Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous

specifier declares a function as being a kernel. Such a function is: • Executed on the device, • Callable from the host. The __device__ execution space specifier declares a function that is: • Executed nvidia.com/cuda/cuda-c-programming-guide/ index.html#function-declaration-specifiers 36 |The __host__ execution space specifier declares a function that is: • Executed on the host, • Callable from the declare a function with only the __host__ execution space specifier or to declare it without any of the __host__, __device__, or __global__ execution space specifier; in either case the function is compiled

with a function. upon_[error|done](sender, fn) → sender … transforms the error and done signals with a function. let_[value|…](sender, fn) → sender … passes the result of input sender to function, which std::move(work) ).value(); }50 SENDER/RECEIVER AND COROUTINES By returning a sender, an async function puts the choice of whether to use coroutines or not in the hands of the caller.51 COMING UP treated like a black box. goto is an unstructured control flow construct conditional loop function call goto59 FIRE-AND-FORGET TASK MODELS ARE UNSTRUCTURED Fire-and-forget work is like goto.

wapc::register_function("ping", ping); } fn ping(msg: &[u8]) -> wapc::CallResult { …. Ok(msg.to_vec()) } waPC Guest Rust waPC • Use wapc_init to register function • Register_function can only be be used inside WAPC_init • Register_function cannot be called inside ping • _start is meant to support tinygo’s wasm • waPC host will still run both "wapc_init" and "_start" during intialization intialization waPC Guest Rust waPC • Use wapc_init to register function • _start also can • Util Lib uses wapc_init, users build on top of ”_start” extern crate wapc_guest as guest; extern crate Regex;

Tristan Brindle Thursday, September 17 • 12:00coroutines15 Coroutines  What’s a coroutine?  A function,  with one of the following:  co_await: suspends coroutine while waiting for another computation typename V::value_type; T x { }; T::static_function(); // ... };  With C++20: [](const vector& vec) { T x { }; T::static_function(); // ... };29 Templated Lambda Expressions std::atomic  Wait/block for an atomic object to change its value, notified by a notification function  Can be more performant than polling  Methods  wait()  notify_one()  notify_all()45 std::atomic_ref

Run down of some approaches Just be like C? – post-1972 Common Object Model (COM) – 1993 Foreign function interface (libffi) – 1996 Simplified Wrapper and Interface Generator (SWIG) – 1996 JVM – Java Native dev- >get_data_from(); return d.a + d.b; The get_data_from() function returns the struct in registers, but the get_data_from() member function returns in caller provided memory. This is often unexpected int b; }; /* Get data from device ‘dev’. */ data_t get_data_from(size_t dev); How does this function fail? C++ exceptions have no universal binary contract. Meaning the consumer may not be prepared

layouts with one GridLayout. Loops • Beware of function and memory allocations inside of loops. You see this as a standard pattern. function loopFunction () { var val = 0; for (var i=0;i<100000;i++) i=0;i<100000;i++) { doSomething( () => { val++; } ); } } Loops • Proper way function loops() { var val = 0, fun = function() { val++; }; for (var i=0;i<100000;i++) { doSomething(fun);

为了灵活性，可以用 std::function 容器。 • 只需在后面尖括号里写函数的返回类型和 参数列表即可，比如： • std::function; 如何避免用模板参数 2 ：无捕获的 lambda 可以传为函数指针 • 另外，如果你的 lambda 没有捕获任何局 部变量，也就是 [] ，那么不需要用 std::function 作为参数：用 template 然后 Func const & 做类型。 2. lambda 作为返回值：用 auto 做类型。 3. 牺牲性能但存储方便： std::function 容器。 4. lambda 作为参数：通常用 [&] 存储引用。 5. lambda 作为返回值：总是用 [=] 存储值。 • 其实 lambda 还有更多语法，比如 mutable ，

这个文件。 • 这样你可以在 XXX.cmake 里写一些你常用的函数，宏，变量等。 macro 和 function 的区别 • macro 相当于直接把代码粘贴过去，直接访问调用者的作用域。这里写的相对路径 include 和 src ，是基于调用者所在路径。 • function 则是会创建一个闭包，优先访问定义者的作用域。这里写的相对路径 include 和 src ，则是基于定义者所在路径。 ，则是基于定义者所在路径。 https://cmake.org/cmake/help/latest/command/function.html https://cmake.org/cmake/help/latest/command/macro.html include 和 add_subdirectory 的区别 • include 相当于直接把代码粘贴过去，直接访问调用者的作用域。这里创建的变量和外面共 外面共 享，直接 set(key val) 则调用者也有 ${key} 这个变量了。 • function 中则是基于定义者所在路径，优先访问定义者的作用域。这里需要 set(key val PARENT_SCOPE) 才能修改到外面的变量。 第二章：第三方库 / 依赖项配置 用 find_package 寻找系统中安装的第三方库并链接他们 find_package 命令 • 常用参数列表一览：

to use Rust to provide high performance 2); Photo / image / chart Rust FFI Rust FFI (Foreign Function Interface) refers to the ability of Rust programming language to interface with code written in IOS - Rust targets for IOS - Build the static universal library for different target - Call the function on the swift code 利用 Rust 重塑移动应用开发 Photo / image / chart Rust 在 Keystone 业务上的实践 Rust Crypto as linked library into the application Protocol Buffers 利用 Rust 重塑移动应用开发 Directly expose the function to IOS/Android? - Hard to maintain - Hard to define the return value - Hard to process the error