gcc/testsuite/go.test/test/stringrange.go

   1 // run
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 // Test range over strings.
   8
   9 package main
  10
  11 import (
  12         "fmt"
  13         "os"
  14         "unicode/utf8"
  15 )
  16
  17 func main() {
  18         s := "\000\123\x00\xca\xFE\u0123\ubabe\U0000babe\U0010FFFFx"
  19         expect := []rune{0, 0123, 0, 0xFFFD, 0xFFFD, 0x123, 0xbabe, 0xbabe, 0x10FFFF, 'x'}
  20         offset := 0
  21         var i int
  22         var c rune
  23         ok := true
  24         cnum := 0
  25         for i, c = range s {
  26                 r, size := utf8.DecodeRuneInString(s[i:len(s)]) // check it another way
  27                 if i != offset {
  28                         fmt.Printf("unexpected offset %d not %d\n", i, offset)
  29                         ok = false
  30                 }
  31                 if r != expect[cnum] {
  32                         fmt.Printf("unexpected rune %d from DecodeRuneInString: %x not %x\n", i, r, expect[cnum])
  33                         ok = false
  34                 }
  35                 if c != expect[cnum] {
  36                         fmt.Printf("unexpected rune %d from range: %x not %x\n", i, r, expect[cnum])
  37                         ok = false
  38                 }
  39                 offset += size
  40                 cnum++
  41         }
  42         if i != len(s)-1 {
  43                 fmt.Println("after loop i is", i, "not", len(s)-1)
  44                 ok = false
  45         }
  46
  47         i = 12345
  48         c = 23456
  49         for i, c = range "" {
  50         }
  51         if i != 12345 {
  52                 fmt.Println("range empty string assigned to index:", i)
  53                 ok = false
  54         }
  55         if c != 23456 {
  56                 fmt.Println("range empty string assigned to value:", c)
  57                 ok = false
  58         }
  59
  60         for _, c := range "a\xed\xa0\x80a" {
  61                 if c != 'a' && c != utf8.RuneError {
  62                         fmt.Printf("surrogate UTF-8 does not error: %U\n", c)
  63                         ok = false
  64                 }
  65         }
  66
  67         if !ok {
  68                 fmt.Println("BUG: stringrange")
  69                 os.Exit(1)
  70         }
  71 }