Advantages  Replace header files  Modules explicitly state what should be exported (e.g. classes, functions, …)  Separation into module interface files and module implementation files is possible but not Improves build throughput; will be processed only once  Comparable to precompiled header files (PCH)  Custom headers can also be made importable, but how to is compiler dependent “How C++20  |13 Ranges  Example of chaining views: vector data { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; auto result { data | views::filter([](const auto& value) { return value % 2 == 0; })/* 2 4 6 8 10 */ |

h>|lib*|share)/*/cmake/ • 其中 是变量 ${CMAKE_PREFIX_PATH} ， Windows 平台默认为 C:/Program Files 。 • 是你在 find_package( REQUIRED) 命令中指定的包名。 • 是系统的架构名。 https://zhuanlan.zhihu 会依次搜索： • C:/Program Files/Qt5Config.cmake • C:/Program Files/cmake/Qt5Config.cmake • C:/Program Files/Qt5/Qt5Config.cmake • C:/Program Files/Qt5/cmake/Qt5Config.cmake • C:/Program Files/Qt5/lib/cmake/Qt5/Qt5Config C:/Program Files/Qt5/lib/x86_64-windows-gnu/cmake/Qt5/Qt5Config.cmake • C:/Program Files/Qt5/share/cmake/Qt5/Qt5Config.cmake • C:/Program Files/Qt5/lib/Qt5/Qt5Config.cmake • C:/Program Files/Qt5/lib/

什么是 waPC? WASM 外部函数 接口 FFI Input type Return type Platform 底层 I32 I32 Unknown waPC &[u8] Result,error > Linux x86_64, macOS x86_64 ,Wi ndows x86_64, … cargo build —target wasm- unknown-unknown 也可返回请求 host Invoke(ctx,operation,payload) WAPC 流程 • Uses Length of response and error to return result res,err:= Invoke… WAPC 流程 #[no_mangle] pub fn wapc_init() { wapc::register_function("ping", will not implicate the others • Can be compiled from many programming language • Store wasm files prevent maintenance issues API 测试 - Wasm Mock Server 用 rust, 好处多 软件测试工具 • Url param ?loop=2

Examples - clickhouse-operator docs ClickHouse operator – начало • Хочу во всем разобраться Get files from github repo: git clone https://github.com/Altinity/clickhouse-operator Install the operator: docs/examples/demo-01.yaml -n demo clickhouseinstallation.clickhouse.altinity.com/demo-01 created 3. RESULT $ kubectl get all -n demo NAME READY STATUS pod/chi-demo-01-demo-0-0-0

Visual Studio Build Debug Edit Developer inner-loop Developer inner-loop Build Debug Edit Find in Files 1.8x faster 1 2 0 5 10 15 20 25 30 35 40 45 50 47 27 Series1 Open C++ File 2.4x faster 1 2 0 0.5 ms/18xfaster Performance of Visual Studio Developer inner-loop Build Debug Edit Find in Files 1.8x faster Open C++ File 2.4x faster IntelliSense Ready* 1.9x faster *) Colorization + Member Performance of Visual Studio At CppCon last year Developer inner-loop Build Debug Edit Find in Files 1.8x faster Open C++ File 2.4x faster IntelliSense Ready* 1.9x faster *) Colorization + Member

中添加一个可执行文件作为构建目标 另一种方式：先创建目标，稍后再添加源文件 如果有多个源文件呢？ 逐个添加即可 使用变量来存储 建议把头文件也加上，这样在 VS 里可以出现在“ Header Files” 一栏 使用 GLOB 自动查找当前目录下指定扩展名的文件，实现批量添加源文件 启用 CONFIGURE_DEPENDS 选项，当添加新文件时，自动更新变量 如果源码放在子文件夹里怎么办？ Python 的 os.path.join(x, ‘bin’) 一样的效果。 毕竟大多数操作系统都是 Unix-like 嘛……就 Windows 喜欢搞特殊 。 cd /d C:\\Program\ Files\ \(x86\)\\Microsoft\ Visual\ Studio\\2019\\ 怎么路径里动不动夹杂几个转移符、空格、特殊符号？这谁顶得住啊 。 高情商： Windows 是最适合练习你 没加引号会怎样？会把列表里的字符串当成他的关键字 结论：除非确实需要列表，建议始终在你不确定的地方加上引号，例如： set(sources “main.cpp” “mylib.cpp” “C:/Program Files/a.cpp”) message(“${sources}”) 第 7 章：变量与缓存 重复执行 cmake -B build 会有什么区别？ 可以看到第二次的输出少了很多，这是因为 CMake

writes 43  C++23 mandates that whitespace after a \ line continuation character is stripped, so result should be 1 Extra space behind \C++23 Standard Library36 Agenda  C++23 Core Language  Explicit : std::string GeneratePattern(const std::string& pattern, size_t count) { std::string result; result.reserve(pattern.size() * count); for (size_t i = 0; i < count; i++) { // Not optimal: // - Updates size and checks for potential resize 'count' times result.append(pattern); } return result; }59 basic_string::resize_and_overwrite()  E.g.: std::string GeneratePattern(const

STD::EXECUTION Sender adaptors Returns a sender that… then(sender, fn) → sender … transforms the result value of the operation with a function. upon_[error|done](sender, fn) → sender … transforms the the error and done signals with a function. let_[value|…](sender, fn) → sender … passes the result of input sender to function, which returns new sender. when_all(senders...) → sender … completes when ) by invoking the callable and // passing the result to the inner receiver: template requires ex::receiver_ofresult_t> void set_value(As&&... as) && {

ratio<1, 60>; // 1/60 using r2 = ratio<1, 30>; // 1/30 using result = ratio_add::type; cout << format("sum = {}/{}", result::num, result::den);// 1/20  Comparisons with ratio_equal, ratio_not_equal 2020y / June / 22d } + 9h + 35min + 10s }; auto d3 { d2 + years { 1 } }; // Add 1 year to d2  Result d2 = 2020-06-22 09:35:10 d3 = 2021-06-22 15:24:22 ⚠ Adding 1 year does not add: 86,400 * 1 year. year_month_day ymd3{ ymd2 + years{ 1 } }; auto d3{ sys_days{ ymd3 } + d2_seconds };  Result t2 = 2020-06-22 09:35:10 t3 = 2021-06-22 09:35:1038 Agenda  Compile-Time Rational Numbers 

year y{2021}; std::cout << y << "\n"; month m{October}; auto result = m + months{3}; std::cout << result << "\n"; } Output: 2021 Jan12 Some examples: Simple Calendrical Types using namespace std::chrono; int main() { weekday wd{Thursday}; auto result = wd + days{4}; std::cout << result << "\n"; weekday sun1{0}; weekday sun2{7}; std::cout << sun1 <<