1 /*
2  * Copyright (C) 2015 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 ART_CMDLINE_DETAIL_CMDLINE_DEBUG_DETAIL_H_
18 #define ART_CMDLINE_DETAIL_CMDLINE_DEBUG_DETAIL_H_
19 
20 #include <iostream>
21 #ifndef CMDLINE_NDEBUG
22 #define CMDLINE_DEBUG_LOG std::cerr
23 #else
24 #define CMDLINE_DEBUG_LOG ::art::detail::debug_log_ignore()
25 #endif
26 
27 namespace art {
28   // Implementation details for some template querying. Don't look inside if you hate templates.
29   namespace detail {
30     struct debug_log_ignore {
31       // Ignore most of the normal operator<< usage.
32       template <typename T>
33       debug_log_ignore& operator<<(const T&) { return *this; }
34       // Ignore std::endl and the like.
35       debug_log_ignore& operator<<(std::ostream& (*)(std::ostream&) ) { return *this; }
36     };
37   }  // namespace detail  // NOLINT [readability/namespace] [5]
38 }  // namespace art
39 
40 #endif  // ART_CMDLINE_DETAIL_CMDLINE_DEBUG_DETAIL_H_
41