Class: Rubinius::AST::PatternArguments

Inherits:
Node
  • Object
show all
Defined in:
lib/compiler/ast/definitions.rb

Instance Attribute Summary collapse

Attributes inherited from Node

#line

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Node

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

Constructor Details

#initialize(line, arguments) ⇒ PatternArguments

Returns a new instance of PatternArguments.



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# File 'lib/compiler/ast/definitions.rb', line 380

def initialize(line, arguments)
  @line = line
  @arguments = arguments
  @argument = nil
end

Instance Attribute Details

#argument ⇒ Object

Returns the value of attribute argument.



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# File 'lib/compiler/ast/definitions.rb', line 364

def argument
  @argument
end

#arguments ⇒ Object

Returns the value of attribute arguments.



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# File 'lib/compiler/ast/definitions.rb', line 364

def arguments
  @arguments
end

Class Method Details

.from_masgn(node) ⇒ Object 



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# File 'lib/compiler/ast/definitions.rb', line 366

def self.from_masgn(node)
  array = []
  node.left.body.map do |n|
    case n
    when MultipleAssignment
      array << PatternArguments.from_masgn(n)
    when LocalVariable
      array << PatternVariable.new(n.line, n.name)
    end
  end

  PatternArguments.new node.line, ArrayLiteral.new(node.line, array)
end

Instance Method Details

#map_arguments(scope) ⇒ Object

Assign the left-most, depth-first PatternVariable so that this local will be assigned the passed argument at that position. The rest of the pattern will be destructured from the value of this assignment.



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# File 'lib/compiler/ast/definitions.rb', line 389

def map_arguments(scope)
  arguments = @arguments.body
  while arguments
    node = arguments.first
    if node.kind_of? PatternVariable
      @argument = node
      scope.assign_local_reference node
      return
    end
    arguments = node.arguments.body
  end
end