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+// Copyright 2012 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 xml_test
+
+import (
+ "encoding/xml"
+ "fmt"
+ "os"
+)
+
+func ExampleMarshalIndent() {
+ type Address struct {
+ City, State string
+ }
+ type Person struct {
+ XMLName xml.Name `xml:"person"`
+ Id int `xml:"id,attr"`
+ FirstName string `xml:"name>first"`
+ LastName string `xml:"name>last"`
+ Age int `xml:"age"`
+ Height float32 `xml:"height,omitempty"`
+ Married bool
+ Address
+ Comment string `xml:",comment"`
+ }
+
+ v := &Person{Id: 13, FirstName: "John", LastName: "Doe", Age: 42}
+ v.Comment = " Need more details. "
+ v.Address = Address{"Hanga Roa", "Easter Island"}
+
+ output, err := xml.MarshalIndent(v, " ", " ")
+ if err != nil {
+ fmt.Printf("error: %v\n", err)
+ }
+
+ os.Stdout.Write(output)
+ // Output:
+ // <person id="13">
+ // <name>
+ // <first>John</first>
+ // <last>Doe</last>
+ // </name>
+ // <age>42</age>
+ // <Married>false</Married>
+ // <City>Hanga Roa</City>
+ // <State>Easter Island</State>
+ // <!-- Need more details. -->
+ // </person>
+}
+
+func ExampleEncoder() {
+ type Address struct {
+ City, State string
+ }
+ type Person struct {
+ XMLName xml.Name `xml:"person"`
+ Id int `xml:"id,attr"`
+ FirstName string `xml:"name>first"`
+ LastName string `xml:"name>last"`
+ Age int `xml:"age"`
+ Height float32 `xml:"height,omitempty"`
+ Married bool
+ Address
+ Comment string `xml:",comment"`
+ }
+
+ v := &Person{Id: 13, FirstName: "John", LastName: "Doe", Age: 42}
+ v.Comment = " Need more details. "
+ v.Address = Address{"Hanga Roa", "Easter Island"}
+
+ enc := xml.NewEncoder(os.Stdout)
+ enc.Indent(" ", " ")
+ if err := enc.Encode(v); err != nil {
+ fmt.Printf("error: %v\n", err)
+ }
+
+ // Output:
+ // <person id="13">
+ // <name>
+ // <first>John</first>
+ // <last>Doe</last>
+ // </name>
+ // <age>42</age>
+ // <Married>false</Married>
+ // <City>Hanga Roa</City>
+ // <State>Easter Island</State>
+ // <!-- Need more details. -->
+ // </person>
+}
+
+// This example demonstrates unmarshaling an XML excerpt into a value with
+// some preset fields. Note that the Phone field isn't modified and that
+// the XML <Company> element is ignored. Also, the Groups field is assigned
+// considering the element path provided in its tag.
+func ExampleUnmarshal() {
+ type Email struct {
+ Where string `xml:"where,attr"`
+ Addr string
+ }
+ type Address struct {
+ City, State string
+ }
+ type Result struct {
+ XMLName xml.Name `xml:"Person"`
+ Name string `xml:"FullName"`
+ Phone string
+ Email []Email
+ Groups []string `xml:"Group>Value"`
+ Address
+ }
+ v := Result{Name: "none", Phone: "none"}
+
+ data := `
+ <Person>
+ <FullName>Grace R. Emlin</FullName>
+ <Company>Example Inc.</Company>
+ <Email where="home">
+ <Addr>gre@example.com</Addr>
+ </Email>
+ <Email where='work'>
+ <Addr>gre@work.com</Addr>
+ </Email>
+ <Group>
+ <Value>Friends</Value>
+ <Value>Squash</Value>
+ </Group>
+ <City>Hanga Roa</City>
+ <State>Easter Island</State>
+ </Person>
+ `
+ err := xml.Unmarshal([]byte(data), &v)
+ if err != nil {
+ fmt.Printf("error: %v", err)
+ return
+ }
+ fmt.Printf("XMLName: %#v\n", v.XMLName)
+ fmt.Printf("Name: %q\n", v.Name)
+ fmt.Printf("Phone: %q\n", v.Phone)
+ fmt.Printf("Email: %v\n", v.Email)
+ fmt.Printf("Groups: %v\n", v.Groups)
+ fmt.Printf("Address: %v\n", v.Address)
+ // Output:
+ // XMLName: xml.Name{Space:"", Local:"Person"}
+ // Name: "Grace R. Emlin"
+ // Phone: "none"
+ // Email: [{home gre@example.com} {work gre@work.com}]
+ // Groups: [Friends Squash]
+ // Address: {Hanga Roa Easter Island}
+}