golang issue52031 代码
文件路径：/src/go/types/testdata/fixedbugs/issue52031.go
/ -lang=go1.12
/ Copyright 2022 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package p
type resultFlags uint
/ Example from #52031.
/
/ The following shifts should not produce errors on Go < 1.13, as their
/ untyped constant operands are representable by type uint.
const (
_ resultFlags = (1 << iota) / 2
reportEqual
reportUnequal
reportByIgnore
reportByMethod
reportByFunc
reportByCycle
)
/ Invalid cases.
var x int = 1
var _ = (8 << x /* ERROR "signed shift count .* requires go1.13 or later" */)
const _ = (1 << 1.2 /* ERROR "truncated to uint" */)
var y float64
var _ = (1 << y /* ERROR "must be integer" */)