Class: CodeTools::AST::ToplevelConstant

Inherits:
Node
  • Object
show all
Defined in:
lib/rubinius/code/ast/constants.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, #visit, #walk

Constructor Details

#initialize(line, name) ⇒ ToplevelConstant

Returns a new instance of ToplevelConstant.



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# File 'lib/rubinius/code/ast/constants.rb', line 119

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

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/rubinius/code/ast/constants.rb', line 117

def name
  @name
end

Instance Method Details

#assign_bytecode(g, value) ⇒ Object 



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# File 'lib/rubinius/code/ast/constants.rb', line 131

def assign_bytecode(g, value)
  pos(g)

  g.push_cpath_top
  g.push_literal @name
  value.bytecode(g)
end

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/constants.rb', line 124

def bytecode(g)
  pos(g)

  g.push_cpath_top
  g.find_const @name
end

#defined(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/constants.rb', line 147

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

  value_defined(g, f)

  g.pop
  g.push_literal "constant"
  g.goto done

  f.set!
  g.push_nil

  done.set!
end

#masgn_bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/constants.rb', line 139

def masgn_bytecode(g)
  pos(g)

  g.push_cpath_top
  g.swap
  g.push_literal @name
end

#to_sexp ⇒ Object Also known as: assign_sexp 



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# File 'lib/rubinius/code/ast/constants.rb', line 191

def to_sexp
  [:colon3, @name]
end

#value_defined(g, f) ⇒ Object 



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# File 'lib/rubinius/code/ast/constants.rb', line 163

def value_defined(g, f)
  # Save the current exception into a stack local
  g.push_exception_state
  outer_exc_state = g.new_stack_local
  g.set_stack_local outer_exc_state
  g.pop

  ex = g.new_label
  ok = g.new_label
  g.setup_unwind ex, RescueType

  g.push_cpath_top
  g.push_literal @name
  g.push_false
  g.invoke_primitive :vm_const_defined_under, 3

  g.pop_unwind
  g.goto ok

  ex.set!
  g.clear_exception
  g.push_stack_local outer_exc_state
  g.restore_exception_state
  g.goto f

  ok.set!
end