rust/tests/ui/booleans.rs

#![warn(nonminimal_bool, logic_bug)]

#[allow(unused, many_single_char_names)]
fn main() {
    let a: bool = unimplemented!();
    let b: bool = unimplemented!();
    let c: bool = unimplemented!();
    let d: bool = unimplemented!();
    let e: bool = unimplemented!();
    let _ = a && b || a;
    let _ = !(a && b);
    let _ = !true;
    let _ = !false;
    let _ = !!a;
    let _ = false && a;
    let _ = false || a;
    // don't lint on cfgs
    let _ = cfg!(you_shall_not_not_pass) && a;
    let _ = a || !b || !c || !d || !e;
    let _ = !(a && b || c);
    let _ = !(!a && b);
}

#[allow(unused, many_single_char_names)]
fn equality_stuff() {
    let a: i32 = unimplemented!();
    let b: i32 = unimplemented!();
    let c: i32 = unimplemented!();
    let d: i32 = unimplemented!();
    let e: i32 = unimplemented!();
    let _ = a == b && a != b;
    let _ = a == b && c == 5 && a == b;
    let _ = a == b && c == 5 && b == a;
    let _ = a < b && a >= b;
    let _ = a > b && a <= b;
    let _ = a > b && a == b;
    let _ = a != b || !(a != b || c == d);
}

#[allow(unused, many_single_char_names)]
fn methods_with_negation() {
    let a: Option<i32> = unimplemented!();
    let b: Result<i32, i32> = unimplemented!();
    let _ = a.is_some();
    let _ = !a.is_some();
    let _ = a.is_none();
    let _ = !a.is_none();
    let _ = b.is_err();
    let _ = !b.is_err();
    let _ = b.is_ok();
    let _ = !b.is_ok();
    let c = false;
    let _ = !(a.is_some() && !c);
    let _ = !(!c ^ c) || !a.is_some();
    let _ = (!c ^ c) || !a.is_some();
    let _ = !c ^ c || !a.is_some();
}