src/pkg/text/template/example_test.go

// Copyright 2011 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 template_test

import (
	"log"
	"os"
	"text/template"
)

// Dear Aunt Mildred,
// 
// It was a pleasure to see you at the wedding.
// Thank you for the lovely bone china tea set.
// 
// Best wishes,
// Josie
// 
// Dear Uncle John,
// 
// It is a shame you couldn't make it to the wedding.
// Thank you for the lovely moleskin pants.
// 
// Best wishes,
// Josie
// 
// Dear Cousin Rodney,
// 
// It is a shame you couldn't make it to the wedding.
// 
// Best wishes,
// Josie
func ExampleTemplate() {
	// Define a template.
	const letter = `
Dear {{.Name}},
{{if .Attended}}
It was a pleasure to see you at the wedding.{{else}}
It is a shame you couldn't make it to the wedding.{{end}}
{{with .Gift}}Thank you for the lovely {{.}}.
{{end}}
Best wishes,
Josie
`

	// Prepare some data to insert into the template.
	type Recipient struct {
		Name, Gift string
		Attended   bool
	}
	var recipients = []Recipient{
		{"Aunt Mildred", "bone china tea set", true},
		{"Uncle John", "moleskin pants", false},
		{"Cousin Rodney", "", false},
	}

	// Create a new template and parse the letter into it.
	t := template.Must(template.New("letter").Parse(letter))

	// Execute the template for each recipient.
	for _, r := range recipients {
		err := t.Execute(os.Stdout, r)
		if err != nil {
			log.Println("executing template:", err)
		}
	}
}