777 lines
27 KiB
Rust
777 lines
27 KiB
Rust
//! This module contains implementations of the `Lift`, `TypeFoldable` and
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//! `TypeVisitable` traits for various types in the Rust compiler. Most are
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//! written by hand, though we've recently added some macros and proc-macros
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//! to help with the tedium.
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use std::fmt::{self, Debug};
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use rustc_abi::TyAndLayout;
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use rustc_hir::def::Namespace;
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use rustc_hir::def_id::LocalDefId;
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use rustc_span::source_map::Spanned;
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use rustc_type_ir::{ConstKind, TypeFolder, VisitorResult, try_visit};
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use super::print::PrettyPrinter;
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use super::{GenericArg, GenericArgKind, Pattern, Region};
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use crate::infer::canonical::CanonicalVarInfos;
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use crate::mir::PlaceElem;
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use crate::ty::print::{FmtPrinter, Printer, with_no_trimmed_paths};
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use crate::ty::{
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self, FallibleTypeFolder, Lift, Term, TermKind, Ty, TyCtxt, TypeFoldable, TypeSuperFoldable,
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TypeSuperVisitable, TypeVisitable, TypeVisitor,
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};
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impl fmt::Debug for ty::TraitDef {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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ty::tls::with(|tcx| {
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with_no_trimmed_paths!({
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let s = FmtPrinter::print_string(tcx, Namespace::TypeNS, |cx| {
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cx.print_def_path(self.def_id, &[])
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})?;
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f.write_str(&s)
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})
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})
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}
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}
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impl<'tcx> fmt::Debug for ty::AdtDef<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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ty::tls::with(|tcx| {
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with_no_trimmed_paths!({
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let s = FmtPrinter::print_string(tcx, Namespace::TypeNS, |cx| {
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cx.print_def_path(self.did(), &[])
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})?;
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f.write_str(&s)
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})
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})
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}
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}
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impl fmt::Debug for ty::UpvarId {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let name = ty::tls::with(|tcx| tcx.hir_name(self.var_path.hir_id));
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write!(f, "UpvarId({:?};`{}`;{:?})", self.var_path.hir_id, name, self.closure_expr_id)
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}
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}
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impl<'tcx> fmt::Debug for ty::adjustment::Adjustment<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{:?} -> {}", self.kind, self.target)
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}
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}
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impl fmt::Debug for ty::BoundRegionKind {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::BoundRegionKind::Anon => write!(f, "BrAnon"),
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ty::BoundRegionKind::Named(did, name) => {
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if did.is_crate_root() {
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write!(f, "BrNamed({name})")
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} else {
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write!(f, "BrNamed({did:?}, {name})")
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}
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}
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ty::BoundRegionKind::ClosureEnv => write!(f, "BrEnv"),
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}
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}
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}
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impl fmt::Debug for ty::LateParamRegion {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "ReLateParam({:?}, {:?})", self.scope, self.kind)
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}
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}
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impl fmt::Debug for ty::LateParamRegionKind {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::LateParamRegionKind::Anon(idx) => write!(f, "LateAnon({idx})"),
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ty::LateParamRegionKind::Named(did, name) => {
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if did.is_crate_root() {
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write!(f, "LateNamed({name})")
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} else {
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write!(f, "LateNamed({did:?}, {name})")
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}
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}
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ty::LateParamRegionKind::ClosureEnv => write!(f, "LateEnv"),
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}
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}
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}
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impl<'tcx> fmt::Debug for Ty<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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with_no_trimmed_paths!(fmt::Debug::fmt(self.kind(), f))
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}
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}
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impl fmt::Debug for ty::ParamTy {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{}/#{}", self.name, self.index)
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}
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}
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impl fmt::Debug for ty::ParamConst {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{}/#{}", self.name, self.index)
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}
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}
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impl<'tcx> fmt::Debug for ty::Predicate<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{:?}", self.kind())
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}
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}
