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
27namespace 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