高级类型(types): 深入的了解新类型模式(newtype pattern)、类型别名(type aliases)、绝不类型(thenever type)、动态大小类型(dynamically sized types)。 高级函数/闭包:函数指针(function pointer)和返回闭包(return closures)。 宏(macro): 一种定义代码的方法,这些方法会在编译的时候定义更多的代码(ways to defi...
fn 类型就是 “函数指针(function pointer)”fn add_one(x: i32) -> i32 { x + 1 } fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 { f(arg) + f(arg) } fn main() { let answer = do_twice(add_one, 5); println!("The answer is: {}", answer); } 函数...
_1 = (const hello as fn()) (ReifyFnPointer); //等价于 _1 = cast(hello, fn(), ReifyFnPointer); 将hello转换为fn()类型,转换方式是ReifyFnPointer。 同样,可以看到,用于将未捕获闭包转换为函数指针类型的转换方式是ClosureFnPointer。用于将safe的普通函数指针转成unsafe函数指针类型的UnsafeFnPointer。
pub fnmy_app_receive_string_and_return_string(s:String)->String{}pub fnmy_app_receive_str_and_return_string(s:&str)->String{}pub fnmy_app_receive_str_and_return_str(s:&str)->&str{}pub unsafe fn my_app_receive_string_and_return_str<'a>(s: String) -> (&'a str,*constu8,usi...
);// all iXX and uXX, usize/isize, fXX implement Copy trait is_copy::<i8>(); is_copy::(); is_copy::(); is_copy::<usize>();// function (actually a pointer) is Copy is_copy::<fn()>();// raw pointer is Copy is_copy::<*constString>(); is_copy...
Shopify Function 是基于 Rust 和 WebAssembly 实现的。Rust 在 Shopify 公司的应用主要是为了 WebAssembly for Web Side 服务。Rust 在高科技和工业领域中的采用案例 前文提到过,由 Ferrous Systems 公司联合 AdaCore 共同创建的 Ferrocene语言规范(FLS)已经正式发布。该规范主要用于 Ferrous Systems 和 Adacore 合作...
();// raw pointer is Copyis_copy::<*constString>();is_copy::<*mut String>();// immutable reference is Copyis_copy::<&[Vec<u8>]>();is_copy::<&String>();// array/tuple with values which is Copy is Copyis_copy::<[u8;4]>();is_copy::<(&str,&str)>();}fntypes_not_...
(pointer: usize, length: usize) -> &'static str { // 使用裸指针需要 `unsafe{}` 语句块 unsafe { from_utf8_unchecked(from_raw_parts(pointer as *const u8, length)) } } fn main() { let (pointer, length) = get_memory_location(); let message = get_str_at_location(pointer, length...
fn get_str_at_location(pointer: usize, length: usize) -> &'static str { unsafe { from_utf8_unchecked(from_raw_parts(pointer as *const u8, length)) } } ``` 无界生命周期,这在前三本参考资料中均有提到: ```rust fn f<'a, T>(x: *const T) -> &'a T { ...
brendanzab/gl-rs - An OpenGL function pointer loader glium/glium - safe OpenGL wrapper. glutin - Alternative to GLFW Kiss3d - draw simple geometric figures and play with them with one-liners PistonDevelopers/glfw-rs - GLFW3 bindings and idiomatic wrapper PDF bastibense/libharu_ng [libharu_...