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Re-enable ConstArgKind::Path lowering by default

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...and remove the `const_arg_path` feature gate as a result. It was only
a stopgap measure to fix the regression that the new lowering introduced
(which should now be fixed by this PR).
This commit is contained in:
Noah Lev 2024-09-08 01:49:25 -04:00
parent 8b75004bca
commit e0bd01167e
34 changed files with 69 additions and 203 deletions
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4
compiler/rustc_ast_lowering/src/asm.rs
View File

@ -220,9 +220,7 @@ pub(crate) fn lower_inline_asm(
let parent_def_id = self.current_def_id_parent;
let node_id = self.next_node_id();
// HACK(min_generic_const_args): see lower_anon_const
if !self.tcx.features().const_arg_path
|| !expr.is_potential_trivial_const_arg()
{
if !expr.is_potential_trivial_const_arg() {
self.create_def(
parent_def_id,
node_id,

2
compiler/rustc_ast_lowering/src/expr.rs
View File

@ -387,7 +387,7 @@ fn lower_legacy_const_generics(
let node_id = self.next_node_id();
// HACK(min_generic_const_args): see lower_anon_const
if !self.tcx.features().const_arg_path || !arg.is_potential_trivial_const_arg() {
if !arg.is_potential_trivial_const_arg() {
// Add a definition for the in-band const def.
self.create_def(parent_def_id, node_id, kw::Empty, DefKind::AnonConst, f.span);
}

7
compiler/rustc_ast_lowering/src/lib.rs
View File

@ -2335,7 +2335,7 @@ fn lower_const_path_to_const_arg(
span: Span,
) -> &'hir hir::ConstArg<'hir> {
let ct_kind = match res {
Res::Def(DefKind::ConstParam, _) if self.tcx.features().const_arg_path => {
Res::Def(DefKind::ConstParam, _) => {
let qpath = self.lower_qpath(
ty_id,
&None,
@ -2410,8 +2410,7 @@ fn lower_anon_const_to_const_arg_direct(&mut self, anon: &AnonConst) -> hir::Con
self.resolver.get_partial_res(expr.id).and_then(|partial_res| partial_res.full_res());
debug!("res={:?}", maybe_res);
// FIXME(min_generic_const_args): for now we only lower params to ConstArgKind::Path
if self.tcx.features().const_arg_path
&& let Some(res) = maybe_res
if let Some(res) = maybe_res
&& let Res::Def(DefKind::ConstParam, _) = res
&& let ExprKind::Path(qself, path) = &expr.kind
{
@ -2442,7 +2441,7 @@ fn lower_anon_const_to_const_arg_direct(&mut self, anon: &AnonConst) -> hir::Con
/// See [`hir::ConstArg`] for when to use this function vs
/// [`Self::lower_anon_const_to_const_arg`].
fn lower_anon_const_to_anon_const(&mut self, c: &AnonConst) -> &'hir hir::AnonConst {
if self.tcx.features().const_arg_path && c.value.is_potential_trivial_const_arg() {
if c.value.is_potential_trivial_const_arg() {
// HACK(min_generic_const_args): see DefCollector::visit_anon_const
// Over there, we guess if this is a bare param and only create a def if
// we think it's not. However we may can guess wrong (see there for example)

2
compiler/rustc_feature/src/unstable.rs
View File

@ -193,8 +193,6 @@ pub fn internal(&self, feature: Symbol) -> bool {
(unstable, anonymous_lifetime_in_impl_trait, "1.63.0", None),
/// Allows identifying the `compiler_builtins` crate.
(internal, compiler_builtins, "1.13.0", None),
/// Gating for a new desugaring of const arguments of usages of const parameters
(internal, const_arg_path, "1.81.0", None),
/// Allows writing custom MIR
(internal, custom_mir, "1.65.0", None),
/// Outputs useful `assert!` messages

