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=581c4ce5c0825befe0b0e7544d9ef00e0ca84fdf;hp=ba46cbd4dc3f91d2b8607cfcca56013b4e425197;hb=9b9e4b6566015d6d6e2aa6c745644174efa74623;hpb=1ae8a0d7aaaa0627218d5026a013fb70113cce5a diff --git a/lib/Mouse/Meta/Method/Accessor.pm b/lib/Mouse/Meta/Method/Accessor.pm old mode 100644 new mode 100755 index ba46cbd..581c4ce --- a/lib/Mouse/Meta/Method/Accessor.pm +++ b/lib/Mouse/Meta/Method/Accessor.pm @@ -1,11 +1,9 @@ package Mouse::Meta::Method::Accessor; -use strict; -use warnings; -use Carp (); +use Mouse::Util; # enables strict and warnings +use Scalar::Util qw(blessed); -# internal use only. do not call directly -sub generate_accessor_method_inline { - my ($class, $attribute) = @_; +sub _generate_accessor{ + my (undef, $attribute, $class, $type) = @_; my $name = $attribute->name; my $default = $attribute->default; @@ -14,59 +12,53 @@ sub generate_accessor_method_inline { 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 = $attribute->inlined_name; + my $key = "q{$name}"; + my $slot = "$self\->{$key}"; - my $accessor = - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - "sub {\n"; - if ($attribute->_is_metadata eq 'rw') { - $accessor .= - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'if (@_ >= 2) {' . "\n"; + $type ||= 'accessor'; + my $accessor = sprintf(qq{#line 1 "%s for %s (%s)"\n}, $type, $name, __FILE__) + . "sub {\n"; + + if ($type eq 'accessor' || $type eq 'writer') { + if($type eq 'accessor'){ + $accessor .= + 'if (scalar(@_) >= 2) {' . "\n"; + } + else{ # writer + $accessor .= + 'if(@_ < 2){ Carp::confess("Not enough arguments for the writer of '.$name.'") }'. + '{' . "\n"; + } + my $value = '$_[1]'; - if ($constraint) { - $accessor .= 'my $val = '; + if (defined $constraint) { if ($should_coerce) { $accessor .= "\n". - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'Mouse::Util::TypeConstraints->typecast_constraints("'.$attribute->associated_class->name.'", $attribute->{type_constraint}, '.$value.');'; - } else { - $accessor .= $value.';'; - } - if ($compiled_type_constraint) { - $accessor .= - "\n". - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'unless ($compiled_type_constraint->($val)) { - $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint}); - }' . "\n"; - } else { - $accessor .= - "\n". - '#line ' . __LINE__ . ' "' . __FILE__ . "\"\n" . - 'unless ($constraint->check($val)) { - $attribute->verify_type_constraint_error($name, $val, $attribute->{type_constraint}); - }' . "\n"; + 'my $val = $constraint->coerce('.$value.');'; + $value = '$val'; } - $value = '$val'; + $accessor .= + "\n". + '$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) { @@ -75,40 +67,137 @@ sub generate_accessor_method_inline { $accessor .= "}\n"; } - else { + elsif($type eq 'reader') { $accessor .= 'Carp::confess("Cannot assign a value to a read-only accessor") if scalar(@_) >= 2;' . "\n"; } + else{ + $class->throw_error("Unknown accessor type '$type'"); + } if ($attribute->is_lazy) { - $accessor .= $self.'->{'.$key.'} = '; - - $accessor .= $attribute->has_builder - ? $self.'->$builder' - : ref($default) eq 'CODE' - ? '$default->('.$self.')' - : '$default'; - $accessor .= ' if !exists '.$self.'->{'.$key.'};' . "\n"; + my $value; + + if (defined $builder){ + $value = "$self->\$builder()"; + } + elsif (ref($default) eq 'CODE'){ + $value = "$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"; + #XXX: The following 'defined and' check is for backward compatibility + $accessor .= "defined(\$tmp) and "; + + $accessor .= "\$compiled_type_constraint->(\$tmp)"; + $accessor .= " || \$attribute->verify_type_constraint_error(\$name, \$tmp, \$constraint);\n"; + $accessor .= "$slot = \$tmp;\n"; + } + else{ + $accessor .= "$slot = $value;\n"; + } + $accessor .= "}\n"; } if ($should_deref) { - if (ref($constraint) && $constraint->name eq 'ArrayRef') { - $accessor .= 'if (wantarray) { - return @{ '.$self.'->{'.$key.'} || [] }; - }'; + if ($constraint->is_a_type_of('ArrayRef')) { + $accessor .= "return \@{ $slot || [] } if wantarray;\n"; } - else { - $accessor .= 'if (wantarray) { - return %{ '.$self.'->{'.$key.'} || {} }; - }'; + elsif($constraint->is_a_type_of('HashRef')){ + $accessor .= "return \%{ $slot || {} } if wantarray;\n"; + } + else{ + $class->throw_error("Can not auto de-reference the type constraint " . $constraint->name); } } - $accessor .= 'return '.$self.'->{'.$key.'}; - }'; + $accessor .= "return $slot;\n}\n"; + + #print "# class ", $class->name, "\n", $accessor, "\n"; + my $code; + my $e = do{ + local $@; + $code = eval $accessor; + $@; + }; + die $e if $e; - my $sub = eval $accessor; - Carp::confess($@) if $@; - return $sub; + return $code; } +sub _generate_reader{ + my $class = shift; + return $class->_generate_accessor(@_, 'reader'); +} + +sub _generate_writer{ + my $class = shift; + return $class->_generate_accessor(@_, 'writer'); +} + + +sub _generate_predicate { + my (undef, $attribute, $class) = @_; + + my $slot = $attribute->name; + return sub{ + return exists $_[0]->{$slot}; + }; +} + +sub _generate_clearer { + my (undef, $attribute, $class) = @_; + + my $slot = $attribute->name; + + return sub{ + delete $_[0]->{$slot}; + }; +} + +sub _generate_delegation{ + my (undef, $attribute, $class, $reader, $handle_name, $method_to_call) = @_; + + return sub { + my $instance = shift; + my $proxy = $instance->$reader(); + + 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(@_); + }; +} + + 1; +__END__ + +=head1 NAME + +Mouse::Meta::Method::Accessor - A Mouse method generator for accessors + +=head1 VERSION + +This document describes Mouse version 0.39 + +=head1 SEE ALSO + +L + +=cut