X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FAttribute.pm;h=4344c277498840730027c2edd1eabf900732558c;hb=684db121da77d6c63be5a58e33606907ca2aa4fb;hp=0f0475931b708d15186228af3c487655b30642cd;hpb=3b8fe109e938b2c1cbd70d8072210dd22cd57f35;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index 0f04759..4344c27 100644
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -1,51 +1,50 @@
-#!/usr/bin/env perl
 package Mouse::Meta::Attribute;
 use strict;
 use warnings;
 require overload;
 
 use Carp 'confess';
-use Mouse::Util qw/blessed weaken/;
+use Scalar::Util ();
+use Mouse::Meta::TypeConstraint;
 
 sub new {
-    my $class = shift;
-    my %args  = @_;
+    my ($class, $name, %options) = @_;
 
-    my $name = $args{name};
+    $options{name} = $name;
 
-    $args{init_arg} = $name
-        unless exists $args{init_arg};
+    $options{init_arg} = $name
+        unless exists $options{init_arg};
 
-    $args{is} ||= '';
+    $options{is} ||= '';
 
-    bless \%args, $class;
+    bless \%options, $class;
 }
 
-sub name              { $_[0]->{name}             }
-sub associated_class  { $_[0]->{associated_class} }
-sub _is_metadata      { $_[0]->{is}               }
-sub is_required       { $_[0]->{required}         }
-sub default           { $_[0]->{default}          }
-sub is_lazy           { $_[0]->{lazy}             }
-sub is_lazy_build     { $_[0]->{lazy_build}       }
-sub predicate         { $_[0]->{predicate}        }
-sub clearer           { $_[0]->{clearer}          }
-sub handles           { $_[0]->{handles}          }
-sub is_weak_ref       { $_[0]->{weak_ref}         }
-sub init_arg          { $_[0]->{init_arg}         }
-sub type_constraint   { $_[0]->{type_constraint}  }
-sub trigger           { $_[0]->{trigger}          }
-sub builder           { $_[0]->{builder}          }
-sub should_auto_deref { $_[0]->{auto_deref}       }
-sub should_coerce     { $_[0]->{should_coerce}    }
-
-sub has_default         { exists $_[0]->{default}         }
-sub has_predicate       { exists $_[0]->{predicate}       }
-sub has_clearer         { exists $_[0]->{clearer}         }
-sub has_handles         { exists $_[0]->{handles}         }
-sub has_type_constraint { exists $_[0]->{type_constraint} }
-sub has_trigger         { exists $_[0]->{trigger}         }
-sub has_builder         { exists $_[0]->{builder}         }
+sub name                 { $_[0]->{name}                   }
+sub associated_class     { $_[0]->{associated_class}       }
+sub _is_metadata         { $_[0]->{is}                     }
+sub is_required          { $_[0]->{required}               }
+sub default              { $_[0]->{default}                }
+sub is_lazy              { $_[0]->{lazy}                   }
+sub is_lazy_build        { $_[0]->{lazy_build}             }
+sub predicate            { $_[0]->{predicate}              }
+sub clearer              { $_[0]->{clearer}                }
+sub handles              { $_[0]->{handles}                }
+sub is_weak_ref          { $_[0]->{weak_ref}               }
+sub init_arg             { $_[0]->{init_arg}               }
+sub type_constraint      { $_[0]->{type_constraint}        }
+sub trigger              { $_[0]->{trigger}                }
+sub builder              { $_[0]->{builder}                }
+sub should_auto_deref    { $_[0]->{auto_deref}             }
+sub should_coerce        { $_[0]->{should_coerce}          }
+
+sub has_default          { exists $_[0]->{default}         }
+sub has_predicate        { exists $_[0]->{predicate}       }
+sub has_clearer          { exists $_[0]->{clearer}         }
+sub has_handles          { exists $_[0]->{handles}         }
+sub has_type_constraint  { exists $_[0]->{type_constraint} }
+sub has_trigger          { exists $_[0]->{trigger}         }
+sub has_builder          { exists $_[0]->{builder}         }
 
 sub _create_args {
     $_[0]->{_create_args} = $_[1] if @_ > 1;
@@ -64,8 +63,7 @@ sub generate_accessor {
 
     my $name          = $attribute->name;
     my $default       = $attribute->default;
-    my $type          = $attribute->type_constraint;
-    my $constraint    = $attribute->find_type_constraint;
+    my $constraint    = $attribute->type_constraint;
     my $builder       = $attribute->builder;
     my $trigger       = $attribute->trigger;
     my $is_weak       = $attribute->is_weak_ref;
@@ -75,22 +73,33 @@ sub generate_accessor {
     my $self  = '$_[0]';
     my $key   = $attribute->inlined_name;
 
