *Moose::Util::TypeConstraints::export_type_contstraints_as_functions = \&export_type_constraints_as_functions;
-
- sub list_all_type_constraints { keys %TYPES }
+}
+
+sub register_type_constraint ($) {
+ my $constraint = shift;
+ confess "can't register an unnamed type constraint" unless defined $constraint->name;
+ $REGISTRY->add_type_constraint($constraint);
+ return $constraint;
}
# type constructors
sub type ($$;$$) {
splice(@_, 1, 0, undef);
- goto &_create_type_constraint;
+ goto &_create_type_constraint;
}
sub subtype ($$;$$$) {
# but if the last arg is not a code
# ref then it is a subtype alias:
# subtype(MyNumbers => as Num); # now MyNumbers is the same as Num
- # ... yeah I know it's ugly code
+ # ... yeah I know it's ugly code
# - SL
- unshift @_ => undef if scalar @_ <= 2 && (reftype($_[1]) || '') eq 'CODE';
- goto &_create_type_constraint;
+ unshift @_ => undef if scalar @_ <= 2 && (reftype($_[1]) || '') eq 'CODE';
+ goto &_create_type_constraint;
+}
+
+sub class_type ($;$) {
+ register_type_constraint(
+ create_class_type_constraint(
+ $_[0],
+ ( defined($_[1]) ? $_[1] : () ),
+ )
+ );
}
sub coerce ($@) {
- my ($type_name, @coercion_map) = @_;
+ my ($type_name, @coercion_map) = @_;
_install_type_coercions($type_name, \@coercion_map);
}
sub enum ($;@) {
my ($type_name, @values) = @_;
+ # NOTE:
+ # if only an array-ref is passed then
+ # you get an anon-enum
+ # - SL
+ if (ref $type_name eq 'ARRAY' && !@values) {
+ @values = @$type_name;
+ $type_name = undef;
+ }
(scalar @values >= 2)
|| confess "You must have at least two values to enumerate through";
- my $regexp = join '|' => @values;
- _create_type_constraint(
- $type_name,
- 'Str',
- sub { qr/^$regexp$/i }
- );
+ my %valid = map { $_ => 1 } @values;
+
+ register_type_constraint(
+ create_enum_type_constraint(
+ $type_name,
+ \@values,
+ )
+ );
+}
+
+sub create_enum_type_constraint ($$) {
+ my ( $type_name, $values ) = @_;
+
+ Moose::Meta::TypeConstraint::Enum->new(
+ name => $type_name || '__ANON__',
+ values => $values,
+ );
+}
+
+## --------------------------------------------------------
+## desugaring functions ...
+## --------------------------------------------------------
+
+sub _create_type_constraint ($$$;$$) {
+ my $name = shift;
+ my $parent = shift;
+ my $check = shift;
+
+ my ($message, $optimized);
+ for (@_) {
+ $message = $_->{message} if exists $_->{message};
+ $optimized = $_->{optimized} if exists $_->{optimized};
+ }
+
+ my $pkg_defined_in = scalar(caller(0));
+
+ if (defined $name) {
+ my $type = $REGISTRY->get_type_constraint($name);
+
+ ($type->_package_defined_in eq $pkg_defined_in)
+ || confess ("The type constraint '$name' has already been created in "
+ . $type->_package_defined_in . " and cannot be created again in "
+ . $pkg_defined_in)
+ if defined $type;
+ }
+
+ $parent = find_or_create_type_constraint($parent) if defined $parent;
+
+ my $constraint = Moose::Meta::TypeConstraint->new(
+ name => $name || '__ANON__',
+ package_defined_in => $pkg_defined_in,
+
+ ($parent ? (parent => $parent ) : ()),
+ ($check ? (constraint => $check) : ()),
+ ($message ? (message => $message) : ()),
+ ($optimized ? (optimized => $optimized) : ()),
+ );
+
+ # NOTE:
+ # if we have a type constraint union, and no
+ # type check, this means we are just aliasing
+ # the union constraint, which means we need to
+ # handle this differently.
