bjoernager/rust
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move impl documentation to their actual locations

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This commit is contained in:
Deadbeef 2024-03-14 20:18:04 +08:00
parent 4b76fac302
commit 69d781abef
3 changed files with 12 additions and 34 deletions
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35
compiler/rustc_trait_selection/src/solve/trait_goals.rs
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@ -188,16 +188,6 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
})
}
/// ```rust,ignore (not valid rust syntax)
/// impl Sized for u*, i*, bool, f*, FnPtr, FnDef, *(const/mut) T, char, &mut? T, [T; N], dyn* Trait, !
///
/// impl Sized for (T1, T2, .., Tn) where T1: Sized, T2: Sized, .. Tn: Sized
///
/// impl Sized for Adt where T: Sized forall T in field types
/// ```
///
/// note that `[T; N]` is unconditionally sized since `T: Sized` is required for the array type to be
/// well-formed.
fn consider_builtin_sized_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
@ -212,20 +202,6 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
)
}
/// ```rust,ignore (not valid rust syntax)
/// impl Copy/Clone for FnDef, FnPtr
///
/// impl Copy/Clone for (T1, T2, .., Tn) where T1: Copy/Clone, T2: Copy/Clone, .. Tn: Copy/Clone
///
/// impl Copy/Clone for Closure where T: Copy/Clone forall T in upvars
///
/// // only when `coroutine_clone` is enabled and the coroutine is movable
/// impl Copy/Clone for Coroutine where T: Copy/Clone forall T in (upvars, witnesses)
///
/// impl Copy/Clone for CoroutineWitness where T: Copy/Clone forall T in coroutine_hidden_types
/// ```
///
/// Some built-in types don't have built-in impls because they can be implemented within the standard library.
fn consider_builtin_copy_clone_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
@ -240,9 +216,6 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
)
}
/// Implements `PointerLike` for types that are pointer-sized, pointer-aligned,
/// and have a initialized (non-union), scalar ABI.
// Please also update compiler/rustc_target/src/abi/mod.rs if the criteria changes
fn consider_builtin_pointer_like_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
@ -272,18 +245,13 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
}
}
/// ```rust,ignore (not valid rust syntax)
/// impl FnPtr for FnPtr {}
/// impl !FnPtr for T where T != FnPtr && T is rigid {}
/// ```
///
/// Note: see [`Ty::is_known_rigid`] for what it means for the type to be rigid.
fn consider_builtin_fn_ptr_trait_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx> {
let self_ty = goal.predicate.self_ty();
match goal.predicate.polarity {
// impl FnPtr for FnPtr {}
ty::ImplPolarity::Positive => {
if self_ty.is_fn_ptr() {
ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
@ -291,6 +259,7 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
Err(NoSolution)
}
}
// impl !FnPtr for T where T != FnPtr && T is rigid {}
ty::ImplPolarity::Negative => {
// If a type is rigid and not a fn ptr, then we know for certain
// that it does *not* implement `FnPtr`.