-    my $accessor = "sub {\n";
+    my $accessor = 
+        '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+        "sub {\n";
     if ($attribute->_is_metadata eq 'rw') {
-        $accessor .= 'if (scalar(@_) >= 2) {' . "\n";
+        $accessor .= 
+            '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+            'if (@_ >= 2) {' . "\n";
 
         my $value = '$_[1]';
 
         if ($constraint) {
+            $accessor .= 'my $val = ';
             if ($should_coerce) {
-                $accessor .= $value.' = $attribute->coerce_constraint('.$value.');';
+                $accessor .=
+                    "\n".
+                    '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                    'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');';
+            } else {
+                $accessor .= $value.';';
             }
-            $accessor .= 'local $_ = '.$value.';';
-            $accessor .= '
-                unless ($constraint->()) {
-                    my $display = defined($_) ? overload::StrVal($_) : "undef";
-                    Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
-            }' . "\n"
+            $accessor .= 
+                "\n".
+                '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" .
+                'unless ($constraint->check($val)) {
+                    $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint});
+                }' . "\n";
+            $value = '$val';
         }
 
         # if there's nothing left to do for the attribute we can return during
@@ -100,11 +109,11 @@ sub generate_accessor {
         $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n";
 
         if ($is_weak) {
-            $accessor .= 'weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
+            $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n";
         }
 
         if ($trigger) {
-            $accessor .= '$trigger->('.$self.', '.$value.', $attribute);' . "\n";
+            $accessor .= '$trigger->('.$self.', '.$value.');' . "\n";
         }
 
         $accessor .= "}\n";
@@ -125,7 +134,8 @@ sub generate_accessor {
     }
 
     if ($should_deref) {
-        if ($attribute->type_constraint eq 'ArrayRef') {
+        my $type_constraint = $attribute->{type_constraint};
+        if (ref($type_constraint) && $type_constraint->name eq 'ArrayRef') {
             $accessor .= 'if (wantarray) {
                 return @{ '.$self.'->{'.$key.'} || [] };
             }';
@@ -179,7 +189,7 @@ sub generate_handles {
 
         my $method = 'sub {
             my $self = shift;
-            $self->$reader->$remote_method(@_)
+            $self->'.$reader.'->'.$remote_method.'(@_)
         }';
 
         $method_map{$local_method} = eval $method;
@@ -201,10 +211,19 @@ sub create {
     $args{should_coerce} = delete $args{coerce}
         if exists $args{coerce};
 
-    $args{type_constraint} = delete $args{isa}
-        if exists $args{isa};
+    if (exists $args{isa}) {
+        confess "Got isa => $args{isa}, but Mouse does not yet support parameterized types for containers other than ArrayRef and HashRef (rt.cpan.org #39795)"
+            if $args{isa} =~ /^([^\[]+)\[.+\]$/ &&
+               $1 ne 'ArrayRef' &&
+               $1 ne 'HashRef'  &&
+               $1 ne 'Maybe'
+        ;
+
+        my $type_constraint = delete $args{isa};
+        $args{type_constraint}= Mouse::Util::TypeConstraints::find_or_create_isa_type_constraint($type_constraint);
+    }
 
-    my $attribute = $self->new(%args);
+    my $attribute = $self->new($name, %args);
 
     $attribute->_create_args(\%args);
 
@@ -295,38 +314,27 @@ sub validate_args {
     return 1;
 }
 
-sub find_type_constraint {
-    my $self = shift;
-    my $type = $self->type_constraint;
+sub verify_against_type_constraint {
+    return 1 unless $_[0]->{type_constraint};
 
-    return unless $type;
-
-    my $checker = Mouse::TypeRegistry->optimized_constraints($self->associated_class->name)->{$type};
-    return $checker if $checker;
-
-    return sub { blessed($_) && blessed($_) eq $type };
-}
+    local $_ = $_[1];
+    return 1 if $_[0]->{type_constraint}->check($_);
 
-sub verify_type_constraint {
     my $self = shift;
-    local $_ = shift;
-
-    my $type = $self->type_constraint
-        or return 1;
-    my $constraint = $self->find_type_constraint;
-
-    return 1 if $constraint->($_);
+    $self->verify_type_constraint_error($self->name, $_, $self->{type_constraint});
+}
 
-    my $name = $self->name;
-    my $display = defined($_) ? overload::StrVal($_) : 'undef';
+sub verify_type_constraint_error {
+    my($self, $name, $value, $type) = @_;
+    $type = ref($type) eq 'ARRAY' ? join '|', map { $_->name } @{ $type } : $type->name;
+    my $display = defined($value) ? overload::StrVal($value) : 'undef';
     Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
 }
 
-sub coerce_constraint {
-    my($self, $value) = @_;
-    my $type = $self->type_constraint
-        or return $value;
-    return Mouse::TypeRegistry->typecast_constraints($self->associated_class->name, $type, $value);
+sub coerce_constraint { ## my($self, $value) = @_;
+    my $type = $_[0]->{type_constraint}
+        or return $_[1];
+    return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $_[0]->type_constraint, $_[1]);
 }
 
 sub _canonicalize_handles {
@@ -448,12 +456,7 @@ Creates a new code reference for the attribute's clearer.
 
 Creates a new code reference for each of the attribute's handles methods.
 
-=head2 find_type_constraint -> CODE
-
-Returns a code reference which can be used to check that a given value passes
-this attribute's type constraint;
-
-=head2 verify_type_constraint Item -> 1 | ERROR
+=head2 verify_against_type_constraint Item -> 1 | ERROR
 
 Checks that the given value passes this attribute's type constraint. Returns 1
 on success, otherwise C<confess>es.