if codeStr == "" {
		codeStr = strconv.Itoa(int(code))
	}
	f(fmt.Sprintf("%s_%s_%s", typ, codeStr, name))
	return err
}

// A timer is a time.Timer, as an interface which can be replaced in tests.
type http2timer = interface {
	C() <-chan time.Time
	Reset(d time.Duration) bool
	Stop() bool
}

// timeTimer adapts a time.Timer to the timer interface.
type http2timeTimer struct {

	case ir.OINDEX:
		n := n.(*ir.IndexExpr)
		switch {
		case n.X.Type().IsString():
			if n.Bounded() && ir.IsConst(n.X, constant.String) && ir.IsConst(n.Index, constant.Int) {
				// Replace "abc"[1] with 'b'.
				// Delayed until now because "abc"[1] is not an ideal constant.
				// See test/fixedbugs/issue11370.go.