Class: CodeContainsQInstruction

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

Overview

pops the top 2 item of the :code stack; pushes a new ValuePoint onto the :bool stack, with value true if the second argument appears as a sub-block anywhere in the first argument

note: order matters, and the top stack item is the second argument, the second stack item is the first

needs: 2 :code

pushes: 1 :bool

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_contains_q.rb', line 30

def cleanup
  pushes :bool, @result
end

#derive ⇒ Object 



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# File 'lib/instructions/code/code_contains_q.rb', line 20

def derive
  looking_for_this = NudgeProgram.new(@arg1)
  tree = NudgeProgram.new(@arg2)
  if tree.parses? && looking_for_this.parses?
    found = tree.linked_code.any? {|point| point.blueprint == looking_for_this.blueprint}
  else
    found = false
  end
  @result = ValuePoint.new("bool", found)
end

#preconditions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/instructions/code/code_contains_q.rb', line 13

def preconditions?
  needs :code, 2
end

#setup ⇒ Object 



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# File 'lib/instructions/code/code_contains_q.rb', line 16

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