X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FMethod%2FAccessor.pm;h=68d51e33f64145745a443d6d40dde677f2546da9;hp=eb9152dcf2f5ba086d33a6d7a87c393793d06f22;hb=8aba926dbf11e9cf418c7c79b925d15e60e1e990;hpb=14d7595ac866dd1bffc2d12a6b4bdaf673393ce6 diff --git a/lib/Mouse/Meta/Method/Accessor.pm b/lib/Mouse/Meta/Method/Accessor.pm index eb9152d..68d51e3 100755 --- a/lib/Mouse/Meta/Method/Accessor.pm +++ b/lib/Mouse/Meta/Method/Accessor.pm @@ -1,10 +1,13 @@ package Mouse::Meta::Method::Accessor; -use strict; -use warnings; -use Scalar::Util qw(blessed); +use Mouse::Util; # enables strict and warnings -sub _install_accessor{ - my (undef, $attribute, $method_name, $class, $type) = @_; +sub _inline_slot{ + my(undef, $self_var, $attr_name) = @_; + return sprintf '%s->{q{%s}}', $self_var, $attr_name; +} + +sub _generate_accessor{ + my ($method_class, $attribute, $class, $type) = @_; my $name = $attribute->name; my $default = $attribute->default; @@ -13,60 +16,52 @@ sub _install_accessor{ my $trigger = $attribute->trigger; my $is_weak = $attribute->is_weak_ref; my $should_deref = $attribute->should_auto_deref; - my $should_coerce = $attribute->should_coerce; + my $should_coerce = (defined($constraint) && $constraint->has_coercion && $attribute->should_coerce); - my $compiled_type_constraint = $constraint ? $constraint->_compiled_type_constraint : undef; + my $compiled_type_constraint = defined($constraint) ? $constraint->_compiled_type_constraint : undef; my $self = '$_[0]'; - my $key = sprintf q{"%s"}, quotemeta $name; + my $slot = $method_class->_inline_slot($self, $name);; $type ||= 'accessor'; - my $accessor = - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - "sub {\n"; + my $accessor = sprintf(qq{package %s;\n#line 1 "%s for %s (%s)"\n}, $class->name, $type, $name, __FILE__) + . "sub {\n"; + if ($type eq 'accessor' || $type eq 'writer') { if($type eq 'accessor'){ $accessor .= - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . 'if (scalar(@_) >= 2) {' . "\n"; } else{ # writer $accessor .= - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'if(@_ < 2){ Carp::confess("Not enough arguments for writer '.$method_name.'") }'. + 'if(@_ < 2){ Carp::confess("Not enough arguments for the writer of '.$name.'") }'. '{' . "\n"; } my $value = '$_[1]'; if (defined $constraint) { - if(!$compiled_type_constraint){ - Carp::confess("[BUG] Missing compiled type constraint for $constraint"); - } if ($should_coerce) { $accessor .= "\n". - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . 'my $val = $constraint->coerce('.$value.');'; $value = '$val'; } $accessor .= "\n". - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'unless ($compiled_type_constraint->('.$value.')) { - $attribute->verify_type_constraint_error($name, '.$value.', $attribute->{type_constraint}); - }' . "\n"; + '$compiled_type_constraint->('.$value.') or + $attribute->verify_type_constraint_error($name, '.$value.', $constraint);' . "\n"; } # if there's nothing left to do for the attribute we can return during # this setter $accessor .= 'return ' if !$is_weak && !$trigger && !$should_deref; - $accessor .= $self.'->{'.$key.'} = '.$value.';' . "\n"; + $accessor .= "$slot = $value;\n"; if ($is_weak) { - $accessor .= 'Scalar::Util::weaken('.$self.'->{'.$key.'}) if ref('.$self.'->{'.$key.'});' . "\n"; + $accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n"; } if ($trigger) { @@ -83,114 +78,107 @@ sub _install_accessor{ } if ($attribute->is_lazy) { - $accessor .= $self.'->{'.$key.'} = '; + my $value; - if($should_coerce && defined($constraint)){ - $accessor .= '$attribute->_coerce_and_verify('; + if (defined $builder){ + $value = "$self->\$builder()"; + } + elsif (ref($default) eq 'CODE'){ + $value = "$self->\$default()"; } - $accessor .