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Auto merge of #118282 - fee1-dead-contrib:enforce-more, r=compiler-errors

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effects: Run `enforce_context_effects` for all method calls

So that we also perform checks when overloaded `PartialEq`s are called.

r? `@compiler-errors`
This commit is contained in:
bors 2023-11-28 08:23:47 +00:00
commit e06c94d6cb
11 changed files with 105 additions and 48 deletions
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8
compiler/rustc_hir_typeck/src/callee.rs
View File

@ -845,7 +845,7 @@ fn confirm_overloaded_call(
expected,
);
self.write_method_call(call_expr.hir_id, method_callee);
self.write_method_call_and_enforce_effects(call_expr.hir_id, call_expr.span, method_callee);
output_type
}
}
@ -895,7 +895,11 @@ pub fn resolve(self, fcx: &FnCtxt<'a, 'tcx>) {
adjustments.extend(autoref);
fcx.apply_adjustments(self.callee_expr, adjustments);
fcx.write_method_call(self.call_expr.hir_id, method_callee);
fcx.write_method_call_and_enforce_effects(
self.call_expr.hir_id,
self.call_expr.span,
method_callee,
);
}
None => {
// This can happen if `#![no_core]` is used and the `fn/fn_mut/fn_once`

4
compiler/rustc_hir_typeck/src/expr.rs
View File

@ -1315,9 +1315,7 @@ fn check_method_call(
Ok(method) => {
// We could add a "consider `foo::<params>`" suggestion here, but I wasn't able to
// trigger this codepath causing `structurally_resolve_type` to emit an error.
self.enforce_context_effects(expr.hir_id, expr.span, method.def_id, method.args);
self.write_method_call(expr.hir_id, method);
self.write_method_call_and_enforce_effects(expr.hir_id, expr.span, method);
Ok(method)
}
Err(error) => {

8
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -159,7 +159,13 @@ pub(in super::super) fn write_resolution(
}
#[instrument(level = "debug", skip(self))]
pub fn write_method_call(&self, hir_id: hir::HirId, method: MethodCallee<'tcx>) {
pub fn write_method_call_and_enforce_effects(
&self,
hir_id: hir::HirId,
span: Span,
method: MethodCallee<'tcx>,
) {
self.enforce_context_effects(hir_id, span, method.def_id, method.args);
self.write_resolution(hir_id, Ok((DefKind::AssocFn, method.def_id)));
self.write_args(hir_id, method.args);
}

6
compiler/rustc_hir_typeck/src/lib.rs
View File

@ -438,9 +438,13 @@ fn fatally_break_rust(tcx: TyCtxt<'_>) {
}
}
/// `expected` here is the expected number of explicit generic arguments on the trait.
fn has_expected_num_generic_args(tcx: TyCtxt<'_>, trait_did: DefId, expected: usize) -> bool {
let generics = tcx.generics_of(trait_did);
generics.count() == expected + if generics.has_self { 1 } else { 0 }
generics.count()
== expected
+ if generics.has_self { 1 } else { 0 }
+ if generics.host_effect_index.is_some() { 1 } else { 0 }
}
pub fn provide(providers: &mut Providers) {

4
compiler/rustc_hir_typeck/src/op.rs
View File

@ -291,7 +291,7 @@ fn check_overloaded_binop(
.push(autoref);
}
}
self.write_method_call(expr.hir_id, method);
self.write_method_call_and_enforce_effects(expr.hir_id, expr.span, method);
method.sig.output()
}
@ -781,7 +781,7 @@ pub fn check_user_unop(
assert!(op.is_by_value());
match self.lookup_op_method(operand_ty, None, Op::Unary(op, ex.span), expected) {
Ok(method) => {
self.write_method_call(ex.hir_id, method);
self.write_method_call_and_enforce_effects(ex.hir_id, ex.span, method);
method.sig.output()
}
Err(errors) => {

6
compiler/rustc_hir_typeck/src/place_op.rs
View File

@ -38,7 +38,7 @@ pub(super) fn lookup_derefing(
span_bug!(expr.span, "input to deref is not a ref?");
}
let ty = self.make_overloaded_place_return_type(method).ty;
self.write_method_call(expr.hir_id, method);
self.write_method_call_and_enforce_effects(expr.hir_id, expr.span, method);
Some(ty)
}
@ -179,7 +179,7 @@ fn try_index_step(
}
self.apply_adjustments(base_expr, adjustments);
self.write_method_call(expr.hir_id, method);
self.write_method_call_and_enforce_effects(expr.hir_id, expr.span, method);
return Some((input_ty, self.make_overloaded_place_return_type(method).ty));
}
@ -404,7 +404,7 @@ fn convert_place_op_to_mutable(
None => return,
};
debug!("convert_place_op_to_mutable: method={:?}", method);
self.write_method_call(expr.hir_id, method);
self.write_method_call_and_enforce_effects(expr.hir_id, expr.span, method);
let ty::Ref(region, _, hir::Mutability::Mut) = method.sig.inputs()[0].kind() else {
span_bug!(expr.span, "input to mutable place op is not a mut ref?");