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impl<'tcx> fmt::Debug for ty::Clause<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{:?}", self.kind())
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}
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}
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impl<'tcx> fmt::Debug for ty::consts::Expr<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self.kind {
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ty::ExprKind::Binop(op) => {
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let (lhs_ty, rhs_ty, lhs, rhs) = self.binop_args();
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write!(f, "({op:?}: ({:?}: {:?}), ({:?}: {:?}))", lhs, lhs_ty, rhs, rhs_ty,)
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}
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ty::ExprKind::UnOp(op) => {
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let (rhs_ty, rhs) = self.unop_args();
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write!(f, "({op:?}: ({:?}: {:?}))", rhs, rhs_ty)
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}
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ty::ExprKind::FunctionCall => {
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let (func_ty, func, args) = self.call_args();
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let args = args.collect::<Vec<_>>();
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write!(f, "({:?}: {:?})(", func, func_ty)?;
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for arg in args.iter().rev().skip(1).rev() {
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write!(f, "{:?}, ", arg)?;
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}
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if let Some(arg) = args.last() {
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write!(f, "{:?}", arg)?;
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}
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write!(f, ")")
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}
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ty::ExprKind::Cast(kind) => {
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let (value_ty, value, to_ty) = self.cast_args();
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write!(f, "({kind:?}: ({:?}: {:?}), {:?})", value, value_ty, to_ty)
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}
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}
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}
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}
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impl<'tcx> fmt::Debug for ty::Const<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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// If this is a value, we spend some effort to make it look nice.
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if let ConstKind::Value(cv) = self.kind() {
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return ty::tls::with(move |tcx| {
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let cv = tcx.lift(cv).unwrap();
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let mut cx = FmtPrinter::new(tcx, Namespace::ValueNS);
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cx.pretty_print_const_valtree(cv, /*print_ty*/ true)?;
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f.write_str(&cx.into_buffer())
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});
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}
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// Fall back to something verbose.
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write!(f, "{:?}", self.kind())
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}
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}
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impl fmt::Debug for ty::BoundTy {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self.kind {
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ty::BoundTyKind::Anon => write!(f, "{:?}", self.var),
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ty::BoundTyKind::Param(_, sym) => write!(f, "{sym:?}"),
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}
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}
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}
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impl<T: fmt::Debug> fmt::Debug for ty::Placeholder<T> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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if self.universe == ty::UniverseIndex::ROOT {
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write!(f, "!{:?}", self.bound)
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} else {
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write!(f, "!{}_{:?}", self.universe.index(), self.bound)
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}
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}
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}
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impl<'tcx> fmt::Debug for GenericArg<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self.unpack() {
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GenericArgKind::Lifetime(lt) => lt.fmt(f),
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GenericArgKind::Type(ty) => ty.fmt(f),
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GenericArgKind::Const(ct) => ct.fmt(f),
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}
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}
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}
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impl<'tcx> fmt::Debug for Region<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "{:?}", self.kind())
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Atomic structs
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//
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// For things that don't carry any arena-allocated data (and are
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// copy...), just add them to one of these lists as appropriate.
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// For things for which the type library provides traversal implementations
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// for all Interners, we only need to provide a Lift implementation.
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TrivialLiftImpls! {
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(),
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bool,
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usize,
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u64,
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// tidy-alphabetical-start
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crate::mir::interpret::AllocId,
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crate::mir::interpret::Scalar,
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crate::mir::Promoted,
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rustc_abi::ExternAbi,
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rustc_abi::Size,
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rustc_hir::Safety,
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rustc_type_ir::BoundConstness,
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rustc_type_ir::PredicatePolarity,
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// tidy-alphabetical-end
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}
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// For some things about which the type library does not know, or does not
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// provide any traversal implementations, we need to provide a traversal
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// implementation (only for TyCtxt<'_> interners).
