forked from rust-lang/rust
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Rollup merge of rust-lang#115532 - oli-obk:smir_folder, r=compiler-er…
…rors Implement SMIR generic parameter instantiation Also demonstrates the use of it with a test. This required a few smaller changes that may conflict with `@ericmarkmartin` work, but should be easy to resolve any conflicts on my end if their stuff lands first.
- Loading branch information
Showing
7 changed files
with
434 additions
and
40 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,230 @@ | ||
| use std::ops::ControlFlow; | ||
|
|
||
| use crate::rustc_internal::Opaque; | ||
|
|
||
| use super::ty::{ | ||
| Allocation, Binder, Const, ConstDef, ConstantKind, ExistentialPredicate, FnSig, GenericArgKind, | ||
| GenericArgs, Promoted, RigidTy, TermKind, Ty, TyKind, UnevaluatedConst, | ||
| }; | ||
|
|
||
| pub trait Folder: Sized { | ||
| type Break; | ||
| fn visit_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> { | ||
| ty.super_fold(self) | ||
| } | ||
| fn fold_const(&mut self, c: &Const) -> ControlFlow<Self::Break, Const> { | ||
| c.super_fold(self) | ||
| } | ||
| } | ||
|
|
||
| pub trait Foldable: Sized + Clone { | ||
| fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| self.super_fold(folder) | ||
| } | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self>; | ||
| } | ||
|
|
||
| impl Foldable for Ty { | ||
| fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| folder.visit_ty(self) | ||
| } | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut kind = self.kind(); | ||
| match &mut kind { | ||
| super::ty::TyKind::RigidTy(ty) => *ty = ty.fold(folder)?, | ||
| super::ty::TyKind::Alias(_, alias) => alias.args = alias.args.fold(folder)?, | ||
| super::ty::TyKind::Param(_) => {} | ||
| super::ty::TyKind::Bound(_, _) => {} | ||
| } | ||
| ControlFlow::Continue(kind.into()) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for Const { | ||
| fn fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| folder.fold_const(self) | ||
| } | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut this = self.clone(); | ||
| match &mut this.literal { | ||
| super::ty::ConstantKind::Allocated(alloc) => *alloc = alloc.fold(folder)?, | ||
| super::ty::ConstantKind::Unevaluated(uv) => *uv = uv.fold(folder)?, | ||
| super::ty::ConstantKind::Param(_) => {} | ||
| } | ||
| this.ty = this.ty.fold(folder)?; | ||
| ControlFlow::Continue(this) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for Opaque { | ||
| fn super_fold<V: Folder>(&self, _folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(self.clone()) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for Allocation { | ||
| fn super_fold<V: Folder>(&self, _folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(self.clone()) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for UnevaluatedConst { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let UnevaluatedConst { def, args, promoted } = self; | ||
| ControlFlow::Continue(UnevaluatedConst { | ||
| def: def.fold(folder)?, | ||
| args: args.fold(folder)?, | ||
| promoted: promoted.fold(folder)?, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for ConstDef { | ||
| fn super_fold<V: Folder>(&self, _folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(self.clone()) | ||
| } | ||
| } | ||
|
|
||
| impl<T: Foldable> Foldable for Option<T> { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(match self { | ||
| Some(val) => Some(val.fold(folder)?), | ||
| None => None, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for Promoted { | ||
| fn super_fold<V: Folder>(&self, _folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(self.clone()) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for GenericArgs { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(GenericArgs(self.0.fold(folder)?)) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for GenericArgKind { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut this = self.clone(); | ||
