mirror of https://github.com/rust-lang/rust
49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
//@ revisions: func object clause ok
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#![allow(dead_code)]
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#![feature(rustc_attrs)]
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trait Foo<'a> {
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type Item;
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}
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impl<'a> Foo<'a> for() {
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type Item = ();
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}
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// Check that appearing in a projection input in the argument is not enough:
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#[cfg(func)]
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fn func1(_: for<'a> fn(<() as Foo<'a>>::Item) -> &'a i32) {
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//[func]~^ ERROR E0581
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}
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// Check that appearing in a projection input in the return still
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// causes an error:
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#[cfg(func)]
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fn func2(_: for<'a> fn() -> <() as Foo<'a>>::Item) {
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//[func]~^ ERROR E0581
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}
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#[cfg(object)]
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fn object1(_: Box<dyn for<'a> Fn(<() as Foo<'a>>::Item) -> &'a i32>) {
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//[object]~^ ERROR E0582
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}
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#[cfg(object)]
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fn object2(_: Box<dyn for<'a> Fn() -> <() as Foo<'a>>::Item>) {
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//[object]~^ ERROR E0582
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}
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#[cfg(clause)]
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fn clause1<T>() where T: for<'a> Fn(<() as Foo<'a>>::Item) -> &'a i32 {
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//[clause]~^ ERROR `Output` references lifetime `'a`
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}
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#[cfg(clause)]
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fn clause2<T>() where T: for<'a> Fn() -> <() as Foo<'a>>::Item {
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//[clause]~^ ERROR `Output` references lifetime `'a`
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}
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#[rustc_error]
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fn main() { } //[ok]~ ERROR fatal error triggered by #[rustc_error]
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