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TrivialTypeTraversalImpls! {
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// tidy-alphabetical-start
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crate::infer::canonical::Certainty,
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crate::mir::BasicBlock,
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crate::mir::BindingForm<'tcx>,
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crate::mir::BlockTailInfo,
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crate::mir::BorrowKind,
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crate::mir::CastKind,
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crate::mir::ConstValue<'tcx>,
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crate::mir::CoroutineSavedLocal,
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crate::mir::FakeReadCause,
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crate::mir::Local,
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crate::mir::MirPhase,
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crate::mir::NullOp<'tcx>,
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crate::mir::Promoted,
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crate::mir::RawPtrKind,
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crate::mir::RetagKind,
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crate::mir::SourceInfo,
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crate::mir::SourceScope,
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crate::mir::SourceScopeLocalData,
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crate::mir::SwitchTargets,
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crate::traits::IsConstable,
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crate::traits::OverflowError,
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crate::ty::abstract_const::NotConstEvaluatable,
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crate::ty::adjustment::AutoBorrowMutability,
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crate::ty::adjustment::PointerCoercion,
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crate::ty::AdtKind,
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crate::ty::AssocItem,
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crate::ty::AssocKind,
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crate::ty::BoundRegion,
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crate::ty::BoundVar,
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crate::ty::InferConst,
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crate::ty::Placeholder<crate::ty::BoundRegion>,
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crate::ty::Placeholder<crate::ty::BoundTy>,
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crate::ty::Placeholder<ty::BoundVar>,
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crate::ty::UserTypeAnnotationIndex,
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crate::ty::ValTree<'tcx>,
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rustc_abi::FieldIdx,
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rustc_abi::VariantIdx,
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rustc_ast::InlineAsmOptions,
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rustc_ast::InlineAsmTemplatePiece,
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rustc_hir::CoroutineKind,
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rustc_hir::def_id::LocalDefId,
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rustc_hir::HirId,
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rustc_hir::MatchSource,
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rustc_hir::RangeEnd,
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rustc_span::Ident,
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rustc_span::Span,
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rustc_span::Symbol,
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rustc_target::asm::InlineAsmRegOrRegClass,
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// tidy-alphabetical-end
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}
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// For some things about which the type library does not know, or does not
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// provide any traversal implementations, we need to provide a traversal
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// implementation and a lift implementation (the former only for TyCtxt<'_>
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// interners).
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TrivialTypeTraversalAndLiftImpls! {
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// tidy-alphabetical-start
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crate::ty::instance::ReifyReason,
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crate::ty::ParamConst,
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crate::ty::ParamTy,
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rustc_hir::def_id::DefId,
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// tidy-alphabetical-end
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}
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///////////////////////////////////////////////////////////////////////////
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// Lift implementations
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impl<'tcx, T: Lift<TyCtxt<'tcx>>> Lift<TyCtxt<'tcx>> for Option<T> {
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type Lifted = Option<T::Lifted>;
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fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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Some(match self {
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Some(x) => Some(tcx.lift(x)?),
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None => None,
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})
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}
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}
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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Term<'a> {
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type Lifted = ty::Term<'tcx>;
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fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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match self.unpack() {
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TermKind::Ty(ty) => tcx.lift(ty).map(Into::into),
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TermKind::Const(c) => tcx.lift(c).map(Into::into),
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Traversal implementations.