| match &mut this { | ||
| GenericArgKind::Lifetime(lt) => *lt = lt.fold(folder)?, | ||
| GenericArgKind::Type(t) => *t = t.fold(folder)?, | ||
| GenericArgKind::Const(c) => *c = c.fold(folder)?, | ||
| } | ||
| ControlFlow::Continue(this) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for RigidTy { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut this = self.clone(); | ||
| match &mut this { | ||
| RigidTy::Bool | ||
| | RigidTy::Char | ||
| | RigidTy::Int(_) | ||
| | RigidTy::Uint(_) | ||
| | RigidTy::Float(_) | ||
| | RigidTy::Never | ||
| | RigidTy::Foreign(_) | ||
| | RigidTy::Str => {} | ||
| RigidTy::Array(t, c) => { | ||
| *t = t.fold(folder)?; | ||
| *c = c.fold(folder)?; | ||
| } | ||
| RigidTy::Slice(inner) => *inner = inner.fold(folder)?, | ||
| RigidTy::RawPtr(ty, _) => *ty = ty.fold(folder)?, | ||
| RigidTy::Ref(_, ty, _) => *ty = ty.fold(folder)?, | ||
| RigidTy::FnDef(_, args) => *args = args.fold(folder)?, | ||
| RigidTy::FnPtr(sig) => *sig = sig.fold(folder)?, | ||
| RigidTy::Closure(_, args) => *args = args.fold(folder)?, | ||
| RigidTy::Generator(_, args, _) => *args = args.fold(folder)?, | ||
| RigidTy::Dynamic(pred, r, _) => { | ||
| *pred = pred.fold(folder)?; | ||
| *r = r.fold(folder)?; | ||
| } | ||
| RigidTy::Tuple(fields) => *fields = fields.fold(folder)?, | ||
| RigidTy::Adt(_, args) => *args = args.fold(folder)?, | ||
| } | ||
| ControlFlow::Continue(this) | ||
| } | ||
| } | ||
|
|
||
| impl<T: Foldable> Foldable for Vec<T> { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut this = self.clone(); | ||
| for arg in &mut this { | ||
| *arg = arg.fold(folder)?; | ||
| } | ||
| ControlFlow::Continue(this) | ||
| } | ||
| } | ||
|
|
||
| impl<T: Foldable> Foldable for Binder<T> { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(Self { | ||
| value: self.value.fold(folder)?, | ||
| bound_vars: self.bound_vars.clone(), | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for ExistentialPredicate { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| let mut this = self.clone(); | ||
| match &mut this { | ||
| ExistentialPredicate::Trait(tr) => tr.generic_args = tr.generic_args.fold(folder)?, | ||
| ExistentialPredicate::Projection(p) => { | ||
| p.term = p.term.fold(folder)?; | ||
| p.generic_args = p.generic_args.fold(folder)?; | ||
| } | ||
| ExistentialPredicate::AutoTrait(_) => {} | ||
| } | ||
| ControlFlow::Continue(this) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for TermKind { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(match self { | ||
| TermKind::Type(t) => TermKind::Type(t.fold(folder)?), | ||
| TermKind::Const(c) => TermKind::Const(c.fold(folder)?), | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| impl Foldable for FnSig { | ||
| fn super_fold<V: Folder>(&self, folder: &mut V) -> ControlFlow<V::Break, Self> { | ||
| ControlFlow::Continue(Self { | ||
| inputs_and_output: self.inputs_and_output.fold(folder)?, | ||
| c_variadic: self.c_variadic, | ||
| unsafety: self.unsafety, | ||
| abi: self.abi.clone(), | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| pub enum Never {} | ||
|
|
||
| /// In order to instantiate a `Foldable`'s generic parameters with specific arguments, | ||
| /// `GenericArgs` can be used as a `Folder` that replaces all mentions of generic params | ||
| /// with the entries in its list. | ||
| impl Folder for GenericArgs { | ||
| type Break = Never; | ||
|
|
||
| fn visit_ty(&mut self, ty: &Ty) -> ControlFlow<Self::Break, Ty> { | ||
| ControlFlow::Continue(match ty.kind() { | ||
| TyKind::Param(p) => self[p], | ||
| _ => *ty, | ||
| }) | ||
| } | ||
|
|
||
| fn fold_const(&mut self, c: &Const) -> ControlFlow<Self::Break, Const> { | ||
| ControlFlow::Continue(match &c.literal { | ||
| ConstantKind::Param(p) => self[p.clone()].clone(), | ||
| _ => c.clone(), | ||
| }) | ||
| } | ||
| } |
Oops, something went wrong.