rust/tests/ui/double_const_comparisons.rs

53 lines
1.8 KiB
Rust

#![allow(unused)]
#![warn(clippy::impossible_double_const_comparisons)]
#![warn(clippy::ineffective_double_const_comparisons)]
#![allow(clippy::no_effect)]
#![allow(clippy::short_circuit_statement)]
#![allow(clippy::manual_range_contains)]
const STATUS_BAD_REQUEST: u16 = 400;
const STATUS_SERVER_ERROR: u16 = 500;
fn main() {
let status_code = 500; // Value doesn't matter for the lint
status_code >= 400 && status_code < 500; // Correct
status_code <= 400 && status_code > 500;
status_code > 500 && status_code < 400;
status_code < 500 && status_code > 500;
// More complex expressions
status_code < { 400 } && status_code > { 500 };
status_code < STATUS_BAD_REQUEST && status_code > STATUS_SERVER_ERROR;
status_code <= u16::MIN + 1 && status_code > STATUS_SERVER_ERROR;
status_code < STATUS_SERVER_ERROR && status_code > STATUS_SERVER_ERROR;
// Yoda conditions
500 <= status_code && 600 > status_code; // Correct
500 <= status_code && status_code <= 600; // Correct
500 >= status_code && 600 < status_code; // Incorrect
500 >= status_code && status_code > 600; // Incorrect
// Expressions where one of the sides has no effect
status_code < 200 && status_code <= 299;
status_code > 200 && status_code >= 299;
status_code >= 500 && status_code > 500; // Useless left
status_code > 500 && status_code >= 500; // Useless right
status_code <= 500 && status_code < 500; // Useless left
status_code < 500 && status_code <= 500; // Useless right
// Other types
let name = "Steve";
name < "Jennifer" && name > "Shannon";
let numbers = [1, 2];
numbers < [3, 4] && numbers > [5, 6];
let letter = 'a';
letter < 'b' && letter > 'c';
let area = 42.0;
area < std::f32::consts::E && area > std::f32::consts::PI;
}