+ # - SL
+ if (not(defined $check)
+ && $parent->isa('Moose::Meta::TypeConstraint::Union')
+ && $parent->has_coercion
+ ){
+ $constraint->coercion(Moose::Meta::TypeCoercion::Union->new(
+ type_constraint => $parent
+ ));
+ }
+
+ $REGISTRY->add_type_constraint($constraint)
+ if defined $name;
+
+ return $constraint;
+}
+
+sub _install_type_coercions ($$) {
+ my ($type_name, $coercion_map) = @_;
+ my $type = $REGISTRY->get_type_constraint($type_name);
+ (defined $type)
+ || confess "Cannot find type '$type_name', perhaps you forgot to load it.";
+ if ($type->has_coercion) {
+ $type->coercion->add_type_coercions(@$coercion_map);
+ }
+ else {
+ my $type_coercion = Moose::Meta::TypeCoercion->new(
+ type_coercion_map => $coercion_map,
+ type_constraint => $type
+ );
+ $type->coercion($type_coercion);
+ }
+}
+
+## --------------------------------------------------------
+## type notation parsing ...
+## --------------------------------------------------------
+
+{
+ # All I have to say is mugwump++ cause I know
+ # do not even have enough regexp-fu to be able
+ # to have written this (I can only barely
+ # understand it as it is)
+ # - SL
+
+ use re "eval";
+
+ my $valid_chars = qr{[\w:]};
+ my $type_atom = qr{ $valid_chars+ };
+
+ my $type = qr{ $valid_chars+ (?: \[ (??{$any}) \] )? }x;
+ my $type_capture_parts = qr{ ($valid_chars+) (?: \[ ((??{$any})) \] )? }x;
+ my $type_with_parameter = qr{ $valid_chars+ \[ (??{$any}) \] }x;
+
+ my $op_union = qr{ \s* \| \s* }x;
+ my $union = qr{ $type (?: $op_union $type )+ }x;
+
+ our $any = qr{ $type | $union }x;
+
+ sub _parse_parameterized_type_constraint {
+ $_[0] =~ m{ $type_capture_parts }x;
+ return ($1, $2);
+ }
+
+ sub _detect_parameterized_type_constraint {
+ $_[0] =~ m{ ^ $type_with_parameter $ }x;
+ }
+
+ sub _parse_type_constraint_union {
+ my $given = shift;
+ my @rv;
+ while ( $given =~ m{ \G (?: $op_union )? ($type) }gcx ) {
+ push @rv => $1;
+ }
+ (pos($given) eq length($given))
+ || confess "'$given' didn't parse (parse-pos="
+ . pos($given)
+ . " and str-length="
+ . length($given)
+ . ")";
+ @rv;
+ }
+
+ sub _detect_type_constraint_union {
+ $_[0] =~ m{^ $type $op_union $type ( $op_union .* )? $}x;
+ }
}
-# define some basic types
+## --------------------------------------------------------
+# define some basic built-in types
+## --------------------------------------------------------
type 'Any' => where { 1 }; # meta-type including all
-type 'Item' => where { 1 }; # base-type
+type 'Item' => where { 1 }; # base-type
subtype 'Undef' => as 'Item' => where { !defined($_) };
subtype 'Defined' => as 'Item' => where { defined($_) };
subtype 'Bool'
- => as 'Item'
+ => as 'Item'
=> where { !defined($_) || $_ eq "" || "$_" eq '1' || "$_" eq '0' };
-subtype 'Value'
- => as 'Defined'
- => where { !ref($_) }
- => optimize_as { defined($_[0]) && !ref($_[0]) };
-
+subtype 'Value'
+ => as 'Defined'
+ => where { !ref($_) }
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Value;
+
subtype 'Ref'
- => as 'Defined'
- => where { ref($_) }
- => optimize_as { ref($_[0]) };
-
-subtype 'Str'
- => as 'Value'
- => where { 1 }
- => optimize_as { defined($_[0]) && !ref($_[0]) };
-
-subtype 'Num'
- => as 'Value'
- => where { Scalar::Util::looks_like_number($_) }
- => optimize_as { !ref($_[0]) && Scalar::Util::looks_like_number($_[0]) };
-
-subtype 'Int'
- => as 'Num'
+ => as 'Defined'
+ => where { ref($_) }
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Ref;
+
+subtype 'Str'
+ => as 'Value'
+ => where { 1 }