18
compiler/rustc_middle/src/ty/consts.rs
View File

@ -295,20 +295,12 @@ fn try_from_lit_or_param(
_ => expr,
};
if let hir::ExprKind::Path(
qpath @ hir::QPath::Resolved(
_,
&hir::Path { res: Res::Def(DefKind::ConstParam, _), .. },
),
) = expr.kind
if let hir::ExprKind::Path(hir::QPath::Resolved(
_,
&hir::Path { res: Res::Def(DefKind::ConstParam, _), .. },
)) = expr.kind
{
if tcx.features().const_arg_path {
span_bug!(
expr.span,
"try_from_lit: received const param which shouldn't be possible"
);
}
return Some(Const::from_param(tcx, qpath, expr.hir_id));
span_bug!(expr.span, "try_from_lit: received const param which shouldn't be possible");
};
let lit_input = match expr.kind {

28
compiler/rustc_resolve/src/def_collector.rs
View File

@ -347,22 +347,20 @@ fn visit_pat(&mut self, pat: &'a Pat) {
}
fn visit_anon_const(&mut self, constant: &'a AnonConst) {
if self.resolver.tcx.features().const_arg_path {
// HACK(min_generic_const_args): don't create defs for anon consts if we think they will
// later be turned into ConstArgKind::Path's. because this is before resolve is done, we
// may accidentally identify a construction of a unit struct as a param and not create a
// def. we'll then create a def later in ast lowering in this case. the parent of nested
// items will be messed up, but that's ok because there can't be any if we're just looking
// for bare idents.
// HACK(min_generic_const_args): don't create defs for anon consts if we think they will
// later be turned into ConstArgKind::Path's. because this is before resolve is done, we
// may accidentally identify a construction of a unit struct as a param and not create a
// def. we'll then create a def later in ast lowering in this case. the parent of nested
// items will be messed up, but that's ok because there can't be any if we're just looking
// for bare idents.
if matches!(constant.value.maybe_unwrap_block().kind, ExprKind::MacCall(..)) {
// See self.pending_anon_const_info for explanation
self.pending_anon_const_info =
Some(PendingAnonConstInfo { id: constant.id, span: constant.value.span });
return visit::walk_anon_const(self, constant);
} else if constant.value.is_potential_trivial_const_arg() {
return visit::walk_anon_const(self, constant);
}
if matches!(constant.value.maybe_unwrap_block().kind, ExprKind::MacCall(..)) {
// See self.pending_anon_const_info for explanation
self.pending_anon_const_info =
Some(PendingAnonConstInfo { id: constant.id, span: constant.value.span });
return visit::walk_anon_const(self, constant);
} else if constant.value.is_potential_trivial_const_arg() {
return visit::walk_anon_const(self, constant);
}
let def = self.create_def(constant.id, kw::Empty, DefKind::AnonConst, constant.value.span);

1
compiler/rustc_span/src/symbol.rs
View File

@ -599,7 +599,6 @@
conservative_impl_trait,
console,
const_allocate,
const_arg_path,
const_async_blocks,
const_closures,
const_compare_raw_pointers,

2
tests/ui-fulldeps/stable-mir/check_instance.rs
View File

@ -35,7 +35,7 @@ fn test_stable_mir() -> ControlFlow<()> {
// Get all items and split generic vs monomorphic items.
let (generic, mono): (Vec<_>, Vec<_>) =
items.into_iter().partition(|item| item.requires_monomorphization());
assert_eq!(mono.len(), 4, "Expected 3 mono functions");
assert_eq!(mono.len(), 3, "Expected 3 mono functions");
assert_eq!(generic.len(), 2, "Expected 2 generic functions");
// For all monomorphic items, get the correspondent instances.

