Class: CodeCdrInstruction
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_cdr.rb', line 17
def cleanup
pushes :code, @result
end
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#derive ⇒ Object
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# File 'lib/instructions/code/code_cdr.rb', line 8
def derive
tree = NudgeProgram.new(@arg)
if tree.linked_code.kind_of?(CodeblockPoint) && (tree.points > 2)
new_tree = tree.delete_point(2)
else
new_tree = CodeblockPoint.new([])
end
@result = ValuePoint.new("code", new_tree.blueprint)
end
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#preconditions? ⇒ Boolean
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# File 'lib/instructions/code/code_cdr.rb', line 2
def preconditions?
needs :code, 1
end
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#setup ⇒ Object
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# File 'lib/instructions/code/code_cdr.rb', line 5
def setup
@arg = @context.pop_value(:code)
end
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