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Module: RBS::Prototype::Helpers

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Included In:
NodeUsage, RB, Runtime
Defined in: lib/rbs/prototype/helpers.rb

Instance Method Summary

Instance Method Details

#any_node?(node, nodes: [], &block) ⇒ Boolean (private)

[ GitHub ] 

  


# File 'lib/rbs/prototype/helpers.rb', line 97



def any_node?(node, nodes: [], &block)
  if yield(node)
    nodes << node
  end

  each_child node do |child|
    any_node? child, nodes: nodes, &block
  end

  nodes.empty? ? nil : nodes
end


  








  

    #args_from_node(args_node)   (private)
  



  

    

NOTE: args_node may be a nil by a bug bugs.ruby-lang.org/issues/17495


  



  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 121



def args_from_node(args_node)
  args_node&.children || [0, nil, nil, nil, 0, nil, nil, nil, nil, nil]
end


  








  

    #block_from_body(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 8



def block_from_body(node)
  _, args_node, body_node = node.children
  _pre_num, _pre_init, _opt, _first_post, _post_num, _post_init, _rest, _kw, _kwrest, block_var = args_from_node(args_node)

  # @type var body_node: node?
  if body_node
    yields = any_node?(body_node) {|n| n.type == :YIELD }
  end

  if yields || block_var
    required = true

    if body_node
      if any_node?(body_node) {|n| n.type == :FCALL && n.children[0] == :block_given? && !n.children[1] }
        required = false
      end
    end

    if _rest == :* && block_var == :&
      # ... is given
      required = false
    end

    if block_var
      if body_node
        usage = NodeUsage.new(body_node)
        if usage.each_conditional_node.any? {|n| n.type == :LVAR && n.children[0] == block_var }
          required = false
        end
      end
    end

    method_block = Types::Block.new(
      required: required,
      type: Types::Function.empty(untyped),
      self_type: nil
    )

    if yields
      yields.each do |yield_node|
        array_content = yield_node.children[0]&.children&.compact || []

        # @type var keywords: node?
        positionals, keywords = if keyword_hash?(array_content.last)
                                  [array_content.take(array_content.size - 1), array_content.last]
                                else
                                  [array_content, nil]
                                end

        if (diff = positionals.size - method_block.type.required_positionals.size) > 0
          diff.times do
            method_block.type.required_positionals << Types::Function::Param.new(
              type: untyped,
              name: nil
            )
          end
        end

        if keywords
          keywords.children[0].children.each_slice(2) do |key_node, value_node|
            if key_node
              key = key_node.children[0]
              method_block.type.required_keywords[key] ||=
                Types::Function::Param.new(
                  type: untyped,
                  name: nil
                )
            end
          end
        end
      end
    end
  end

  method_block
end


  








  

    #each_child(node, &block)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 85



def each_child(node, &block)
  each_node node.children, &block
end


  








  

    #each_node(nodes)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 89



def each_node(nodes)
  nodes.each do |child|
    if child.is_a?(RubyVM::AbstractSyntaxTree::Node)
      yield child
    end
  end
end


  








  

    #keyword_hash?(node)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 109



def keyword_hash?(node)
  if node && node.type == :HASH
    node.children[0].children.compact.each_slice(2).all? {|key, _|
      key.type == :LIT && key.children[0].is_a?(Symbol)
    }
  else
    false
  end
end


  








  

    #untyped   (private)
  

  [ GitHub ]


  

  


# File 'lib/rbs/prototype/helpers.rb', line 125



def untyped
  @untyped ||= Types::Bases::Any.new(location: nil)
end