Class: RubyParserStuff::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, debug = false) ⇒ StackState

Returns a new instance of StackState.



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# File 'lib/ruby_parser_extras.rb', line 1837

def initialize name, debug=false
  @name = name
  @stack = [false]
  @debug = debug
end

Instance Attribute Details

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/ruby_parser_extras.rb', line 1835

def debug
  @debug
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/ruby_parser_extras.rb', line 1833

def name
  @name
end

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/ruby_parser_extras.rb', line 1834

def stack
  @stack
end

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1843

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

#is_in_state ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1847

def is_in_state
  log :is_in_state if debug
  @stack.last
end

#lexpop ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1852

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

#log(action) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1860

def log action
  c = caller[1]
  c = caller[2] if c =~ /expr_result/
  warn "%s_stack.%s: %p at %s" % [name, action, @stack, c.clean_caller]
  nil
end

#pop ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1867

def pop
  r = @stack.pop
  @stack.push false if @stack.empty?
  log :pop if debug
  r
end

#push(val) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1874

def push val
  @stack.push val
  log :push if debug
end

#reset ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1879

def reset
  @stack = [false]
  log :reset if debug
end

#restore(oldstate) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1884

def restore oldstate
  @stack.replace oldstate
  log :restore if debug
end

#store(base = false) ⇒ Object 



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# File 'lib/ruby_parser_extras.rb', line 1889

def store base = false
  result = @stack.dup
  @stack.replace [base]
  log :store if debug
  result
end