class RBS::Annotate::Annotations::Copy

def ==(other)
  other.is_a?(Copy) &&
    other.annotation == annotation &&
    other.source == source
end

def hash
  self.class.hash ^ annotation.hash ^ source.hash
end

def initialize(annotation:, source:)
  @annotation = annotation
  @source = source
end

def method_name
  _, m = partition
  if m
    m[1]
  end
end

def partition
  case
  when match = source.match(/(?<constant_name>[^#]+)#(?<method_name>.+)/)
    [
      TypeName.parse(match[:constant_name] || raise),
      [
        false,
        (match[:method_name] or raise).to_sym
      ]
    ]
  when match = source.match(/(?<constant_name>[^#]+)\.(?<method_name>.+)/)
    [
      TypeName.parse(match[:constant_name] || raise),
      [
        true,
        (match[:method_name] or raise).to_sym
      ]
    ]
  else
    [
      TypeName.parse(source),
      nil
    ]
  end
end

def singleton?
  _, m = partition
  if m
    m[0]
  else
    false
  end
end

def type_name
  name, _ = partition
  name
end