1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef LIBTEXTCLASSIFIER_ANNOTATOR_STRIP_UNPAIRED_BRACKETS_H_
18 #define LIBTEXTCLASSIFIER_ANNOTATOR_STRIP_UNPAIRED_BRACKETS_H_
19 
20 #include <string>
21 
22 #include "annotator/types.h"
23 #include "utils/utf8/unilib.h"
24 
25 namespace libtextclassifier3 {
26 
27 // If the first or the last codepoint of the given span is a bracket, the
28 // bracket is stripped if the span does not contain its corresponding paired
29 // version.
30 CodepointSpan StripUnpairedBrackets(
31     const UnicodeText::const_iterator& span_begin,
32     const UnicodeText::const_iterator& span_end, CodepointSpan span,
33     const UniLib& unilib);
34 
35 // Same as above but takes a UnicodeText instance for the span.
36 CodepointSpan StripUnpairedBrackets(const UnicodeText& context,
37                                     CodepointSpan span, const UniLib& unilib);
38 
39 // Same as above but takes a string instance.
40 CodepointSpan StripUnpairedBrackets(const std::string& context,
41                                     CodepointSpan span, const UniLib& unilib);
42 
43 }  // namespace libtextclassifier3
44 
45 #endif  // LIBTEXTCLASSIFIER_ANNOTATOR_STRIP_UNPAIRED_BRACKETS_H_
46