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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 "unicode/utf8"

func main() {

        var chars [6]rune

        chars[0] = 'a'

        chars[1] = 'b'

        chars[2] = 'c'

        chars[3] = '\u65e5'

        chars[4] = '\u672c'

        chars[5] = '\u8a9e'

        s := ""

        for i := 0; i < 6; i++ {

                s += string(chars[i])

        }

        var l = len(s)

        for w, i, j := 0, 0, 0; i < l; i += w {

                var r rune

                r, w = utf8.DecodeRuneInString(s[i:len(s)])

                if w == 0 {

                        panic("zero width in string")

                }

                if r != chars[j] {

                        panic("wrong value from string")

                }

                j++

        }

        // encoded as bytes:  'a' 'b' 'c' e6 97 a5 e6 9c ac e8 aa 9e

        const L = 12

        if L != l {

                panic("wrong length constructing array")

        }

        a := make([]byte, L)

        a[0] = 'a'

        a[1] = 'b'

        a[2] = 'c'

        a[3] = 0xe6

        a[4] = 0x97

        a[5] = 0xa5

        a[6] = 0xe6

        a[7] = 0x9c

        a[8] = 0xac

        a[9] = 0xe8

        a[10] = 0xaa

        a[11] = 0x9e

        for w, i, j := 0, 0, 0; i < L; i += w {

                var r rune

                r, w = utf8.DecodeRune(a[i:L])

                if w == 0 {

                        panic("zero width in bytes")

                }

                if r != chars[j] {

                        panic("wrong value from bytes")

                }

                j++

        }

}