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|
package jen
import (
"fmt"
"io"
"sort"
"strconv"
)
// Tag renders a struct tag
func Tag(items map[string]string) *Statement {
return newStatement().Tag(items)
}
// Tag renders a struct tag
func (g *Group) Tag(items map[string]string) *Statement {
// notest
// don't think this can ever be used in valid code?
s := Tag(items)
g.items = append(g.items, s)
return s
}
// Tag renders a struct tag
func (s *Statement) Tag(items map[string]string) *Statement {
c := tag{
items: items,
}
*s = append(*s, c)
return s
}
type tag struct {
items map[string]string
}
func (t tag) isNull(f *File) bool {
return len(t.items) == 0
}
func (t tag) render(f *File, w io.Writer, s *Statement) error {
if t.isNull(f) {
// notest
// render won't be called if t is null
return nil
}
var str string
var sorted []string
for k := range t.items {
sorted = append(sorted, k)
}
sort.Strings(sorted)
for _, k := range sorted {
v := t.items[k]
if len(str) > 0 {
str += " "
}
str += fmt.Sprintf(`%s:"%s"`, k, v)
}
if strconv.CanBackquote(str) {
str = "`" + str + "`"
} else {
str = strconv.Quote(str)
}
if _, err := w.Write([]byte(str)); err != nil {
return err
}
return nil
}
|
