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\DOC dest_realintconst
\TYPE {dest_realintconst : term -> num}
\SYNOPSIS
Converts an integer literal of type {:real} to an OCaml number.
\DESCRIBE
The call {dest_realintconst t} where {t} is a canonical integer literal of type
{:real}, returns the corresponding OCaml number (type {num}). The permissible
forms of integer literals are `{&n}' for a numeral {n} or `{-- &n}' for a
nonzero numeral {n}.
\FAILURE
Fails if applied to a term that is not a canonical integer literal of type
{:real}.
\EXAMPLE
{
# dest_realintconst `-- &27 :real`;;
val it : num = -27
}
\SEEALSO
dest_intconst, is_realintconst, mk_realintconst, rat_of_term.
\ENDDOC
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