From 7a75a663fb55233081e2599857ee61197d23a398 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Mon, 27 May 2019 01:43:12 +0900 Subject: [PATCH 01/12] Allow lifetime elision in `Pin<&(mut) Self>` --- src/librustc/middle/resolve_lifetime.rs | 29 ++++++++- .../self/arbitrary_self_types_pin_lifetime.rs | 60 +++++++++++++++++++ ...rary_self_types_pin_lifetime_impl_trait.rs | 13 ++++ ..._self_types_pin_lifetime_impl_trait.stderr | 20 +++++++ ...itrary_self_types_pin_lifetime_mismatch.rs | 13 ++++ ...ry_self_types_pin_lifetime_mismatch.stderr | 18 ++++++ src/test/ui/self/self_lifetime.rs | 13 ++++ 7 files changed, 165 insertions(+), 1 deletion(-) create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime.rs create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.rs create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.stderr create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr create mode 100644 src/test/ui/self/self_lifetime.rs diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs index 412346bab257e..3bd423207d511 100644 --- a/src/librustc/middle/resolve_lifetime.rs +++ b/src/librustc/middle/resolve_lifetime.rs @@ -2145,7 +2145,34 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { false }; - if let hir::TyKind::Rptr(lifetime_ref, ref mt) = inputs[0].node { + let mut self_arg = &inputs[0].node; + + // Apply `self: &(mut) Self` elision rules even if nested in `Pin`. + loop { + if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = *self_arg { + if let Res::Def(DefKind::Struct, def_id) = path.res { + if self.tcx.lang_items().pin_type() == Some(def_id) { + if let Some(args) = path + .segments + .last() + .and_then(|segment| segment.args.as_ref()) + { + if args.args.len() == 1 { + if let GenericArg::Type(ty) = &args.args[0] { + self_arg = &ty.node; + // Keep dereferencing `self_arg` until we get to non-`Pin` + // types. + continue; + } + } + } + } + } + } + break; + } + + if let hir::TyKind::Rptr(lifetime_ref, ref mt) = *self_arg { if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = mt.ty.node { if is_self_ty(path.res) { if let Some(&lifetime) = self.map.defs.get(&lifetime_ref.hir_id) { diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs new file mode 100644 index 0000000000000..668aaf7166a0f --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs @@ -0,0 +1,60 @@ +// compile-pass + +use std::pin::Pin; +use std::task::{Context, Poll}; + +struct Foo; + +impl Foo { + fn pin_ref(self: Pin<&Self>) -> Pin<&Self> { self } + + fn pin_mut(self: Pin<&mut Self>) -> Pin<&mut Self> { self } + + fn pin_pin_pin_ref(self: Pin>>) -> Pin>> { self } + + fn pin_ref_impl_trait(self: Pin<&Self>) -> impl Clone + '_ { self } + + fn b(self: Pin<&Foo>, f: &Foo) -> Pin<&Foo> { self } +} + +type Alias = Pin; +impl Foo { + fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg } +} + +struct Bar { + field1: T, + field2: U, +} + +impl Bar { + fn fields(self: Pin<&mut Self>) -> (Pin<&mut T>, Pin<&mut U>) { + let this = self.get_mut(); + (Pin::new(&mut this.field1), Pin::new(&mut this.field2)) + } +} + +trait AsyncBufRead { + fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) + -> Poll>; +} + +struct Baz(Vec); + +impl AsyncBufRead for Baz { + fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) + -> Poll> + { + Poll::Ready(Ok(&self.get_mut().0)) + } +} + +fn main() { + let mut foo = Foo; + { Pin::new(&foo).pin_ref() }; + { Pin::new(&mut foo).pin_mut() }; + { Pin::new(Pin::new(Pin::new(&foo))).pin_pin_pin_ref() }; + { Pin::new(&foo).pin_ref_impl_trait() }; + let mut bar = Bar { field1: 0u8, field2: 1u8 }; + { Pin::new(&mut bar).fields() }; +} diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.rs new file mode 100644 index 0000000000000..ad8959727cbee --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.rs @@ -0,0 +1,13 @@ +// compile-fail + +use std::pin::Pin; + +struct Foo; + +impl Foo { + fn f(self: Pin<&Self>) -> impl Clone { self } //~ ERROR cannot infer an appropriate lifetime +} + +fn main() { + { Pin::new(&Foo).f() }; +} diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.stderr b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.stderr new file mode 100644 index 0000000000000..5118280e7ec0c --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.stderr @@ -0,0 +1,20 @@ +error: cannot infer an appropriate lifetime + --> $DIR/arbitrary_self_types_pin_lifetime_impl_trait.rs:8:44 + | +LL | fn f(self: Pin<&Self>) -> impl Clone { self } + | ---------- ^^^^ ...but this borrow... + | | + | this return type evaluates to the `'static` lifetime... + | +note: ...can't outlive the anonymous lifetime #1 defined on the method body at 8:5 + --> $DIR/arbitrary_self_types_pin_lifetime_impl_trait.rs:8:5 + | +LL | fn f(self: Pin<&Self>) -> impl Clone { self } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +help: you can add a constraint to the return type to make it last less than `'static` and match the anonymous lifetime #1 defined on the method body at 8:5 + | +LL | fn f(self: Pin<&Self>) -> impl Clone + '_ { self } + | ^^^^^^^^^^^^^^^ + +error: aborting due to previous error + diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs new file mode 100644 index 0000000000000..3ed5e6bdd7211 --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs @@ -0,0 +1,13 @@ +// compile-fail + +use std::pin::Pin; + +struct Foo; + +impl Foo { + fn a(self: Pin<&Foo>, f: &Foo) -> &Foo { f } //~ ERROR E0623 + + fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, f) } //~ ERROR E0623 +} + +fn main() {} diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr new file mode 100644 index 0000000000000..6e345b03056e9 --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr @@ -0,0 +1,18 @@ +error[E0623]: lifetime mismatch + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:8:46 + | +LL | fn a(self: Pin<&Foo>, f: &Foo) -> &Foo { f } + | ---- ---- ^ ...but data from `f` is returned here + | | + | this parameter and the return type are declared with different lifetimes... + +error[E0623]: lifetime mismatch + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:10:76 + | +LL | fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, f) } + | ---- ----------------- ^ ...but data from `f` is returned here + | | + | this parameter and the return type are declared with different lifetimes... + +error: aborting due to 2 previous errors + diff --git a/src/test/ui/self/self_lifetime.rs b/src/test/ui/self/self_lifetime.rs new file mode 100644 index 0000000000000..a3163ade0404f --- /dev/null +++ b/src/test/ui/self/self_lifetime.rs @@ -0,0 +1,13 @@ +// compile-pass + +struct Foo<'a>(&'a ()); +impl<'a> Foo<'a> { + fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 } +} + +type Alias = Foo<'static>; +impl Alias { + fn bar<'a>(self: &Alias, arg: &'a ()) -> &() { arg } +} + +fn main() {} From ee53d9a802ba34701904cb34537144f61f93c410 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Mon, 27 May 2019 22:06:08 +0900 Subject: [PATCH 02/12] Remove query for `.pin_type()` --- src/librustc/middle/resolve_lifetime.rs | 66 +++++++++---------- .../self/arbitrary_self_types_pin_lifetime.rs | 2 +- ...itrary_self_types_pin_lifetime_mismatch.rs | 5 ++ ...ry_self_types_pin_lifetime_mismatch.stderr | 10 ++- 4 files changed, 47 insertions(+), 36 deletions(-) diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs index 3bd423207d511..3fe11a46081ed 100644 --- a/src/librustc/middle/resolve_lifetime.rs +++ b/src/librustc/middle/resolve_lifetime.rs @@ -2145,46 +2145,44 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { false }; - let mut self_arg = &inputs[0].node; - - // Apply `self: &(mut) Self` elision rules even if nested in `Pin`. - loop { - if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = *self_arg { - if let Res::Def(DefKind::Struct, def_id) = path.res { - if self.tcx.lang_items().pin_type() == Some(def_id) { - if let Some(args) = path - .segments - .last() - .and_then(|segment| segment.args.as_ref()) - { - if args.args.len() == 1 { - if let GenericArg::Type(ty) = &args.args[0] { - self_arg = &ty.node; - // Keep dereferencing `self_arg` until we get to non-`Pin` - // types. - continue; - } - } + struct SelfVisitor<'a, F: FnMut(Res) -> bool> { + is_self_ty: F, + map: &'a NamedRegionMap, + lifetime: Option, + } + + impl<'a, F: FnMut(Res) -> bool> Visitor<'a> for SelfVisitor<'a, F> { + fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'a> { + NestedVisitorMap::None + } + + fn visit_ty(&mut self, ty: &'a hir::Ty) { + if let hir::TyKind::Rptr(lifetime_ref, ref mt) = ty.node { + if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = mt.ty.node + { + if (self.is_self_ty)(path.res) { + self.lifetime = self.map.defs.get(&lifetime_ref.hir_id).copied(); + return; } } } + intravisit::walk_ty(self, ty) } - break; } - if let hir::TyKind::Rptr(lifetime_ref, ref mt) = *self_arg { - if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = mt.ty.node { - if is_self_ty(path.res) { - if let Some(&lifetime) = self.map.defs.get(&lifetime_ref.hir_id) { - let scope = Scope::Elision { - elide: Elide::Exact(lifetime), - s: self.scope, - }; - self.with(scope, |_, this| this.visit_ty(output)); - return; - } - } - } + let mut visitor = SelfVisitor { + is_self_ty, + map: self.map, + lifetime: None, + }; + visitor.visit_ty(&inputs[0]); + if let Some(lifetime) = visitor.lifetime { + let scope = Scope::Elision { + elide: Elide::Exact(lifetime), + s: self.scope, + }; + self.with(scope, |_, this| this.visit_ty(output)); + return; } } diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs index 668aaf7166a0f..ba574eeb4609b 100644 --- a/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs @@ -19,7 +19,7 @@ impl Foo { type Alias = Pin; impl Foo { - fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg } + fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> Alias<&Self> { self } } struct Bar { diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs index 3ed5e6bdd7211..fc5f94201b81a 100644 --- a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.rs @@ -10,4 +10,9 @@ impl Foo { fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, f) } //~ ERROR E0623 } +type Alias = Pin; +impl Foo { + fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg } //~ ERROR E0623 +} + fn main() {} diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr index 6e345b03056e9..3296e14f806e1 100644 --- a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.stderr @@ -14,5 +14,13 @@ LL | fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, | | | this parameter and the return type are declared with different lifetimes... -error: aborting due to 2 previous errors +error[E0623]: lifetime mismatch + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:15:58 + | +LL | fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg } + | ------ --- ^^^ ...but data from `arg` is returned here + | | + | this parameter and the return type are declared with different lifetimes... + +error: aborting due to 3 previous errors From 07903fe53ecca681936c5b9da0e9511fb80281eb Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Wed, 29 May 2019 17:37:28 +0900 Subject: [PATCH 03/12] Make is_self_ty a method on SelfVisitor --- src/librustc/middle/resolve_lifetime.rs | 67 +++++++++++++------------ 1 file changed, 35 insertions(+), 32 deletions(-) diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs index 3fe11a46081ed..5c5e73aa427a4 100644 --- a/src/librustc/middle/resolve_lifetime.rs +++ b/src/librustc/middle/resolve_lifetime.rs @@ -2117,41 +2117,44 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { // First (determined here), if `self` is by-reference, then the // implied output region is the region of the self parameter. if has_self { - // Look for `self: &'a Self` - also desugared from `&'a self`, - // and if that matches, use it for elision and return early. - let is_self_ty = |res: Res| { - if let Res::SelfTy(..) = res { - return true; - } - - // Can't always rely on literal (or implied) `Self` due - // to the way elision rules were originally specified. - let impl_self = impl_self.map(|ty| &ty.node); - if let Some(&hir::TyKind::Path(hir::QPath::Resolved(None, ref path))) = impl_self { - match path.res { - // Whitelist the types that unambiguously always - // result in the same type constructor being used - // (it can't differ between `Self` and `self`). - Res::Def(DefKind::Struct, _) - | Res::Def(DefKind::Union, _) - | Res::Def(DefKind::Enum, _) - | Res::PrimTy(_) => { - return res == path.res - } - _ => {} + struct SelfVisitor<'a> { + map: &'a NamedRegionMap, + impl_self: Option<&'a hir::TyKind>, + lifetime: Option, + } + + impl SelfVisitor<'_> { + // Look for `self: &'a Self` - also desugared from `&'a self`, + // and if that matches, use it for elision and return early. + fn is_self_ty(&self, res: Res) -> bool { + if let Res::SelfTy(..) = res { + return true; } - } - false - }; + // Can't always rely on literal (or implied) `Self` due + // to the way elision rules were originally specified. + if let Some(&hir::TyKind::Path(hir::QPath::Resolved(None, ref path))) = + self.impl_self + { + match path.res { + // Whitelist the types that unambiguously always + // result in the same type constructor being used + // (it can't differ between `Self` and `self`). + Res::Def(DefKind::Struct, _) + | Res::Def(DefKind::Union, _) + | Res::Def(DefKind::Enum, _) + | Res::PrimTy(_) => { + return res == path.res + } + _ => {} + } + } - struct SelfVisitor<'a, F: FnMut(Res) -> bool> { - is_self_ty: F, - map: &'a NamedRegionMap, - lifetime: Option, + false + } } - impl<'a, F: FnMut(Res) -> bool> Visitor<'a> for SelfVisitor<'a, F> { + impl<'a> Visitor<'a> for SelfVisitor<'a> { fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'a> { NestedVisitorMap::None } @@ -2160,7 +2163,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { if let hir::TyKind::Rptr(lifetime_ref, ref mt) = ty.node { if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = mt.ty.node { - if (self.is_self_ty)(path.res) { + if self.is_self_ty(path.res) { self.lifetime = self.map.defs.get(&lifetime_ref.hir_id).copied(); return; } @@ -2171,8 +2174,8 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { } let mut visitor = SelfVisitor { - is_self_ty, map: self.map, + impl_self: impl_self.map(|ty| &ty.node), lifetime: None, }; visitor.visit_ty(&inputs[0]); From a2b4ec2f656afeeb6fbc22cdf23124f02dbcaf07 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Wed, 29 May 2019 18:50:24 +0900 Subject: [PATCH 04/12] Use Set1 instead of Option --- src/librustc/middle/resolve_lifetime.rs | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs index 5c5e73aa427a4..3d80fb28c738d 100644 --- a/src/librustc/middle/resolve_lifetime.rs +++ b/src/librustc/middle/resolve_lifetime.rs @@ -2120,7 +2120,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { struct SelfVisitor<'a> { map: &'a NamedRegionMap, impl_self: Option<&'a hir::TyKind>, - lifetime: Option, + lifetime: Set1, } impl SelfVisitor<'_> { @@ -2164,8 +2164,9 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { if let hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) = mt.ty.node { if self.is_self_ty(path.res) { - self.lifetime = self.map.defs.get(&lifetime_ref.hir_id).copied(); - return; + if let Some(lifetime) = self.map.defs.get(&lifetime_ref.hir_id) { + self.lifetime.insert(*lifetime); + } } } } @@ -2176,10 +2177,10 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> { let mut visitor = SelfVisitor { map: self.map, impl_self: impl_self.map(|ty| &ty.node), - lifetime: None, + lifetime: Set1::Empty, }; visitor.visit_ty(&inputs[0]); - if let Some(lifetime) = visitor.lifetime { + if let Set1::One(lifetime) = visitor.lifetime { let scope = Scope::Elision { elide: Elide::Exact(lifetime), s: self.scope, From bdc8b9381df53df0ac89ec12c61c2857347fa52a Mon Sep 17 00:00:00 2001 From: Niko Matsakis Date: Fri, 28 Jun 2019 14:46:45 -0400 Subject: [PATCH 05/12] add a bevy of new test cases --- src/test/ui/self/elision/README.md | 45 ++++++++++++++ src/test/ui/self/elision/alias.rs | 32 ++++++++++ src/test/ui/self/elision/alias.stderr | 7 +++ src/test/ui/self/elision/lt-alias.rs | 38 ++++++++++++ src/test/ui/self/elision/lt-ref-self.rs | 38 ++++++++++++ src/test/ui/self/elision/lt-ref-self.stderr | 62 +++++++++++++++++++ src/test/ui/self/elision/lt-self.rs | 49 +++++++++++++++ src/test/ui/self/elision/lt-struct.rs | 36 +++++++++++ src/test/ui/self/elision/ref-alias.rs | 39 ++++++++++++ src/test/ui/self/elision/ref-mut-alias.rs | 32 ++++++++++ src/test/ui/self/elision/ref-mut-alias.stderr | 7 +++ src/test/ui/self/elision/ref-mut-self.rs | 40 ++++++++++++ src/test/ui/self/elision/ref-mut-self.stderr | 62 +++++++++++++++++++ src/test/ui/self/elision/ref-mut-struct.rs | 34 ++++++++++ .../ui/self/elision/ref-mut-struct.stderr | 52 ++++++++++++++++ src/test/ui/self/elision/ref-self.rs | 40 ++++++++++++ src/test/ui/self/elision/ref-self.stderr | 62 +++++++++++++++++++ src/test/ui/self/elision/ref-struct.rs | 34 ++++++++++ src/test/ui/self/elision/ref-struct.stderr | 52 ++++++++++++++++ src/test/ui/self/elision/self.rs | 36 +++++++++++ src/test/ui/self/elision/struct.rs | 34 ++++++++++ 21 files changed, 831 insertions(+) create mode 100644 src/test/ui/self/elision/README.md create mode 100644 src/test/ui/self/elision/alias.rs create mode 100644 src/test/ui/self/elision/alias.stderr create mode 100644 src/test/ui/self/elision/lt-alias.rs create mode 100644 src/test/ui/self/elision/lt-ref-self.rs create mode 100644 src/test/ui/self/elision/lt-ref-self.stderr create mode 100644 src/test/ui/self/elision/lt-self.rs create mode 100644 src/test/ui/self/elision/lt-struct.rs create mode 100644 src/test/ui/self/elision/ref-alias.rs create mode 100644 src/test/ui/self/elision/ref-mut-alias.rs create mode 100644 src/test/ui/self/elision/ref-mut-alias.stderr create mode 100644 src/test/ui/self/elision/ref-mut-self.rs create mode 100644 src/test/ui/self/elision/ref-mut-self.stderr create mode 100644 src/test/ui/self/elision/ref-mut-struct.rs create mode 100644 src/test/ui/self/elision/ref-mut-struct.stderr create mode 100644 src/test/ui/self/elision/ref-self.rs create mode 100644 src/test/ui/self/elision/ref-self.stderr create mode 100644 src/test/ui/self/elision/ref-struct.rs create mode 100644 src/test/ui/self/elision/ref-struct.stderr create mode 100644 src/test/ui/self/elision/self.rs create mode 100644 src/test/ui/self/elision/struct.rs diff --git a/src/test/ui/self/elision/README.md b/src/test/ui/self/elision/README.md new file mode 100644 index 0000000000000..de29a9d5e53bc --- /dev/null +++ b/src/test/ui/self/elision/README.md @@ -0,0 +1,45 @@ +Test cases intended to to document behavior and tryto exhaustively +explore the combinations. + +## Confidence + +These tests are not yet considered 100% normative, in that some +aspects of the current behavior are not desirable. This is expressed +in the "confidence" field in the following table. Values: + +| Confidence | Interpretation | +| --- | --- | +| 100% | this will remain recommended behavior | +| 75% | unclear whether we will continue to accept this | +| 50% | this will likely be deprecated but remain valid | +| 25% | this could change in the future | +| 0% | this is definitely bogus and will likely change in the future in *some* way | + +## Tests + +| Test file | `Self` type | Pattern | Current elision behavior | Confidence | +| --- | --- | --- | --- | --- | +| `self.rs` | `Struct` | `Self` | ignore `self` parameter | 100% | +| `struct.rs` | `Struct` | `Struct` | ignore `self` parameter | 100% | +| `alias.rs` | `Struct` | `Alias` | ignore `self` parameter | 100% | +| `ref-self.rs` | `Struct` | `&Self` | take lifetime from `&Self` | 100% | +| `ref-mut-self.rs` | `Struct` | `&mut Self` | take lifetime from `&Self` | 100% | +| `ref-struct.rs` | `Struct` | `&Struct` | take lifetime from `&Self` | 50% | +| `ref-mut-struct.rs` | `Struct` | `&Struct` | take lifetime from `&Self` | 50% | +| `ref-alias.rs` | `Struct` | `&Alias` | ignore `Alias` | 0% | +| `ref-mut-alias.rs` | `Struct` | `&Alias` | ignore `Alias` | 0% | +| `lt-self.rs` | `Struct<'a>` | `Self` | ignore `Self` (and hence `'a`) | 25% | +| `lt-struct.rs` | `Struct<'a>` | `Self` | ignore `Self` (and hence `'a`) | 0% | +| `lt-alias.rs` | `Alias<'a>` | `Self` | ignore `Self` (and hence `'a`) | 0% | +| `lt-ref-self.rs` | `Struct<'a>` | `&Self` | take lifetime from `&Self` | 75% | + +In each case, we test the following patterns: + +- `self: XXX` +- `self: Box` +- `self: Pin` +- `self: Box>` +- `self: Box>` + +In the non-reference cases, `Pin` causes errors so we substitute `Rc`. + diff --git a/src/test/ui/self/elision/alias.rs b/src/test/ui/self/elision/alias.rs new file mode 100644 index 0000000000000..6f113ec1a4bc9 --- /dev/null +++ b/src/test/ui/self/elision/alias.rs @@ -0,0 +1,32 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using an alias for `Struct`: + + fn alias(self: Alias, f: &u32) -> &u32 { + f + } + + fn box_Alias(self: Box, f: &u32) -> &u32 { + f + } + + fn rc_Alias(self: Rc, f: &u32) -> &u32 { + f + } + + fn box_box_Alias(self: Box>, f: &u32) -> &u32 { + f + } + + fn box_rc_Alias(self: Box>, f: &u32) -> &u32 { + f + } +} diff --git a/src/test/ui/self/elision/alias.stderr b/src/test/ui/self/elision/alias.stderr new file mode 100644 index 0000000000000..a8f2a125b5eb7 --- /dev/null +++ b/src/test/ui/self/elision/alias.stderr @@ -0,0 +1,7 @@ +error[E0601]: `main` function not found in crate `alias` + | + = note: consider adding a `main` function to `$DIR/alias.rs` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0601`. diff --git a/src/test/ui/self/elision/lt-alias.rs b/src/test/ui/self/elision/lt-alias.rs new file mode 100644 index 0000000000000..044682789007d --- /dev/null +++ b/src/test/ui/self/elision/lt-alias.rs @@ -0,0 +1,38 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +struct Struct<'a> { x: &'a u32 } + +type Alias<'a> = Struct<'a>; + +impl<'a> Alias<'a> { + fn take_self(self, f: &u32) -> &u32 { + f + } + + fn take_Alias(self: Alias<'a>, f: &u32) -> &u32 { + f + } + + fn take_Box_Alias(self: Box>, f: &u32) -> &u32 { + f + } + + fn take_Box_Box_Alias(self: Box>>, f: &u32) -> &u32 { + f + } + + fn take_Rc_Alias(self: Rc>, f: &u32) -> &u32 { + f + } + + fn take_Box_Rc_Alias(self: Box>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/lt-ref-self.rs b/src/test/ui/self/elision/lt-ref-self.rs new file mode 100644 index 0000000000000..8abf2876a5c1b --- /dev/null +++ b/src/test/ui/self/elision/lt-ref-self.rs @@ -0,0 +1,38 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct<'a> { data: &'a u32 } + +impl<'a> Struct<'a> { + // Test using `&self` sugar: + + fn ref_self(&self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + // Test using `&Self` explicitly: + + fn ref_Self(self: &Self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_pin_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/lt-ref-self.stderr b/src/test/ui/self/elision/lt-ref-self.stderr new file mode 100644 index 0000000000000..f73b3eddd3821 --- /dev/null +++ b/src/test/ui/self/elision/lt-ref-self.stderr @@ -0,0 +1,62 @@ +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:12:9 + | +LL | fn ref_self(&self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:18:9 + | +LL | fn ref_Self(self: &Self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:22:9 + | +LL | fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:26:9 + | +LL | fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:30:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/lt-ref-self.rs:34:9 + | +LL | fn