Created
September 8, 2019 04:24
-
-
Save blanchonvincent/1f1cb850a436ffbb81df14eb586f52df to your computer and use it in GitHub Desktop.
Medium - Compiler
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"fmt" | |
"go/scanner" | |
"go/token" | |
"io/ioutil" | |
) | |
func main() { | |
// src is the input that we want to tokenize. | |
src, _ := ioutil.ReadFile(`main.go`) | |
// Initialize the scanner. | |
var s scanner.Scanner | |
fset := token.NewFileSet() // positions are relative to fset | |
file := fset.AddFile("", fset.Base(), len(src)) // register input "file" | |
s.Init(file, src, nil /* no error handler */, scanner.ScanComments) | |
// Repeated calls to Scan yield the token sequence found in the input. | |
for { | |
pos, tok, lit := s.Scan() | |
if tok == token.EOF { | |
break | |
} | |
fmt.Printf("%s\t%s\t%q\n", fset.Position(pos), tok, lit) | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment