[boost] Stream input and output of NaN and infinity

From: Paul A Bristow (pbristow_at_[hidden])
Date: 2006-05-15 05:47:31

Jeff Garland proposed a solution the problem of serialization of NaN and
infinity which had beed discussed

http://article.gmane.org/gmane.comp.lib.boost.devel/141006/match=langer+nan

Although this is probably the right expendient solution which could be done
now (if anyone has the time and skill - SoC?), I also feel this is a general
problem that needs a Standard solution (some impect on lexical_cast) so I
have drafted a proposal for TR2 which is attached for comment.

Briefly, it is a KISS solution.

All infinities are output (and input) as one string like "Inf",

And all the various NaNs are also a single string "NaN",

And on input you get the numeric_limits<FPtype>::quiet_NaN() or infinity(),

Is the same for ALL FP types (including UDTs) and layouts.

Paul

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Paul A Bristow
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