2
tests/ui/coherence/negative-coherence/generic_const_type_mismatch.rs
View File

@ -5,9 +5,7 @@
#![feature(with_negative_coherence)]
trait Trait {}
impl<const N: u8> Trait for [(); N] {}
//~^ ERROR: mismatched types
impl<const N: i8> Trait for [(); N] {}
//~^ ERROR: conflicting implementations of trait `Trait`
//~| ERROR: mismatched types
fn main() {}

20
tests/ui/coherence/negative-coherence/generic_const_type_mismatch.stderr
View File

@ -1,25 +1,11 @@
error[E0119]: conflicting implementations of trait `Trait` for type `[(); _]`
--> $DIR/generic_const_type_mismatch.rs:9:1
--> $DIR/generic_const_type_mismatch.rs:8:1
|
LL | impl<const N: u8> Trait for [(); N] {}
| ----------------------------------- first implementation here
LL |
LL | impl<const N: i8> Trait for [(); N] {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `[(); _]`
error[E0308]: mismatched types
--> $DIR/generic_const_type_mismatch.rs:7:34
|
LL | impl<const N: u8> Trait for [(); N] {}
| ^ expected `usize`, found `u8`
error: aborting due to 1 previous error
error[E0308]: mismatched types
--> $DIR/generic_const_type_mismatch.rs:9:34
|
LL | impl<const N: i8> Trait for [(); N] {}
| ^ expected `usize`, found `i8`
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0119, E0308.
For more information about an error, try `rustc --explain E0119`.
For more information about this error, try `rustc --explain E0119`.

1
tests/ui/const-generics/bad-subst-const-kind.rs
View File

@ -7,7 +7,6 @@ trait Q {
impl<const N: u64> Q for [u8; N] {
//~^ ERROR: the constant `N` is not of type `usize`
//~| ERROR: mismatched types
const ASSOC: usize = 1;
}

11
tests/ui/const-generics/bad-subst-const-kind.stderr
View File

@ -5,7 +5,7 @@ LL | impl<const N: u64> Q for [u8; N] {
| ^^^^^^^ expected `usize`, found `u64`
error: the constant `13` is not of type `u64`
--> $DIR/bad-subst-const-kind.rs:14:24
--> $DIR/bad-subst-const-kind.rs:13:24
|
LL | pub fn test() -> [u8; <[u8; 13] as Q>::ASSOC] {
| ^^^^^^^^ expected `u64`, found `usize`
@ -18,12 +18,5 @@ LL | impl<const N: u64> Q for [u8; N] {
| |
| unsatisfied trait bound introduced here
error[E0308]: mismatched types
--> $DIR/bad-subst-const-kind.rs:8:31
|
LL | impl<const N: u64> Q for [u8; N] {
| ^ expected `usize`, found `u64`
error: aborting due to 2 previous errors
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0308`.

1
tests/ui/const-generics/generic_const_exprs/type_mismatch.rs
View File

@ -8,7 +8,6 @@ trait Q {
impl<const N: u64> Q for [u8; N] {}
//~^ ERROR not all trait items implemented
//~| ERROR the constant `N` is not of type `usize`
//~| ERROR mismatched types
pub fn q_user() -> [u8; <[u8; 13] as Q>::ASSOC] {}
//~^ ERROR the constant `13` is not of type `u64`

12
tests/ui/const-generics/generic_const_exprs/type_mismatch.stderr
View File

@ -14,7 +14,7 @@ LL | impl<const N: u64> Q for [u8; N] {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `ASSOC` in implementation
error: the constant `13` is not of type `u64`
--> $DIR/type_mismatch.rs:13:26
--> $DIR/type_mismatch.rs:12:26
|
LL | pub fn q_user() -> [u8; <[u8; 13] as Q>::ASSOC] {}
| ^^^^^^^^ expected `u64`, found `usize`
@ -28,20 +28,14 @@ LL | impl<const N: u64> Q for [u8; N] {}
| unsatisfied trait bound introduced here
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:13:20
--> $DIR/type_mismatch.rs:12:20
|
LL | pub fn q_user() -> [u8; <[u8; 13] as Q>::ASSOC] {}
| ------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `[u8; <[u8; 13] as Q>::ASSOC]`, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:8:31
|
LL | impl<const N: u64> Q for [u8; N] {}
| ^ expected `usize`, found `u64`
error: aborting due to 5 previous errors
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0046, E0308.
For more information about an error, try `rustc --explain E0046`.

