github.com/gocuntian/go@v0.0.0-20160610041250-fee02d270bf8/src/text/scanner/example_test.go (about)

     1  // Copyright 2015 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package scanner_test
     6  
     7  import (
     8  	"fmt"
     9  	"strings"
    10  	"text/scanner"
    11  )
    12  
    13  func Example() {
    14  	const src = `
    15  	// This is scanned code.
    16  	if a > 10 {
    17  		someParsable = text
    18  	}`
    19  	var s scanner.Scanner
    20  	s.Filename = "example"
    21  	s.Init(strings.NewReader(src))
    22  	var tok rune
    23  	for tok != scanner.EOF {
    24  		tok = s.Scan()
    25  		fmt.Println("At position", s.Pos(), ":", s.TokenText())
    26  	}
    27  
    28  	// Output:
    29  	// At position example:3:4 : if
    30  	// At position example:3:6 : a
    31  	// At position example:3:8 : >
    32  	// At position example:3:11 : 10
    33  	// At position example:3:13 : {
    34  	// At position example:4:15 : someParsable
    35  	// At position example:4:17 : =
    36  	// At position example:4:22 : text
    37  	// At position example:5:3 : }
    38  	// At position example:5:3 :
    39  }