= $attribute->has_builder ? $self.'->$builder' - : ref($default) eq 'CODE' ? '$default->('.$self.')' - : '$default'; + else{ + $value = '$default'; + } + + $accessor .= "if(!exists $slot){\n"; + if($should_coerce){ + $accessor .= "$slot = \$constraint->coerce($value)"; + } + elsif(defined $constraint){ + $accessor .= "my \$tmp = $value;\n"; - if($should_coerce && defined $constraint){ - $accessor .= ')'; + $accessor .= "\$compiled_type_constraint->(\$tmp)"; + $accessor .= " || \$attribute->verify_type_constraint_error(\$name, \$tmp, \$constraint);\n"; + $accessor .= "$slot = \$tmp;\n"; + } + else{ + $accessor .= "$slot = $value;\n"; } - $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n"; + if ($is_weak) { + $accessor .= "Scalar::Util::weaken($slot) if ref $slot;\n"; + } + $accessor .= "}\n"; } if ($should_deref) { if ($constraint->is_a_type_of('ArrayRef')) { - $accessor .= 'if (wantarray) { - return @{ '.$self.'->{'.$key.'} || [] }; - }'; + $accessor .= "return \@{ $slot || [] } if wantarray;\n"; } elsif($constraint->is_a_type_of('HashRef')){ - $accessor .= 'if (wantarray) { - return %{ '.$self.'->{'.$key.'} || {} }; - }'; + $accessor .= "return \%{ $slot || {} } if wantarray;\n"; } else{ $class->throw_error("Can not auto de-reference the type constraint " . $constraint->name); } } - $accessor .= 'return '.$self.'->{'.$key."};\n}"; + $accessor .= "return $slot;\n}\n"; #print $accessor, "\n"; - my $code = eval $accessor; - $attribute->throw_error($@) if $@; - - $class->add_method($method_name => $code); - return; + my $code; + my $e = do{ + local $@; + $code = eval $accessor; + $@; + }; + die $e if $e; + + return $code; } -sub _install_reader{ +sub _generate_reader{ my $class = shift; - $class->_install_accessor(@_, 'reader'); - return; + return $class->_generate_accessor(@_, 'reader'); } -sub _install_writer{ +sub _generate_writer{ my $class = shift; - $class->_install_accessor(@_, 'writer'); - return; + return $class->_generate_accessor(@_, 'writer'); } -sub _install_predicate { - my (undef, $attribute, $method_name, $class) = @_; +sub _generate_predicate { + my (undef, $attribute, $class) = @_; my $slot = $attribute->name; - - $class->add_method($method_name => sub{ + return sub{ return exists $_[0]->{$slot}; - }); - return; + }; } -sub _install_clearer { - my (undef, $attribute, $method_name, $class) = @_; +sub _generate_clearer { + my (undef, $attribute, $class) = @_; my $slot = $attribute->name; - $class->add_method($method_name => sub{ + return sub{ delete $_[0]->{$slot}; - }); - return; + }; } -sub _install_handles { - my (undef, $attribute, $handles, $class) = @_; +1; +__END__ - my $reader = $attribute->reader || $attribute->accessor - or $class->throw_error("You must pass a reader method for '".$attribute->name."'"); +=head1 NAME - my %handles = $attribute->_canonicalize_handles($handles); +Mouse::Meta::Method::Accessor - A Mouse method generator for accessors - foreach my $handle_name (keys %handles) { - my $method_to_call = $handles{$handle_name}; +=head1 VERSION - my $code = sub { - my $instance = shift; - my $proxy = $instance->$reader(); +This document describes Mouse version 0.40_07 - my $error = !defined($proxy) ? ' is not defined' - : ref($proxy) && !blessed($proxy) ? qq{ is not an object (got '$proxy')} - : undef; - if ($error) { - $instance->meta->throw_error( - "Cannot delegate $handle_name to $method_to_call because " - . "the value of " - . $attribute->name - . $error - ); - } - $proxy->$method_to_call(@_); - }; - $class->add_method($handle_name => $code); - } - return; -} +=head1 SEE ALSO +L -1; +=cut