4
tests/ui/const-generics/generic_const_exprs/unevaluated-const-ice-119731.rs
View File

@ -25,8 +25,8 @@ pub const fn v21() -> v18 {}
}
impl<const v10: usize> v17<v10, v2> {
//~^ ERROR maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#1}
//~| ERROR maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#1}
//~^ ERROR maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#0}
//~| ERROR maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#0}
pub const fn v21() -> v18 {
//~^ ERROR cannot find type `v18` in this scope
v18 { _p: () }

4
tests/ui/const-generics/generic_const_exprs/unevaluated-const-ice-119731.stderr
View File

@ -72,13 +72,13 @@ help: add `#![feature(adt_const_params)]` to the crate attributes to enable more
LL + #![feature(adt_const_params)]
|
error: maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#1}
error: maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#0}
--> $DIR/unevaluated-const-ice-119731.rs:27:37
|
LL | impl<const v10: usize> v17<v10, v2> {
| ^^
error: maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#1}
error: maximum number of nodes exceeded in constant v20::v17::<v10, v2>::{constant#0}
--> $DIR/unevaluated-const-ice-119731.rs:27:37
|
LL | impl<const v10: usize> v17<v10, v2> {

2
tests/ui/const-generics/transmute-fail.rs
View File

@ -11,8 +11,6 @@
fn bar<const W: bool, const H: usize>(v: [[u32; H]; W]) -> [[u32; W]; H] {
//~^ ERROR: the constant `W` is not of type `usize`
//~| ERROR: mismatched types
//~| ERROR: mismatched types
unsafe {
std::mem::transmute(v)
//~^ ERROR: the constant `W` is not of type `usize`

41
tests/ui/const-generics/transmute-fail.stderr
View File

@ -14,13 +14,13 @@ LL | std::mem::transmute(v)
= note: target type: `[[u32; W + 1]; H]` (size can vary because of [u32; W + 1])
error: the constant `W` is not of type `usize`
--> $DIR/transmute-fail.rs:17:9
--> $DIR/transmute-fail.rs:15:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^ expected `usize`, found `bool`
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:24:9
--> $DIR/transmute-fail.rs:22:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -29,7 +29,7 @@ LL | std::mem::transmute(v)
= note: target type: `[u32; W * H * H]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:31:9
--> $DIR/transmute-fail.rs:29:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -38,7 +38,7 @@ LL | std::mem::transmute(v)
= note: target type: `[[[u32; 9999999]; 777777777]; 8888888]` (values of the type `[[u32; 9999999]; 777777777]` are too big for the current architecture)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:38:9
--> $DIR/transmute-fail.rs:36:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -47,7 +47,7 @@ LL | std::mem::transmute(v)
= note: target type: `[[u32; W]; H]` (size can vary because of [u32; W])
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:49:9
--> $DIR/transmute-fail.rs:47:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -56,7 +56,7 @@ LL | std::mem::transmute(v)
= note: target type: `[u32; W * H]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:56:9
--> $DIR/transmute-fail.rs:54:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -65,7 +65,7 @@ LL | std::mem::transmute(v)
= note: target type: `[[u32; W]; H]` (size can vary because of [u32; W])
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:65:9
--> $DIR/transmute-fail.rs:63:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -74,7 +74,7 @@ LL | std::mem::transmute(v)
= note: target type: `[u32; D * W * H]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:74:9
--> $DIR/transmute-fail.rs:72:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -83,7 +83,7 @@ LL | std::mem::transmute(v)
= note: target type: `[[u32; D * W]; H]` (size can vary because of [u32; D * W])
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:81:9
--> $DIR/transmute-fail.rs:79:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -92,7 +92,7 @@ LL | std::mem::transmute(v)
= note: target type: `[u8; L * 2]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:88:9
--> $DIR/transmute-fail.rs:86:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -101,7 +101,7 @@ LL | std::mem::transmute(v)
= note: target type: `[u16; L]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:95:9
--> $DIR/transmute-fail.rs:93:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -110,7 +110,7 @@ LL | std::mem::transmute(v)
= note: target type: `[[u8; 1]; L]` (this type does not have a fixed size)
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/transmute-fail.rs:104:9
--> $DIR/transmute-fail.rs:102:9
|
LL | std::mem::transmute(v)
| ^^^^^^^^^^^^^^^^^^^
@ -118,19 +118,6 @@ LL | std::mem::transmute(v)
= note: source type: `[[u32; 2 * H]; W + W]` (size can vary because of [u32; 2 * H])
= note: target type: `[[u32; W + W]; 2 * H]` (size can vary because of [u32; W + W])
error[E0308]: mismatched types
--> $DIR/transmute-fail.rs:12:53
|
LL | fn bar<const W: bool, const H: usize>(v: [[u32; H]; W]) -> [[u32; W]; H] {
| ^ expected `usize`, found `bool`
error: aborting due to 14 previous errors
error[E0308]: mismatched types
--> $DIR/transmute-fail.rs:12:67
|
LL | fn bar<const W: bool, const H: usize>(v: [[u32; H]; W]) -> [[u32; W]; H] {
| ^ expected `usize`, found `bool`
error: aborting due to 16 previous errors
Some errors have detailed explanations: E0308, E0512.
For more information about an error, try `rustc --explain E0308`.
For more information about this error, try `rustc --explain E0512`.

