diff options
Diffstat (limited to 'src')
4 files changed, 66 insertions, 1 deletions
diff --git a/src/test/ui/function-pointer/sized-ret-with-binder.rs b/src/test/ui/function-pointer/sized-ret-with-binder.rs new file mode 100644 index 00000000000..104ac4d222e --- /dev/null +++ b/src/test/ui/function-pointer/sized-ret-with-binder.rs @@ -0,0 +1,15 @@ +// check-pass + +#![feature(unboxed_closures)] + +fn is_fn<T: for<'a> Fn<(&'a (),)>>() {} +fn is_fn2<T: for<'a, 'b> Fn<(&'a &'b (),)>>() {} + +struct Outlives<'a, 'b>(std::marker::PhantomData<&'a &'b ()>); + +fn main() { + is_fn::<for<'a> fn(&'a ()) -> &'a ()>(); + is_fn::<for<'a> fn(&'a ()) -> &'a dyn std::fmt::Debug>(); + is_fn2::<for<'a, 'b> fn(&'a &'b ()) -> Outlives<'a, 'b>>(); + is_fn2::<for<'a, 'b> fn(&'a &'b ()) -> (&'a (), &'a ())>(); +} diff --git a/src/test/ui/function-pointer/unsized-ret.rs b/src/test/ui/function-pointer/unsized-ret.rs new file mode 100644 index 00000000000..60af5769d6d --- /dev/null +++ b/src/test/ui/function-pointer/unsized-ret.rs @@ -0,0 +1,14 @@ +#![feature(fn_traits)] +#![feature(unboxed_closures)] + +fn foo<F: Fn<T>, T>(f: Option<F>, t: T) { + let y = (f.unwrap()).call(t); +} + +fn main() { + foo::<fn() -> str, _>(None, ()); + //~^ ERROR the size for values of type `str` cannot be known at compilation time + + foo::<for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a), _>(None, (&(),)); + //~^ ERROR the size for values of type `(dyn std::fmt::Display + 'a)` cannot be known at compilation time +} diff --git a/src/test/ui/function-pointer/unsized-ret.stderr b/src/test/ui/function-pointer/unsized-ret.stderr new file mode 100644 index 00000000000..bec3e2aa3fe --- /dev/null +++ b/src/test/ui/function-pointer/unsized-ret.stderr @@ -0,0 +1,35 @@ +error[E0277]: the size for values of type `str` cannot be known at compilation time + --> $DIR/unsized-ret.rs:9:27 + | +LL | foo::<fn() -> str, _>(None, ()); + | --------------------- ^^^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | + = help: within `fn() -> str`, the trait `Sized` is not implemented for `str` + = note: required because it appears within the type `fn() -> str` +note: required by a bound in `foo` + --> $DIR/unsized-ret.rs:4:11 + | +LL | fn foo<F: Fn<T>, T>(f: Option<F>, t: T) { + | ^^^^^ required by this bound in `foo` + +error[E0277]: the size for values of type `(dyn std::fmt::Display + 'a)` cannot be known at compilation time + --> $DIR/unsized-ret.rs:12:66 + | +LL | foo::<for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a), _>(None, (&(),)); + | ------------------------------------------------------------ ^^^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | + = help: within `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`, the trait `for<'a> Sized` is not implemented for `(dyn std::fmt::Display + 'a)` + = note: required because it appears within the type `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)` +note: required by a bound in `foo` + --> $DIR/unsized-ret.rs:4:11 + | +LL | fn foo<F: Fn<T>, T>(f: Option<F>, t: T) { + | ^^^^^ required by this bound in `foo` + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. diff --git a/src/test/ui/type-alias-impl-trait/issue-53398-cyclic-types.stderr b/src/test/ui/type-alias-impl-trait/issue-53398-cyclic-types.stderr index d20b1cc6d85..0a34e8486a5 100644 --- a/src/test/ui/type-alias-impl-trait/issue-53398-cyclic-types.stderr +++ b/src/test/ui/type-alias-impl-trait/issue-53398-cyclic-types.stderr @@ -1,10 +1,11 @@ -error[E0275]: overflow evaluating the requirement `fn() -> Foo {foo}: Sized` +error[E0275]: overflow evaluating the requirement `Foo: Sized` --> $DIR/issue-53398-cyclic-types.rs:5:13 | LL | fn foo() -> Foo { | ^^^ | = help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`issue_53398_cyclic_types`) + = note: required because it appears within the type `fn() -> Foo {foo}` error: aborting due to previous error |