class RBS::AncestorGraph

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 13
def initialize(env:, ancestor_builder: DefinitionBuilder::AncestorBuilder.new(env: env))
  @env = env
  @ancestor_builder = ancestor_builder
  build()
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 19
def build()
  @parents = {}
  @children = {}

  env.class_decls.each_key do |type_name|
    build_ancestors(InstanceNode.new(type_name: type_name), ancestor_builder.one_instance_ancestors(type_name))
    build_ancestors(SingletonNode.new(type_name: type_name), ancestor_builder.one_singleton_ancestors(type_name))
  end
  env.interface_decls.each_key do |type_name|
    build_ancestors(InstanceNode.new(type_name: type_name), ancestor_builder.one_interface_ancestors(type_name))
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 32
def build_ancestors(node, ancestors)
  ancestors.each_ancestor do |ancestor|
    case ancestor
    when Definition::Ancestor::Instance
      register(child: node, parent: InstanceNode.new(type_name: ancestor.name))
    when Definition::Ancestor::Singleton
      register(child: node, parent: SingletonNode.new(type_name: ancestor.name))
    end
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 64
def each_ancestor(node, yielded: Set[], &block)
  if block
    each_parent(node) do |parent|
      unless yielded.member?(parent)
        yielded << parent
        yield parent
        each_ancestor(parent, yielded: yielded, &block)
      end
    end
  else
    enum_for :each_ancestor, node
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 56
def each_child(node, &block)
  if block
    children[node]&.each(&block)
  else
    enum_for :each_child, node
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 78
def each_descendant(node, yielded: Set[], &block)
  if block
    each_child(node) do |child|
      unless yielded.member?(child)
        yielded << child
        yield child
        each_descendant(child, yielded: yielded, &block)
      end
    end
  else
    enum_for :each_descendant, node
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 48
def each_parent(node, &block)
  if block
    parents[node]&.each(&block)
  else
    enum_for :each_parent, node
  end
end

# File rbs-3.2.1/lib/rbs/ancestor_graph.rb, line 43
def register(parent:, child:)
  (parents[child] ||= Set[]) << parent
  (children[parent] ||= Set[]) << child
end