2
tests/ui/const-generics/type_mismatch.rs
View File

@ -1,12 +1,10 @@
fn foo<const N: usize>() -> [u8; N] {
bar::<N>()
//~^ ERROR the constant `N` is not of type `u8`
//~| ERROR: mismatched types
}
fn bar<const N: u8>() -> [u8; N] {}
//~^ ERROR the constant `N` is not of type `usize`
//~| ERROR: mismatched types
//~| ERROR mismatched types
fn main() {}

20
tests/ui/const-generics/type_mismatch.stderr
View File

@ -1,5 +1,5 @@
error: the constant `N` is not of type `usize`
--> $DIR/type_mismatch.rs:7:26
--> $DIR/type_mismatch.rs:6:26
|
LL | fn bar<const N: u8>() -> [u8; N] {}
| ^^^^^^^ expected `usize`, found `u8`
@ -11,31 +11,19 @@ LL | bar::<N>()
| ^ expected `u8`, found `usize`
|
note: required by a const generic parameter in `bar`
--> $DIR/type_mismatch.rs:7:8
--> $DIR/type_mismatch.rs:6:8
|
LL | fn bar<const N: u8>() -> [u8; N] {}
| ^^^^^^^^^^^ required by this const generic parameter in `bar`
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:7:26
--> $DIR/type_mismatch.rs:6:26
|
LL | fn bar<const N: u8>() -> [u8; N] {}
| --- ^^^^^^^ expected `[u8; N]`, found `()`
| |
| implicitly returns `()` as its body has no tail or `return` expression
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:2:11
|
LL | bar::<N>()
| ^ expected `u8`, found `usize`
error[E0308]: mismatched types
--> $DIR/type_mismatch.rs:7:31
|
LL | fn bar<const N: u8>() -> [u8; N] {}
| ^ expected `usize`, found `u8`
error: aborting due to 5 previous errors
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0308`.

