LazyObject quick question

[Kakhkhor Abdijalilov]

Hi everyone.
Can someone tell me if this code fragment is well defined and
efficient in QuantLib for all instruments?

std::cout << someInstrument.NVP() << '\t' << someInstrument.errorEstimate();

I am 95% confident that it is well defined for all instruments
(assuming that error estimate is applicable) and doesn't trigger
double calculation (thanks to LazyObject).

Thank you in advance,
KA.

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[Luigi Ballabio]

On Thu, 2010-08-05 at 06:27 -0500, Kakhkhor Abdijalilov wrote:
> Can someone tell me if this code fragment is well defined and
> efficient in QuantLib for all instruments?
>
> std::cout << someInstrument.NVP() << '\t' << someInstrument.errorEstimate();
>
> I am 95% confident that it is well defined for all instruments
> (assuming that error estimate is applicable) and doesn't trigger
> double calculation (thanks to LazyObject).

I'm 95% confident too.  No, make it 99%.  It works as you want as long
as one doesn't implement an instrument and overrides its machinery. I
don't think there's any such instrument in the library.

Luigi


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What is written without effort is, in general, read without pleasure.
-- Samuel Johnson



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