Class: IDL::Engine::ProductionStack

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ProductionStack

Returns a new instance of ProductionStack.



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# File 'lib/ridl/runner.rb', line 38

def initialize
  @stack = []
  @index = {}
end

Instance Method Details

#[](id) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 83

def [](id)
  @stack[@index[id.to_sym]].last
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ridl/runner.rb', line 47

def empty?
  @stack.empty?
end

#has?(id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ridl/runner.rb', line 79

def has?(id)
  @index.has_key?(id.to_sym)
end

#peek ⇒ Object 



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# File 'lib/ridl/runner.rb', line 64

def peek
  return nil if empty?

  id, _ = @stack.first
  id
end

#pop ⇒ Object 



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# File 'lib/ridl/runner.rb', line 56

def pop
  return nil if empty?

  id, prod = @stack.shift
  @index.delete(id)
  prod
end

#push(id, prod) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 51

def push(id, prod)
  @index[id.to_sym] = @stack.size
  @stack << [id.to_sym, prod]
end

#remove(id) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 71

def remove(id)
  return nil unless has?(id)

  i = @index.delete(id.to_sym)
  _, producer = @productionstack.delete(i)
  producer
end

#size ⇒ Object 



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# File 'lib/ridl/runner.rb', line 43

def size
  @stack.size
end