Class: Minjs::ECMA262::ECMA262String

Inherits:
Literal show all
Defined in:
lib/minjs/ecma262/lit.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Literal

#lt?, #priority, #to_exp?, #ws?

Methods inherited from Base

#concat, #replace, #to_s

Constructor Details

#initialize(val) ⇒ ECMA262String

Returns a new instance of ECMA262String.



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# File 'lib/minjs/ecma262/lit.rb', line 185

def initialize(val)
  @val = val
end

Instance Attribute Details

#val ⇒ Object (readonly)

Returns the value of attribute val.



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# File 'lib/minjs/ecma262/lit.rb', line 183

def val
  @val
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/minjs/ecma262/lit.rb', line 197

def ==(obj)
  self.class == obj.class and @val == obj.val
end

#deep_dup ⇒ Object 



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# File 'lib/minjs/ecma262/lit.rb', line 189

def deep_dup
  self.class.new(@val)
end

#ecma262_typeof ⇒ Object 



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# File 'lib/minjs/ecma262/lit.rb', line 254

def ecma262_typeof
  :string
end

#to_ecma262_boolean ⇒ Object 



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# File 'lib/minjs/ecma262/lit.rb', line 246

def to_ecma262_boolean
  if @val.length == 0
    false
  else
    true
  end
end

#to_js(options = {}) ⇒ Object 



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# File 'lib/minjs/ecma262/lit.rb', line 201

def to_js(options = {})
  dq = @val.to_s.each_codepoint.select{|x| x == 0x22}.length
  sq = @val.to_s.each_codepoint.select{|x| x == 0x27}.length
  if dq <= sq
    t = "\""
  else
    t = "\'"
  end

  @val.to_s.each_codepoint do |c|
    if c == 0x5c
      t << ('\\\\')
    elsif c == 0x22 and dq <= sq
      t << ('\"')
    elsif c == 0x27 and dq > sq
      t << ('\\\'')
    elsif c >= 0x20 and c <= 0x7f
      t << ("%c" % c)
    elsif c == 8
      t << '\\b'
    elsif c == 9
      t << '\\t'
    elsif c == 0xa
      t << '\\n'
    elsif c == 0xb
      t << '\\v'
    elsif c == 0xc
      t << '\\v'
    elsif c == 0xd
      t << '\\r'
    elsif c == 0
      t << '\\0'
    elsif c < 0x20
      t << "\\x#{"%02x" % c}"
    else
      t << [c].pack("U*")
    end
  end
  if dq <= sq
    t << "\""
  else
    t << "\'"
  end
end

#traverse(parent) {|_self, parent| ... } ⇒ Object

Yields:

  • (_self, parent)

Yield Parameters:



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# File 'lib/minjs/ecma262/lit.rb', line 193

def traverse(parent)
  yield self, parent
end