I need the boost::mpl implementation of exp() function

Question

Does anybody know where can I find it? Otherwise I'll have to write it by myself.

Thanks.

Milwaukee Public Library ? Mars Polar Lander ? Messenger Plus! Live ? Monthly Purchase Limit ? — Stephane Rolland, Jan 07 '11 at 19:37
@David Heffernan: Do you know the exp() function? I need the mpl implementation of this function. I use boost anyway. I don't understand what you mean... — niXman, Jan 07 '11 at 20:12
@niXman You mean exp(), the inverse of log() or exponentiation to the power e, the natural number. Or do you mean something else? — David Heffernan, Jan 07 '11 at 20:15

Pete Kirkham · Accepted Answer · 2011-01-07T21:23:17.667

2

There is no exp function in boost::mpl 1.45. I've counted them. Twice.

Perhaps you could create your own by applying the times meta-function recursively.

edited Jan 07 '11 at 21:23

answered Jan 07 '11 at 21:15

Pete Kirkham

спасибо. я говорю на русском. посему, мне сложно излагать на английском. вопрос заключался в том, где можно найти готовую реализацию метафункции exp(). придется писать самому. – niXman Jan 07 '11 at 23:05
"Thanks. I speak Russian. Therefore, I find it difficult to express in English. question was, where you can find a ready implementation metafunction exp (). have to write myself" – Pete Kirkham Jan 08 '11 at 10:49
@niXman If you are dealing with integral powers of e, then you can create one easily using the recursive relationships - exp(2N) = exp(N)**2; exp(N+1) = e * exp(N), exp(0) = 1. I'm not sure how you would deal with fractional powers without converting a full implementation of exp() such as http://www.netlib.org/fdlibm/e_exp.c to a template meta-function. – Pete Kirkham Jan 08 '11 at 10:57

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