Print ast node types using golang with otto

otto.go

package parse

import (
	"fmt"
	"github.com/robertkrimen/otto/ast"
	"github.com/robertkrimen/otto/parser"
	"io/ioutil"
	"reflect"
)

func ParseFile(filename string) error {

	src, err := ioutil.ReadFile(filename)
	if err != nil {
		return err
	}

	program, err := parser.ParseFile(nil, filename, src, parser.StoreComments)
	if err != nil {
		return err
	}

	for _, node := range program.Body {
		fmt.Printf("Node type: %s\n", getNodeType(node))
	}

	return nil
}

func isExpressionStatement(node ast.Node) bool {
	return getNodeType(node) == "ExpressionStatement"

}

func isFunctionStatement(node ast.Node) bool {
	return getNodeType(node) == "FunctionStatement"

}

func getNodeType(node ast.Node) string {
	val := reflect.ValueOf(node).Elem()
	return val.Type().Name()
}