rust-clippy/tests/compile-fail/eq_op.rs

62 lines
2.3 KiB
Rust

#![feature(plugin)]
#![plugin(clippy)]
#[deny(eq_op)]
#[allow(identity_op)]
#[allow(no_effect, unused_variables, unnecessary_operation)]
#[deny(nonminimal_bool)]
fn main() {
// simple values and comparisons
1 == 1; //~ERROR equal expressions
"no" == "no"; //~ERROR equal expressions
// even though I agree that no means no ;-)
false != false; //~ERROR equal expressions
1.5 < 1.5; //~ERROR equal expressions
1u64 >= 1u64; //~ERROR equal expressions
// casts, methods, parentheses
(1 as u64) & (1 as u64); //~ERROR equal expressions
1 ^ ((((((1)))))); //~ERROR equal expressions
// unary and binary operators
(-(2) < -(2)); //~ERROR equal expressions
((1 + 1) & (1 + 1) == (1 + 1) & (1 + 1));
//~^ ERROR equal expressions as operands to `==`
//~^^ ERROR equal expressions as operands to `&`
//~^^^ ERROR equal expressions as operands to `&`
(1 * 2) + (3 * 4) == 1 * 2 + 3 * 4; //~ERROR equal expressions
// various other things
([1] != [1]); //~ERROR equal expressions
((1, 2) != (1, 2)); //~ERROR equal expressions
vec![1, 2, 3] == vec![1, 2, 3]; //no error yet, as we don't match macros
// const folding
1 + 1 == 2; //~ERROR equal expressions
1 - 1 == 0; //~ERROR equal expressions as operands to `==`
//~^ ERROR equal expressions as operands to `-`
1 - 1; //~ERROR equal expressions
1 / 1; //~ERROR equal expressions
true && true; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
true || true; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
let a: u32 = unimplemented!();
let b: u32 = unimplemented!();
a == b && b == a; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
a != b && b != a; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
a < b && b > a; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
a <= b && b >= a; //~ERROR equal expressions
//~|ERROR this boolean expression can be simplified
let mut a = vec![1];
a == a; //~ERROR equal expressions
2*a.len() == 2*a.len(); // ok, functions
a.pop() == a.pop(); // ok, functions
}