6
tests/ui/consts/issue-36163.stderr
View File

@ -1,10 +1,10 @@
error[E0391]: cycle detected when simplifying constant for the type system `Foo::B::{constant#0}`
error[E0391]: cycle detected when simplifying constant for the type system `Foo::{constant#0}`
--> $DIR/issue-36163.rs:4:9
|
LL | B = A,
| ^
|
note: ...which requires const-evaluating + checking `Foo::B::{constant#0}`...
note: ...which requires const-evaluating + checking `Foo::{constant#0}`...
--> $DIR/issue-36163.rs:4:9
|
LL | B = A,
@ -19,7 +19,7 @@ note: ...which requires const-evaluating + checking `A`...
|
LL | const A: isize = Foo::B as isize;
| ^^^^^^^^^^^^^^^
= note: ...which again requires simplifying constant for the type system `Foo::B::{constant#0}`, completing the cycle
= note: ...which again requires simplifying constant for the type system `Foo::{constant#0}`, completing the cycle
note: cycle used when checking that `Foo` is well-formed
--> $DIR/issue-36163.rs:3:1
|

5
tests/ui/feature-gates/feature-gate-const-arg-path.rs
View File

@ -1,5 +0,0 @@
//@ check-pass
// this doesn't really have any user facing impact....
fn main() {}

1
tests/ui/lifetimes/issue-95023.rs
View File

@ -9,6 +9,5 @@ impl Fn(&isize) for Error {
//~^ ERROR associated function in `impl` without body
//~| ERROR method `foo` is not a member of trait `Fn` [E0407]
//~| ERROR associated type `B` not found for `Self` [E0220]
//~| ERROR: associated type `B` not found for `Self`
}
fn main() {}

10
tests/ui/lifetimes/issue-95023.stderr
View File

@ -56,15 +56,7 @@ error[E0220]: associated type `B` not found for `Self`
LL | fn foo<const N: usize>(&self) -> Self::B<{ N }>;
| ^ help: `Self` has the following associated type: `Output`
error[E0220]: associated type `B` not found for `Self`
--> $DIR/issue-95023.rs:8:44
|
LL | fn foo<const N: usize>(&self) -> Self::B<{ N }>;
| ^ help: `Self` has the following associated type: `Output`
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 8 previous errors
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0046, E0183, E0220, E0229, E0277, E0407.
For more information about an error, try `rustc --explain E0046`.

1
tests/ui/specialization/default-proj-ty-as-type-of-const-issue-125757.rs
View File

@ -14,6 +14,5 @@ struct Wrapper<const C: <i32 as Trait>::Type> {}
impl<const C: usize> Wrapper<C> {}
//~^ ERROR the constant `C` is not of type `<i32 as Trait>::Type`
//~| ERROR: mismatched types
fn main() {}

14
tests/ui/specialization/default-proj-ty-as-type-of-const-issue-125757.stderr
View File

@ -20,17 +20,5 @@ note: required by a const generic parameter in `Wrapper`
LL | struct Wrapper<const C: <i32 as Trait>::Type> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this const generic parameter in `Wrapper`
error[E0308]: mismatched types
--> $DIR/default-proj-ty-as-type-of-const-issue-125757.rs:15:30
|
LL | impl<const C: usize> Wrapper<C> {}
| ^ expected associated type, found `usize`
|
= note: expected associated type `<i32 as Trait>::Type`
found type `usize`
= help: consider constraining the associated type `<i32 as Trait>::Type` to `usize`
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
error: aborting due to 2 previous errors
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0308`.

1
tests/ui/specialization/min_specialization/bad-const-wf-doesnt-specialize.rs
View File

@ -6,7 +6,6 @@
struct S<const L: usize>;
impl<const N: i32> Copy for S<N> {}
//~^ ERROR: mismatched types
impl<const M: usize> Copy for S<M> {}
//~^ ERROR: conflicting implementations of trait `Copy` for type `S<_>`

14
tests/ui/specialization/min_specialization/bad-const-wf-doesnt-specialize.stderr
View File

