Class: Minjs::ECMA262::ExpAdd

Inherits:
Expression show all
Includes:
BinaryOperation
Defined in:
lib/minjs/ecma262/expression.rb

Overview

Class of the Additionr operator expression element.

See Also:

Instance Attribute Summary

Attributes included from BinaryOperation

#val, #val2

Attributes inherited from Base

#parent

Instance Method Summary collapse

Methods included from BinaryOperation

#==, #add_paren, #deep_dup, #remove_paren, #replace, #to_js, #traverse

Methods inherited from Expression

#left_hand_side_exp?, #side_effect?

Methods inherited from Base

#==, #add_remove_paren, #concat, #deep_dup, #replace, #to_js, #traverse

Constructor Details

#initialize(val, val2) ⇒ ExpAdd

Returns a new instance of ExpAdd.



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# File 'lib/minjs/ecma262/expression.rb', line 1244

def initialize(val, val2)
  @val = val
  @val2 = val2
end

Instance Method Details

#priority ⇒ Fixnum

Returns expression priority.

Returns:

  • (Fixnum) —

    expression priority



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# File 'lib/minjs/ecma262/expression.rb', line 1255

def priority
  PRIORITY_ADDITIVE
end

#reduce(parent) ⇒ Object

reduce expression if available

Parameters:

  • parent (Base) —

    parent element



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# File 'lib/minjs/ecma262/expression.rb', line 1261

def reduce(parent)
  #
  # String + String/
  # a + b = a.concat(b)
  if @val.kind_of? ECMA262String or @val2.kind_of? ECMA262String
    if @val.respond_to? :to_ecma262_string and @val2.respond_to? :to_ecma262_string
      v = @val.to_ecma262_string
      v2 = @val2.to_ecma262_string
      if !v.nil? and !v2.nil?
        new_str = ECMA262String.new(v + v2)
        parent.replace(self, new_str)
      end
    end
  #
  # Numeric + Numeric
  #
  elsif @val.respond_to? :to_ecma262_number and @val2.respond_to? :to_ecma262_number
    #
    #11.6.3 Applying the Additive Operators to Numbers(TODO)
    #
    # N + M => (N + M)
    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 ⇒ Object

symbol of expression



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# File 'lib/minjs/ecma262/expression.rb', line 1250

def sym
  "+"
end