通过例子学习Rust

12.2 导入

use语句把一个完整路径绑定到一个新的名字,方便后续使用。

// Bind the `deeply::nested::function` path to `other_function` use deeply::nested::function as other_function; fn function() { println!("called `function()`"); } mod deeply { pub mod nested { pub fn function() { println!("called `deeply::nested::function()`") } } } fn main() { // Easier access to `deeply::nested::function` other_function(); println!("Entering block"); { // This is equivalent to `use deeply::nested::function as function` // This `function` will shadow the outer one use deeply::nested::function; function(); println!("Leaving block"); // `use` bindings have a local scope, in this case the `function` // shadowing is only available in this scope } function(); }