next_year(p1 = v1)
This method is equivalent to d >> (n * 12).
Date.new(2001,2,3).next_year #=> #<Date: 2002-02-03 ...> Date.new(2008,2,29).next_year #=> #<Date: 2009-02-28 ...> Date.new(2008,2,29).next_year(4) #=> #<Date: 2012-02-29 ...>
See also Date#>>.
static VALUE d_lite_next_year(int argc, VALUE *argv, VALUE self) { VALUE n; rb_scan_args(argc, argv, "01", &n); if (argc < 1) n = INT2FIX(1); return d_lite_rshift(self, f_mul(n, INT2FIX(12))); }