8
compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
View File

@ -263,13 +263,13 @@ fn type_has_partial_eq_impl(&self, ty: Ty<'tcx>) -> bool {
// (If there isn't, then we can safely issue a hard
// error, because that's never worked, due to compiler
// using `PartialEq::eq` in this scenario in the past.)
let partial_eq_trait_id =
self.tcx().require_lang_item(hir::LangItem::PartialEq, Some(self.span));
let tcx = self.tcx();
let partial_eq_trait_id = tcx.require_lang_item(hir::LangItem::PartialEq, Some(self.span));
let partial_eq_obligation = Obligation::new(
self.tcx(),
tcx,
ObligationCause::dummy(),
self.param_env,
ty::TraitRef::new(self.tcx(), partial_eq_trait_id, [ty, ty]),
ty::TraitRef::new(tcx, partial_eq_trait_id, [ty, ty]),
);
// This *could* accept a type that isn't actually `PartialEq`, because region bounds get

8
tests/ui/rfcs/rfc-2632-const-trait-impl/call-generic-method-nonconst.rs
View File

@ -1,7 +1,4 @@
// check-pass
// known-bug: #110395
#![feature(const_trait_impl)]
#![feature(const_trait_impl, effects)]
struct S;
@ -24,6 +21,7 @@ const fn equals_self<T: ~const Foo>(t: &T) -> bool {
// it not using the impl.
pub const EQ: bool = equals_self(&S);
// FIXME(effects) ~^ ERROR
//~^ ERROR
// FIXME(effects) the diagnostics here isn't ideal, we shouldn't get `<false>`
fn main() {}

18
tests/ui/rfcs/rfc-2632-const-trait-impl/call-generic-method-nonconst.stderr Normal file
View File

@ -0,0 +1,18 @@
error[E0277]: the trait bound `S: ~const Foo<false>` is not satisfied
--> $DIR/call-generic-method-nonconst.rs:23:34
|
LL | pub const EQ: bool = equals_self(&S);
| ----------- ^^ the trait `Foo<false>` is not implemented for `S`
| |
| required by a bound introduced by this call
|
= help: the trait `Foo` is implemented for `S`
note: required by a bound in `equals_self`
--> $DIR/call-generic-method-nonconst.rs:16:25
|
LL | const fn equals_self<T: ~const Foo>(t: &T) -> bool {
| ^^^^^^^^^^ required by this bound in `equals_self`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.

4
tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.rs
View File

@ -21,7 +21,7 @@ trait Add<Rhs = Self> {
fn add(self, rhs: Rhs) -> Self::Output;
}
// FIXME we shouldn't need to have to specify `Rhs`.
// FIXME(effects) we shouldn't need to have to specify `Rhs`.
impl const Add<i32> for i32 {
type Output = i32;
fn add(self, rhs: i32) -> i32 {
@ -336,7 +336,7 @@ fn from_str(s: &str) -> Result<bool, ()> {
}
#[lang = "eq"]
#[const_trait]
// FIXME #[const_trait]
trait PartialEq<Rhs: ?Sized = Self> {
fn eq(&self, other: &Rhs) -> bool;
fn ne(&self, other: &Rhs) -> bool {

79
tests/ui/rfcs/rfc-2632-const-trait-impl/effects/minicore.stderr
View File

@ -1,32 +1,61 @@
error[E0369]: cannot add `i32` to `i32`
--> $DIR/minicore.rs:33:20
warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
--> $DIR/minicore.rs:332:9
|
LL | let x = 42_i32 + 43_i32;
| ------ ^ ------ i32
| |
| i32
error[E0369]: cannot add `i32` to `i32`
--> $DIR/minicore.rs:37:20
LL | "true" => Ok(true),
| ^^^^^^
|
LL | let x = 42_i32 + 43_i32;
| ------ ^ ------ i32
| |
| i32
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
= note: `#[warn(const_patterns_without_partial_eq)]` on by default
error[E0600]: cannot apply unary operator `!` to type `bool`
--> $DIR/minicore.rs:343:9
warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
--> $DIR/minicore.rs:333:9
|
LL | !self.eq(other)
| ^^^^^^^^^^^^^^^ cannot apply unary operator `!`
error[E0600]: cannot apply unary operator `!` to type `bool`
--> $DIR/minicore.rs:365:9
LL | "false" => Ok(false),
| ^^^^^^^
|
LL | !self
| ^^^^^ cannot apply unary operator `!`
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
error: aborting due to 4 previous errors
error[E0493]: destructor of `Self` cannot be evaluated at compile-time
--> $DIR/minicore.rs:494:9
|
LL | *self = source.clone()
| ^^^^^
| |
| the destructor for this type cannot be evaluated in constant functions
| value is dropped here
error[E0493]: destructor of `T` cannot be evaluated at compile-time
--> $DIR/minicore.rs:504:35
|
LL | const fn drop<T: ~const Destruct>(_: T) {}
| ^ - value is dropped here
| |
| the destructor for this type cannot be evaluated in constant functions
error: aborting due to 2 previous errors; 2 warnings emitted
For more information about this error, try `rustc --explain E0493`.
Future incompatibility report: Future breakage diagnostic:
warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
--> $DIR/minicore.rs:332:9
|
LL | "true" => Ok(true),
| ^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
= note: `#[warn(const_patterns_without_partial_eq)]` on by default
Future breakage diagnostic:
warning: to use a constant of type `&str` in a pattern, the type must implement `PartialEq`
--> $DIR/minicore.rs:333:9
|
LL | "false" => Ok(false),
| ^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #116122 <https://github.com/rust-lang/rust/issues/116122>
= note: `#[warn(const_patterns_without_partial_eq)]` on by default
Some errors have detailed explanations: E0369, E0600.
For more information about an error, try `rustc --explain E0369`.