Class: NameUnbindInstruction

Inherits:
Instruction show all
Defined in:
lib/instructions/name/name_unbind.rb

Overview

Pops the top :name item, and if it is bound to a name (a local, not a variable) it removes that binding.

needs: 1 :name

pushes: nothing

Instance Attribute Summary

Attributes inherited from Instruction

#context

Instance Method Summary collapse

Methods inherited from Instruction

all_instructions, #go, inherited, #initialize, #needs, #pushes, to_nudgecode

Constructor Details

This class inherits a constructor from Instruction

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/instructions/name/name_unbind.rb', line 21

def cleanup
  @context.unbind_name(@lost_name)
end

#derive ⇒ Object 



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# File 'lib/instructions/name/name_unbind.rb', line 17

def derive
  @lost_name = @arg1.name
end

#preconditions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/instructions/name/name_unbind.rb', line 9

def preconditions?
  needs :name,1
end

#setup ⇒ Object 



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# File 'lib/instructions/name/name_unbind.rb', line 13

def setup
  @arg1 = @context.pop(:name)
end