339 lines
6.5 KiB
Go
339 lines
6.5 KiB
Go
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// Copyright 2015 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 strconv_test
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import (
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"fmt"
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"log"
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"strconv"
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)
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func ExampleAppendBool() {
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b := []byte("bool:")
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b = strconv.AppendBool(b, true)
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fmt.Println(string(b))
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// Output:
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// bool:true
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}
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func ExampleAppendFloat() {
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b32 := []byte("float32:")
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b32 = strconv.AppendFloat(b32, 3.1415926535, 'E', -1, 32)
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fmt.Println(string(b32))
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b64 := []byte("float64:")
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b64 = strconv.AppendFloat(b64, 3.1415926535, 'E', -1, 64)
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fmt.Println(string(b64))
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// Output:
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// float32:3.1415927E+00
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// float64:3.1415926535E+00
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}
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func ExampleAppendInt() {
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b10 := []byte("int (base 10):")
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b10 = strconv.AppendInt(b10, -42, 10)
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fmt.Println(string(b10))
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b16 := []byte("int (base 16):")
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b16 = strconv.AppendInt(b16, -42, 16)
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fmt.Println(string(b16))
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// Output:
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// int (base 10):-42
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// int (base 16):-2a
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}
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func ExampleAppendQuote() {
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b := []byte("quote:")
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b = strconv.AppendQuote(b, `"Fran & Freddie's Diner"`)
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fmt.Println(string(b))
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// Output:
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// quote:"\"Fran & Freddie's Diner\""
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}
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func ExampleAppendQuoteRune() {
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b := []byte("rune:")
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b = strconv.AppendQuoteRune(b, '☺')
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fmt.Println(string(b))
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// Output:
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// rune:'☺'
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}
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func ExampleAppendQuoteRuneToASCII() {
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b := []byte("rune (ascii):")
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b = strconv.AppendQuoteRuneToASCII(b, '☺')
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fmt.Println(string(b))
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// Output:
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// rune (ascii):'\u263a'
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}
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func ExampleAppendQuoteToASCII() {
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b := []byte("quote (ascii):")
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b = strconv.AppendQuoteToASCII(b, `"Fran & Freddie's Diner"`)
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fmt.Println(string(b))
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// Output:
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// quote (ascii):"\"Fran & Freddie's Diner\""
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}
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func ExampleAppendUint() {
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b10 := []byte("uint (base 10):")
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b10 = strconv.AppendUint(b10, 42, 10)
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fmt.Println(string(b10))
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b16 := []byte("uint (base 16):")
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b16 = strconv.AppendUint(b16, 42, 16)
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fmt.Println(string(b16))
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// Output:
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// uint (base 10):42
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// uint (base 16):2a
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}
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func ExampleAtoi() {
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v := "10"
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if s, err := strconv.Atoi(v); err == nil {
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fmt.Printf("%T, %v", s, s)
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}
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// Output:
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// int, 10
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}
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func ExampleCanBackquote() {
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fmt.Println(strconv.CanBackquote("Fran & Freddie's Diner ☺"))
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fmt.Println(strconv.CanBackquote("`can't backquote this`"))
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// Output:
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// true
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// false
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}
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func ExampleFormatBool() {
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v := true
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s := strconv.FormatBool(v)
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fmt.Printf("%T, %v\n", s, s)
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// Output:
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// string, true
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}
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func ExampleFormatFloat() {
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v := 3.1415926535
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s32 := strconv.FormatFloat(v, 'E', -1, 32)
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fmt.Printf("%T, %v\n", s32, s32)
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s64 := strconv.FormatFloat(v, 'E', -1, 64)
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fmt.Printf("%T, %v\n", s64, s64)
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// Output:
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// string, 3.1415927E+00
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// string, 3.1415926535E+00
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}
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func ExampleFormatInt() {
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v := int64(-42)
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s10 := strconv.FormatInt(v, 10)
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fmt.Printf("%T, %v\n", s10, s10)
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s16 := strconv.FormatInt(v, 16)
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fmt.Printf("%T, %v\n", s16, s16)
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// Output:
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// string, -42
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// string, -2a
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}
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func ExampleFormatUint() {
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v := uint64(42)
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s10 := strconv.FormatUint(v, 10)
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fmt.Printf("%T, %v\n", s10, s10)
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s16 := strconv.FormatUint(v, 16)
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fmt.Printf("%T, %v\n", s16, s16)
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// Output:
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// string, 42
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// string, 2a
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}
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func ExampleIsPrint() {
