rust-clippy/tests/ui/redundant_closure_call_late.rs

// non rustfixable, see redundant_closure_call_fixable.rs

#![warn(clippy::redundant_closure_call)]
#![allow(clippy::needless_late_init)]

fn main() {
    let mut i = 1;

    // don't lint here, the closure is used more than once
    let closure = |i| i + 1;
    i = closure(3);
    i = closure(4);

    // lint here
    let redun_closure = || 1;
    i = redun_closure();
    //~^ ERROR: closure called just once immediately after it was declared
    //~| NOTE: `-D clippy::redundant-closure-call` implied by `-D warnings`

    // shadowed closures are supported, lint here
    let shadowed_closure = || 1;
    i = shadowed_closure();
    //~^ ERROR: closure called just once immediately after it was declared
    let shadowed_closure = || 2;
    i = shadowed_closure();
    //~^ ERROR: closure called just once immediately after it was declared

    // don't lint here
    let shadowed_closure = || 2;
    i = shadowed_closure();
    i = shadowed_closure();

    // Fix FP in #5916
    let mut x;
    let create = || 2 * 2;
    x = create();
    fun(move || {
        x = create();
    })
}

fn fun<T: 'static + FnMut()>(mut f: T) {
    f();
}