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Gate checking ~const bounds on const_trait_impl

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This commit is contained in:
Michael Goulet 2024-10-30 17:42:31 +00:00
parent 7028d9318f
commit ace9e4c078
13 changed files with 26 additions and 191 deletions
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8
compiler/rustc_const_eval/src/check_consts/check.rs
View File

@ -20,7 +20,6 @@ use rustc_mir_dataflow::Analysis;
use rustc_mir_dataflow::impls::MaybeStorageLive;
use rustc_mir_dataflow::storage::always_storage_live_locals;
use rustc_span::{Span, Symbol, sym};
use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
use rustc_trait_selection::traits::{
Obligation, ObligationCause, ObligationCauseCode, ObligationCtxt,
};
@ -419,13 +418,8 @@ impl<'mir, 'tcx> Checker<'mir, 'tcx> {
let errors = ocx.select_all_or_error();
if !errors.is_empty() {
// FIXME(effects): Soon this should be unconditionally delaying a bug.
if matches!(call_source, CallSource::Normal) && tcx.features().effects() {
tcx.dcx()
.span_delayed_bug(call_span, "this should have reported a ~const error in HIR");
} else {
infcx.err_ctxt().report_fulfillment_errors(errors);
}
}
}
}
@ -664,7 +658,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
// so we only error if the trait isn't const. We try to resolve the trait
// into the concrete method, and uses that for const stability checks.
// FIXME(effects) we might consider moving const stability checks to typeck as well.
if tcx.features().effects() && trait_is_const {
if tcx.features().const_trait_impl() && trait_is_const {
// This skips the check below that ensures we only call `const fn`.
is_trait = true;

2
compiler/rustc_hir_typeck/src/callee.rs
View File

@ -847,7 +847,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// This can be done as soon as we convert the standard library back to
// using const traits, since if we were to enforce these conditions now,
// we'd fail on basically every builtin trait call (i.e. `1 + 2`).
if !self.tcx.features().effects() {
if !self.tcx.features().const_trait_impl() {
return;
}

51
tests/ui/specialization/const_trait_impl.stderr
View File

@ -40,54 +40,5 @@ LL | impl<T: ~const Default + ~const Sub> const A for T {
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0015]: cannot call non-const fn `<() as A>::a` in constants
--> $DIR/const_trait_impl.rs:52:23
|
LL | const _: () = assert!(<()>::a() == 42);
| ^^^^^^^^^
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 6 previous errors
error[E0015]: cannot call non-const fn `<u8 as A>::a` in constants
--> $DIR/const_trait_impl.rs:53:23
|
LL | const _: () = assert!(<u8>::a() == 3);
| ^^^^^^^^^
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error[E0015]: cannot call non-const fn `<u16 as A>::a` in constants
--> $DIR/const_trait_impl.rs:54:23
|
LL | const _: () = assert!(<u16>::a() == 2);
| ^^^^^^^^^^
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error[E0015]: cannot call non-const fn `<T as Sup>::foo` in constant functions
--> $DIR/const_trait_impl.rs:48:9
|
LL | T::foo()
| ^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 10 previous errors
For more information about this error, try `rustc --explain E0015`.

26
tests/ui/traits/const-traits/call-const-trait-method-pass.stderr
View File

@ -24,18 +24,6 @@ LL | const ADD_INT: Int = Int(1i32) + Int(2i32);
|
= note: calls in constants are limited to constant functions, tuple structs and tuple variants
error[E0015]: cannot call non-const fn `<i32 as Plus>::plus` in constant functions
--> $DIR/call-const-trait-method-pass.rs:11:20
|
LL | Int(self.0.plus(rhs.0))
| ^^^^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error[E0015]: cannot call non-const fn `<Int as PartialEq>::eq` in constant functions
--> $DIR/call-const-trait-method-pass.rs:20:15
|
@ -44,18 +32,6 @@ LL | !self.eq(other)
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
error[E0015]: cannot call non-const fn `<i32 as Plus>::plus` in constant functions
--> $DIR/call-const-trait-method-pass.rs:36:7
|
LL | a.plus(b)
| ^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 6 previous errors
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0015`.