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Str;
+
+subtype 'Num'
+ => as 'Value'
+ => where { Scalar::Util::looks_like_number($_) }
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Num;
+
+subtype 'Int'
+ => as 'Num'
=> where { "$_" =~ /^-?[0-9]+$/ }
- => optimize_as { defined($_[0]) && !ref($_[0]) && $_[0] =~ /^-?[0-9]+$/ };
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Int;
-subtype 'ScalarRef' => as 'Ref' => where { ref($_) eq 'SCALAR' } => optimize_as { ref($_[0]) eq 'SCALAR' };
-subtype 'ArrayRef' => as 'Ref' => where { ref($_) eq 'ARRAY' } => optimize_as { ref($_[0]) eq 'ARRAY' };
-subtype 'HashRef' => as 'Ref' => where { ref($_) eq 'HASH' } => optimize_as { ref($_[0]) eq 'HASH' };
-subtype 'CodeRef' => as 'Ref' => where { ref($_) eq 'CODE' } => optimize_as { ref($_[0]) eq 'CODE' };
-subtype 'RegexpRef' => as 'Ref' => where { ref($_) eq 'Regexp' } => optimize_as { ref($_[0]) eq 'Regexp' };
-subtype 'GlobRef' => as 'Ref' => where { ref($_) eq 'GLOB' } => optimize_as { ref($_[0]) eq 'GLOB' };
+subtype 'ScalarRef' => as 'Ref' => where { ref($_) eq 'SCALAR' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::ScalarRef;
+subtype 'CodeRef' => as 'Ref' => where { ref($_) eq 'CODE' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::CodeRef;
+subtype 'RegexpRef' => as 'Ref' => where { ref($_) eq 'Regexp' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::RegexpRef;
+subtype 'GlobRef' => as 'Ref' => where { ref($_) eq 'GLOB' } => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::GlobRef;
# NOTE:
-# scalar filehandles are GLOB refs,
+# scalar filehandles are GLOB refs,
# but a GLOB ref is not always a filehandle
-subtype 'FileHandle'
- => as 'GlobRef'
- => where { Scalar::Util::openhandle($_) }
- => optimize_as { ref($_[0]) eq 'GLOB' && Scalar::Util::openhandle($_[0]) };
+subtype 'FileHandle'
+ => as 'GlobRef'
+ => where { Scalar::Util::openhandle($_) || ( blessed($_) && $_->isa("IO::Handle") ) }
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::FileHandle;
-# NOTE:
+# NOTE:
# blessed(qr/.../) returns true,.. how odd
-subtype 'Object'
- => as 'Ref'
+subtype 'Object'
+ => as 'Ref'
=> where { blessed($_) && blessed($_) ne 'Regexp' }
- => optimize_as { blessed($_[0]) && blessed($_[0]) ne 'Regexp' };
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Object;
-subtype 'Role'
- => as 'Object'
+subtype 'Role'
+ => as 'Object'
=> where { $_->can('does') }
- => optimize_as { blessed($_[0]) && $_[0]->can('does') };
-
-subtype 'ClassName'
- => as 'Str'
- => where { eval { $_->isa('UNIVERSAL') } }
- => optimize_as { !ref($_[0]) && eval { $_[0]->isa('UNIVERSAL') } };
+ => optimize_as \&Moose::Util::TypeConstraints::OptimizedConstraints::Role;
+
+my $_class_name_checker = sub {
+ return if ref($_[0]);
+ return unless defined($_[0]) && length($_[0]);
+
+ # walk the symbol table tree to avoid autovififying
+ # \*{${main::}{"Foo::"}} == \*main::Foo::
+
+ my $pack = \*::;
+ foreach my $part (split('::', $_[0])) {
+ return unless exists ${$$pack}{"${part}::"};
+ $pack = \*{${$$pack}{"${part}::"}};
+ }
+
+ # check for $VERSION or @ISA
+ return 1 if exists ${$$pack}{VERSION}
+ && defined *{${$$pack}{VERSION}}{SCALAR};
+ return 1 if exists ${$$pack}{ISA}
+ && defined *{${$$pack}{ISA}}{ARRAY};
+
+ # check for any method
+ foreach ( keys %{$$pack} ) {
+ next if substr($_, -2, 2) eq '::';
+ return 1 if defined *{${$$pack}{$_}}{CODE};
+ }
+
+ # fail
+ return;
+};
+
+subtype 'ClassName'
+ => as 'Str'
+ => $_class_name_checker # where ...
