ly_rational2scm (Rational r)
{
if (r.is_infinity ())
- if (r > Rational(0))
- return scm_inf ();
- else
+ {
+ if (r > Rational(0))
+ return scm_inf ();
+
return scm_difference (scm_inf (), SCM_UNDEFINED);
+ }
return scm_divide (scm_from_int64 (r.numerator ()),
scm_from_int64 (r.denominator ()));
Rational
robust_scm2rational (SCM n, Rational rat)
{
- if (scm_is_real (n)
- && (scm_is_true (scm_exact_p (n))
- || scm_is_true (scm_inf_p (n))))
+ if (ly_is_rational (n))
return ly_scm2rational (n);
else
return rat;
}
+bool
+ly_is_rational (SCM n)
+{
+ return (scm_is_real (n)
+ && (scm_is_true (scm_exact_p (n))
+ || scm_is_true (scm_inf_p (n))));
+}
+
SCM
alist_to_hashq (SCM alist)
{