class Minjs::ECMA262::ExpSub

Class of the Subtraction operator expression element.

@see www.ecma-international.org/ecma-262 ECMA262 11.6

Public Class Methods

new(val, val2) click to toggle source
# File lib/minjs/ecma262/expression.rb, line 1295
def initialize(val, val2)
  @val = val
  @val2 = val2
end

Public Instance Methods

ecma262_typeof() click to toggle source

return results of ‘typeof’ operator.

@return [Symbol] :number

# File lib/minjs/ecma262/expression.rb, line 1326
def ecma262_typeof
  :number
end
priority() click to toggle source

@return [Fixnum] expression priority

# File lib/minjs/ecma262/expression.rb, line 1306
def priority
  PRIORITY_ADDITIVE
end
reduce(parent) click to toggle source

reduce expression if available @param parent [Base] parent element

# File lib/minjs/ecma262/expression.rb, line 1312
def reduce(parent)
  # A - B
  if @val.respond_to? :to_ecma262_number and @val2.respond_to? :to_ecma262_number
    v = @val.to_ecma262_number
    v2 = @val2.to_ecma262_number
    if !v.nil? and !v2.nil?
      parent.replace(self, ECMA262Numeric.new(v - v2))
    end
  end
end
sym() click to toggle source

symbol of expression

# File lib/minjs/ecma262/expression.rb, line 1301
def sym
  "-"
end