go assign 源码
golang assign 代码
文件路径：/test/assign.go
// errorcheck
// Copyright 2009 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.
// Verify simple assignment errors are caught by the compiler.
// Does not compile.
package main
import "sync"
type T struct {
int
sync.Mutex
}
func main() {
{
var x, y sync.Mutex
x = y // ok
_ = x
}
{
var x, y T
x = y // ok
_ = x
}
{
var x, y [2]sync.Mutex
x = y // ok
_ = x
}
{
var x, y [2]T
x = y // ok
_ = x
}
{
x := sync.Mutex{0, 0} // ERROR "assignment.*Mutex"
_ = x
}
{
x := sync.Mutex{key: 0} // ERROR "(unknown|assignment).*Mutex"
_ = x
}
{
x := &sync.Mutex{} // ok
var y sync.Mutex // ok
y = *x // ok
*x = y // ok
_ = x
_ = y
}
{
var x = 1
{
x, x := 2, 3 // ERROR ".*x.* repeated on left side of :=|x redeclared in this block"
_ = x
}
_ = x
}
{
a, a := 1, 2 // ERROR ".*a.* repeated on left side of :=|a redeclared in this block"
_ = a
}
}
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