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\DOC is_realintconst
\TYPE {is_realintconst : term -> bool}
\SYNOPSIS
Tests if a term is an integer literal of type {:real}.
\DESCRIBE
The call {is_realintconst t} tests whether the term {t} is a canonical integer
literal of type {:real}, i.e. either `{&n}' for a numeral {n} or `{-- &n}' for
a nonzero numeral {n}. If so it returns {true}, otherwise {false}.
\FAILURE
Never fails.
\EXAMPLE
{
# is_realintconst `-- &3 :real`;;
val it : bool = true
# is_realintconst `&1 :int`;;
val it : bool = false
}
\SEEALSO
dest_realintconst, is_intconst, is_ratconst, mk_realintconst.
\ENDDOC
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