基本执行环境(working)
应用程序与基本执行环境(working)
本章最主要的目的是让应用和硬件分离，对访问硬件进行比较初级的抽象。
今天或许短暂，但过去即是永恒。
准备工作
环境
Ubuntu18.04+vscode+docker+qemu5.0.0
toolchain: rustc 1.55.0-nightly
qemu能够模拟一个完整的基于不同CPU的硬件系统，包括处理器、内存及其他外部设备，支持运行完整的操作系统。
这一节使用的都是qemu的User Mode模式，用户态模拟，不是完全的裸机。
老规矩，从”hello，world“开始。
当我们满怀着好奇心在编辑器内键入仅仅数个字节，再经过几行命令编译（编译器）、运行（操作系统），终于在黑洞洞的终端窗...
rustlings-macros
macros1
// macros1.rs
// Make me compile! Execute `rustlings hint macros1` for hints :)
macro_rules! my_macro {
() => {
println!("Check out my macro!");
};
}
fn main() {
my_macro();
}
这个题目的问题是调用宏的时候没加！，现在这样是相当于调用名为my_macro()的函数。只要加个!就能解决。
但是我们也详细说说macro_rules!，这个将来会被淘汰的宏类型。
我们已经用过很多种宏了。但是还没完全探索什么是宏以及它是如何工作的。
宏(Mac...
rustlings-thread
thread1
// threads1.rs
// Make this compile! Execute `rustlings hint threads1` for hints :)
// The idea is the thread spawned on line 22 is completing jobs while the main thread is
// monitoring progress until 10 jobs are completed. Because of the difference between the
// spawned threads' sleep time, and the waiting threads sleep time, when you...
rustlings-迭代器和闭包
iterators1
// iterators1.rs
//
// Make me compile by filling in the `???`s
//
// When performing operations on elements within a collection, iterators are essential.
// This module helps you get familiar with the structure of using an iterator and
// how to go through elements within an iterable collection.
//
// Execute `rustlings hint iterato...
rustlings-智能指针
box1
// box1.rs
//
// At compile time, Rust needs to know how much space a type takes up. This becomes problematic
// for recursive types, where a value can have as part of itself another value of the same type.
// To get around the issue, we can use a `Box` - a smart pointer used to store data on the heap,
// which also allows us to wrap a recu...
rustlings-test
test1
// tests1.rs
// Tests are important to ensure that your code does what you think it should do.
// Tests can be run on this file with the following command:
// rustlings run tests1
// This test has a problem with it -- make the test compile! Make the test
// pass! Make the test fail! Execute `rustlings hint tests1` for hints :)
// I AM NO...
rustlings-traits
traits1
// traits1.rs
// Time to implement some traits!
//
// Your task is to implement the trait
// `AppendBar' for the type `String'.
//
// The trait AppendBar has only one function,
// which appends "Bar" to any object
// implementing this trait.
// I AM NOT DONE
trait AppendBar {
fn append_bar(self) -> Self;
}
impl AppendBar for St...
rustlings-option
option1
// option1.rs
// Make me compile! Execute `rustlings hint option1` for hints
// you can modify anything EXCEPT for this function's sig
fn print_number(maybe_number: Option<u16>) {
println!("printing: {}", maybe_number.unwrap());
}
fn main() {
print_number(13);
print_number(99);
let mut numbers: [Option<u16>...
24 post articles, 3 pages.