box_pin_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 6 previous errors + diff --git a/src/test/ui/self/elision/lt-self.rs b/src/test/ui/self/elision/lt-self.rs new file mode 100644 index 0000000000000..c33df08e0ee48 --- /dev/null +++ b/src/test/ui/self/elision/lt-self.rs @@ -0,0 +1,49 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; +use std::rc::Rc; + +struct Struct<'a> { + x: &'a u32 +} + +impl<'a> Struct<'a> { + fn take_self(self, f: &u32) -> &u32 { + f + } + + fn take_Self(self: Self, f: &u32) -> &u32 { + f + } + + fn take_Box_Self(self: Box, f: &u32) -> &u32 { + f + } + + fn take_Box_Box_Self(self: Box>, f: &u32) -> &u32 { + f + } + + fn take_Rc_Self(self: Rc, f: &u32) -> &u32 { + f + } + + fn take_Box_Rc_Self(self: Box>, f: &u32) -> &u32 { + f + } + + // N/A + //fn take_Pin_Self(self: Pin, f: &u32) -> &u32 { + // f + //} + + // N/A + //fn take_Box_Pin_Self(self: Box>, f: &u32) -> &u32 { + // f + //} +} + +fn main() { } diff --git a/src/test/ui/self/elision/lt-struct.rs b/src/test/ui/self/elision/lt-struct.rs new file mode 100644 index 0000000000000..79ffc8fd6f4bd --- /dev/null +++ b/src/test/ui/self/elision/lt-struct.rs @@ -0,0 +1,36 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +struct Struct<'a> { x: &'a u32 } + +impl<'a> Struct<'a> { + fn take_self(self, f: &u32) -> &u32 { + f + } + + fn take_Struct(self: Struct<'a>, f: &u32) -> &u32 { + f + } + + fn take_Box_Struct(self: Box>, f: &u32) -> &u32 { + f + } + + fn take_Box_Box_Struct(self: Box>>, f: &u32) -> &u32 { + f + } + + fn take_Rc_Struct(self: Rc>, f: &u32) -> &u32 { + f + } + + fn take_Box_Rc_Struct(self: Box>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-alias.rs b/src/test/ui/self/elision/ref-alias.rs new file mode 100644 index 0000000000000..23bfe8fb029f6 --- /dev/null +++ b/src/test/ui/self/elision/ref-alias.rs @@ -0,0 +1,39 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using an alias for `Struct`: + // + // FIXME. We currently fail to recognize this as the self type, which + // feels like a bug. + + fn ref_Alias(self: &Alias, f: &u32) -> &u32 { + f + } + + fn box_ref_Alias(self: Box<&Alias>, f: &u32) -> &u32 { + f + } + + fn pin_ref_Alias(self: Pin<&Alias>, f: &u32) -> &u32 { + f + } + + fn box_box_ref_Alias(self: Box>, f: &u32) -> &u32 { + f + } + + fn box_pin_ref_Alias(self: Box>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-mut-alias.rs b/src/test/ui/self/elision/ref-mut-alias.rs new file mode 100644 index 0000000000000..abb412965768d --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-alias.rs @@ -0,0 +1,32 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using an alias for `Struct`: + + fn ref_Alias(self: &mut Alias, f: &u32) -> &u32 { + f + } + + fn box_ref_Alias(self: Box<&mut Alias>, f: &u32) -> &u32 { + f + } + + fn pin_ref_Alias(self: Pin<&mut Alias>, f: &u32) -> &u32 { + f + } + + fn box_box_ref_Alias(self: Box>, f: &u32) -> &u32 { + f + } + + fn box_pin_ref_Alias(self: Box>, f: &u32) -> &u32 { + f + } +} diff --git a/src/test/ui/self/elision/ref-mut-alias.stderr b/src/test/ui/self/elision/ref-mut-alias.stderr new file mode 100644 index 0000000000000..cf202ccaa5d88 --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-alias.stderr @@ -0,0 +1,7 @@ +error[E0601]: `main` function not found in crate `ref_mut_alias` + | + = note: consider adding a `main` function to `$DIR/ref-mut-alias.rs` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0601`. diff --git a/src/test/ui/self/elision/ref-mut-self.rs b/src/test/ui/self/elision/ref-mut-self.rs new file mode 100644 index 0000000000000..6705ca9e30598 --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-self.rs @@ -0,0 +1,40 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using `&mut self` sugar: + + fn ref_self(&mut self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + // Test using `&mut Self` explicitly: + + fn ref_Self(self: &mut Self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-mut-self.stderr b/src/test/ui/self/elision/ref-mut-self.stderr new file mode 100644 index 0000000000000..05dc5b774c832 --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-self.stderr @@ -0,0 +1,62 @@ +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:14:9 + | +LL | fn ref_self(&mut self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:20:9 + | +LL | fn ref_Self(self: &mut Self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:24:9 + | +LL | fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:28:9 + | +LL | fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:32:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-self.rs:36:9 + | +LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 6 previous errors + diff --git a/src/test/ui/self/elision/ref-mut-struct.rs b/src/test/ui/self/elision/ref-mut-struct.rs new file mode 100644 index 0000000000000..f063728e24751 --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-struct.rs @@ -0,0 +1,34 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using `&mut Struct` explicitly: + + fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_pin_ref_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-mut-struct.stderr b/src/test/ui/self/elision/ref-mut-struct.stderr new file mode 100644 index 0000000000000..88dfb17892a2f --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-struct.stderr @@ -0,0 +1,52 @@ +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-struct.rs:14:9 + | +LL | fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-struct.rs:18:9 + | +LL | fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-struct.rs:22:9 + | +LL | fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-struct.rs:26:9 + | +LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-mut-struct.rs:30:9 + | +LL | fn box_pin_ref_Struct(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 5 previous errors + diff --git a/src/test/ui/self/elision/ref-self.rs b/src/test/ui/self/elision/ref-self.rs new file mode 100644 index 0000000000000..af10e10d3111c --- /dev/null +++ b/src/test/ui/self/elision/ref-self.rs @@ -0,0 +1,40 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using `&self` sugar: + + fn ref_self(&self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + // Test using `&Self` explicitly: + + fn ref_Self(self: &Self, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-self.stderr b/src/test/ui/self/elision/ref-self.stderr new file mode 100644 index 0000000000000..10131cc5935a5 --- /dev/null +++ b/src/test/ui/self/elision/ref-self.stderr @@ -0,0 +1,62 @@ +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:14:9 + | +LL | fn ref_self(&self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:20:9 + | +LL | fn ref_Self(self: &Self, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:24:9 + | +LL | fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:28:9 + | +LL | fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:32:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:36:9 + | +LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 6 previous errors + diff --git a/src/test/ui/self/elision/ref-struct.rs b/src/test/ui/self/elision/ref-struct.rs new file mode 100644 index 0000000000000..28afe17c23467 --- /dev/null +++ b/src/test/ui/self/elision/ref-struct.rs @@ -0,0 +1,34 @@ +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +struct Struct { } + +type Alias = Struct; + +impl Struct { + // Test using `&Struct` explicitly: + + fn ref_Struct(self: &Struct, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_pin_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-struct.stderr b/src/test/ui/self/elision/ref-struct.stderr new file mode 100644 index 0000000000000..8a17ab13d5759 --- /dev/null +++ b/src/test/ui/self/elision/ref-struct.stderr @@ -0,0 +1,52 @@ +error[E0623]: lifetime mismatch + --> $DIR/ref-struct.rs:14:9 + | +LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-struct.rs:18:9 + | +LL | fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-struct.rs:22:9 + | +LL | fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-struct.rs:26:9 + | +LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error[E0623]: lifetime mismatch + --> $DIR/ref-struct.rs:30:9 + | +LL | fn box_pin_Struct(self: Box>, f: &u32) -> &u32 { + | ---- ---- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 5 previous errors + diff --git a/src/test/ui/self/elision/self.rs b/src/test/ui/self/elision/self.rs new file mode 100644 index 0000000000000..cfd1e79e975c3 --- /dev/null +++ b/src/test/ui/self/elision/self.rs @@ -0,0 +1,36 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +struct Struct { } + +impl Struct { + fn take_self(self, f: &u32) -> &u32 { + f + } + + fn take_Self(self: Self, f: &u32) -> &u32 { + f + } + + fn take_Box_Self(self: Box, f: &u32) -> &u32 { + f + } + + fn take_Box_Box_Self(self: Box>, f: &u32) -> &u32 { + f + } + + fn take_Rc_Self(self: Rc, f: &u32) -> &u32 { + f + } + + fn take_Box_Rc_Self(self: Box>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/struct.rs b/src/test/ui/self/elision/struct.rs new file mode 100644 index 0000000000000..efdeb121fed8a --- /dev/null +++ b/src/test/ui/self/elision/struct.rs @@ -0,0 +1,34 @@ +// run-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +struct Struct { } + +impl Struct { + // Test using `&mut Struct` explicitly: + + fn ref_Struct(self: Struct, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_Struct(self: Box, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn rc_Struct(self: Rc, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_box_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } + + fn box_rc_Struct(self: Box>, f: &u32) -> &u32 { + f //~ ERROR lifetime mismatch + } +} + +fn main() { } From 3f55d29221b2f41ad004faeabfcacb23aed83857 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Mon, 15 Jul 2019 17:59:22 +0900 Subject: [PATCH 06/12] Update src/test/ui/self/elision/README.md Co-Authored-By: Mazdak Farrokhzad --- src/test/ui/self/elision/README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/test/ui/self/elision/README.md b/src/test/ui/self/elision/README.md index de29a9d5e53bc..9e874e2753e93 100644 --- a/src/test/ui/self/elision/README.md +++ b/src/test/ui/self/elision/README.md @@ -1,4 +1,4 @@ -Test cases intended to to document behavior and tryto exhaustively +Test cases intended to to document behavior and try to exhaustively explore the combinations. ## Confidence From 857a8dd952ab1391d1a06282606f227734448a81 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Mon, 15 Jul 2019 18:25:09 +0900 Subject: [PATCH 07/12] Add main functions and check-pass annotations --- src/test/ui/self/arbitrary_self_types_pin_lifetime.rs | 2 +- src/test/ui/self/elision/alias.rs | 4 ++++ src/test/ui/self/elision/alias.stderr | 7 ------- src/test/ui/self/elision/lt-alias.rs | 2 +- src/test/ui/self/elision/lt-self.rs | 2 +- src/test/ui/self/elision/lt-struct.rs | 2 +- src/test/ui/self/elision/ref-alias.rs | 2 +- src/test/ui/self/elision/ref-mut-alias.rs | 4 ++++ src/test/ui/self/elision/ref-mut-alias.stderr | 7 ------- src/test/ui/self/elision/self.rs | 2 +- src/test/ui/self/elision/struct.rs | 2 +- src/test/ui/self/self_lifetime.rs | 2 +- 12 files changed, 16 insertions(+), 22 deletions(-) delete mode 100644 src/test/ui/self/elision/alias.stderr delete mode 100644 src/test/ui/self/elision/ref-mut-alias.stderr diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs index ba574eeb4609b..3002013881249 100644 --- a/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime.rs @@ -1,4 +1,4 @@ -// compile-pass +// check-pass use std::pin::Pin; use std::task::{Context, Poll}; diff --git a/src/test/ui/self/elision/alias.rs b/src/test/ui/self/elision/alias.rs index 6f113ec1a4bc9..b5aacfaeec427 100644 --- a/src/test/ui/self/elision/alias.rs +++ b/src/test/ui/self/elision/alias.rs @@ -1,3 +1,5 @@ +// check-pass + #![feature(arbitrary_self_types)] #![allow(non_snake_case)] @@ -30,3 +32,5 @@ impl Struct { f } } + +fn main() { } diff --git a/src/test/ui/self/elision/alias.stderr b/src/test/ui/self/elision/alias.stderr deleted file mode 100644 index a8f2a125b5eb7..0000000000000 --- a/src/test/ui/self/elision/alias.stderr +++ /dev/null @@ -1,7 +0,0 @@ -error[E0601]: `main` function not found in crate `alias` - | - = note: consider adding a `main` function to `$DIR/alias.rs` - -error: aborting due to previous error - -For more information about this error, try `rustc --explain E0601`. diff --git a/src/test/ui/self/elision/lt-alias.rs b/src/test/ui/self/elision/lt-alias.rs index 044682789007d..df2300deda25f 100644 --- a/src/test/ui/self/elision/lt-alias.rs +++ b/src/test/ui/self/elision/lt-alias.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/elision/lt-self.rs b/src/test/ui/self/elision/lt-self.rs index c33df08e0ee48..9b0ee5e42a51a 100644 --- a/src/test/ui/self/elision/lt-self.rs +++ b/src/test/ui/self/elision/lt-self.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/elision/lt-struct.rs b/src/test/ui/self/elision/lt-struct.rs index 79ffc8fd6f4bd..e41dfbbe0bf0d 100644 --- a/src/test/ui/self/elision/lt-struct.rs +++ b/src/test/ui/self/elision/lt-struct.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/elision/ref-alias.rs b/src/test/ui/self/elision/ref-alias.rs index 23bfe8fb029f6..d83ac612235e3 100644 --- a/src/test/ui/self/elision/ref-alias.rs +++ b/src/test/ui/self/elision/ref-alias.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/elision/ref-mut-alias.rs b/src/test/ui/self/elision/ref-mut-alias.rs index abb412965768d..395816f8f5d80 100644 --- a/src/test/ui/self/elision/ref-mut-alias.rs +++ b/src/test/ui/self/elision/ref-mut-alias.rs @@ -1,3 +1,5 @@ +// check-pass + #![feature(arbitrary_self_types)] #![allow(non_snake_case)] @@ -30,3 +32,5 @@ impl Struct { f } } + +fn main() { } diff --git a/src/test/ui/self/elision/ref-mut-alias.stderr b/src/test/ui/self/elision/ref-mut-alias.stderr deleted file mode 100644 index cf202ccaa5d88..0000000000000 --- a/src/test/ui/self/elision/ref-mut-alias.stderr +++ /dev/null @@ -1,7 +0,0 @@ -error[E0601]: `main` function not found in crate `ref_mut_alias` - | - = note: consider adding a `main` function to `$DIR/ref-mut-alias.rs` - -error: aborting due to previous error - -For more information about this error, try `rustc --explain E0601`. diff --git a/src/test/ui/self/elision/self.rs b/src/test/ui/self/elision/self.rs index cfd1e79e975c3..dbcef71ba14fc 100644 --- a/src/test/ui/self/elision/self.rs +++ b/src/test/ui/self/elision/self.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/elision/struct.rs b/src/test/ui/self/elision/struct.rs index efdeb121fed8a..f6e7c0fb129d5 100644 --- a/src/test/ui/self/elision/struct.rs +++ b/src/test/ui/self/elision/struct.rs @@ -1,4 +1,4 @@ -// run-pass +// check-pass #![feature(arbitrary_self_types)] #![allow(non_snake_case)] diff --git a/src/test/ui/self/self_lifetime.rs b/src/test/ui/self/self_lifetime.rs index a3163ade0404f..edb47fd4d327c 100644 --- a/src/test/ui/self/self_lifetime.rs +++ b/src/test/ui/self/self_lifetime.rs @@ -1,4 +1,4 @@ -// compile-pass +// check-pass struct Foo<'a>(&'a ()); impl<'a> Foo<'a> { From dc04a4e4d2bbda6ad47ed17434744196137a8f85 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Tue, 16 Jul 2019 00:48:28 +0900 Subject: [PATCH 08/12] Minor clean up --- src/test/ui/self/elision/README.md | 9 ++++----- src/test/ui/self/elision/ref-mut-self.rs | 2 -- src/test/ui/self/elision/ref-mut-self.stderr | 12 ++++++------ src/test/ui/self/elision/ref-mut-struct.rs | 2 -- src/test/ui/self/elision/ref-mut-struct.stderr | 10 +++++----- src/test/ui/self/elision/ref-self.rs | 2 -- src/test/ui/self/elision/ref-struct.rs | 2 -- src/test/ui/self/elision/ref-struct.stderr | 10 +++++----- src/test/ui/self/elision/struct.rs | 12 +++++------- src/test/ui/self/self_lifetime.rs | 2 ++ 10 files changed, 27 insertions(+), 36 deletions(-) diff --git a/src/test/ui/self/elision/README.md b/src/test/ui/self/elision/README.md index 9e874e2753e93..793eb16b0377c 100644 --- a/src/test/ui/self/elision/README.md +++ b/src/test/ui/self/elision/README.md @@ -1,5 +1,5 @@ Test cases intended to to document behavior and try to exhaustively -explore the combinations. +explore the combinations. ## Confidence @@ -23,11 +23,11 @@ in the "confidence" field in the following table. Values: | `struct.rs` | `Struct` | `Struct` | ignore `self` parameter | 100% | | `alias.rs` | `Struct` | `Alias` | ignore `self` parameter | 100% | | `ref-self.rs` | `Struct` | `&Self` | take lifetime from `&Self` | 100% | -| `ref-mut-self.rs` | `Struct` | `&mut Self` | take lifetime from `&Self` | 100% | +| `ref-mut-self.rs` | `Struct` | `&mut Self` | take lifetime from `&mut Self` | 100% | | `ref-struct.rs` | `Struct` | `&Struct` | take lifetime from `&Self` | 50% | -| `ref-mut-struct.rs` | `Struct` | `&Struct` | take lifetime from `&Self` | 50% | +| `ref-mut-struct.rs` | `Struct` | `&mut Struct` | take lifetime from `&mut Self` | 50% | | `ref-alias.rs` | `Struct` | `&Alias` | ignore `Alias` | 0% | -| `ref-mut-alias.rs` | `Struct` | `&Alias` | ignore `Alias` | 0% | +| `ref-mut-alias.rs` | `Struct` | `&mut Alias` | ignore `Alias` | 0% | | `lt-self.rs` | `Struct<'a>` | `Self` | ignore `Self` (and hence `'a`) | 25% | | `lt-struct.rs` | `Struct<'a>` | `Self` | ignore `Self` (and hence `'a`) | 0% | | `lt-alias.rs` | `Alias<'a>` | `Self` | ignore `Self` (and hence `'a`) | 0% | @@ -42,4 +42,3 @@ In each case, we test the following patterns: - `self: Box>` In the non-reference cases, `Pin` causes errors so we substitute `Rc`. - diff --git a/src/test/ui/self/elision/ref-mut-self.rs b/src/test/ui/self/elision/ref-mut-self.rs index 6705ca9e30598..a7ea47bb7f6de 100644 --- a/src/test/ui/self/elision/ref-mut-self.rs +++ b/src/test/ui/self/elision/ref-mut-self.rs @@ -5,8 +5,6 @@ use std::pin::Pin; struct Struct { } -type Alias = Struct; - impl Struct { // Test using `&mut self` sugar: diff --git a/src/test/ui/self/elision/ref-mut-self.stderr b/src/test/ui/self/elision/ref-mut-self.stderr index 05dc5b774c832..37984cd72fbac 100644 --- a/src/test/ui/self/elision/ref-mut-self.stderr +++ b/src/test/ui/self/elision/ref-mut-self.stderr @@ -1,5 +1,5 @@ error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:14:9 + --> $DIR/ref-mut-self.rs:12:9 | LL | fn ref_self(&mut self, f: &u32) -> &u32 { | ---- ---- @@ -9,7 +9,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:20:9 + --> $DIR/ref-mut-self.rs:18:9 | LL | fn ref_Self(self: &mut Self, f: &u32) -> &u32 { | ---- ---- @@ -19,7 +19,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:24:9 + --> $DIR/ref-mut-self.rs:22:9 | LL | fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 { | ---- ---- @@ -29,7 +29,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:28:9 + --> $DIR/ref-mut-self.rs:26:9 | LL | fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 { | ---- ---- @@ -39,7 +39,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:32:9 + --> $DIR/ref-mut-self.rs:30:9 | LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- @@ -49,7 +49,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-self.rs:36:9 + --> $DIR/ref-mut-self.rs:34:9 | LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- diff --git a/src/test/ui/self/elision/ref-mut-struct.rs b/src/test/ui/self/elision/ref-mut-struct.rs index f063728e24751..795ddf8ac1354 100644 --- a/src/test/ui/self/elision/ref-mut-struct.rs +++ b/src/test/ui/self/elision/ref-mut-struct.rs @@ -5,8 +5,6 @@ use std::pin::Pin; struct Struct { } -type Alias = Struct; - impl Struct { // Test using `&mut Struct` explicitly: diff --git a/src/test/ui/self/elision/ref-mut-struct.stderr b/src/test/ui/self/elision/ref-mut-struct.stderr index 88dfb17892a2f..2a4826905b94a 100644 --- a/src/test/ui/self/elision/ref-mut-struct.stderr +++ b/src/test/ui/self/elision/ref-mut-struct.stderr @@ -1,5 +1,5 @@ error[E0623]: lifetime mismatch - --> $DIR/ref-mut-struct.rs:14:9 + --> $DIR/ref-mut-struct.rs:12:9 | LL | fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 { | ---- ---- @@ -9,7 +9,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-struct.rs:18:9 + --> $DIR/ref-mut-struct.rs:16:9 | LL | fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 { | ---- ---- @@ -19,7 +19,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-struct.rs:22:9 + --> $DIR/ref-mut-struct.rs:20:9 | LL | fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 { | ---- ---- @@ -29,7 +29,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-struct.rs:26:9 + --> $DIR/ref-mut-struct.rs:24:9 | LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { | ---- ---- @@ -39,7 +39,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-mut-struct.rs:30:9 + --> $DIR/ref-mut-struct.rs:28:9 | LL | fn box_pin_ref_Struct(self: Box>, f: &u32) -> &u32 { | ---- ---- diff --git a/src/test/ui/self/elision/ref-self.rs b/src/test/ui/self/elision/ref-self.rs index af10e10d3111c..9655c11f45e2c 100644 --- a/src/test/ui/self/elision/ref-self.rs +++ b/src/test/ui/self/elision/ref-self.rs @@ -5,8 +5,6 @@ use std::pin::Pin; struct Struct { } -type Alias = Struct; - impl Struct { // Test using `&self` sugar: diff --git a/src/test/ui/self/elision/ref-struct.rs b/src/test/ui/self/elision/ref-struct.rs index 28afe17c23467..342d6d2b36357 100644 --- a/src/test/ui/self/elision/ref-struct.rs +++ b/src/test/ui/self/elision/ref-struct.rs @@ -5,8 +5,6 @@ use std::pin::Pin; struct Struct { } -type Alias = Struct; - impl Struct { // Test using `&Struct` explicitly: diff --git a/src/test/ui/self/elision/ref-struct.stderr b/src/test/ui/self/elision/ref-struct.stderr index 8a17ab13d5759..186e651c143bf 100644 --- a/src/test/ui/self/elision/ref-struct.stderr +++ b/src/test/ui/self/elision/ref-struct.stderr @@ -1,5 +1,5 @@ error[E0623]: lifetime mismatch - --> $DIR/ref-struct.rs:14:9 + --> $DIR/ref-struct.rs:12:9 | LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { | ---- ---- @@ -9,7 +9,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-struct.rs:18:9 + --> $DIR/ref-struct.rs:16:9 | LL | fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 { | ---- ---- @@ -19,7 +19,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-struct.rs:22:9 + --> $DIR/ref-struct.rs:20:9 | LL | fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 { | ---- ---- @@ -29,7 +29,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-struct.rs:26:9 + --> $DIR/ref-struct.rs:24:9 | LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { | ---- ---- @@ -39,7 +39,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-struct.rs:30:9 + --> $DIR/ref-struct.rs:28:9 | LL | fn box_pin_Struct(self: Box>, f: &u32) -> &u32 { | ---- ---- diff --git a/src/test/ui/self/elision/struct.rs b/src/test/ui/self/elision/struct.rs index f6e7c0fb129d5..227e993bd3c61 100644 --- a/src/test/ui/self/elision/struct.rs +++ b/src/test/ui/self/elision/struct.rs @@ -8,26 +8,24 @@ use std::rc::Rc; struct Struct { } impl Struct { - // Test using `&mut Struct` explicitly: - fn ref_Struct(self: Struct, f: &u32) -> &u32 { - f //~ ERROR lifetime mismatch + f } fn box_Struct(self: Box, f: &u32) -> &u32 { - f //~ ERROR lifetime mismatch + f } fn rc_Struct(self: Rc, f: &u32) -> &u32 { - f //~ ERROR lifetime mismatch + f } fn box_box_Struct(self: Box>, f: &u32) -> &u32 { - f //~ ERROR lifetime mismatch + f } fn box_rc_Struct(self: Box>, f: &u32) -> &u32 { - f //~ ERROR lifetime mismatch + f } } diff --git a/src/test/ui/self/self_lifetime.rs b/src/test/ui/self/self_lifetime.rs index edb47fd4d327c..f04bd83ab6e4c 100644 --- a/src/test/ui/self/self_lifetime.rs +++ b/src/test/ui/self/self_lifetime.rs @@ -1,5 +1,7 @@ // check-pass +// https://github.com/rust-lang/rust/pull/60944#issuecomment-495346120 + struct Foo<'a>(&'a ()); impl<'a> Foo<'a> { fn foo<'b>(self: &'b Foo<'a>) -> &() { self.0 } From f916aa995a40e4b23712f5f176eef287b2fa09cd Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Tue, 16 Jul 2019 01:09:25 +0900 Subject: [PATCH 09/12] Add test for multiple ref-self --- src/test/ui/self/elision/multiple-ref-self.rs | 43 +++++++++++++++++++ src/test/ui/self/elision/ref-self.rs | 13 ++++++ src/test/ui/self/elision/ref-self.stderr | 24 ++++++++--- 3 files changed, 73 insertions(+), 7 deletions(-) create mode 100644 src/test/ui/self/elision/multiple-ref-self.rs diff --git a/src/test/ui/self/elision/multiple-ref-self.rs b/src/test/ui/self/elision/multiple-ref-self.rs new file mode 100644 index 0000000000000..f39613d0c9007 --- /dev/null +++ b/src/test/ui/self/elision/multiple-ref-self.rs @@ -0,0 +1,43 @@ +// check-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::marker::PhantomData; +use std::ops::Deref; +use std::pin::Pin; + +struct Struct { } + +struct Wrap(T, PhantomData