+ => { optimize => $_class_name_checker };
+
+## --------------------------------------------------------
+# parameterizable types ...
+
+$REGISTRY->add_type_constraint(
+ Moose::Meta::TypeConstraint::Parameterizable->new(
+ name => 'ArrayRef',
+ package_defined_in => __PACKAGE__,
+ parent => find_type_constraint('Ref'),
+ constraint => sub { ref($_) eq 'ARRAY' },
+ optimized => \&Moose::Util::TypeConstraints::OptimizedConstraints::ArrayRef,
+ constraint_generator => sub {
+ my $type_parameter = shift;
+ my $check = $type_parameter->_compiled_type_constraint;
+ return sub {
+ foreach my $x (@$_) {
+ ($check->($x)) || return
+ } 1;
+ }
+ }
+ )
+);
+
+$REGISTRY->add_type_constraint(
+ Moose::Meta::TypeConstraint::Parameterizable->new(
+ name => 'HashRef',
+ package_defined_in => __PACKAGE__,
+ parent => find_type_constraint('Ref'),
+ constraint => sub { ref($_) eq 'HASH' },
+ optimized => \&Moose::Util::TypeConstraints::OptimizedConstraints::HashRef,
+ constraint_generator => sub {
+ my $type_parameter = shift;
+ my $check = $type_parameter->_compiled_type_constraint;
+ return sub {
+ foreach my $x (values %$_) {
+ ($check->($x)) || return
+ } 1;
+ }
+ }
+ )
+);
+
+$REGISTRY->add_type_constraint(
+ Moose::Meta::TypeConstraint::Parameterizable->new(
+ name => 'Maybe',
+ package_defined_in => __PACKAGE__,
+ parent => find_type_constraint('Item'),
+ constraint => sub { 1 },
+ constraint_generator => sub {
+ my $type_parameter = shift;
+ my $check = $type_parameter->_compiled_type_constraint;
+ return sub {
+ return 1 if not(defined($_)) || $check->($_);
+ return;
+ }
+ }
+ )
+);
+
+my @PARAMETERIZABLE_TYPES = map {
+ $REGISTRY->get_type_constraint($_)
+} qw[ArrayRef HashRef Maybe];
+
+sub get_all_parameterizable_types { @PARAMETERIZABLE_TYPES }
+sub add_parameterizable_type {
+ my $type = shift;
+ (blessed $type && $type->isa('Moose::Meta::TypeConstraint::Parameterizable'))
+ || confess "Type must be a Moose::Meta::TypeConstraint::Parameterizable not $type";
+ push @PARAMETERIZABLE_TYPES => $type;
+}
+
+## --------------------------------------------------------
+# end of built-in types ...
+## --------------------------------------------------------
{
my @BUILTINS = list_all_type_constraints();
use Moose::Util::TypeConstraints;
type 'Num' => where { Scalar::Util::looks_like_number($_) };
-
- subtype 'Natural'
- => as 'Num'
+
+ subtype 'Natural'
+ => as 'Num'
=> where { $_ > 0 };
-
- subtype 'NaturalLessThanTen'
+
+ subtype 'NaturalLessThanTen'
=> as 'Natural'
=> where { $_ < 10 }
=> message { "This number ($_) is not less than ten!" };
-
- coerce 'Num'
+
+ coerce 'Num'
=> from 'Str'
- => via { 0+$_ };
-
+ => via { 0+$_ };
+
enum 'RGBColors' => qw(red green blue);
=head1 DESCRIPTION
-This module provides Moose with the ability to create custom type
-contraints to be used in attribute definition.
+This module provides Moose with the ability to create custom type
+contraints to be used in attribute definition.
=head2 Important Caveat
-This is B<NOT> a type system for Perl 5. These are type constraints,
-and they are not used by Moose unless you tell it to. No type
-inference is performed, expression are not typed, etc. etc. etc.
