Circular Import in Go

Fix the error by moving shared types or functions into a separate package that both original packages can import without importing each other. Create a new file shared/types.go containing the common code, then update package A and package B to import your/module/shared instead of each other.

// shared/types.go
package shared

type Node struct {
    Circular bool
}

// package A
package a
import "your/module/shared"

func UseNode() shared.Node { return shared.Node{} }

// package B
package b
import "your/module/shared"

func CheckNode(n shared.Node) bool { return n.Circular }

Go prevents packages from importing each other in a circle because it creates an infinite loop during compilation. You fix this by creating a third, neutral package to hold the code both sides need. Think of it like two people arguing over a shared book; you give them both a copy of the book instead of letting them pass it back and forth.