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.



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# File 'lib/ruby_parser_extras.rb', line 969

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

Instance Attribute Details

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/ruby_parser_extras.rb', line 967

def stack
  @stack
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 974

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

#is_in_state ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 978

def is_in_state
  @stack.last
end

#lexpop ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 982

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

#pop ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 989

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

#push(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 995

def push val
  @stack.push val
end