如何从Go中的字符串按路径导入包？

Question

I have a string with name of package (like "my/package/test") and I wanna import that and call some function from package.

Something like this:

func init() {
  var pkg string = "test/my/pkg"
  import pkg
  pkg.Test()
}

PS. Thanks for help

Answer 1

The Go language does not allow what you mentioned in your example. This is a conscious choice. In my opinion, the reason behind this choice has to do with compiler performance and ease of code understanding by the machine. This for example enables tools such as gofix that can partially fix Go code without need for user intervention.

It also enables a programmer to clearly see all of the statically imported packages used by the program.

See also the grammar rules for source file organization in the Go language specification.

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In relation to dynamically loading packages at run-time: Go has no support for loading packages at run-time. A future Go run-time might implement this feature (for example, it is occasionally being requested in messages in the golang-nuts mailing list), but the current state is that there is no support for this feature.