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Subject: Re: [boost] [lexical_cast] Assumed internal double conversion of float?
From: Peter Dimov (lists_at_[hidden])
Date: 2019-01-29 17:42:28

Brian Kuhl wrote:

> Where does boost::detail::lcast_get_precision<float>() come from, and why
> is it 9 ?
> Is it perhaps assuming some intermediate double conversion internally?

boost::detail::lcast_get_precision<double>() is 17, so no.

My guess is that this is the precision that guarantees a perfect roundtrip.

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