github.com/shogo82148/std@v1.22.1-0.20240327122250-4e474527810c/encoding/xml/example_marshaling_test.go (about)

     1  // Copyright 2018 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  package xml_test
     6  
     7  import (
     8  	"github.com/shogo82148/std/encoding/xml"
     9  	"github.com/shogo82148/std/fmt"
    10  	"github.com/shogo82148/std/log"
    11  )
    12  
    13  const (
    14  	Unknown Animal = iota
    15  	Gopher
    16  	Zebra
    17  )
    18  
    19  func Example_customMarshalXML() {
    20  	blob := `
    21  	<animals>
    22  		<animal>gopher</animal>
    23  		<animal>armadillo</animal>
    24  		<animal>zebra</animal>
    25  		<animal>unknown</animal>
    26  		<animal>gopher</animal>
    27  		<animal>bee</animal>
    28  		<animal>gopher</animal>
    29  		<animal>zebra</animal>
    30  	</animals>`
    31  	var zoo struct {
    32  		Animals []Animal `xml:"animal"`
    33  	}
    34  	if err := xml.Unmarshal([]byte(blob), &zoo); err != nil {
    35  		log.Fatal(err)
    36  	}
    37  
    38  	census := make(map[Animal]int)
    39  	for _, animal := range zoo.Animals {
    40  		census[animal] += 1
    41  	}
    42  
    43  	fmt.Printf("Zoo Census:\n* Gophers: %d\n* Zebras:  %d\n* Unknown: %d\n",
    44  		census[Gopher], census[Zebra], census[Unknown])
    45  
    46  	// Output:
    47  	// Zoo Census:
    48  	// * Gophers: 3
    49  	// * Zebras:  2
    50  	// * Unknown: 3
    51  }