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...
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 ...
它们有时也被称为 “macros by example”、“macro_rules!宏” 或者就是 “macros”。声明式宏写起来和 Rust 的 match 语法比较像。在第六章里讲到,match 语法是一种流程控制语法,接收一个表达式,然后和结果进行模式匹配,然后执行匹配到结果的代码。宏也会做类似的比较:在这种情况下,传入的参数是 rust 的合法...
因此,思路介绍 是为那些只希望声明宏系统作为一个整体得到解释的人而设计的,而 实践介绍 则指导人们通过实现单个宏。在这两个介绍之后,本章还提供了一些常规且有用的 模式 和构件,用于创建功能丰富的声明宏。关于声明宏的其他资源:Rust Book 的宏章节,这是一个更平易近人的高级解释 Reference macros-by-example ...
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,但是返回一个 String 类...
macros How it works Submit PR(Pull Requests) Changelog Roadmap Ask AI For Help(AI帮助) 联系方式/捐赠,或 rb 点star WebSite|Showcase|Example a compile-time code generation ORM that balances ease of writing with performance and robustness ...
Tracking issue for declarative macros 2.0 (aka macro aka decl_macro aka macros-by-example). RFC: https://github.com/rust-lang/rfcs/blob/master/text/1584-macros.md RFC PR: rust-lang/rfcs#1584 cc @rust-lang/compiler About tracking issues Tracking issues are used to record the overall progr...
Configurations This extension is configured using a jsonc file. You can open this configuration file using the command:CocConfig, and it is typically located at$HOME/.config/nvim/coc-settings.json. Commands You can use these commands by:CocCommand XYZ. ...
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 ...
ICE: `called Result::unwrap() on an Err value: ParseIntError { kind: PosOverflow }` in `rustc_builtin_macros/src/format_foreign.rs` #137580 commented on Mar 9, 2025 • 0 new comments internal compiler error: two identical projections #137467 commented on Mar 9, 2025 • 0 ne...