campoy

fs := token.NewFileSet()

for _, arg := range os.Args[1:] {
	b, err := ioutil.ReadFile(arg)
	if err != nil {
		log.Fatal(err)
	}

	f := fs.AddFile(arg, fs.Base(), len(b))
	var s scanner.Scanner

campoy

counts := make(map[string]int)

// [code removed for clarity]

for {
	_, tok, lit := s.Scan()
	if tok == token.EOF {
		break
	}
	if tok == token.IDENT {

campoy

package main

import (
	"fmt"
	"go/parser"
	"go/token"
	"log"
)

func main() {

campoy

package main

import (
	"fmt"
	"go/parser"
	"go/token"
	"log"
)

func main() {

campoy

package main

import (
	"go/parser"
	"go/token"
	"log"

  "github.com/davecgh/go-spew/spew"
)

campoy

package main

import (
	"go/parser"
	"go/printer"
	"go/token"
	"log"
	"os"
)

campoy

type Visitor interface {
	Visit(node Node) (w Visitor)
}

campoy

package main

import (
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
	"log"
)

campoy

type visitor int

func (v visitor) Visit(n ast.Node) ast.Visitor {
	if n == nil {
		return nil
	}
	fmt.Printf("%s%T\n", strings.Repeat("\t", int(v)), n)
	return v + 1
}

campoy

package main

import (
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
	"log"
	"os"
	"strings"