Move /src/test to /tests

tests/rustdoc-ui/error-in-impl-trait/README.md

@@ -0,0 +1,7 @@
+Each of these needs to be in a separate file,
+because the `delay_span_bug` ICE in rustdoc won't be triggerred
+if even a single other error was emitted.
+
+However, conceptually they are all testing basically the same thing.
+See https://github.com/rust-lang/rust/pull/73566#issuecomment-653689128
+for more details.

tests/rustdoc-ui/error-in-impl-trait/async.rs

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+// edition:2018
+// check-pass
+
+/// Should compile fine
+pub async fn a() -> u32 {
+    error::_in::async_fn()
+}

tests/rustdoc-ui/error-in-impl-trait/closure.rs

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+// check-pass
+// manually desugared version of an `async fn` (but with a closure instead of a generator)
+pub fn a() -> impl Fn() -> u32 {
+    || content::doesnt::matter()
+}

tests/rustdoc-ui/error-in-impl-trait/const-generics.rs

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+// check-pass
+// edition:2018
+trait ValidTrait {}
+
+/// This has docs
+pub fn extern_fn<const N: usize>() -> impl Iterator<Item = [u8; N]> {
+    loop {}
+}
+
+pub trait Trait<const N: usize> {}
+impl Trait<1> for u8 {}
+impl Trait<2> for u8 {}
+impl<const N: usize> Trait<N> for [u8; N] {}
+
+/// This also has docs
+pub fn test<const N: usize>() -> impl Trait<N> where u8: Trait<N> {
+    loop {}
+}
+
+/// Document all the functions
+pub async fn a_sink<const N: usize>(v: [u8; N]) -> impl Trait<N> {
+    loop {}
+}

tests/rustdoc-ui/error-in-impl-trait/generic-argument.rs

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+// check-pass
+trait ValidTrait {}
+
+/// This has docs
+pub fn f() -> impl ValidTrait {
+    Vec::<DoesNotExist>::new()
+}

tests/rustdoc-ui/error-in-impl-trait/impl-keyword-closure.rs

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+// check-pass
+pub trait ValidTrait {}
+/// This returns impl trait
+pub fn g() -> impl ValidTrait {
+    (|| error::_in::impl_trait::alias::nested::closure())()
+}

tests/rustdoc-ui/error-in-impl-trait/impl-keyword.rs

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+// check-pass
+pub trait ValidTrait {}
+/// This returns impl trait
+pub fn g() -> impl ValidTrait {
+    error::_in::impl_trait()
+}

tests/rustdoc-ui/error-in-impl-trait/realistic-async.rs

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+// edition:2018
+// check-pass
+
+mod windows {
+    pub trait WinFoo {
+        fn foo(&self) {}
+    }
+
+    impl WinFoo for () {}
+}
+
+#[cfg(any(windows, doc))]
+use windows::*;
+
+mod unix {
+    pub trait UnixFoo {
+        fn foo(&self) {}
+    }
+
+    impl UnixFoo for () {}
+}
+
+#[cfg(any(unix, doc))]
+use unix::*;
+
+async fn bar() {
+    ().foo()
+}

tests/rustdoc-ui/error-in-impl-trait/trait-alias-closure.rs

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+// check-pass
+#![feature(type_alias_impl_trait)]
+
+pub trait ValidTrait {}
+type ImplTrait = impl ValidTrait;
+
+/// This returns impl trait, but using a type alias
+pub fn h() -> ImplTrait {
+    (|| error::_in::impl_trait::alias::nested::closure())()
+}

tests/rustdoc-ui/error-in-impl-trait/trait-alias.rs

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+// check-pass
+#![feature(type_alias_impl_trait)]
+
+pub trait ValidTrait {}
+type ImplTrait = impl ValidTrait;
+
+/// This returns impl trait, but using a type alias
+pub fn h() -> ImplTrait {
+    error::_in::impl_trait::alias()
+}