Class: CodeTools::AST::Not

Inherits:
Node
  • Object
show all
Defined in:
lib/rubinius/code/ast/operators.rb

Instance Attribute Summary collapse

Attributes inherited from Node

#line

Instance Method Summary collapse

Methods inherited from Node

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

Constructor Details

#initialize(line, value) ⇒ Not

Returns a new instance of Not.



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# File 'lib/rubinius/code/ast/operators.rb', line 57

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

Instance Attribute Details

#value ⇒ Object

Returns the value of attribute value.



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# File 'lib/rubinius/code/ast/operators.rb', line 55

def value
  @value
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/operators.rb', line 62

def bytecode(g)
  true_label = g.new_label
  end_label = g.new_label

  @value.bytecode(g)
  g.goto_if_true true_label

  g.push_true
  g.goto end_label

  true_label.set!
  g.push_false
  end_label.set!
end

#defined(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/operators.rb', line 77

def defined(g)
  t = g.new_label
  f = g.new_label
  done = g.new_label

  case @value
  when GlobalVariableAccess, InstanceVariableAccess
    g.goto t
  else
    @value.value_defined(g, f)
    g.pop
  end

  t.set!
  g.push_literal "expression"
  g.goto done

  f.set!
  g.push_nil

  done.set!
end

#to_sexp ⇒ Object 



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# File 'lib/rubinius/code/ast/operators.rb', line 100

def to_sexp
  [:not, @value.to_sexp]
end