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https://github.com/rust-lang/rust
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ce2ae62d68
Define the `named_static_lifetimes` lint This lint will replace the existing hard-warning. Replace the named static lifetime hard-warning with the new lint Update the UI tests for the `named_static_lifetimes` lint Remove the direct dependency on `rustc_lint_defs` fix build Signed-off-by: Zhi Qi <qizhi@pingcap.com> use "UNUSED_LIFETIMES" instead Signed-off-by: Zhi Qi <qizhi@pingcap.com> update 1 test and fix typo Signed-off-by: Zhi Qi <qizhi@pingcap.com> update tests Signed-off-by: Zhi Qi <qizhi@pingcap.com> fix tests: add extra blank line Signed-off-by: Zhi Qi <qizhi@pingcap.com>
49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
// Test that we consider equal regions when checking for hidden regions in
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// opaque types
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// check-pass
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// `'a == 'static` so `&'a i32` is fine as the return type
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fn equal_regions_static<'a: 'static>(x: &'a i32) -> impl Sized {
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x
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}
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// `'a == 'b` so `&'b i32` is fine as the return type
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fn equal_regions<'a: 'b, 'b: 'a>(x: &'b i32) -> impl Sized + 'a {
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let y: &'a i32 = x;
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let z: &'b i32 = y;
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x
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}
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// `'a == 'b` so `&'a i32` is fine as the return type
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fn equal_regions_rev<'a: 'b, 'b: 'a>(x: &'a i32) -> impl Sized + 'b {
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let y: &'a i32 = x;
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let z: &'b i32 = y;
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x
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}
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// `'a == 'b` so `*mut &'b i32` is fine as the return type
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fn equal_regions_inv<'a: 'b, 'b: 'a>(x: *mut &'b i32) -> impl Sized + 'a {
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let y: *mut &'a i32 = x;
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let z: *mut &'b i32 = y;
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x
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}
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// `'a == 'b` so `*mut &'a i32` is fine as the return type
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fn equal_regions_inv_rev<'a: 'b, 'b: 'a>(x: *mut &'a i32) -> impl Sized + 'b {
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let y: *mut &'a i32 = x;
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let z: *mut &'b i32 = y;
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x
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}
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// Should be able to infer `fn(&'static ())` as the return type.
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fn contravariant_lub<'a, 'b: 'a, 'c: 'a, 'd: 'b + 'c>(
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x: fn(&'b ()),
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y: fn(&'c ()),
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c: bool,
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) -> impl Sized + 'a {
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if c { x } else { y }
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}
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fn main() {}
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