52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
#![feature(plugin)]
|
|
#![plugin(clippy)]
|
|
#![deny(needless_bool)]
|
|
|
|
#[allow(if_same_then_else)]
|
|
fn main() {
|
|
let x = true;
|
|
if x { true } else { true }; //~ERROR this if-then-else expression will always return true
|
|
if x { false } else { false }; //~ERROR this if-then-else expression will always return false
|
|
if x { true } else { false };
|
|
//~^ ERROR this if-then-else expression returns a bool literal
|
|
//~| HELP you can reduce it to
|
|
//~| SUGGESTION `x`
|
|
if x { false } else { true };
|
|
//~^ ERROR this if-then-else expression returns a bool literal
|
|
//~| HELP you can reduce it to
|
|
//~| SUGGESTION `!x`
|
|
if x { x } else { false }; // would also be questionable, but we don't catch this yet
|
|
bool_ret(x);
|
|
bool_ret2(x);
|
|
bool_ret3(x);
|
|
bool_ret4(x);
|
|
}
|
|
|
|
#[allow(if_same_then_else, needless_return)]
|
|
fn bool_ret(x: bool) -> bool {
|
|
if x { return true } else { return true };
|
|
//~^ ERROR this if-then-else expression will always return true
|
|
}
|
|
|
|
#[allow(if_same_then_else, needless_return)]
|
|
fn bool_ret2(x: bool) -> bool {
|
|
if x { return false } else { return false };
|
|
//~^ ERROR this if-then-else expression will always return false
|
|
}
|
|
|
|
#[allow(needless_return)]
|
|
fn bool_ret3(x: bool) -> bool {
|
|
if x { return true } else { return false };
|
|
//~^ ERROR this if-then-else expression returns a bool literal
|
|
//~| HELP you can reduce it to
|
|
//~| SUGGESTION `return x`
|
|
}
|
|
|
|
#[allow(needless_return)]
|
|
fn bool_ret4(x: bool) -> bool {
|
|
if x { return false } else { return true };
|
|
//~^ ERROR this if-then-else expression returns a bool literal
|
|
//~| HELP you can reduce it to
|
|
//~| SUGGESTION `return !x`
|
|
}
|