48 lines
1.1 KiB
Rust
48 lines
1.1 KiB
Rust
// > Suggest `return`ing tail expressions that match return type
|
|
// >
|
|
// > Some newcomers are confused by the behavior of tail expressions,
|
|
// > interpreting that "leaving out the `;` makes it the return value".
|
|
// > To help them go in the right direction, suggest using `return` instead
|
|
// > when applicable.
|
|
// (original commit description for this test)
|
|
//
|
|
// This test was amended to also serve as a regression test for #92308, where
|
|
// this suggestion would not trigger with async functions.
|
|
//
|
|
// edition:2018
|
|
|
|
fn main() {
|
|
}
|
|
|
|
fn foo(x: bool) -> Result<f64, i32> {
|
|
if x {
|
|
Err(42) //~ ERROR mismatched types
|
|
//| HELP you might have meant to return this value
|
|
}
|
|
Ok(42.0)
|
|
}
|
|
|
|
async fn bar(x: bool) -> Result<f64, i32> {
|
|
if x {
|
|
Err(42) //~ ERROR mismatched types
|
|
//| HELP you might have meant to return this value
|
|
}
|
|
Ok(42.0)
|
|
}
|
|
|
|
trait Identity {
|
|
type Out;
|
|
}
|
|
|
|
impl<T> Identity for T {
|
|
type Out = T;
|
|
}
|
|
|
|
async fn foo2() -> i32 {
|
|
if true {
|
|
1i32 //~ ERROR mismatched types
|
|
//| HELP you might have meant to return this value
|
|
}
|
|
0
|
|
}
|