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c := strconv.IsPrint('\u263a')
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fmt.Println(c)
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bel := strconv.IsPrint('\007')
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fmt.Println(bel)
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// Output:
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// true
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// false
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}
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func ExampleItoa() {
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i := 10
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s := strconv.Itoa(i)
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fmt.Printf("%T, %v\n", s, s)
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// Output:
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// string, 10
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}
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func ExampleParseBool() {
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v := "true"
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if s, err := strconv.ParseBool(v); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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// Output:
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// bool, true
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}
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func ExampleParseFloat() {
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v := "3.1415926535"
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if s, err := strconv.ParseFloat(v, 32); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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if s, err := strconv.ParseFloat(v, 64); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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// Output:
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// float64, 3.1415927410125732
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// float64, 3.1415926535
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}
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func ExampleParseInt() {
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v32 := "-354634382"
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if s, err := strconv.ParseInt(v32, 10, 32); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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if s, err := strconv.ParseInt(v32, 16, 32); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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v64 := "-3546343826724305832"
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if s, err := strconv.ParseInt(v64, 10, 64); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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if s, err := strconv.ParseInt(v64, 16, 64); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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// Output:
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// int64, -354634382
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// int64, -3546343826724305832
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}
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func ExampleParseUint() {
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v := "42"
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if s, err := strconv.ParseUint(v, 10, 32); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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if s, err := strconv.ParseUint(v, 10, 64); err == nil {
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fmt.Printf("%T, %v\n", s, s)
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}
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// Output:
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// uint64, 42
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// uint64, 42
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}
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func ExampleQuote() {
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s := strconv.Quote(`"Fran & Freddie's Diner ☺"`)
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fmt.Println(s)
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// Output:
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// "\"Fran & Freddie's Diner\t☺\""
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}
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func ExampleQuoteRune() {
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s := strconv.QuoteRune('☺')
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fmt.Println(s)
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// Output:
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// '☺'
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}
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func ExampleQuoteRuneToASCII() {
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s := strconv.QuoteRuneToASCII('☺')
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fmt.Println(s)
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// Output:
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// '\u263a'
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}
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func ExampleQuoteToASCII() {
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s := strconv.QuoteToASCII(`"Fran & Freddie's Diner ☺"`)
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fmt.Println(s)
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// Output:
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// "\"Fran & Freddie's Diner\t\u263a\""
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}
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func ExampleUnquote() {
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test := func(s string) {
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t, err := strconv.Unquote(s)
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if err != nil {
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fmt.Printf("Unquote(%#v): %v\n", s, err)
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} else {
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fmt.Printf("Unquote(%#v) = %v\n", s, t)
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}
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}
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s := `\"Fran & Freddie's Diner\t\u263a\"\"`
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// If the string doesn't have quotes, it can't be unquoted.
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test(s) // invalid syntax
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test("`" + s + "`")
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test(`"` + s + `"`)
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test(`'\u263a'`)
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// Output:
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// Unquote("\\\"Fran & Freddie's Diner\\t\\u263a\\\"\\\""): invalid syntax
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// Unquote("`\\\"Fran & Freddie's Diner\\t\\u263a\\\"\\\"`") = \"Fran & Freddie's Diner\t\u263a\"\"
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// Unquote("\"\\\"Fran & Freddie's Diner\\t\\u263a\\\"\\\"\"") = "Fran & Freddie's Diner ☺""
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// Unquote("'\\u263a'") = ☺
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}
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func ExampleUnquoteChar() {
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v, mb, t, err := strconv.UnquoteChar(`\"Fran & Freddie's Diner\"`, '"')
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println("value:", string(v))
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fmt.Println("multibyte:", mb)
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fmt.Println("tail:", t)
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// Output:
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// value: "
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// multibyte: false
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// tail: Fran & Freddie's Diner\"
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}
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func ExampleNumError() {
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str := "Not a number"
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if _, err := strconv.ParseFloat(str, 64); err != nil {
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e := err.(*strconv.NumError)
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fmt.Println("Func:", e.Func)
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fmt.Println("Num:", e.Num)
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fmt.Println("Err:", e.Err)
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fmt.Println(err)
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}
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// Output:
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// Func: ParseFloat
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// Num: Not a number
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// Err: invalid syntax
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// strconv.ParseFloat: parsing "Not a number": invalid syntax
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}
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