更详细的可以参考https://doc.rust-lang.org/reference/macros-by-example.html这里直接给出了过程宏定义的文法 每个过程宏都有一个名称, 以及若干个规则组成, 每个规则都是一个模式和一个展开体, 当宏被调用时, 会依次匹配规则, 如果匹配成功, 就会展开对应的展开体. 当调用过程宏时, Rust的宏处理器会按照名...
这种声明式定义的语法来定义的。这其实就是声明式宏 也叫做宏,更原味的叫法是macros by example. 声明式宏,我会在下篇文章写怎么使用,怎么自定义一个自己的宏。
Macros can also take arguments, which allows us to customize the code that it generates based on different inputs. For example, here's a macro that defines a function to print a custom message: // A macro named `print_message`macro_rules!print_message {// Match rule that takes an argum...
定义新宏有两种方式: 声明宏(Macros by Example)以更高级别的声明性的方式定义了一套新句法规则。 过程宏(Procedural Macros)可用于实现自定义派生。 Rust提供了很多标准宏,如: println! 宏 - 用于打印输出到控制台,是 Rust 中最常用的宏之一。 format! 宏 - 用于创建一个格式化的字符串,与 println! 类似,但...
For example, fn main() { print!("Rust is fun! "); print!("I love Rust programming."); } Output Rust is fun! I love Rust programming. You can see we have used two print! macros to print two different strings. However, both the strings are printed in the same line. To separate...
Theoriginal Little Book of Rust Macroshas helped me immensely with understandingMacros by Examplestyle macros while I was still learning the language. Unfortunately, the original book hasn't been updated since April of 2016, while the Rust language as well as its macro-system keeps evolving. Whic...
"Macros By Example" - The Rust Reference To use this crate, you do not need to know how macros are defined. Trait In Rust, traits are a way of defining a generalized property. They should be thought of expressing what a type is capable of doing. For example: if a type implementsInto...
最近在跟风玩 AI ,包括 ChatGPT 和 Midjourney,体验一下传说中年薪百万美元的 Prompt 工程师是什么感觉。直到这周,我发现 GPT4 对于 Rust 代码的辅助学习非常有帮助。于是,我就尝试打造这个 Rust 辅助学习系统,我将其命名为 RustChat[2] ,在 GitHub 上创建了仓库...
在Rust源代码中,rust/library/core/src/macros/mod.rs这个文件的作用是定义了一些重要的宏(macros),这些宏在Rust语言的编译器中被广泛地使用。 宏是一种类似于函数的代码抽象机制,它允许程序员在编译时进行代码的生成和转换,以及执行预定义的模式匹配和操作。宏通过以macro_rules!关键字开头,并设置模式匹配规则来定...
Macros Multiple pattern rules Repetitions Optional quantifier Summary Starting with SDL Understanding Rust crates Installing SDL2 Installing SDL2 on Linux Installing SDL2 on Mac Installing SDL2 on Windows Windows with Build Script Windows (MinGW) Windows (MSVC) Setting up your Rust project Cargo and ...