Rust by Example

The use declaration

The use declaration can be used to bind a full path to a new name, for easier access. It is often used like this:

use crate::deeply::nested::{

my_first_function,

my_second_function,

AndATraitType

};

fn main() {

my_first_function();

}

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You can use the as keyword to bind imports to a different name:

// 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 crate::deeply::nested::function;

// `use` bindings have a local scope. In this case, the

// shadowing of `function()` is only in this block.

function();

println!("Leaving block");

}

function();

}

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