Complex#to_r

() -> ::Rational

to_r → rational

static VALUE
nucomp_to_r(VALUE self)
{
    get_dat1(self);

    if (RB_FLOAT_TYPE_P(dat->imag) && FLOAT_ZERO_P(dat->imag)) {
        /* Do nothing here */
    }
    else if (!k_exact_zero_p(dat->imag)) {
        VALUE imag = rb_check_convert_type_with_id(dat->imag, T_RATIONAL, "Rational", idTo_r);
        if (NIL_P(imag) || !k_exact_zero_p(imag)) {
            rb_raise(rb_eRangeError, "can't convert %"PRIsVALUE" into Rational",
                     self);
        }
    }
    return f_to_r(dat->real);
}

Returns the value of self.real as a Rational, if possible:

Example

Complex.rect(1, 0).to_r              # => (1/1)
Complex.rect(1, Rational(0, 1)).to_r # => (1/1)
Complex.rect(1, 0.0).to_r            # => (1/1)

Raises RangeError if self.imag is not exactly zero (either Integer(0) or Rational(0, _n_)) and self.imag.to_r is not exactly zero.

Related: Complex#rationalize.

See also #to_json #to_s #to_i also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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