fn result_to_option() -> Option<u16> {
Some(Err("hello")?)
- //~^ ERROR the `?` operator can only be used on `Option`s in a function that returns `Option`
+ //~^ ERROR the `?` operator can only be used on `Option`s, not `Result`s, in a function that returns `Option`
}
fn control_flow_to_option() -> Option<u64> {
fn result_to_control_flow() -> ControlFlow<String> {
ControlFlow::Continue(Err("hello")?)
- //~^ ERROR the `?` operator can only be used on `ControlFlow<B, _>`s in a function that returns `ControlFlow<B, _>`
+ //~^ ERROR the `?` operator can only be used on `ControlFlow`s in a function that returns `ControlFlow`
}
fn option_to_control_flow() -> ControlFlow<u64> {
Some(3)?;
- //~^ ERROR the `?` operator can only be used on `ControlFlow<B, _>`s in a function that returns `ControlFlow<B, _>`
+ //~^ ERROR the `?` operator can only be used on `ControlFlow`s in a function that returns `ControlFlow`
ControlFlow::Break(10)
}
fn control_flow_to_control_flow() -> ControlFlow<i64> {
ControlFlow::Break(4_u8)?;
- //~^ ERROR the `?` operator can only be used on `ControlFlow<B, _>`s in a function that returns `ControlFlow<B, _>`
+ //~^ ERROR the `?` operator in a function that returns `ControlFlow<B, _>` can only be used on other `ControlFlow<B, _>`s
ControlFlow::Continue(())
}