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Path expressions - The Rust Reference

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A path used as an expression context denotes either a local variable or an item.

Path expressions that resolve to local or static variables are place expressions, other paths are value expressions.

Using a static mut variable requires an unsafe block.

#![allow(unused)]
fn main() {
mod globals {
    pub static STATIC_VAR: i32 = 5;
    pub static mut STATIC_MUT_VAR: i32 = 7;
}
let local_var = 3;
local_var;
globals::STATIC_VAR;
unsafe { globals::STATIC_MUT_VAR };
let some_constructor = Some::<i32>;
let push_integer = Vec::<i32>::push;
let slice_reverse = <[i32]>::reverse;
}

Evaluation of associated constants is handled the same way as const blocks.

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