+This is B<NOT> a type system for Perl 5. These are type constraints,
+and they are not used by Moose unless you tell it to. No type
+inference is performed, expression are not typed, etc. etc. etc.
-This is simply a means of creating small constraint functions which
-can be used to simplify your own type-checking code.
+This is simply a means of creating small constraint functions which
+can be used to simplify your own type-checking code, with the added
+side benefit of making your intentions clearer through self-documentation.
=head2 Slightly Less Important Caveat
-It is almost always a good idea to quote your type and subtype names.
-This is to prevent perl from trying to execute the call as an indirect
+It is B<always> a good idea to quote your type and subtype names.
+
+This is to prevent perl from trying to execute the call as an indirect
object call. This issue only seems to come up when you have a subtype
-the same name as a valid class, but when the issue does arise it tends
-to be quite annoying to debug.
+the same name as a valid class, but when the issue does arise it tends
+to be quite annoying to debug.
So for instance, this:
-
+
subtype DateTime => as Object => where { $_->isa('DateTime') };
will I<Just Work>, while this:
use DateTime;
subtype DateTime => as Object => where { $_->isa('DateTime') };
-will fail silently and cause many headaches. The simple way to solve
-this, as well as future proof your subtypes from classes which have
+will fail silently and cause many headaches. The simple way to solve
+this, as well as future proof your subtypes from classes which have
yet to have been created yet, is to simply do this:
use DateTime;
=head2 Default Type Constraints
-This module also provides a simple hierarchy for Perl 5 types, this
-could probably use some work, but it works for me at the moment.
+This module also provides a simple hierarchy for Perl 5 types, here is
+that hierarchy represented visually.
Any
- Item
+ Item
Bool
+ Maybe[`a]
Undef
Defined
Value
ClassName
Ref
ScalarRef
- ArrayRef
- HashRef
+ ArrayRef[`a]
+ HashRef[`a]
CodeRef
RegexpRef
GlobRef
FileHandle
- Object
+ Object
Role
-Suggestions for improvement are welcome.
+B<NOTE:> Any type followed by a type parameter C<[`a]> can be
+parameterized, this means you can say:
+
+ ArrayRef[Int] # an array of intergers
+ HashRef[CodeRef] # a hash of str to CODE ref mappings
+ Maybe[Str] # value may be a string, may be undefined
-B<NOTE:> The C<Undef> type constraint does not work correctly
-in every occasion, please use it sparringly.
+B<NOTE:> The C<Undef> type constraint for the most part works
+correctly now, but edge cases may still exist, please use it
+sparringly.
-B<NOTE:> The C<ClassName> type constraint is simply a subtype
-of string which responds true to C<isa('UNIVERSAL')>. This means
-that your class B<must> be loaded for this type constraint to
-pass. I know this is not ideal for all, but it is a saner
-restriction then most others.
+B<NOTE:> The C<ClassName> type constraint does a complex package
+existence check. This means that your class B<must> be loaded for
+this type constraint to pass. I know this is not ideal for all,
+but it is a saner restriction than most others.
+
+=head2 Type Constraint Naming
+
+Since the types created by this module are global, it is suggested
+that you namespace your types just as you would namespace your
+modules. So instead of creating a I<Color> type for your B<My::Graphics>
+module, you would call the type I<My::Graphics::Color> instead.
=head2 Use with Other Constraint Modules
-This module should play fairly nicely with other constraint
-modules with only some slight tweaking. The C<where> clause
+This module should play fairly nicely with other constraint
+modules with only some slight tweaking. The C<where> clause
in types is expected to be a C<CODE> reference which checks
-it's first argument and returns a bool. Since most constraint
-modules work in a similar way, it should be simple to adapt
+it's first argument and returns a boolean. Since most constraint
+modules work in a similar way, it should be simple to adapt
them to work with Moose.
-For instance, this is how you could use it with
-L<Declare::Constraints::Simple> to declare a completely new type.
+For instance, this is how you could use it with
+L<Declare::Constraints::Simple> to declare a completely new type.
