diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/ui/mismatched_types/transforming-option-ref-issue-127545.rs | 12 | ||||
| -rw-r--r-- | tests/ui/mismatched_types/transforming-option-ref-issue-127545.stderr | 74 |
2 files changed, 85 insertions, 1 deletions
diff --git a/tests/ui/mismatched_types/transforming-option-ref-issue-127545.rs b/tests/ui/mismatched_types/transforming-option-ref-issue-127545.rs index 5ba58e74275..f589e88f68e 100644 --- a/tests/ui/mismatched_types/transforming-option-ref-issue-127545.rs +++ b/tests/ui/mismatched_types/transforming-option-ref-issue-127545.rs @@ -4,3 +4,15 @@ pub fn foo(arg: Option<&Vec<i32>>) -> Option<&[i32]> { arg //~ ERROR 5:5: 5:8: mismatched types [E0308] } + +pub fn bar(arg: Option<&Vec<i32>>) -> &[i32] { + arg.unwrap_or(&[]) //~ ERROR 9:19: 9:22: mismatched types [E0308] +} + +pub fn barzz<'a>(arg: Option<&'a Vec<i32>>, v: &'a [i32]) -> &'a [i32] { + arg.unwrap_or(v) //~ ERROR 13:19: 13:20: mismatched types [E0308] +} + +pub fn convert_result(arg: Result<&Vec<i32>, ()>) -> &[i32] { + arg.unwrap_or(&[]) //~ ERROR 17:19: 17:22: mismatched types [E0308] +} diff --git a/tests/ui/mismatched_types/transforming-option-ref-issue-127545.stderr b/tests/ui/mismatched_types/transforming-option-ref-issue-127545.stderr index b7c7202113a..ad423f86ef9 100644 --- a/tests/ui/mismatched_types/transforming-option-ref-issue-127545.stderr +++ b/tests/ui/mismatched_types/transforming-option-ref-issue-127545.stderr @@ -13,6 +13,78 @@ help: try using `.map(|v| &**v)` to convert `Option<&Vec<i32>>` to `Option<&[i32 LL | arg.map(|v| &**v) | ++++++++++++++ -error: aborting due to 1 previous error +error[E0308]: mismatched types + --> $DIR/transforming-option-ref-issue-127545.rs:9:19 + | +LL | arg.unwrap_or(&[]) + | --------- ^^^ expected `&Vec<i32>`, found `&[_; 0]` + | | + | arguments to this method are incorrect + | + = note: expected reference `&Vec<i32>` + found reference `&[_; 0]` +help: the return type of this call is `&[_; 0]` due to the type of the argument passed + --> $DIR/transforming-option-ref-issue-127545.rs:9:5 + | +LL | arg.unwrap_or(&[]) + | ^^^^^^^^^^^^^^---^ + | | + | this argument influences the return type of `unwrap_or` +note: method defined here + --> $SRC_DIR/core/src/option.rs:LL:COL +help: use `Option::map_or` to deref inner value of `Option` + | +LL | arg.map_or(&[], |v| v) + | ~~~~~~ +++++++ + +error[E0308]: mismatched types + --> $DIR/transforming-option-ref-issue-127545.rs:13:19 + | +LL | arg.unwrap_or(v) + | --------- ^ expected `&Vec<i32>`, found `&[i32]` + | | + | arguments to this method are incorrect + | + = note: expected reference `&Vec<i32>` + found reference `&'a [i32]` +help: the return type of this call is `&'a [i32]` due to the type of the argument passed + --> $DIR/transforming-option-ref-issue-127545.rs:13:5 + | +LL | arg.unwrap_or(v) + | ^^^^^^^^^^^^^^-^ + | | + | this argument influences the return type of `unwrap_or` +note: method defined here + --> $SRC_DIR/core/src/option.rs:LL:COL +help: use `Option::map_or` to deref inner value of `Option` + | +LL | arg.map_or(v, |v| v) + | ~~~~~~ +++++++ + +error[E0308]: mismatched types + --> $DIR/transforming-option-ref-issue-127545.rs:17:19 + | +LL | arg.unwrap_or(&[]) + | --------- ^^^ expected `&Vec<i32>`, found `&[_; 0]` + | | + | arguments to this method are incorrect + | + = note: expected reference `&Vec<i32>` + found reference `&[_; 0]` +help: the return type of this call is `&[_; 0]` due to the type of the argument passed + --> $DIR/transforming-option-ref-issue-127545.rs:17:5 + | +LL | arg.unwrap_or(&[]) + | ^^^^^^^^^^^^^^---^ + | | + | this argument influences the return type of `unwrap_or` +note: method defined here + --> $SRC_DIR/core/src/result.rs:LL:COL +help: use `Result::map_or` to deref inner value of `Result` + | +LL | arg.map_or(&[], |v| v) + | ~~~~~~ +++++++ + +error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0308`. |