在Rust源代码中,文件rust/src/tools/rustfmt/src/parse/macros/cfg_if.rs的作用是为了解析和处理Rust宏中的cfg_if!宏。 Rust中的cfg_if!宏允许在编译时根据不同的条件选择不同的代码路径。它类似于条件编译指令,但更强大和灵活。cfg_if!宏接受一个cfg标识符和对应的代码块,根据当前编译环境的配置选择性地编译...
Registry index forhttp://crates.io cfg-if[87] A if/elif-like macro for Rust #[cfg] statements 这是一个名为cfg-if的宏,用于根据多个参数的条件定义项目。它的结构类似于if-else链,第一个匹配的分支会被生成。这个宏可以帮助在Rust中根据不同条件定义函数或代码块,使代码更具灵活性。它的许可证包括Ap...
它实现了Visittrait,用于遍历语法树中的模块项。 CfgIfVisitor<'a>: 这是一个泛型结构体,实现了Visittrait,用于访问和处理代码中的条件编译指令(cfg_if)。它主要用于查找和处理#[cfg]和cfg!宏,以及它们的参数。 PathVisitor: 这个结构体实现了Visittrait,用于访问和处理代码中的路径(path)。路径是Rust中用于表示...
("cargo:rerun-if-changed=sample.c"); cc::Build::new() .file("sample.c") .shared_flag(true) .compile("sample.so"); // 参考 https://doc.rust-lang.org/cargo/reference/build-scripts.html println!("cargo:rustc-link-lib=sample.so"); println!("cargo:rerun-if-changed=sample.h"); l...
Compiling libc v0.2.119Compiling cfg-ifv1.0.0Compiling ppv-lite86 v0.2.16Compiling getrandom v0.2.5Compiling rand_core v0.6.3Compiling rand_chacha v0.3.1Compiling rand v0.8.5Compiling demo1 v0.1.0(/Users/luyiyi/rustProj/demo1)Finished dev[unoptimized+debuginfo]target(s)in4m 46s ...
"cfg-if", "libc", "redox_syscall", "winapi 0.3.8", ] [[package]] name = "flate2" version = "1.0.13" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6bd6d6f4752952feb71363cffc9ebac9411b75b87c6ab6058c40c8900cf43c0f" dependencies ...
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At this time, there is no firm commitment to support a version older than what's required by Firefox, and there is no commitment to treat MSRV changes as semver-breaking, because this crate depends oncfg-if, which doesn't appear to treat MSRV changes as semver-breaking, so it would be...
#[cfg(feature = "tokio_rt")] pub async fn call_async(&self, value: Result) -> Result { let (sender, receiver) = tokio::sync::oneshot::channel::>(); self.handle.with_read_aborted(|aborted| { if aborted { return Err(crate::Error::from_status(Status::Closing)); ...
Debug)]structQueryConfig{query_file:String,query_str:String,}implQueryConfig{// 实现 create 方法,主要提供参数验证,生成配置对象fncreate()->Result<QueryConfig,&'staticstr>{letargs:Vec<String>=env::args().collect();// 做一个验证,检查一下args 的参数个数应该恰巧 = 3 过长或者过短都有问题if...