); + +impl Deref for Wrap { + type Target = T; + fn deref(&self) -> &T { &self.0 } +} + +impl Struct { + // Test using multiple `&Self`: + + fn wrap_ref_Self_ref_Self(self: Wrap<&Self, &Self>, f: &u8) -> &u8 { + f + } + + fn box_wrap_ref_Self_ref_Self(self: Box>, f: &u32) -> &u32 { + f + } + + fn pin_wrap_ref_Self_ref_Self(self: Pin>, f: &u32) -> &u32 { + f + } + + fn box_box_wrap_ref_Self_ref_Self(self: Box>>, f: &u32) -> &u32 { + f + } + + fn box_pin_wrap_ref_Self_ref_Self(self: Box>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-self.rs b/src/test/ui/self/elision/ref-self.rs index 9655c11f45e2c..e389d8518ada4 100644 --- a/src/test/ui/self/elision/ref-self.rs +++ b/src/test/ui/self/elision/ref-self.rs @@ -1,10 +1,19 @@ #![feature(arbitrary_self_types)] #![allow(non_snake_case)] +use std::marker::PhantomData; +use std::ops::Deref; use std::pin::Pin; struct Struct { } +struct Wrap(T, PhantomData

); + +impl Deref for Wrap { + type Target = T; + fn deref(&self) -> &T { &self.0 } +} + impl Struct { // Test using `&self` sugar: @@ -33,6 +42,10 @@ impl Struct { fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { f //~ ERROR lifetime mismatch } + + fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 { + f //~ ERROR lifetime mismatch + } } fn main() { } diff --git a/src/test/ui/self/elision/ref-self.stderr b/src/test/ui/self/elision/ref-self.stderr index 10131cc5935a5..611498f18da42 100644 --- a/src/test/ui/self/elision/ref-self.stderr +++ b/src/test/ui/self/elision/ref-self.stderr @@ -1,5 +1,5 @@ error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:14:9 + --> $DIR/ref-self.rs:21:9 | LL | fn ref_self(&self, f: &u32) -> &u32 { | ---- ---- @@ -9,7 +9,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:20:9 + --> $DIR/ref-self.rs:27:9 | LL | fn ref_Self(self: &Self, f: &u32) -> &u32 { | ---- ---- @@ -19,7 +19,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:24:9 + --> $DIR/ref-self.rs:31:9 | LL | fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { | ---- ---- @@ -29,7 +29,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:28:9 + --> $DIR/ref-self.rs:35:9 | LL | fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { | ---- ---- @@ -39,7 +39,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:32:9 + --> $DIR/ref-self.rs:39:9 | LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- @@ -49,7 +49,7 @@ LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch - --> $DIR/ref-self.rs:36:9 + --> $DIR/ref-self.rs:43:9 | LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- @@ -58,5 +58,15 @@ LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { LL | f | ^ ...but data from `f` is returned here -error: aborting due to 6 previous errors +error[E0623]: lifetime mismatch + --> $DIR/ref-self.rs:47:9 + | +LL | fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 { + | --- --- + | | + | this parameter and the return type are declared with different lifetimes... +LL | f + | ^ ...but data from `f` is returned here + +error: aborting due to 7 previous errors From fdf1cc41616cc5bbbf12aa98a34c79efb999632d Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Fri, 26 Jul 2019 15:20:04 +0900 Subject: [PATCH 10/12] Add tests for `self: (&)AssocType` --- src/test/ui/self/elision/assoc.rs | 40 ++++++++++++++++++++++++ src/test/ui/self/elision/lt-assoc.rs | 44 +++++++++++++++++++++++++++ src/test/ui/self/elision/ref-assoc.rs | 40 ++++++++++++++++++++++++ 3 files changed, 124 insertions(+) create mode 100644 src/test/ui/self/elision/assoc.rs create mode 100644 src/test/ui/self/elision/lt-assoc.rs create mode 100644 src/test/ui/self/elision/ref-assoc.rs diff --git a/src/test/ui/self/elision/assoc.rs b/src/test/ui/self/elision/assoc.rs new file mode 100644 index 0000000000000..163eb49383a87 --- /dev/null +++ b/src/test/ui/self/elision/assoc.rs @@ -0,0 +1,40 @@ +// check-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +trait Trait { + type AssocType; +} + +struct Struct { } + +impl Trait for Struct { + type AssocType = Self; +} + +impl Struct { + fn assoc(self: ::AssocType, f: &u32) -> &u32 { + f + } + + fn box_AssocType(self: Box<::AssocType>, f: &u32) -> &u32 { + f + } + + fn rc_AssocType(self: Rc<::AssocType>, f: &u32) -> &u32 { + f + } + + fn box_box_AssocType(self: Box::AssocType>>, f: &u32) -> &u32 { + f + } + + fn box_rc_AssocType(self: Box::AssocType>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/lt-assoc.rs b/src/test/ui/self/elision/lt-assoc.rs new file mode 100644 index 0000000000000..70573598fcb16 --- /dev/null +++ b/src/test/ui/self/elision/lt-assoc.rs @@ -0,0 +1,44 @@ +// check-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::rc::Rc; + +trait Trait { + type AssocType; +} + +struct Struct<'a> { x: &'a u32 } + +impl<'a> Trait for Struct<'a> { + type AssocType = Self; +} + +impl<'a> Struct<'a> { + fn take_self(self, f: &u32) -> &u32 { + f + } + + fn take_AssocType(self: as Trait>::AssocType, f: &u32) -> &u32 { + f + } + + fn take_Box_AssocType(self: Box< as Trait>::AssocType>, f: &u32) -> &u32 { + f + } + + fn take_Box_Box_AssocType(self: Box as Trait>::AssocType>>, f: &u32) -> &u32 { + f + } + + fn take_Rc_AssocType(self: Rc< as Trait>::AssocType>, f: &u32) -> &u32 { + f + } + + fn take_Box_Rc_AssocType(self: Box as Trait>::AssocType>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } diff --git a/src/test/ui/self/elision/ref-assoc.rs b/src/test/ui/self/elision/ref-assoc.rs new file mode 100644 index 0000000000000..f9354bc884710 --- /dev/null +++ b/src/test/ui/self/elision/ref-assoc.rs @@ -0,0 +1,40 @@ +// check-pass + +#![feature(arbitrary_self_types)] +#![allow(non_snake_case)] + +use std::pin::Pin; + +trait Trait { + type AssocType; +} + +struct Struct { } + +impl Trait for Struct { + type AssocType = Self; +} + +impl Struct { + fn ref_AssocType(self: &::AssocType, f: &u32) -> &u32 { + f + } + + fn box_ref_AssocType(self: Box<&::AssocType>, f: &u32) -> &u32 { + f + } + + fn pin_ref_AssocType(self: Pin<&::AssocType>, f: &u32) -> &u32 { + f + } + + fn box_box_ref_AssocType(self: Box::AssocType>>, f: &u32) -> &u32 { + f + } + + fn box_pin_ref_AssocType(self: Box::AssocType>>, f: &u32) -> &u32 { + f + } +} + +fn main() { } From 62a1c115045ad887c73053c7e3b9ba9d13e86aa2 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Fri, 26 Jul 2019 15:41:00 +0900 Subject: [PATCH 11/12] Fix typo --- src/test/ui/self/elision/README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/test/ui/self/elision/README.md b/src/test/ui/self/elision/README.md index 793eb16b0377c..7ace2e0c89039 100644 --- a/src/test/ui/self/elision/README.md +++ b/src/test/ui/self/elision/README.md @@ -1,4 +1,4 @@ -Test cases intended to to document behavior and try to exhaustively +Test cases intended to document behavior and try to exhaustively explore the combinations. ## Confidence From d27529f79c999b779f02a06e23a754e3c242a774 