text
text/template
https://golang.org/pkg/text/template/
関連項目:
Examples:
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)
}
}
実行すると次のようになる:
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
type Template
https://golang.org/pkg/text/template/#Template
type Template struct {
*parse.Tree
// contains filtered or unexported fields
}
パースされたテンプレート。
func Delims
https://golang.org/pkg/text/template/#Template.Delims
func (t *Template) Delims(left, right string) *Template
デリミタ（区切り文字）を設定する。
デフォルトは {{, }} 。
テンプレートを返すので、メソッドチェインできる。
（なんかここだけRubyっぽい）
const script = `export <<.EnvKey>>=${<<.EnvKey>>:-"<<.Default>>"}
`
t := template.Must(template.New("script").Delims("<<", ">>").Parse(script))
t.Execute(os.Stdout, struct{ EnvKey, Default string}{"FOO", "foo"})