英文:
expected declaration, found 'IDENT' item
问题
我正在使用Memcache Go API编写一小段代码，用于获取存储在其中一个键中的数据。以下是我使用的几行代码（从Go app-engine文档中获取的）：
import "appengine/memcache"
item := &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
但第2行给我一个编译错误***"expected declaration, found 'IDENT' item"***。
我是Go的新手，无法找出问题所在。
英文:
Im writing a small code using Memcache Go API to Get data stored in one of its keys . Here are few of lines of code i used ( got the code from Go app-engine docs )
import "appengine/memcache"
item := &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
But the line 2 gives me a compilation error "expected declaration, found 'IDENT' item"
I'm new to Go , not able to figure out the problem
答案1
得分: 76
:= 短变量声明 只能在函数内部使用。
所以要么将 item 变量声明放在一个函数内，像这样：
import "appengine/memcache"
func MyFunc() {
item := &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
// 对 item 进行操作
}
要么将其声明为全局变量并使用 var 关键字：
import "appengine/memcache"
var item = &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
英文:
The := Short variable declaration can only be used inside functions.
So either put the item variable declaration inside a function like this:
import "appengine/memcache"
func MyFunc() {
item := &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
// do something with item
}
Or make it a global variable and use the var keyword:
import "appengine/memcache"
var item = &memcache.Item {
Key: "lyric",
Value: []byte("Oh, give me a home"),
}
答案2
得分: 0
我遇到了相同的错误，但原因完全不同。
我使用了以下的包名。
package go-example
看起来，这不是一个有效的包名。删除连字符后，它就可以工作了。
英文:
I was getting the same error, but the reason was completely different.
I was using following package name.
package go-example
Seems like, it's not a valid package name. After removing the hyphen, it worked.
答案3
得分: 0
这个错误也会在给一个变量赋值时出现，而该变量的名称是一个关键字，比如使用 var:= 2。这也会导致错误信息为"expected declaration, found 'IDENT' item"。所以请更正变量名称，问题就会解决。
英文:
This error also shows up when assigning value to a variable whose name is a keyword
Like using var:= 2
This also causes the error "expected declaration, found 'IDENT' item"
So correct the name and it will be fine
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