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ffdb471872
On borrow return type, suggest borrowing from arg or owned return type
When we encounter a function with a return type that has an anonymous lifetime with no argument to borrow from, besides suggesting the `'static` lifetime we now also suggest changing the arguments to be borrows or changing the return type to be an owned type.
```
error[E0106]: missing lifetime specifier
--> $DIR/variadic-ffi-6.rs:7:6
|
LL | ) -> &usize {
| ^ expected named lifetime parameter
|
= help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
|
LL | ) -> &'static usize {
| +++++++
help: instead, you are more likely to want to change one of the arguments to be borrowed...
|
LL | x: &usize,
| +
help: ...or alternatively, to want to return an owned value
|
LL - ) -> &usize {
LL + ) -> usize {
|
```
Fix #85843.
|
||
|---|---|---|
| .. | ||
| feature-gate-extended_varargs_abi_support.rs | ||
| feature-gate-extended_varargs_abi_support.stderr | ||
| issue-32201.rs | ||
| issue-32201.stderr | ||
| issue-86053-1.rs | ||
| issue-86053-1.stderr | ||
| issue-86053-2.rs | ||
| issue-86053-2.stderr | ||
| variadic-ffi-1.rs | ||
| variadic-ffi-1.stderr | ||
| variadic-ffi-2.rs | ||
| variadic-ffi-2.stderr | ||
| variadic-ffi-4.rs | ||
| variadic-ffi-4.stderr | ||
| variadic-ffi-6.rs | ||
| variadic-ffi-6.stderr | ||
| variadic-ffi-no-fixed-args.rs | ||
| variadic-ffi-no-fixed-args.stderr | ||
| variadic-unreachable-arg-error.rs | ||