- type 'HashOfArrayOfObjects'
+ type 'HashOfArrayOfObjects'
=> IsHashRef(
-keys => HasLength,
-values => IsArrayRef( IsObject ));
-For more examples see the F<t/204_example_w_DCS.t> test file.
+For more examples see the F<t/200_examples/204_example_w_DCS.t>
+test file.
-Here is an example of using L<Test::Deep> and it's non-test
-related C<eq_deeply> function.
+Here is an example of using L<Test::Deep> and it's non-test
+related C<eq_deeply> function.
- type 'ArrayOfHashOfBarsAndRandomNumbers'
+ type 'ArrayOfHashOfBarsAndRandomNumbers'
=> where {
- eq_deeply($_,
+ eq_deeply($_,
array_each(subhashof({
bar => isa('Bar'),
random_number => ignore()
- })))
+ })))
};
-For a complete example see the F<t/205_example_w_TestDeep.t>
-test file.
-
-=head1 FUNCTIONS
-
-=head2 Type Constraint Registry
-
-=over 4
-
-=item B<find_type_constraint ($type_name)>
-
-This function can be used to locate a specific type constraint
-meta-object. What you do with it from there is up to you :)
-
-=item B<create_type_constraint_union (@type_constraint_names)>
-
-Given a list of C<@type_constraint_names>, this will return a
-B<Moose::Meta::TypeConstraint::Union> instance.
-
-=item B<export_type_constraints_as_functions>
-
-This will export all the current type constraints as functions
-into the caller's namespace. Right now, this is mostly used for
-testing, but it might prove useful to others.
-
-=item B<export_type_contstraints_as_functions>
-
-Alias for the above function.
-
-=item B<list_all_type_constraints>
-
-This will return a list of type constraint names, you can then
-fetch them using C<find_type_constraint ($type_name)> if you
-want to.
-
-=item B<list_all_builtin_type_constraints>
+For a complete example see the
+F<t/200_examples/205_example_w_TestDeep.t> test file.
-This will return a list of builtin type constraints, meaning,
-those which are defined in this module. See the section
-labeled L<Default Type Constraints> for a complete list.
-
-=back
+=head1 FUNCTIONS
=head2 Type Constraint Constructors
-The following functions are used to create type constraints.
-They will then register the type constraints in a global store
-where Moose can get to them if it needs to.
+The following functions are used to create type constraints.
+They will then register the type constraints in a global store
+where Moose can get to them if it needs to.
See the L<SYNOPSIS> for an example of how to use these.
=item B<type ($name, $where_clause)>
-This creates a base type, which has no parent.
+This creates a base type, which has no parent.
=item B<subtype ($name, $parent, $where_clause, ?$message)>
-This creates a named subtype.
+This creates a named subtype.
=item B<subtype ($parent, $where_clause, ?$message)>
-This creates an unnamed subtype and will return the type
-constraint meta-object, which will be an instance of
-L<Moose::Meta::TypeConstraint>.
+This creates an unnamed subtype and will return the type
+constraint meta-object, which will be an instance of
+L<Moose::Meta::TypeConstraint>.
+
+=item B<class_type ($class, ?$message)>
+
+Creates a type constraint with the name C<$class> and the metaclass
+L<Moose::Meta::TypeConstraint::Class>.
=item B<enum ($name, @values)>
-This will create a basic subtype for a given set of strings.
-The resulting constraint will be a subtype of C<Str> and
-will match any of the items in C<@values>. See the L<SYNOPSIS>
-for a simple example.
+This will create a basic subtype for a given set of strings.
+The resulting constraint will be a subtype of C<Str> and
+will match any of the items in C<@values>. It is case sensitive.
+See the L<SYNOPSIS> for a simple example.
-B<NOTE:> This is not a true proper enum type, it is simple
+B<NOTE:> This is not a true proper enum type, it is simple
a convient constraint builder.
+=item B<enum (\@values)>
+
+If passed an ARRAY reference instead of the C<$name>, C<@values> pair,
+this will create an unnamed enum. This can then be used in an attribute
+definition like so:
+
+ has 'sort_order' => (
+ is => 'ro',
+ isa => enum([qw[ ascending descending ]]),
+ );
+
=item B<as>
This is just sugar for the type constraint construction syntax.
