Implement builders to build Go from source code

tests/source/methods/methods.go

@@ -0,0 +1,26 @@
+package main
+
+import "fmt"
+
+type rect struct {
+    width, height int
+}
+
+func (r *rect) area() int {
+    return r.width * r.height
+}
+
+func (r rect) perim() int {
+    return 2*r.width + 2*r.height
+}
+
+func main() {
+    r := rect{width: 10, height: 5}
+
+    fmt.Println("area: ", r.area())
+    fmt.Println("perim:", r.perim())
+
+    rp := &r
+    fmt.Println("area: ", rp.area())
+    fmt.Println("perim:", rp.perim())
+}