r[expr.path]

Path expressions

r[expr.path.syntax]

PathExpression ->
      PathInExpression
    | QualifiedPathInExpression

r[expr.path.intro] A path used as an expression context denotes either a local variable or an item.

r[expr.path.place] Path expressions that resolve to local or static variables are place expressions; other paths are value expressions.

r[expr.path.safety] 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;
}

r[expr.path.const] Evaluation of associated constants is handled the same way as const blocks.