=item B<optimize_as>
-This can be used to define a "hand optimized" version of your
+This can be used to define a "hand optimized" version of your
type constraint which can be used to avoid traversing a subtype
-constraint heirarchy.
+constraint heirarchy.
-B<NOTE:> You should only use this if you know what you are doing,
-all the built in types use this, so your subtypes (assuming they
+B<NOTE:> You should only use this if you know what you are doing,
+all the built in types use this, so your subtypes (assuming they
are shallow) will not likely need to use this.
=back
=head2 Type Coercion Constructors
-Type constraints can also contain type coercions as well. If you
-ask your accessor too coerce, the Moose will run the type-coercion
-code first, followed by the type constraint check. This feature
-should be used carefully as it is very powerful and could easily
+Type constraints can also contain type coercions as well. If you
+ask your accessor to coerce, then Moose will run the type-coercion
+code first, followed by the type constraint check. This feature
+should be used carefully as it is very powerful and could easily
take off a limb if you are not careful.
See the L<SYNOPSIS> for an example of how to use these.
=back
+=head2 Type Constraint Construction & Locating
+
+=over 4
+
+=item B<create_type_constraint_union ($pipe_seperated_types | @type_constraint_names)>
+
+Given string with C<$pipe_seperated_types> or a list of C<@type_constraint_names>,
+this will return a L<Moose::Meta::TypeConstraint::Union> instance.
+
+=item B<create_parameterized_type_constraint ($type_name)>
+
+Given a C<$type_name> in the form of:
+
+ BaseType[ContainerType]
+
+this will extract the base type and container type and build an instance of
+L<Moose::Meta::TypeConstraint::Parameterized> for it.
+
+=item B<create_class_type_constraint ($class, ?$message)>
+
+Given a class name it will create a new L<Moose::Meta::TypeConstraint::Class>
+object for that class name.
+
+=item B<create_enum_type_constraint ($name, $values)>
+
+=item B<find_or_create_type_constraint ($type_name, ?$options_for_anon_type)>
+
+This will attempt to find or create a type constraint given the a C<$type_name>.
+If it cannot find it in the registry, it will see if it should be a union or
+container type an create one if appropriate, and lastly if nothing can be
+found or created that way, it will create an anon-type using the
+C<$options_for_anon_type> HASH ref to populate it. If the C<$options_for_anon_type>
+is not specified (it is C<undef>), then it will not create anything and simply
+return.
+
+=item B<find_type_constraint ($type_name)>
+
+This function can be used to locate a specific type constraint
+meta-object, of the class L<Moose::Meta::TypeConstraint> or a
+derivative. What you do with it from there is up to you :)
+
+=item B<register_type_constraint ($type_object)>
+
+This function will register a named type constraint with the type registry.
+
+=item B<get_type_constraint_registry>
+
+Fetch the L<Moose::Meta::TypeConstraint::Registry> object which
+keeps track of all type constraints.
+
+=item B<list_all_type_constraints>
+
+This will return a list of type constraint names, you can then
+fetch them using C<find_type_constraint ($type_name)> if you
+want to.
+
+=item B<list_all_builtin_type_constraints>
+
+This will return a list of builtin type constraints, meaning,
+those which are defined in this module. See the section
+labeled L<Default Type Constraints> for a complete list.
+
+=item B<export_type_constraints_as_functions>
+
+This will export all the current type constraints as functions
+into the caller's namespace. Right now, this is mostly used for
+testing, but it might prove useful to others.
+
+=item B<get_all_parameterizable_types>
+
+This returns all the parameterizable types that have been registered.
+
+=item B<add_parameterizable_type ($type)>
+
+Adds C<$type> to the list of parameterizable types
+
+=back
+
=head2 Namespace Management
=over 4
=item B<unimport>
-This will remove all the type constraint keywords from the
+This will remove all the type constraint keywords from the
calling class namespace.
=back
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
=head1 COPYRIGHT AND LICENSE
-Copyright 2006, 2007 by Infinity Interactive, Inc.
+Copyright 2006-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+it under the same terms as Perl itself.
=cut
projects / gitmo/Moose.git / blobdiff