Cpp Timeline

C++: 从 C++11 到 C++26 的演进之路

C++ 从 2011 年开始进入了快速发展的时代，每三年一个新标准，带来了大量现代特性。本文将梳理 C++11 到 C++26 的主要特性和常用特性。

详细指南

• C++11 - 现代 C++ 的开端
• C++14 - 增量改进
• C++17 - 重大更新
• C++20 - 革命性更新
• C++23 - 最新特性
• C++26 - 下一个里程碑

C++11

Core Feature	Library	Concurrency
Move semantics Lambda expressions auto and decltype nullptr Hash Table constexpr override/final Uniform initialization range-based for enum class static_assert Variadic templates Alias templates Delegating constructors Inheriting constructors Rvalue references	Smart pointers std::function std::bind std::unordered_map/set std::array std::tuple std::forward_list std::chrono std::random std::regex	std::thread std::mutex std::atomic std::condition_variable std::future/promise std::async std::lock_guard/unique_lock

C++14

Core Feature	Library	Concurrency
Generic Lambdas Lambda capture initializers Return type deduction Variable templates Binary literals Digit separators [[deprecated]] attribute Relaxed constexpr restrictions	std::make_unique std::integer_sequence std::quoted std::exchange User-defined literals for std::chrono and std::string	std::shared_timed_mutex std::shared_lock

C++17

Core Feature	Library	Concurrency
Structured bindings if and switch init-statements constexpr if Fold expressions Inline variables Class template argument deduction (CTAD) Nested namespaces [[nodiscard]], [[maybe_unused]], [[fallthrough]] UTF-8 character literals	std::filesystem std::optional std::variant std::any std::string_view std::byte std::apply std::invoke std::make_from_tuple std::clamp std::reduce/transform_reduce std::scoped_lock	Parallel algorithms std::shared_mutex

C++20

The Big	Core Feature	Library	Concurrency
Concepts Modules Coroutines Ranges	Three-way comparison (<=>) Designated initializers consteval/constinit range-based for with initializer template parameter list for lambdas [[no_unique_address]] likely/unlikely attributes	std::format std::span std::source_location std::bit_cast std::endian std::make_shared for arrays contains for associative containers starts_with/ends_with for strings	std::jthread std::stop_token Semaphores Barriers Latches Atomic wait/notify std::atomic<std::shared_ptr<T>>

C++23

Core Feature	Library	Concurrency
Deducing this if consteval auto(x) / auto{x} Static operator[] Multidimensional operator[] [[assume]] attribute Literal suffixes for size_t	std::print/println Standard Library Modules (import std) std::expected std::generator std::mdspan std::flat_map/set std::byteswap std::to_underlying std::string::contains	-

C++26

Core Feature	Library	Concurrency
Static reflection Contracts Pack indexing = delete("reason") Structured binding improvements	std::execution / sender-receiver std::simd views::concat std::span::at Saturation arithmetic std::breakpoint	Hazard pointers User-space RCU

日常开发必备

C++11：

• auto - 几乎无处不在
• Lambda 表达式 - 回调和算法
• 智能指针 - 资源管理
• 范围 for 循环 - 遍历容器
• nullptr - 空指针
• override - 虚函数重写

C++14：

• 泛型 Lambda - 更灵活的 lambda
• std::make_unique - 创建 unique_ptr
• 数字分隔符 - 提高可读性

C++17：

• 结构化绑定 - 解构返回值
• std::optional - 可选值
• std::string_view - 避免字符串拷贝
• std::invoke - 统一调用接口
• std::filesystem - 文件系统操作
• [[nodiscard]] - 防止忽略返回值

C++20：

• Concepts - 模板约束
• Ranges - 函数式风格处理序列
• std::format - 格式化输出
• std::span - 数组视图
• contains - 容器查找

C++23：

• std::print / std::println - 简化输出
• std::expected - 错误处理
• std::generator - 生成器

C++26：

• 静态反射 - 编译期类型 introspection
• 契约 - 前置/后置条件与断言
• std::execution / sender-receiver - 统一异步模型
• std::simd - 数据并行

兼容性考虑

• C++11 - 所有现代编译器完全支持
• C++14 - GCC 5+, Clang 3.4+, MSVC 2015+
• C++17 - GCC 7+, Clang 5+, MSVC 2017 15.8+
• C++20 - GCC 10+, Clang 12+, MSVC 2022 16.10+
• C++23 - GCC 13+, Clang 16+, MSVC 2022 17.5+
• C++26 - GCC 15+, Clang 20+, MSVC 2022 17.14+（实验性支持 -std=c++26 / /std:c++latest）