互斥功能

Rust 中检查互斥功能的宏

它包含 none_or_one_of 和 exactly_one_of 宏。

两个宏都检查 Rust 中的互斥功能，但 none_or_one_of 允许不启用任何功能，而 exactly_one_of 则要求恰好启用一个功能。

用法

none_or_one_of

使用您想要互斥的功能的列表调用它

use mutually_exclusive_features::none_or_one_of;
none_or_one_of!("feature1", "feature2", "feature3");

这将生成以下代码

#[cfg(all(feature="feature1", feature="feature2"))]
compile_error!("The `feature1` and `feature2` features are mutually exclusive and cannot be enabled at the same time!");

#[cfg(all(feature="feature1", feature="feature3"))]
compile_error!("The `feature1` and `feature3` features are mutually exclusive and cannot be enabled at the same time!");

#[cfg(all(feature="feature2", feature="feature3"))]
compile_error!("The `feature2` and `feature3` features are mutually exclusive and cannot be enabled at the same time!");

exactly_one_of

与上面相同，但要求恰好启用一个功能

use mutually_exclusive_features::exactly_one_of;
exactly_one_of!("feature1", "feature2", "feature3");

这将生成以下代码

#[cfg(all(feature="feature1", feature="feature2"))]
compile_error!("The `feature1` and `feature2` features are mutually exclusive and cannot be enabled at the same time!");

#[cfg(all(feature="feature1", feature="feature3"))]
compile_error!("The `feature1` and `feature3` features are mutually exclusive and cannot be enabled at the same time!");

#[cfg(all(feature="feature2", feature="feature3"))]
compile_error!("The `feature2` and `feature3` features are mutually exclusive and cannot be enabled at the same time!");

#[cfg(not(any(feature="feature1", feature="feature2", feature="feature3")))]
compile_error!("You must enable exactly one of `feature1`, `feature2`, `feature3` features!");