@ -1,19 +1,11 @@
error[E0119]: conflicting implementations of trait `Copy` for type `S<_>`
--> $DIR/bad-const-wf-doesnt-specialize.rs:10:1
--> $DIR/bad-const-wf-doesnt-specialize.rs:9:1
|
LL | impl<const N: i32> Copy for S<N> {}
| -------------------------------- first implementation here
LL |
LL | impl<const M: usize> Copy for S<M> {}
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `S<_>`
error[E0308]: mismatched types
--> $DIR/bad-const-wf-doesnt-specialize.rs:8:31
|
LL | impl<const N: i32> Copy for S<N> {}
| ^ expected `usize`, found `i32`
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0119, E0308.
For more information about an error, try `rustc --explain E0119`.
For more information about this error, try `rustc --explain E0119`.

1
tests/ui/transmutability/issue-101739-1.rs
View File

@ -7,7 +7,6 @@ pub fn is_transmutable<Src, const ASSUME_ALIGNMENT: bool>()
where
Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>, //~ ERROR cannot find type `Dst` in this scope
//~| the constant `ASSUME_ALIGNMENT` is not of type `Assume`
//~| ERROR: mismatched types
{
}
}

11
tests/ui/transmutability/issue-101739-1.stderr
View File

@ -13,13 +13,6 @@ LL | Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>,
note: required by a const generic parameter in `TransmuteFrom`
--> $SRC_DIR/core/src/mem/transmutability.rs:LL:COL
error[E0308]: mismatched types
--> $DIR/issue-101739-1.rs:8:33
|
LL | Dst: TransmuteFrom<Src, ASSUME_ALIGNMENT>,
| ^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
error: aborting due to 2 previous errors
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0308, E0412.
For more information about an error, try `rustc --explain E0308`.
For more information about this error, try `rustc --explain E0412`.

2
tests/ui/transmutability/issue-101739-2.rs
View File

@ -17,7 +17,7 @@ pub fn is_transmutable<
Dst: TransmuteFrom<
//~^ ERROR trait takes at most 2 generic arguments but 5 generic arguments were supplied
Src,
ASSUME_ALIGNMENT, //~ ERROR: mismatched types
ASSUME_ALIGNMENT,
ASSUME_LIFETIMES,
ASSUME_VALIDITY,
ASSUME_VISIBILITY,

11
tests/ui/transmutability/issue-101739-2.stderr
View File

@ -11,13 +11,6 @@ LL | | ASSUME_VALIDITY,
LL | | ASSUME_VISIBILITY,
| |_________________________________- help: remove the unnecessary generic arguments
error[E0308]: mismatched types
--> $DIR/issue-101739-2.rs:20:17
|
LL | ASSUME_ALIGNMENT,
| ^^^^^^^^^^^^^^^^ expected `Assume`, found `bool`
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0107, E0308.
For more information about an error, try `rustc --explain E0107`.
For more information about this error, try `rustc --explain E0107`.

1
tests/ui/typeck/issue-114918/const-in-impl-fn-return-type.rs
View File

@ -6,7 +6,6 @@
trait Trait {
fn func<const N: u32>() -> [(); N];
//~^ ERROR: the constant `N` is not of type `usize`
//~| ERROR: mismatched types
}
struct S {}

10
tests/ui/typeck/issue-114918/const-in-impl-fn-return-type.stderr
View File

@ -1,5 +1,5 @@
error[E0308]: mismatched types
--> $DIR/const-in-impl-fn-return-type.rs:16:39
--> $DIR/const-in-impl-fn-return-type.rs:15:39
|
LL | fn func<const N: u32>() -> [(); { () }] {
| ^^ expected `usize`, found `()`
@ -10,12 +10,6 @@ error: the constant `N` is not of type `usize`
LL | fn func<const N: u32>() -> [(); N];
| ^^^^^^^ expected `usize`, found `u32`
error[E0308]: mismatched types
--> $DIR/const-in-impl-fn-return-type.rs:7:37
|
LL | fn func<const N: u32>() -> [(); N];
| ^ expected `usize`, found `u32`
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0308`.