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impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::AdtDef<'tcx> {
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fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, _visitor: &mut V) -> V::Result {
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V::Result::output()
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}
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}
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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Pattern<'tcx> {
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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
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self,
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folder: &mut F,
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) -> Result<Self, F::Error> {
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let pat = (*self).clone().try_fold_with(folder)?;
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Ok(if pat == *self { self } else { folder.cx().mk_pat(pat) })
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}
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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
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let pat = (*self).clone().fold_with(folder);
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if pat == *self { self } else { folder.cx().mk_pat(pat) }
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}
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}
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impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for Pattern<'tcx> {
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fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
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(**self).visit_with(visitor)
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}
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}
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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Ty<'tcx> {
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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
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self,
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folder: &mut F,
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) -> Result<Self, F::Error> {
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folder.try_fold_ty(self)
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}
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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
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folder.fold_ty(self)
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}
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}
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impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for Ty<'tcx> {
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fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
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visitor.visit_ty(*self)
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}
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}
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impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for Ty<'tcx> {
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fn try_super_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
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self,
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folder: &mut F,
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) -> Result<Self, F::Error> {
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let kind = match *self.kind() {
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ty::RawPtr(ty, mutbl) => ty::RawPtr(ty.try_fold_with(folder)?, mutbl),
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ty::Array(typ, sz) => ty::Array(typ.try_fold_with(folder)?, sz.try_fold_with(folder)?),
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ty::Slice(typ) => ty::Slice(typ.try_fold_with(folder)?),
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ty::Adt(tid, args) => ty::Adt(tid, args.try_fold_with(folder)?),
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ty::Dynamic(trait_ty, region, representation) => ty::Dynamic(
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trait_ty.try_fold_with(folder)?,
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region.try_fold_with(folder)?,
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representation,
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),
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ty::Tuple(ts) => ty::Tuple(ts.try_fold_with(folder)?),
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ty::FnDef(def_id, args) => ty::FnDef(def_id, args.try_fold_with(folder)?),
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ty::FnPtr(sig_tys, hdr) => ty::FnPtr(sig_tys.try_fold_with(folder)?, hdr),
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ty::UnsafeBinder(f) => ty::UnsafeBinder(f.try_fold_with(folder)?),
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ty::Ref(r, ty, mutbl) => {
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ty::Ref(r.try_fold_with(folder)?, ty.try_fold_with(folder)?, mutbl)
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}
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ty::Coroutine(did, args) => ty::Coroutine(did, args.try_fold_with(folder)?),
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ty::CoroutineWitness(did, args) => {
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ty::CoroutineWitness(did, args.try_fold_with(folder)?)
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}
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ty::Closure(did, args) => ty::Closure(did, args.try_fold_with(folder)?),
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ty::CoroutineClosure(did, args) => {
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ty::CoroutineClosure(did, args.try_fold_with(folder)?)
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}
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ty::Alias(kind, data) => ty::Alias(kind, data.try_fold_with(folder)?),
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ty::Pat(ty, pat) => ty::Pat(ty.try_fold_with(folder)?, pat.try_fold_with(folder)?),
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ty::Bool
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| ty::Char
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| ty::Str
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| ty::Int(_)
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| ty::Uint(_)
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| ty::Float(_)
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| ty::Error(_)
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| ty::Infer(_)
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| ty::Param(..)
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| ty::Bound(..)
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| ty::Placeholder(..)
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| ty::Never
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| ty::Foreign(..) => return Ok(self),
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};
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Ok(if *self.kind() == kind { self } else { folder.cx().mk_ty_from_kind(kind) })
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}
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fn super_fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
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let kind = match *self.kind() {
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ty::RawPtr(ty, mutbl) => ty::RawPtr(ty.fold_with(folder), mutbl),
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ty::Array(typ, sz) => ty::Array(typ.fold_with(folder), sz.fold_with(folder)),
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ty::Slice(typ) => ty::Slice(typ.fold_with(folder)),
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ty::Adt(tid, args) => ty::Adt(tid, args.fold_with(folder)),
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ty::Dynamic(trait_ty, region, representation) => {
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ty::Dynamic(trait_ty.fold_with(folder), region.fold_with(folder), representation)
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}
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ty::Tuple(ts) => ty::Tuple(ts.fold_with(folder)),
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ty::FnDef(def_id, args) => ty::FnDef(def_id, args.fold_with(folder)),
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ty::FnPtr(sig_tys, hdr) => ty::FnPtr(sig_tys.fold_with(folder), hdr),
|
|
ty::UnsafeBinder(f) => ty::UnsafeBinder(f.fold_with(folder)),
|
|
ty::Ref(r, ty, mutbl) => ty::Ref(r.fold_with(folder), ty.fold_with(folder), mutbl),
|
|
ty::Coroutine(did, args) => ty::Coroutine(did, args.fold_with(folder)),
|
|
ty::CoroutineWitness(did, args) => ty::CoroutineWitness(did, args.fold_with(folder)),
|
|
ty::Closure(did, args) => ty::Closure(did, args.fold_with(folder)),
|
|
ty::CoroutineClosure(did, args) => ty::CoroutineClosure(did, args.fold_with(folder)),
|
|
ty::Alias(kind, data) => ty::Alias(kind, data.fold_with(folder)),
|
|
ty::Pat(ty, pat) => ty::Pat(ty.fold_with(folder), pat.fold_with(folder)),
|
|
|
|
ty::Bool
|
|
| ty::Char
|
|
| ty::Str
|
|
| ty::Int(_)
|
|
| ty::Uint(_)
|
|
| ty::Float(_)
|
|
| ty::Error(_)
|
|
| ty::Infer(_)
|
|
| ty::Param(..)
