Class: Opal::Nodes::ZsuperNode

Inherits:
SuperNode show all
Defined in:
opal/lib/opal/nodes/super.rb

Overview

super with implicit args

Constant Summary

Constants inherited from CallNode

CallNode::OPERATORS, CallNode::SPECIALS

Instance Attribute Summary

Attributes inherited from CallNode

#arglist, #iter, #meth, #recvr

Attributes inherited from Base

#compiler, #sexp, #type

Attributes included from Closure::NodeSupport

#closure

Instance Method Summary collapse

Methods inherited from BaseSuperNode

#compile_using_send

Methods inherited from CallNode

add_special

Methods inherited from Base

#add_gvar, #add_ivar, #add_local, #add_temp, children, #children, #class_variable_owner, #class_variable_owner_nesting_level, #comments, #compile_to_fragments, #error, #expr, #expr?, #expr_or_empty, #expr_or_nil, #fragment, handle, handlers, #has_rescue_else?, #helper, #in_ensure, #in_ensure?, #in_resbody, #in_resbody?, #in_rescue, #in_while?, #process, #push, #recv, #recv?, #s, #scope, #source_location, #stmt, #stmt?, #top_scope, truthy_optimize?, #unshift, #while_loop, #with_temp, #wrap

Methods included from Closure::NodeSupport

#closure_is?, #compile_catcher, #generate_thrower, #generate_thrower_without_catcher, #in_closure, #pop_closure, #push_closure, #select_closure, #thrower

Methods included from Helpers

#current_indent, #empty_line, #indent, #js_truthy, #js_truthy_optimize, #line, #mid_to_jsid, #property, #valid_name?

Constructor Details

#initialize ⇒ ZsuperNode

Returns a new instance of ZsuperNode.



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# File 'opal/lib/opal/nodes/super.rb', line 148

def initialize(*)
  super

  # preserve a block if we have one already but otherwise, assume a block is coming from higher
  # up the chain
  unless iter.type == :iter
    # Need to support passing block up even if it's not referenced in this method at all
    scope.uses_block!
    @iter = s(:js_tmp, scope.block_name || '$yield')
  end
end

Instance Method Details

#block_name ⇒ Object 



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# File 'opal/lib/opal/nodes/super.rb', line 212

def block_name
  case def_scope
  when Opal::Nodes::IterNode
    def_scope.block_name
  when Opal::Nodes::DefNode
    def_scope.block_name
  else
    raise "Don't know what to do with super in the scope #{def_scope}"
  end
end

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/super.rb', line 160

def compile
  if def_scope
    implicit_args = implicit_arglist
    # If the method we're in has a block and we're using a default super call with no args, we need to grab the block
    # If an iter (block via braces) is provided, that takes precedence
    if block_name && !iter
      block_pass = s(:block_pass, s(:lvar, block_name))
      implicit_args << block_pass
    end

    @arglist = s(:arglist, *implicit_args)
  end

  compile_using_send
end

#implicit_arglist ⇒ Object 



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# File 'opal/lib/opal/nodes/super.rb', line 176

def implicit_arglist
  args = []
  kwargs = []
  same_arg_counter = Hash.new(0)

  def_scope.original_args.children.each do |sexp|
    lvar_name = sexp.children[0]

    case sexp.type
    when :arg, :optarg
      arg_node = s(:lvar, lvar_name)
      #   def m(_, _)
      # is compiled to
      #   function $$m(_, __$2)
      # See Opal::Node::ArgsNode
      if lvar_name[0] == '_'
        same_arg_counter[lvar_name] += 1
        arg_node = s(:js_tmp, "#{lvar_name}_$#{same_arg_counter[lvar_name]}") if same_arg_counter[lvar_name] > 1
      end
      args << arg_node
    when :restarg
      arg_node = lvar_name ? s(:lvar, lvar_name) : s(:js_tmp, '$rest_arg')
      args << s(:splat, arg_node)
    when :kwarg, :kwoptarg
      key_name = sexp.meta[:arg_name]
      kwargs << s(:pair, s(:sym, key_name), s(:lvar, lvar_name))
    when :kwrestarg
      arg_node = lvar_name ? s(:lvar, lvar_name) : s(:js_tmp, '$kw_rest_arg')
      kwargs << s(:kwsplat, arg_node)
    end
  end

  args << s(:hash, *kwargs) unless kwargs.empty?
  args
end

#implicit_arguments_param ⇒ Object 



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# File 'opal/lib/opal/nodes/super.rb', line 144

def implicit_arguments_param
  'true'
end