Class: RubyRunJs::OPCODES::WITH

Inherits:
OP_CODE
  • Object
show all
Defined in:
lib/ruby_run_js/opcodes.rb

Instance Method Summary collapse

Methods inherited from OP_CODE

#to_s

Methods included from RubyRunJs::Operation

#abstract_equality_op, #abstract_inequality_op, #abstract_relational_comparison, #add_op, #binary_operation, #bit_and_op, #bit_bshift_op, #bit_invert_uop, #bit_lshift_op, #bit_or_op, #bit_rshift_op, #bit_xor_op, #div_op, #float, #greater_eq_op, #greater_op, #in_op, #instanceof_op, #less_eq_op, #less_op, #logical_negation_uop, #minus_uop, #mod_op, #mul_op, #plus_uop, #strict_equality_op, #strict_inequality_op, #sub_op, #typeof_uop, #unary_operation, #void_op

Methods included from Helper

#check_object, #get_member, #get_member_dot, #is_accessor_descriptor, #is_callable, #is_data_descriptor, #is_generic_descriptor, #is_primitive, #make_error, #strict_equality

Methods included from ConversionHelper

#convert_to_js_type, #to_boolean, #to_int32, #to_integer, #to_number, #to_object, #to_primitive, #to_string, #to_uint16, #to_uint32

Constructor Details

#initialize(label_start, label_end) ⇒ WITH

Returns a new instance of WITH.



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# File 'lib/ruby_run_js/opcodes.rb', line 829

def initialize(label_start, label_end)
  @label_start = label_start
  @label_end = label_end
end

Instance Method Details

#eval(ctx) ⇒ Object 



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# File 'lib/ruby_run_js/opcodes.rb', line 834

def eval(ctx)
  obj = to_object(ctx.stack.pop(), ctx.builtin)

  scope = ObjectScope.new(obj, ctx, ctx.builtin)

  scope.this_binding = ctx.this_binding
  status = ctx.builtin.executor.run_under_control( \
      scope, @label_start, @label_end)

  ctx.stack.pop()

  type, return_value, label = status
  if type == 0  # normal
    ctx.stack.append(return_value)
    return nil
  elsif type == 1  # return
    ctx.stack.append(return_value)
    return :Return  # send return signal
  elsif type == 2  # jump outside
    ctx.stack.append(return_value)
    return label
  elsif type == 3
      # throw is made with empty stack as usual
    raise return_value
  else
    raise "Unexpected Type: #{type}"
  end
end