1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // This file contains the code snippets included in "The Laws of Reflection." 6 7 package main 8 9 import ( 10 "bufio" 11 "bytes" 12 "io" 13 "os" 14 ) 15 16 type MyInt int 17 18 var i int 19 var j MyInt 20 21 // STOP OMIT 22 23 // Reader is the interface that wraps the basic Read method. 24 type Reader interface { 25 Read(p []byte) (n int, err error) 26 } 27 28 // Writer is the interface that wraps the basic Write method. 29 type Writer interface { 30 Write(p []byte) (n int, err error) 31 } 32 33 // STOP OMIT 34 35 func readers() { // OMIT 36 var r io.Reader 37 r = os.Stdin 38 r = bufio.NewReader(r) 39 r = new(bytes.Buffer) 40 // and so on 41 // STOP OMIT 42 } 43 44 func typeAssertions() (interface{}, error) { // OMIT 45 var r io.Reader 46 tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0) 47 if err != nil { 48 return nil, err 49 } 50 r = tty 51 // STOP OMIT 52 var w io.Writer 53 w = r.(io.Writer) 54 // STOP OMIT 55 var empty interface{} 56 empty = w 57 // STOP OMIT 58 return empty, err 59 } 60 61 func main() { 62 } 63
