C++ 命名需求： TrivialClock (自 C++11 起)

 

C++

编译器支持

独立和宿主

语言

标准库

标准库头文件

命名需求

特性测试宏 (C++20)

语言支持库

概念库 (C++20)

元编程库 (C++11)

诊断库

通用实用程序库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

并发支持库 (C++11)

执行支持库 (C++26)

技术规范

符号索引

外部库

 

C++ 命名需求

基本 DefaultConstructible MoveConstructible (C++11) CopyConstructible CopyAssignable MoveAssignable (C++11) Destructible 类型属性 ScalarType PODType TriviallyCopyable (C++11) TrivialType (C++11) StandardLayoutType (C++11)   ImplicitLifetimeType 库范围 BooleanTestable EqualityComparable LessThanComparable Swappable ValueSwappable (C++11) NullablePointer (C++11) Hash (C++11) Allocator FunctionObject Callable Predicate BinaryPredicate Compare

Container Container ReversibleContainer AllocatorAwareContainer SequenceContainer ContiguousContainer (C++17) AssociativeContainer UnorderedAssociativeContainer (C++11)   容器元素 DefaultInsertable (C++11) CopyInsertable (C++11) MoveInsertable (C++11) EmplaceConstructible (C++11) Erasable (C++11) Iterator LegacyIterator LegacyInputIterator LegacyOutputIterator LegacyForwardIterator LegacyBidirectionalIterator LegacyRandomAccessIterator LegacyContiguousIterator (C++17) ConstexprIterator (C++20) 流 I/O FormattedInputFunction UnformattedInputFunction FormattedOutputFunction UnformattedOutputFunction 格式化器 BasicFormatter (C++20) Formatter (C++20)

随机数 SeedSequence (C++11) RandomNumberEngine (C++11) RandomNumberDistribution (C++11) UniformRandomBitGenerator (C++11) RandomNumberEngineAdaptor (C++11) 并发 BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11) SharedLockable (C++14) SharedTimedLockable (C++14) Mutex (C++11) TimedMutex (C++11) SharedMutex (C++17) SharedTimedMutex (C++14) 范围 RangeAdaptorObject (C++20) RangeAdaptorClosureObject (C++20) 多维视图 LayoutMapping (C++23) LayoutMappingPolicy (C++23) AccessorPolicy (C++23) 其他 CharTraits RegexTraits (C++11)   BitmaskType LiteralType (C++11) NumericType UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) Clock (C++11) TrivialClock (C++11)

 

The TrivialClock requirements describe the requirements satisfied by several clocks in the chrono 库.

需求

对于类型 TC

• 该类型必须满足 Clock 需求。
• 类型 TC::rep, TC::duration, 和 TC::time_point 满足 EqualityComparable, LessThanComparable, DefaultConstructible, CopyConstructible, CopyAssignable, Destructible(直到 C++17), Swappable, 和 NumericType 的需求。
• 函数 TC::now() 不抛出异常。
• 类型 TC::time_point::clock 递归地满足 TrivialClock 需求。

使用

标准库中的以下类型满足这些需求

• std::chrono::system_clock
• std::chrono::steady_clock
• std::chrono::high_resolution_clock
• std::filesystem::file_time_type::clock
• std::chrono::file_clock