You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.5 KiB
65 lines
1.5 KiB
// Copyright 2011 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found here: https://github.com/golang/go/blob/master/LICENSE
|
|
|
|
package goreq
|
|
|
|
import (
|
|
"strings"
|
|
"unicode"
|
|
)
|
|
|
|
// tagOptions is the string following a comma in a struct field's "json"
|
|
// tag, or the empty string. It does not include the leading comma.
|
|
type tagOptions string
|
|
|
|
// parseTag splits a struct field's json tag into its name and
|
|
// comma-separated options.
|
|
func parseTag(tag string) (string, tagOptions) {
|
|
if idx := strings.Index(tag, ","); idx != -1 {
|
|
return tag[:idx], tagOptions(tag[idx+1:])
|
|
}
|
|
return tag, tagOptions("")
|
|
}
|
|
|
|
// Contains reports whether a comma-separated list of options
|
|
// contains a particular substr flag. substr must be surrounded by a
|
|
// string boundary or commas.
|
|
func (o tagOptions) Contains(optionName string) bool {
|
|
if len(o) == 0 {
|
|
return false
|
|
}
|
|
s := string(o)
|
|
for s != "" {
|
|
var next string
|
|
i := strings.Index(s, ",")
|
|
if i >= 0 {
|
|
s, next = s[:i], s[i+1:]
|
|
}
|
|
if s == optionName {
|
|
return true
|
|
}
|
|
s = next
|
|
}
|
|
return false
|
|
}
|
|
|
|
func isValidTag(s string) bool {
|
|
if s == "" {
|
|
return false
|
|
}
|
|
for _, c := range s {
|
|
switch {
|
|
case strings.ContainsRune("!#$%&()*+-./:<=>?@[]^_{|}~ ", c):
|
|
// Backslash and quote chars are reserved, but
|
|
// otherwise any punctuation chars are allowed
|
|
// in a tag name.
|
|
default:
|
|
if !unicode.IsLetter(c) && !unicode.IsDigit(c) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|