1 | // Licensed to the Apache Software Foundation (ASF) under one |
2 | // or more contributor license agreements. See the NOTICE file |
3 | // distributed with this work for additional information |
4 | // regarding copyright ownership. The ASF licenses this file |
5 | // to you under the Apache License, Version 2.0 (the |
6 | // "License"); you may not use this file except in compliance |
7 | // with the License. You may obtain a copy of the License at |
8 | // |
9 | // http://www.apache.org/licenses/LICENSE-2.0 |
10 | // |
11 | // Unless required by applicable law or agreed to in writing, |
12 | // software distributed under the License is distributed on an |
13 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
14 | // KIND, either express or implied. See the License for the |
15 | // specific language governing permissions and limitations |
16 | // under the License. template <typename T> |
17 | |
18 | #ifndef ARROW_UTIL_STRING_BUILDER_H |
19 | #define ARROW_UTIL_STRING_BUILDER_H |
20 | |
21 | #include <sstream> |
22 | #include <string> |
23 | #include <utility> |
24 | |
25 | namespace arrow { |
26 | namespace util { |
27 | |
28 | template <typename Head> |
29 | void StringBuilderRecursive(std::stringstream& stream, Head&& head) { |
30 | stream << head; |
31 | } |
32 | |
33 | template <typename Head, typename... Tail> |
34 | void StringBuilderRecursive(std::stringstream& stream, Head&& head, Tail&&... tail) { |
35 | StringBuilderRecursive(stream, std::forward<Head>(head)); |
36 | StringBuilderRecursive(stream, std::forward<Tail>(tail)...); |
37 | } |
38 | |
39 | template <typename... Args> |
40 | std::string StringBuilder(Args&&... args) { |
41 | std::stringstream stream; |
42 | |
43 | StringBuilderRecursive(stream, std::forward<Args>(args)...); |
44 | |
45 | return stream.str(); |
46 | } |
47 | |
48 | } // namespace util |
49 | } // namespace arrow |
50 | |
51 | #endif // ARROW_UTIL_STRING_BUILDER_H |
52 | |