Class: Rubinius::ToolSet.current::TS::AST::FormalArguments19

Inherits:
FormalArguments show all
Defined in:
lib/rubinius/ast/definitions.rb

Instance Attribute Summary collapse

Attributes inherited from FormalArguments

#block_arg, #block_index, #defaults, #names, #optional, #required, #splat

Attributes inherited from Node

#line

Instance Method Summary collapse

Methods inherited from FormalArguments

#to_actual, #to_sexp

Methods inherited from Node

#ascii_graph, #attributes, #children, #defined, match_arguments?, match_send?, #new_block_generator, #new_generator, #node_name, #or_bytecode, #pos, #set_child, #to_sexp, #transform, transform, transform_comment, transform_kind, transform_kind=, transform_name, #value_defined, #visit, #walk

Constructor Details

#initialize(line, required, optional, splat, post, block) ⇒ FormalArguments19

Returns a new instance of FormalArguments19.



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# File 'lib/rubinius/ast/definitions.rb', line 400

def initialize(line, required, optional, splat, post, block)
  @line = line
  @defaults = nil
  @block_arg = nil
  @splat_index = nil
  @block_index = nil

  @required = []
  names = []

  if required
    required.each do |arg|
      case arg
      when Symbol
        names << arg
        @required << arg
      when MultipleAssignment
        @required << PatternArguments.from_masgn(arg)
        @splat_index = -4 if @required.size == 1
      end
    end
  end

  if optional
    @defaults = DefaultArguments.new line, optional
    @optional = @defaults.names
    names.concat @optional
  else
    @optional = []
  end

  case splat
  when Symbol
    names << splat
  when true
    splat = :*
    names << splat
  when false
    @splat_index = -3
    splat = nil
  end

  @post = []
  if post
    post.each do |arg|
      case arg
      when MultipleAssignment
        @post << PatternArguments.from_masgn(arg)
      when Symbol
        @post << arg
        names << arg
      end
    end
  end

  if block
    @block_arg = BlockArgument.new line, block
    names << block
    @block_index = names.length - 1
  end

  @splat = splat
  @names = names
end

Instance Attribute Details

#post ⇒ Object

Returns the value of attribute post.



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# File 'lib/rubinius/ast/definitions.rb', line 398

def post
  @post
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 516

def bytecode(g)
  g.state.check_for_locals = false
  map_arguments g.state.scope

  @required.each do |arg|
    if arg.kind_of? PatternArguments
      arg.argument.position_bytecode(g)
      arg.bytecode(g)
      g.pop
    end
  end
  @defaults.bytecode(g) if @defaults
  @block_arg.bytecode(g) if @block_arg
  @post.each do |arg|
    if arg.kind_of? PatternArguments
      arg.argument.position_bytecode(g)
      arg.bytecode(g)
      g.pop
    end
  end
  g.state.check_for_locals = true
end

#map_arguments(scope) ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 489

def map_arguments(scope)
  @required.each_with_index do |arg, index|
    case arg
    when PatternArguments
      arg.map_arguments scope
    when Symbol
      @required[index] = arg = :"_#{index}" if arg == :_ and index > 0
      scope.new_local arg
    end
  end

  @defaults.map_arguments scope if @defaults
  scope.new_local @splat if @splat.kind_of? Symbol

  @post.each do |arg|
    case arg
    when PatternArguments
      arg.map_arguments scope
    when Symbol
      scope.new_local arg
    end
  end

  scope.assign_local_reference @block_arg if @block_arg

end

#post_args ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 469

def post_args
  @post.size
end

#required_args ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 465

def required_args
  @required.size + @post.size
end

#splat_index ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 477

def splat_index
  return @splat_index if @splat_index

  if @splat
    index = @names.size
    index -= 1 if @block_arg
    index -= 1 if @splat.kind_of? Symbol
    index -= @post.size
    index
  end
end

#total_args ⇒ Object 



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# File 'lib/rubinius/ast/definitions.rb', line 473

def total_args
  @required.size + @optional.size + @post.size
end