Sha256: dc096b06b5fa3630f09a5617b547bd7291a196e7c392ae60608255fcdc3ae2d9
Contents?: true
Size: 884 Bytes
Versions: 14
Compression:
Stored size: 884 Bytes
Contents
class AttrExtras::AttrValue
def initialize(klass, *names)
@klass, @names = klass, names
end
attr_reader :klass, :names
private :klass, :names
def apply
define_readers
define_equals
define_hash_identity
end
private
def define_readers
klass.send(:attr_reader, *names)
end
def define_equals
names = @names # Make available within block.
klass.send(:define_method, :==) do |other|
return false unless other.is_a?(self.class)
names.all? { |attr| self.public_send(attr) == other.public_send(attr) }
end
end
def define_hash_identity
names = @names # Make available within block.
# Both #eql? and #hash are required for hash identity.
klass.send(:alias_method, :eql?, :==)
klass.send(:define_method, :hash) do
[ self.class, *names.map { |attr| public_send(attr) } ].hash
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems