【Go 语言社区】golang的bufio用于内容解析

// from string.var r io.Reader = strings.NewReader(string("hello, world"))// from bytes.var r io.Reader = bytes.NewReader([]byte("hello, world!"))// from bytes buffer.var r io.Reader = bytes.NewBuffer([]byte("hello, world"))

// buffer readervar r io.Reader = bufio.NewReader(strings.NewReader(string("hello, world")))

// ReadString reads until the first occurrence of delim in the input,
// returning a string containing the data up to and including the delimiter.
// If ReadString encounters an error before finding a delimiter,
// it returns the data read before the error and the error itself (often io.EOF).
// ReadString returns err != nil if and only if the returned data does not end in// delim.
// For simple uses, a Scanner may be more convenient.
func (b *Reader) ReadString(delim byte) (line string, err error) {

s := bufio.NewScanner(strings.NewReader("/*block comments*///line comments\n{}"))
s.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error){    // read more.
    return 0,nil,nil})for s.Scan() {
    fmt.Println(s.Text())
}
fmt.Println("err is", s.Err())