1 // 2 // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021 3 // 4 // Distributed under the Boost Software License, Version 1.0. (See accompanying 5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 // 7 #pragma once 8 9 #include "td/utils/common.h" 10 #include "td/utils/StringBuilder.h" 11 12 #include <functional> 13 #include <type_traits> 14 15 namespace td { 16 17 class FileSourceId { 18 int32 id = 0; 19 20 public: 21 FileSourceId() = default; 22 FileSourceId(int32 file_source_id)23 explicit FileSourceId(int32 file_source_id) : id(file_source_id) { 24 } 25 template <class T1, typename = std::enable_if_t<std::is_convertible<T1, int32>::value>> 26 FileSourceId(T1 file_source_id) = delete; 27 is_valid()28 bool is_valid() const { 29 return id > 0; 30 } 31 get()32 int32 get() const { 33 return id; 34 } 35 36 bool operator<(const FileSourceId &other) const { 37 return id < other.id; 38 } 39 40 bool operator==(const FileSourceId &other) const { 41 return id == other.id; 42 } 43 44 bool operator!=(const FileSourceId &other) const { 45 return id != other.id; 46 } 47 }; 48 49 struct FileSourceIdHash { operatorFileSourceIdHash50 std::size_t operator()(FileSourceId file_source_id) const { 51 return std::hash<int32>()(file_source_id.get()); 52 } 53 }; 54 55 inline StringBuilder &operator<<(StringBuilder &string_builder, FileSourceId file_source_id) { 56 return string_builder << "FileSourceId(" << file_source_id.get() << ")"; 57 } 58 59 } // namespace td 60