var data [3]int
	// By coincidence all of these fields are ints, which simplifies things.
	v := reflect.ValueOf(err)
	for i, name := range []string{"go116code", "go116start", "go116end"} {
		f := v.FieldByName(name)
		if !f.IsValid() {
			return 0, 0, 0, false
		}
		data[i] = int(f.Int())
	}
	return ErrorCode(data[0]), token.Pos(data[1]), token.Pos(data[2]), true

				value := int(constant.Val(obj.(*Const).Val()).(int64))
				f(codename, value, spec)
			}
		}
	}
}

func readCode(err Error) int {
	v := reflect.ValueOf(err)
	return int(v.FieldByName("go116code").Int())
}

func checkExample(t *testing.T, example string) error {
	t.Helper()
	fset := token.NewFileSet()
	if !strings.HasPrefix(example, "package") {
		example = "package p\n\n" + example
	}

		msg = "\t" + msg
	}

	span := spanOf(posn)
	e := Error{
		Fset:       check.fset,
		Pos:        span.pos,
		Msg:        stripAnnotations(msg),
		Soft:       soft,
		go116code:  code,
		go116start: span.start,
		go116end:   span.end,
	}

	if check.errpos != nil {
		// If we have an internal error and the errpos override is set, use it to
		// augment our error positioning.