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author | Luke Shumaker <lukeshu@lukeshu.com> | 2022-08-13 15:11:17 -0600 |
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committer | Luke Shumaker <lukeshu@lukeshu.com> | 2022-08-13 15:18:11 -0600 |
commit | 234e0836f1040f7724251b4120a2351bcbf64131 (patch) | |
tree | 201b30fcc99eed470ae345a9bbe594f7ee7a1178 /borrowed_tags.go | |
parent | f2769bd863521cf316ec9237a498bfa4ecaa115f (diff) |
set up as a separate repo
Diffstat (limited to 'borrowed_tags.go')
-rw-r--r-- | borrowed_tags.go | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/borrowed_tags.go b/borrowed_tags.go new file mode 100644 index 0000000..07292b1 --- /dev/null +++ b/borrowed_tags.go @@ -0,0 +1,38 @@ +// Copyright 2011 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 lowmemjson + +import ( + "strings" +) + +// 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) { + tag, opt, _ := strings.Cut(tag, ",") + return tag, tagOptions(opt) +} + +// 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 name string + name, s, _ = strings.Cut(s, ",") + if name == optionName { + return true + } + } + return false +} |