crate_visibility_modifier - The Rust Unstable Book

# `crate_visibility_modifier`

The tracking issue for this feature is: #53120

The `crate_visibility_modifier` feature allows the `crate` keyword to be used as a visibility modifier synonymous to `pub(crate)`, indicating that a type (function, &c.) is to be visible to the entire enclosing crate, but not to other crates.

    # #![allow(unused_variables)]
    #![feature(crate_visibility_modifier)]

    #fn main() {
    crate struct Foo {
        bar: usize,
    }
    #}