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author | lcnr <rust@lcnr.de> | 2022-07-20 14:32:58 +0200 |
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committer | Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de> | 2023-03-27 12:16:54 +0000 |
commit | 0c13565ca66d25d15ee9146919dd74e57cdfda89 (patch) | |
tree | b0a7561ac7421c0df2e6daa3a047cf3dfb107627 /compiler/rustc_ty_utils | |
parent | 7a0600714ab1a4cb2d1a88cd0660b9f9a2c07309 (diff) | |
download | rust-0c13565ca66d25d15ee9146919dd74e57cdfda89.tar.gz |
Add a builtin `FnPtr` trait
Diffstat (limited to 'compiler/rustc_ty_utils')
-rw-r--r-- | compiler/rustc_ty_utils/src/instance.rs | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/compiler/rustc_ty_utils/src/instance.rs b/compiler/rustc_ty_utils/src/instance.rs index 2eaeca73da7..ad70154c98e 100644 --- a/compiler/rustc_ty_utils/src/instance.rs +++ b/compiler/rustc_ty_utils/src/instance.rs @@ -243,7 +243,8 @@ fn resolve_associated_item<'tcx>( } } traits::ImplSource::Builtin(..) => { - if Some(trait_ref.def_id) == tcx.lang_items().clone_trait() { + let lang_items = tcx.lang_items(); + if Some(trait_ref.def_id) == lang_items.clone_trait() { // FIXME(eddyb) use lang items for methods instead of names. let name = tcx.item_name(trait_item_id); if name == sym::clone { @@ -270,6 +271,22 @@ fn resolve_associated_item<'tcx>( let substs = tcx.erase_regions(rcvr_substs); Some(ty::Instance::new(trait_item_id, substs)) } + } else if Some(trait_ref.def_id) == lang_items.fn_ptr_trait() { + if lang_items.fn_ptr_addr() == Some(trait_item_id) { + let self_ty = trait_ref.self_ty(); + if !matches!(self_ty.kind(), ty::FnPtr(..)) { + return Ok(None); + } + Some(Instance { + def: ty::InstanceDef::FnPtrAddrShim(trait_item_id, self_ty), + substs: rcvr_substs, + }) + } else { + tcx.sess.span_fatal( + tcx.def_span(trait_item_id), + "`FnPtrAddr` trait with unexpected assoc item", + ) + } } else { None } |