Mon Sep 17 00:00:00 2001 From: Taiki Endo Date: Sat, 27 Jul 2019 12:35:05 +0900 Subject: [PATCH 12/12] arbitrary_self_types lifetime elision: --bless --compare-mode=nll --- ...f_types_pin_lifetime_impl_trait.nll.stderr | 14 ++++ ...elf_types_pin_lifetime_mismatch.nll.stderr | 28 ++++++++ .../ui/self/elision/lt-ref-self.nll.stderr | 62 ++++++++++++++++ .../ui/self/elision/ref-mut-self.nll.stderr | 62 ++++++++++++++++ .../ui/self/elision/ref-mut-struct.nll.stderr | 52 ++++++++++++++ src/test/ui/self/elision/ref-self.nll.stderr | 72 +++++++++++++++++++ .../ui/self/elision/ref-struct.nll.stderr | 52 ++++++++++++++ 7 files changed, 342 insertions(+) create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.nll.stderr create mode 100644 src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.nll.stderr create mode 100644 src/test/ui/self/elision/lt-ref-self.nll.stderr create mode 100644 src/test/ui/self/elision/ref-mut-self.nll.stderr create mode 100644 src/test/ui/self/elision/ref-mut-struct.nll.stderr create mode 100644 src/test/ui/self/elision/ref-self.nll.stderr create mode 100644 src/test/ui/self/elision/ref-struct.nll.stderr diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.nll.stderr b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.nll.stderr new file mode 100644 index 0000000000000..dcfc9ba511d74 --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.nll.stderr @@ -0,0 +1,14 @@ +error: lifetime may not live long enough + --> $DIR/arbitrary_self_types_pin_lifetime_impl_trait.rs:8:31 + | +LL | fn f(self: Pin<&Self>) -> impl Clone { self } + | - ^^^^^^^^^^ opaque type requires that `'1` must outlive `'static` + | | + | let's call the lifetime of this reference `'1` +help: to allow this `impl Trait` to capture borrowed data with lifetime `'1`, add `'_` as a constraint + | +LL | fn f(self: Pin<&Self>) -> impl Clone + '_ { self } + | ^^^^^^^^^^^^^^^ + +error: aborting due to previous error + diff --git a/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.nll.stderr b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.nll.stderr new file mode 100644 index 0000000000000..8a0f1a804ad82 --- /dev/null +++ b/src/test/ui/self/arbitrary_self_types_pin_lifetime_mismatch.nll.stderr @@ -0,0 +1,28 @@ +error: lifetime may not live long enough + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:8:46 + | +LL | fn a(self: Pin<&Foo>, f: &Foo) -> &Foo { f } + | - - ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + | | | + | | let's call the lifetime of this reference `'1` + | let's call the lifetime of this reference `'2` + +error: lifetime may not live long enough + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:10:69 + | +LL | fn c(self: Pin<&Self>, f: &Foo, g: &Foo) -> (Pin<&Foo>, &Foo) { (self, f) } + | - - ^^^^^^^^^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + | | | + | | let's call the lifetime of this reference `'1` + | let's call the lifetime of this reference `'2` + +error: lifetime may not live long enough + --> $DIR/arbitrary_self_types_pin_lifetime_mismatch.rs:15:58 + | +LL | fn bar<'a>(self: Alias<&Self>, arg: &'a ()) -> &() { arg } + | -- ---- has type `std::pin::Pin<&'1 Foo>` ^^^ function was supposed to return data with lifetime `'1` but it is returning data with lifetime `'a` + | | + | lifetime `'a` defined here + +error: aborting due to 3 previous errors + diff --git a/src/test/ui/self/elision/lt-ref-self.nll.stderr b/src/test/ui/self/elision/lt-ref-self.nll.stderr new file mode 100644 index 0000000000000..e97a01e746d4b --- /dev/null +++ b/src/test/ui/self/elision/lt-ref-self.nll.stderr @@ -0,0 +1,62 @@ +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:12:9 + | +LL | fn ref_self(&self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:18:9 + | +LL | fn ref_Self(self: &Self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:22:9 + | +LL | fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:26:9 + | +LL | fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:30:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/lt-ref-self.rs:34:9 + | +LL | fn box_pin_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: aborting due to 6 previous errors + diff --git a/src/test/ui/self/elision/ref-mut-self.nll.stderr b/src/test/ui/self/elision/ref-mut-self.nll.stderr new file mode 100644 index 0000000000000..3a8ae3fdcba8c --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-self.nll.stderr @@ -0,0 +1,62 @@ +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:12:9 + | +LL | fn ref_self(&mut self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:18:9 + | +LL | fn ref_Self(self: &mut Self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:22:9 + | +LL | fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:26:9 + | +LL | fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:30:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-self.rs:34:9 + | +LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: aborting due to 6 previous errors + diff --git a/src/test/ui/self/elision/ref-mut-struct.nll.stderr b/src/test/ui/self/elision/ref-mut-struct.nll.stderr new file mode 100644 index 0000000000000..66152ba40a5f5 --- /dev/null +++ b/src/test/ui/self/elision/ref-mut-struct.nll.stderr @@ -0,0 +1,52 @@ +error: lifetime may not live long enough + --> $DIR/ref-mut-struct.rs:12:9 + | +LL | fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-struct.rs:16:9 + | +LL | fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-struct.rs:20:9 + | +LL | fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-struct.rs:24:9 + | +LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-mut-struct.rs:28:9 + | +LL | fn box_pin_ref_Struct(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: aborting due to 5 previous errors + diff --git a/src/test/ui/self/elision/ref-self.nll.stderr b/src/test/ui/self/elision/ref-self.nll.stderr new file mode 100644 index 0000000000000..20045be0527a4 --- /dev/null +++ b/src/test/ui/self/elision/ref-self.nll.stderr @@ -0,0 +1,72 @@ +error: lifetime may not live long enough + --> $DIR/ref-self.rs:21:9 + | +LL | fn ref_self(&self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:27:9 + | +LL | fn ref_Self(self: &Self, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:31:9 + | +LL | fn box_ref_Self(self: Box<&Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:35:9 + | +LL | fn pin_ref_Self(self: Pin<&Self>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:39:9 + | +LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:43:9 + | +LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-self.rs:47:9 + | +LL | fn wrap_ref_Self_Self(self: Wrap<&Self, Self>, f: &u8) -> &u8 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: aborting due to 7 previous errors + diff --git a/src/test/ui/self/elision/ref-struct.nll.stderr b/src/test/ui/self/elision/ref-struct.nll.stderr new file mode 100644 index 0000000000000..a258bc9f74390 --- /dev/null +++ b/src/test/ui/self/elision/ref-struct.nll.stderr @@ -0,0 +1,52 @@ +error: lifetime may not live long enough + --> $DIR/ref-struct.rs:12:9 + | +LL | fn ref_Struct(self: &Struct, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-struct.rs:16:9 + | +LL | fn box_ref_Struct(self: Box<&Struct>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-struct.rs:20:9 + | +LL | fn pin_ref_Struct(self: Pin<&Struct>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-struct.rs:24:9 + | +LL | fn box_box_ref_Struct(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: lifetime may not live long enough + --> $DIR/ref-struct.rs:28:9 + | +LL | fn box_pin_Struct(self: Box>, f: &u32) -> &u32 { + | - - let's call the lifetime of this reference `'1` + | | + | let's call the lifetime of this reference `'2` +LL | f + | ^ function was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1` + +error: aborting due to 5 previous errors +