在你克服了上面的所有的困难之后,你会发现Clipy随着你的更改中断了;它依赖于fmt::Arguments的实现细节,因为它是在宏展开之后才进行代码检查的。 所以,即使是对fmt::Arguments的微小改动,也不仅涉及修改标准库,还要求你精通Rustc内建宏、Rustc诊断、引导和Clippy的内部细节。你的改动将同时触及许多不同的部分,这些部...
fmt::Arguments则由内建的format_args!()宏产生,这是一个能够读懂Rust的字符串格式化语法(使用{}作为占位符等)的宏。生成的fmt::Arguments对象既代表字符串模板,即带有占位符的(解析后的)格式字符串(在本例中为:"Hello, <argument 1 here>\n"),又代表对参数的引用(在本例中仅有一个:&name)。 因为它是...
(s,format!("hello {}","world")); 由纯净天空筛选整理自rust-lang.orgMacro std::format_args。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。
在 rust 中，我们一开始就在使用宏，例如 println!, vec!, assert_eq! 等。看起来宏和函数在使用时...
这是一个已知问题，请参阅#92698。现在我们不能在Rust中这样做。标签：Cannot use format_args! due ...
Checking in from the @rust-lang/compiler meeting -- can someone summarize what action on our part is needed, if any? Or is that still undetermined? Contributor arielb1 commented Oct 5, 2017 @japaric I think this just used to work by accident before. Could you please open a PR for fi...
Trying to display most types causes a segmentation fault at run time when compiled in debug mode for x32 ABI Example: echo 'fn main() { println!("{}", 0); }' | rustc --target x86_64-unknown-linux-gnux32 - ./rust_out Segmentation fault (c...
Rust format_args用法及代码示例 本文简要介绍rust语言中Macro core::format_args的用法。 用法 macro_rules!format_args{ ($fmt : expr) => { ... }; ($fmt : expr, $($args : tt) *) => { ... }; } 为其他字符串格式化宏构造参数。
This pull request adds a base for reusing the rustc_format_parser crate to parse the format strings in format_args!() invocations. There are still a lot of things missing, and the build system stuf...
and all involve a trade off between compile time, code size, runtime performance, and implementation complexity. It's also very tricky to make these tradeoffs for many different use cases at once, as the ways in which formatting is used in a program differs vastly per type of Rust program...