There is no purpose, it's just an edge case of the simple lexical
specification you can find at:
http://caml.inria.fr/pub/docs/manual-ocaml/lex.html#float-literal
Everywhere digits are allowed, you can insert extraneous underscores. There
is no restriction that there must be at least one digit for underscores to
be valid. I don't see why there should be.
On Wed, Feb 8, 2012 at 1:46 PM, Matej Košík <
5764c029b688c1c0d24a2e97cd7...@gmail.com> wrote:
> Hi,
>
> Ocaml allows me to add '_' at the end of a floating point literal, e.g.:
>
> 1._
>
> What can be a purpose for that?
>
> In case of long or Long integers, optional adding of '_' between the
> integer and 'l' or 'L' make sense ('l' is hard to discriminate from '1'
> for many fonts). But in case of floats, I am not sure.
>
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