golang issue7998 代码
文件路径：/test/fixedbugs/issue7998.go
/ compile
/ Copyright 2014 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.
/ /tmp/x.go:5: cannot use _ as value
package p
func f(ch chan int) bool {
select {
case _, ok := <-ch:
return ok
}
_, ok := <-ch
_ = ok
select {
case _, _ = <-ch:
return true
}
return false
}