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r=Nilstrieb
Suggest Upgrading Compiler for Gated Features
This PR addresses #117318
I have a few questions:
1. Do we want to specify the current version and release date of the compiler? I have added this in via environment variables, which I found in the code for the rustc cli where it handles the `--version` flag
a. How can I handle the changing message in the tests?
3. Do we want to only show this message when the compiler is old?
a. How can we determine when the compiler is old?
I'll wait until we figure out the message to bless the tests
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Update tests
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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
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LL | ) -> &usize {
| ^ expected named lifetime parameter
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= 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`
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LL | ) -> &'static usize {
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help: instead, you are more likely to want to change one of the arguments to be borrowed...
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LL | x: &usize,
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help: ...or alternatively, to want to return an owned value
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LL - ) -> &usize {
LL + ) -> usize {
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```
Fix #85843.
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Co-authored-by: Adrian <adrian.iosdev@gmail.com>
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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
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LL | ) -> &usize {
| ^ expected named lifetime parameter
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= 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`
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LL | ) -> &'static usize {
| +++++++
help: instead, you are more likely to want to change one of the arguments to be borrowed...
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LL | x: &usize,
| +
help: ...or alternatively, to want to return an owned value
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LL - ) -> &usize {
LL + ) -> usize {
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```
Fix #85843.
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If a function incorrectly contains multiple `...` args, and is also not
foreign or `unsafe extern "C"`, only emit the latter error once.
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This is the default calling convention for ARM - it is used for extern "C",
therefore it supports varargs.
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Also remove a note that I don't consider to be very useful in context.
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CC #99430
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Stabilize `abi_efiapi` feature
Tracking issue: https://github.com/rust-lang/rust/issues/65815
Closes #65815
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Tracking issue: https://github.com/rust-lang/rust/issues/65815
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