mirror of
https://github.com/golang/go
synced 2024-11-21 22:04:39 -07:00
119 lines
1.9 KiB
Go
119 lines
1.9 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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func main() {
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var c string
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a := `abc`
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b := `xyz`
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/* print a literal */
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print(`abc`)
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/* print a variable */
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print(b, "-")
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/* catenate literals */
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print(`abc`+`xyz`, "-")
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/* catenate variables */
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print(a+b, "-")
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/* compare literals */
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if `abc` == `xyz` || `abc` != "abc" || `abc` > `xyz` {
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panic("compare literals")
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}
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/* compare variables */
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if a == b || a != a || a > b {
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panic("compare variables")
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}
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/* cat */
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c = a + b
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print(c, "-")
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/* catequal */
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c = a
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c += b
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print(c, "-")
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/* clumsy evaluation */
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c = b
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c = a + c
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print(c, "-")
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/* len */
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if len(c) != 6 {
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print("len ", len(c))
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panic("fail")
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}
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/* index strings */
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for i := 0; i < len(c); i = i + 1 {
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if c[i] != (a + b)[i] {
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print("index ", i, " ", c[i], " ", (a + b)[i])
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panic("fail")
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}
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}
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/* slice strings */
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print(c[0:3], c[3:])
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print("\n")
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/* create string with integer constant */
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c = string('x')
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if c != "x" {
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print("create int ", c)
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panic("fail")
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}
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/* create string with integer variable */
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v := 'x'
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c = string(v)
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if c != "x" {
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print("create int ", c)
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panic("fail")
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}
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/* create string with byte array */
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var z1 [3]byte
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z1[0] = 'a'
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z1[1] = 'b'
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z1[2] = 'c'
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c = string(z1[0:])
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if c != "abc" {
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print("create byte array ", c)
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panic("fail")
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}
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/* create string with int array */
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var z2 [3]int
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z2[0] = 'a'
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z2[1] = '\u1234'
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z2[2] = 'c'
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c = string(z2[0:])
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if c != "a\u1234c" {
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print("create int array ", c)
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panic("fail")
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}
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/* create string with byte array pointer */
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z3 := new([3]byte)
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z3[0] = 'a'
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z3[1] = 'b'
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z3[2] = 'c'
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c = string(z3[0:])
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if c != "abc" {
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print("create array pointer ", c)
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panic("fail")
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}
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}
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