英文:
Package is found but contents are not?
问题
我在构建我的Go项目时遇到了一个奇怪的错误。
我的目录结构如下：
-$GOPATH
-src
-main
-main.go
-configuration
-configuration.go
configuration.go:
package configuration;
type Config int;
func (c Config) Parse(s string) map[string]string {...}
main.go
package main;
import "configuration";
func main() {
var config Config;
argMap := config.parse(...);
return;
}
如果我的工作目录是$GOPATH，我执行以下操作：
go build configuration - 没有输出，正常
go build main
imported and not used "configuration"
undefined: Config
所以我的包被找到了（$GOPATH/pkg中包含了具有正确内容的configuration.go - 我可以看到Parse方法），而且main导入了它，但是却无法识别它的内容？
我猜测问题可能是Config类型没有被导出？为什么会这样呢？
英文:
I get a strange error while building my go project.
My structure:
-$GOPATH
-src
-main
-main.go
-configuration
-configuration.go
configuration.go:
package configuration;
type Config int;
func (c Config) Parse(s string) map[string]string {...}
main.go
package main;
import"configuration"
func main() {
var config Config;
argMap := config.parse(...);
return;
}
if my working directory is $GOPATH, I do:
go build configuration - no output, OK
go build main
imported and not used "configuration"
undefined: Config
So my package is found ($GOPATH/pkg contains configuration.go with correct content - I can see the Parse method) and main imports it, but does not recognize its contents?
I recon the problem is that the type Config is not exported? Why would that be?
答案1
得分: 2
你正在尝试使用main包中未定义的Config，而不是来自configuration包的Config（这就是错误信息"imported and not used"的原因）：
package main
import "configuration"
func main() {
var config configuration.Config
argMap := config.Parse(...)
}
第二个问题是调用未公开的parse而不是Parse，正如VonC所解释的那样。
英文:
You are trying to use Config from package main, where it is not defined, instead of the one from configuration (thats the error "imported and not used"):
package main
import "configuration"
func main() {
var config configuration.Config
argMap := config.Parse(...)
}
The second problem is calling unexported parse instead of Parse as explained by VonC.
答案2
得分: 0
argMap := config.parse(...)不会起作用，因为你声明了一个Parse()方法。
（就像"导出的方法configuration.Parse()"一样）
var config configuration.Config
argMap := config.Parse(...);
Config是被导出的，但方法是区分大小写的（参见导出标识符）。
英文:
argMap := config.parse(...); wouldn't work, since you declared a Parse() method.
(as in "exported method configuration.Parse()")
var config configuration.Config
argMap := config.Parse(...);
Config is exported, but the methods are case-sensitive (cf. Exported Identifiers).
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