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https://github.com/golang/go
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53 lines
765 B
Go
53 lines
765 B
Go
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// run
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"encoding/binary"
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)
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var (
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ch1 = make(chan int)
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ch2 = make(chan int)
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bin = []byte("a\000\000\001")
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want = binary.BigEndian.Uint32(bin)
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c consumer = noopConsumer{}
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)
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type msg struct {
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code uint32
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}
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type consumer interface {
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consume(msg)
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}
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type noopConsumer struct{}
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func (noopConsumer) consume(msg) {}
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func init() {
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close(ch1)
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}
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func main() {
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var m msg
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m.code = binary.BigEndian.Uint32(bin)
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select {
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case <-ch1:
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c.consume(m)
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if m.code != want {
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// can not use m.code here, or it will work
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panic("BigEndian read failed")
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}
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case <-ch2:
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}
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}
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