Class: FloatPowerInstruction
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/float/float_power.rb', line 17
def cleanup
pushes :float, @result
end
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#derive ⇒ Object
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# File 'lib/instructions/float/float_power.rb', line 9
def derive
if !(@base**@exp).nan?
@result = ValuePoint.new("float", @base**@exp)
else
raise Instruction::NaNResultError, "#{self.class.to_nudgecode} did not return a float"
end
end
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#preconditions? ⇒ Boolean
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# File 'lib/instructions/float/float_power.rb', line 2
def preconditions?
needs :float, 2
end
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#setup ⇒ Object
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# File 'lib/instructions/float/float_power.rb', line 5
def setup
@exp = @context.pop_value(:float)
@base = @context.pop_value(:float)
end
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