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// $G $F.go && $L $F.$A && ./$A.out

// 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.

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
        }

        if !ok {
                fmt.Println("BUG: stringrange")
                os.Exit(1)
        }
}