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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef Collections_h | |
6 #define Collections_h | |
7 | |
8 #include <cstddef> | |
9 | |
10 #if defined(__APPLE__) && !defined(_LIBCPP_VERSION) | |
11 #include <map> | |
12 #include <set> | |
13 | |
14 namespace blink { | |
15 namespace protocol { | |
16 | |
17 template <class Key, class T> using HashMap = std::map<Key, T>; | |
18 template <class Key> using HashSet = std::set<Key>; | |
19 | |
20 } // namespace protocol | |
21 } // namespace blink | |
22 | |
23 #else | |
24 #include <unordered_map> | |
25 #include <unordered_set> | |
26 | |
27 namespace blink { | |
28 namespace protocol { | |
29 | |
30 template <class Key, class T> using HashMap = std::unordered_map<Key, T>; | |
31 template <class Key> using HashSet = std::unordered_set<Key>; | |
32 | |
33 } // namespace protocol | |
34 } // namespace blink | |
35 | |
36 #endif // defined(__APPLE__) && !defined(_LIBCPP_VERSION) | |
37 | |
38 // Macro that returns a compile time constant with the length of an array, but g
ives an error if passed a non-array. | |
39 template<typename T, std::size_t Size> char (&ArrayLengthHelperFunction(T (&)[Si
ze]))[Size]; | |
40 // GCC needs some help to deduce a 0 length array. | |
41 #if defined(__GNUC__) | |
42 template<typename T> char (&ArrayLengthHelperFunction(T (&)[0]))[0]; | |
43 #endif | |
44 #define PROTOCOL_ARRAY_LENGTH(array) sizeof(::ArrayLengthHelperFunction(array)) | |
45 | |
46 #endif // !defined(Collections_h) | |
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