1// Copyright 2011 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package edn 6 7import ( 8 "strings" 9) 10 11// tagOptions is the string following a comma in a struct field's "json" 12// tag, or the empty string. It does not include the leading comma. 13type tagOptions string 14 15// parseTag splits a struct field's json tag into its name and 16// comma-separated options. 17func parseTag(tag string) (string, tagOptions) { 18 if idx := strings.Index(tag, ","); idx != -1 { 19 return tag[:idx], tagOptions(tag[idx+1:]) 20 } 21 return tag, tagOptions("") 22} 23 24// Contains reports whether a comma-separated list of options 25// contains a particular substr flag. substr must be surrounded by a 26// string boundary or commas. 27func (o tagOptions) Contains(optionName string) bool { 28 if len(o) == 0 { 29 return false 30 } 31 s := string(o) 32 for s != "" { 33 var next string 34 i := strings.Index(s, ",") 35 if i >= 0 { 36 s, next = s[:i], s[i+1:] 37 } 38 if s == optionName { 39 return true 40 } 41 s = next 42 } 43 return false 44} 45