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Add a builtin FnPtr trait

This commit is contained in:
lcnr 2022-07-20 14:32:58 +02:00 committed by Oli Scherer
parent 7a0600714a
commit 0c13565ca6
20 changed files with 310 additions and 27 deletions

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@ -153,6 +153,12 @@ pub(super) trait GoalKind<'tcx>: TypeFoldable<TyCtxt<'tcx>> + Copy + Eq {
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
// A type is a `FnPtr` if it is of `FnPtr` type.
fn consider_builtin_fn_ptr_trait_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
// A callable type (a closure, fn def, or fn ptr) is known to implement the `Fn<A>`
// family of traits where `A` is given by the signature of the type.
fn consider_builtin_fn_trait_candidates(
@ -331,6 +337,8 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
G::consider_builtin_copy_clone_candidate(self, goal)
} else if lang_items.pointer_like() == Some(trait_def_id) {
G::consider_builtin_pointer_like_candidate(self, goal)
} else if lang_items.fn_ptr_trait() == Some(trait_def_id) {
G::consider_builtin_fn_ptr_trait_candidate(self, goal)
} else if let Some(kind) = self.tcx().fn_trait_kind_from_def_id(trait_def_id) {
G::consider_builtin_fn_trait_candidates(self, goal, kind)
} else if lang_items.tuple_trait() == Some(trait_def_id) {