Class: CodeListInstruction

Inherits:
Instruction show all
Defined in:
lib/instructions/code/code_list.rb

Overview

pops the top 2 items from the :code stack; pushes a new :code item containing a block obtained by combining the other listings into one block

note: the top stack item (the “attachment”) is the second item of the resulting list

needs: 2 :code

pushes: 1 :code

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/code/code_list.rb', line 26

def cleanup
  pushes :code, @result
end

#derive ⇒ Object 



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# File 'lib/instructions/code/code_list.rb', line 19

def derive
  listed = []
  listed << NudgeProgram.new(@arg1).linked_code unless @arg1 == ""
  listed << NudgeProgram.new(@arg2).linked_code unless @arg2 == ""
  combined = CodeblockPoint.new(listed).blueprint
  @result = ValuePoint.new("code", combined)
end

#preconditions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/instructions/code/code_list.rb', line 12

def preconditions?
  needs :code, 2
end

#setup ⇒ Object 



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# File 'lib/instructions/code/code_list.rb', line 15

def setup
  @arg2 = @context.pop_value(:code)
  @arg1 = @context.pop_value(:code)
end