1,安装graphviz
2，go get https://github.com/xiazemin/ast_graph
3，run ` package main
import "github.com/xiazemin/golang/ast/ast_graph/gen"
func main() { path := "/Users/didi/goLang/src/github.com/xiazemin/golang/ast/ast_graph/exp/main.go" dpath := "/Users/didi/goLang/src/github.com/xiazemin/golang/ast/ast_graph/" gen.GenSvg(path, dpath, "tree") }
`