to_r()
Returns the value as a rational if possible (the imaginary part should be exactly zero).
Complex(1, 0).to_r #=> (1/1) Complex(1, 0.0).to_r # RangeError Complex(1, 2).to_r # RangeError
See rationalize.
static VALUE nucomp_to_r(VALUE self) { get_dat1(self); if (!k_exact_zero_p(dat->imag)) { rb_raise(rb_eRangeError, "can't convert %"PRIsVALUE" into Rational", self); } return f_to_r(dat->real); }
