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| // run
|
| // Copyright 2009 The Go Authors. All rights reserved.
| // Use of this source code is governed by a BSD-style
| // license that can be found in the LICENSE file.
|
| // Test range over strings.
|
| package main
|
| import (
| "fmt"
| "os"
| "unicode/utf8"
| )
|
| func main() {
| s := "\000\123\x00\xca\xFE\u0123\ubabe\U0000babe\U0010FFFFx"
| expect := []rune{0, 0123, 0, 0xFFFD, 0xFFFD, 0x123, 0xbabe, 0xbabe, 0x10FFFF, 'x'}
| offset := 0
| var i int
| var c rune
| ok := true
| cnum := 0
| for i, c = range s {
| r, size := utf8.DecodeRuneInString(s[i:len(s)]) // check it another way
| if i != offset {
| fmt.Printf("unexpected offset %d not %d\n", i, offset)
| ok = false
| }
| if r != expect[cnum] {
| fmt.Printf("unexpected rune %d from DecodeRuneInString: %x not %x\n", i, r, expect[cnum])
| ok = false
| }
| if c != expect[cnum] {
| fmt.Printf("unexpected rune %d from range: %x not %x\n", i, r, expect[cnum])
| ok = false
| }
| offset += size
| cnum++
| }
| if i != len(s)-1 {
| fmt.Println("after loop i is", i, "not", len(s)-1)
| ok = false
| }
|
| i = 12345
| c = 23456
| for i, c = range "" {
| }
| if i != 12345 {
| fmt.Println("range empty string assigned to index:", i)
| ok = false
| }
| if c != 23456 {
| fmt.Println("range empty string assigned to value:", c)
| ok = false
| }
|
| for _, c := range "a\xed\xa0\x80a" {
| if c != 'a' && c != utf8.RuneError {
| fmt.Printf("surrogate UTF-8 does not error: %U\n", c)
| ok = false
| }
| }
|
| if !ok {
| fmt.Println("BUG: stringrange")
| os.Exit(1)
| }
| }
|
|
