eql?

/*
 * code-seq:
 *   struct.eql?(other)   => true or false
 *
 * Two structures are equal if they are the same object, or if all their
 * fields are equal (using <code>eql?</code>).
 */

static VALUE
rb_struct_eql(s, s2)
    VALUE s, s2;
{
    long i;

    if (s == s2) return Qtrue;
    if (TYPE(s2) != T_STRUCT) return Qfalse;
    if (rb_obj_class(s) != rb_obj_class(s2)) return Qfalse;
    if (RSTRUCT(s)->len != RSTRUCT(s2)->len) {
        rb_bug("inconsistent struct"); /* should never happen */
    }

    for (i=0; i<RSTRUCT(s)->len; i++) {
        if (!rb_eql(RSTRUCT(s)->ptr[i], RSTRUCT(s2)->ptr[i])) return Qfalse;
    }
    return Qtrue;
}