Class: Minjs::ECMA262::ExpAdd

Inherits:
ExpArg2 show all
Includes:
BinaryOperation
Defined in:
lib/minjs/ecma262/exp.rb

Overview

11.6.1 The Addition operator ( + )

Instance Attribute Summary

Attributes inherited from ExpArg2

#val, #val2

Instance Method Summary collapse

Methods included from BinaryOperation

#==, #add_paren, #remove_paren

Methods inherited from ExpArg2

#deep_dup, #initialize, #replace, #to_js, #traverse

Methods inherited from Exp

#to_js, #traverse

Methods inherited from Base

#==, #concat, #deep_dup, #replace, #to_js, #to_s

Constructor Details

This class inherits a constructor from Minjs::ECMA262::ExpArg2

Instance Method Details

#priority ⇒ Object 



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# File 'lib/minjs/ecma262/exp.rb', line 807

def priority
  PRIORITY_ADDITIVE
end

#reduce(parent) ⇒ Object 



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# File 'lib/minjs/ecma262/exp.rb', line 817

def reduce(parent)
  # a + 0 => a
  if @val.kind_of? ECMA262Numeric and @val2.kind_of? ECMA262Numeric and @val.to_num == 0
    parent.replace(self, @val2)
  end
  # 0 + b => b
  if @val.kind_of? ECMA262Numeric and @val2.kind_of? ECMA262Numeric and @val2.to_num == 0
    parent.replace(self, @val)
  end
  # N + M => (N + M)
  if @val.kind_of? ECMA262Numeric and @val2.kind_of? ECMA262Numeric and @val.integer? and @val2.integer?
    parent.replace(self, ECMA262Numeric.new(@val.to_num + @val2.to_num))
  end
end

#swap ⇒ Object 



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# File 'lib/minjs/ecma262/exp.rb', line 811

def swap
  t = @val
  @val = @val2
  @val2 = t
end

#sym ⇒ Object 



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# File 'lib/minjs/ecma262/exp.rb', line 803

def sym
  "+"
end