Golang exported type

Question

Suppose I have a package within a package github.com/user/foo:

foo/
  main.go (package main)
  bar/
    bar.go (package bar)

Now, within bar.go I would like to use an exported type from main.go.

package main
type FooBar struct {}

If I try to import "github.com/user/foo" I get cycled imports not allowed error. Is there any way to do this, other than to create own repo for bar, which I don't want.

OneOfOne · Accepted Answer · 2014-08-21 18:26:16Z

6

You can separate it like:

foo/
  main.go (package main)
  foo/
    foo.go (package foo)
  bar/
    bar.go (package bar)

then import "path/foo/foo" in bar.go

answered Aug 21, 2014 at 18:26

OneOfOne

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6 Comments

if __name__ is None Over a year ago

This would require a rather large refactoring for my existing codebase...it would clean things up however.

OneOfOne Over a year ago

@Jan a little bit refactoring doesn't hurt and IMO it will be easier to maintain in the long run.

if __name__ is None Over a year ago

Oh yea I totally agree. It would remove main namespace pollution and modularize the codebase. But, its a large legacy project, so Im going to pass on this refactoring.

joshlf Over a year ago

A large legacy project in Go? I didn't realize we were old enough to have legacy projects... My how time flies.

joshlf Over a year ago

Well, yeah, but it wasn't really a stable language until the 1.0 release, which was 2.5 years ago. I doubt there are any existing (maintained) codebases using a pre-1.0 language spec.

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