Class: CodeTools::AST::Next

Inherits:
Break show all
Defined in:
lib/rubinius/ast/control_flow.rb

Instance Attribute Summary

Attributes inherited from Break

#value

Attributes inherited from Node

#line

Instance Method Summary collapse

Methods inherited from Break

#block=, #defined, #jump_error, #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, value) ⇒ Next

Returns a new instance of Next.



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# File 'lib/rubinius/ast/control_flow.rb', line 589

def initialize(line, value)
  @line = line
  @value = value
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/ast/control_flow.rb', line 594

def bytecode(g)
  pos(g)

  g.pop if g.state.top_level_ensure?

  # From "The Ruby Programming Lanuage"
  #  "When next is used in a loop, any values following the next
  #   are ignored"
  #
  # By ignored, it must mean evaluated and the value of the expression
  # is thrown away, because 1.8 evaluates them even though it doesn't
  # use them.
  if @value
    @value.bytecode(g)
  else
    g.push :nil
  end

  if g.state.loop?
    g.goto g.next
  elsif g.state.block?
    if g.next
      g.goto g.next
    else
      g.ret
    end
  else
    g.pop

    jump_error g, :next
  end

  g.push_nil if g.state.top_level_ensure?
end

#sexp_name ⇒ Object 



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# File 'lib/rubinius/ast/control_flow.rb', line 629

def sexp_name
  :next
end