Add support for the Go programming language.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12108 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/go/callback/runme.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	. "./example"
+)
+
+func main() {
+	fmt.Println("Adding and calling a normal C++ callback")
+	fmt.Println("----------------------------------------")
+
+	caller := NewCaller()
+	callback := NewCallback()
+
+	caller.SetCallback(callback)
+	caller.Call()
+	caller.DelCallback()
+
+	callback = NewDirectorCallback(new(GoCallback))
+
+	fmt.Println()
+	fmt.Println("Adding and calling a Go callback")
+	fmt.Println("------------------------------------")
+
+	caller.SetCallback(callback)
+	caller.Call()
+	caller.DelCallback()
+
+	// Test that a double delete does not occur as the object has
+	// already been deleted from the C++ layer.
+	DeleteDirectorCallback(callback)
+
+	fmt.Println()
+	fmt.Println("Go exit")
+}
+
+type GoCallback struct{}
+
+func (p *GoCallback) Run() {
+	fmt.Println("GoCallback.Run")
+}