rust/tests/compile-fail/booleans.rs

85 lines
3.3 KiB
Rust

#![feature(plugin)]
#![plugin(clippy)]
#![deny(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; //~ ERROR this boolean expression contains a logic bug
//|~ HELP for further information visit
//|~ HELP this expression can be optimized out
//|~ HELP it would look like the following
//|~ SUGGESTION let _ = a;
let _ = !(a && b);
let _ = !true; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = false;
let _ = !false; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = true;
let _ = !!a; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = a;
let _ = false && a; //~ ERROR this boolean expression contains a logic bug
//|~ HELP for further information visit
//|~ HELP this expression can be optimized out
//|~ HELP it would look like the following
//|~ SUGGESTION let _ = false;
let _ = false || a; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = 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); //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = !b || a;
}
#[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; //~ ERROR this boolean expression contains a logic bug
//|~ HELP for further information visit
//|~ HELP this expression can be optimized out
//|~ HELP it would look like the following
//|~ SUGGESTION let _ = false;
let _ = a == b && c == 5 && a == b; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = c == 5 && a == b;
let _ = a == b && c == 5 && b == a; //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = c == 5 && a == b;
let _ = a < b && a >= b; //~ ERROR this boolean expression contains a logic bug
//|~ HELP for further information visit
//|~ HELP this expression can be optimized out
//|~ HELP it would look like the following
//|~ SUGGESTION let _ = false;
let _ = a > b && a <= b; //~ ERROR this boolean expression contains a logic bug
//|~ HELP for further information visit
//|~ HELP this expression can be optimized out
//|~ HELP it would look like the following
//|~ SUGGESTION let _ = false;
let _ = a > b && a == b;
let _ = a != b || !(a != b || c == d); //~ ERROR this boolean expression can be simplified
//|~ HELP for further information visit
//|~ SUGGESTION let _ = !c == d || a != b;
//|~ SUGGESTION let _ = !(!a != b && c == d);
}