Class: StackState

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby_parser_extras.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ StackState

Returns a new instance of StackState.



657
658
659
660
 
# File 'lib/ruby_parser_extras.rb', line 657

def initialize(name)
  @name = name
  @stack = [false]
end

Instance Attribute Details

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



655
656
657
 
# File 'lib/ruby_parser_extras.rb', line 655

def stack
  @stack
end

Instance Method Details

#inspect ⇒ Object 



662
663
664
 
# File 'lib/ruby_parser_extras.rb', line 662

def inspect
  "StackState(#{@name}, #{@stack.inspect})"
end

#is_in_state ⇒ Object 



666
667
668
 
# File 'lib/ruby_parser_extras.rb', line 666

def is_in_state
  @stack.last
end

#lexpop ⇒ Object 



670
671
672
673
674
675
 
# File 'lib/ruby_parser_extras.rb', line 670

def lexpop
  raise if @stack.size == 0
  a = @stack.pop
  b = @stack.pop
  @stack.push(a || b)
end

#pop ⇒ Object 



677
678
679
680
681
 
# File 'lib/ruby_parser_extras.rb', line 677

def pop
  r = @stack.pop
  @stack.push false if @stack.size == 0
  r
end

#push(val) ⇒ Object 



683
684
685
686
 
# File 'lib/ruby_parser_extras.rb', line 683

def push val
  raise if val != true and val != false
  @stack.push val
end