// 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 template_test
|
|
import (
|
"log"
|
"os"
|
"strings"
|
"text/template"
|
)
|
|
// This example demonstrates a custom function to process template text.
|
// It installs the strings.Title function and uses it to
|
// Make Title Text Look Good In Our Template's Output.
|
func ExampleTemplate_func() {
|
// First we create a FuncMap with which to register the function.
|
funcMap := template.FuncMap{
|
// The name "title" is what the function will be called in the template text.
|
"title": strings.Title,
|
}
|
|
// A simple template definition to test our function.
|
// We print the input text several ways:
|
// - the original
|
// - title-cased
|
// - title-cased and then printed with %q
|
// - printed with %q and then title-cased.
|
const templateText = `
|
Input: {{printf "%q" .}}
|
Output 0: {{title .}}
|
Output 1: {{title . | printf "%q"}}
|
Output 2: {{printf "%q" . | title}}
|
`
|
|
// Create a template, add the function map, and parse the text.
|
tmpl, err := template.New("titleTest").Funcs(funcMap).Parse(templateText)
|
if err != nil {
|
log.Fatalf("parsing: %s", err)
|
}
|
|
// Run the template to verify the output.
|
err = tmpl.Execute(os.Stdout, "the go programming language")
|
if err != nil {
|
log.Fatalf("execution: %s", err)
|
}
|
|
// Output:
|
// Input: "the go programming language"
|
// Output 0: The Go Programming Language
|
// Output 1: "The Go Programming Language"
|
// Output 2: "The Go Programming Language"
|
}
|