30
tests/ui/traits/const-traits/const-drop-fail-2.stderr
View File

@ -21,6 +21,12 @@ LL | const fn check<T: ~const Destruct>(_: T) {}
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0277]: the trait bound `T: ~const A` is not satisfied
--> $DIR/const-drop-fail-2.rs:41:9
|
LL | T::a();
| ^^^^^^
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/const-drop-fail-2.rs:20:36
|
@ -29,25 +35,7 @@ LL | const fn check<T: ~const Destruct>(_: T) {}
| |
| the destructor for this type cannot be evaluated in constant functions
error[E0277]: the trait bound `T: ~const A` is not satisfied
--> $DIR/const-drop-fail-2.rs:41:9
|
LL | T::a();
| ^^^^^^
error: aborting due to 5 previous errors
error[E0015]: cannot call non-const fn `<T as A>::a` in constant functions
--> $DIR/const-drop-fail-2.rs:41:9
|
LL | T::a();
| ^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0015, E0277, E0493.
For more information about an error, try `rustc --explain E0015`.
Some errors have detailed explanations: E0277, E0493.
For more information about an error, try `rustc --explain E0277`.

18
tests/ui/traits/const-traits/const-drop.precise.stderr
View File

@ -84,19 +84,7 @@ error[E0277]: the trait bound `T: ~const SomeTrait` is not satisfied
LL | T::foo();
| ^^^^^^^^
error[E0015]: cannot call non-const fn `<T as SomeTrait>::foo` in constant functions
--> $DIR/const-drop.rs:69:13
|
LL | T::foo();
| ^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 10 previous errors
error: aborting due to 11 previous errors
Some errors have detailed explanations: E0015, E0277, E0493.
For more information about an error, try `rustc --explain E0015`.
Some errors have detailed explanations: E0277, E0493.
For more information about an error, try `rustc --explain E0277`.

18
tests/ui/traits/const-traits/const-drop.stock.stderr
View File

@ -86,19 +86,7 @@ error[E0277]: the trait bound `T: ~const SomeTrait` is not satisfied
LL | T::foo();
| ^^^^^^^^
error[E0015]: cannot call non-const fn `<T as SomeTrait>::foo` in constant functions
--> $DIR/const-drop.rs:69:13
|
LL | T::foo();
| ^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 10 previous errors
error: aborting due to 11 previous errors
Some errors have detailed explanations: E0015, E0277, E0493.
For more information about an error, try `rustc --explain E0015`.
Some errors have detailed explanations: E0277, E0493.
For more information about an error, try `rustc --explain E0277`.

6
tests/ui/traits/const-traits/default-method-body-is-const-body-checking.stderr
View File

@ -3,12 +3,6 @@ error[E0277]: the trait bound `(): ~const Tr` is not satisfied
|
LL | foo::<()>();
| ^^^^^^^^^^^
|
note: required by a bound in `foo`
--> $DIR/default-method-body-is-const-body-checking.rs:7:28
|
LL | const fn foo<T>() where T: ~const Tr {}
| ^^^^^^ required by this bound in `foo`
error: aborting due to 1 previous error

3
tests/ui/traits/const-traits/specialization/const-default-const-specialized.rs
View File

@ -1,8 +1,7 @@
// Tests that a const default trait impl can be specialized by another const
// trait impl and that the specializing impl will be used during const-eval.
//@ known-bug: #110395
// FIXME(effects) run-pass
//@ run-pass
#![feature(const_trait_impl)]
#![feature(min_specialization)]

15
tests/ui/traits/const-traits/specialization/const-default-const-specialized.stderr
View File

@ -1,15 +0,0 @@
error[E0015]: cannot call non-const fn `<T as Value>::value` in constant functions
--> $DIR/const-default-const-specialized.rs:16:5
|
LL | T::value()
| ^^^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0015`.

4
tests/ui/traits/const-traits/specialization/non-const-default-const-specialized.rs
View File

@ -1,7 +1,7 @@
// Tests that a non-const default impl can be specialized by a const trait impl,
// but that the default impl cannot be used in a const context.
//@ known-bug: #110395
// FIXME(effects) run-pass
//@ run-pass
#![feature(const_trait_impl)]
#![feature(min_specialization)]

15
tests/ui/traits/const-traits/specialization/non-const-default-const-specialized.stderr
View File

@ -1,15 +0,0 @@
error[E0015]: cannot call non-const fn `<T as Value>::value` in constant functions
--> $DIR/non-const-default-const-specialized.rs:15:5
|
LL | T::value()
| ^^^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0015`.

17
tests/ui/traits/const-traits/specializing-constness-2.stderr
View File

@ -4,19 +4,6 @@ error[E0277]: the trait bound `T: ~const A` is not satisfied
LL | <T as A>::a();
| ^^^^^^^^^^^^^
error[E0015]: cannot call non-const fn `<T as A>::a` in constant functions
--> $DIR/specializing-constness-2.rs:27:5
|
LL | <T as A>::a();
| ^^^^^^^^^^^^^
|
= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
help: add `#![feature(effects)]` to the crate attributes to enable
|
LL + #![feature(effects)]
|
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0015, E0277.
For more information about an error, try `rustc --explain E0015`.
For more information about this error, try `rustc --explain E0277`.