|
|
| ty::Bound(..)
|
|
| ty::Placeholder(..)
|
|
| ty::Never
|
|
| ty::Foreign(..) => return self,
|
|
};
|
|
|
|
if *self.kind() == kind { self } else { folder.cx().mk_ty_from_kind(kind) }
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperVisitable<TyCtxt<'tcx>> for Ty<'tcx> {
|
|
fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
match self.kind() {
|
|
ty::RawPtr(ty, _mutbl) => ty.visit_with(visitor),
|
|
ty::Array(typ, sz) => {
|
|
try_visit!(typ.visit_with(visitor));
|
|
sz.visit_with(visitor)
|
|
}
|
|
ty::Slice(typ) => typ.visit_with(visitor),
|
|
ty::Adt(_, args) => args.visit_with(visitor),
|
|
ty::Dynamic(trait_ty, reg, _) => {
|
|
try_visit!(trait_ty.visit_with(visitor));
|
|
reg.visit_with(visitor)
|
|
}
|
|
ty::Tuple(ts) => ts.visit_with(visitor),
|
|
ty::FnDef(_, args) => args.visit_with(visitor),
|
|
ty::FnPtr(sig_tys, _) => sig_tys.visit_with(visitor),
|
|
ty::UnsafeBinder(f) => f.visit_with(visitor),
|
|
ty::Ref(r, ty, _) => {
|
|
try_visit!(r.visit_with(visitor));
|
|
ty.visit_with(visitor)
|
|
}
|
|
ty::Coroutine(_did, args) => args.visit_with(visitor),
|
|
ty::CoroutineWitness(_did, args) => args.visit_with(visitor),
|
|
ty::Closure(_did, args) => args.visit_with(visitor),
|
|
ty::CoroutineClosure(_did, args) => args.visit_with(visitor),
|
|
ty::Alias(_, data) => data.visit_with(visitor),
|
|
|
|
ty::Pat(ty, pat) => {
|
|
try_visit!(ty.visit_with(visitor));
|
|
pat.visit_with(visitor)
|
|
}
|
|
|
|
ty::Error(guar) => guar.visit_with(visitor),
|
|
|
|
ty::Bool
|
|
| ty::Char
|
|
| ty::Str
|
|
| ty::Int(_)
|
|
| ty::Uint(_)
|
|
| ty::Float(_)
|
|
| ty::Infer(_)
|
|
| ty::Bound(..)
|
|
| ty::Placeholder(..)
|
|
| ty::Param(..)
|
|
| ty::Never
|
|
| ty::Foreign(..) => V::Result::output(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ty::Region<'tcx> {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
folder.try_fold_region(self)
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
folder.fold_region(self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::Region<'tcx> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_region(*self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ty::Predicate<'tcx> {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
folder.try_fold_predicate(self)
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
folder.fold_predicate(self)
|
|
}
|
|
}
|
|
|
|
// FIXME(clause): This is wonky
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ty::Clause<'tcx> {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
Ok(folder.try_fold_predicate(self.as_predicate())?.expect_clause())
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
folder.fold_predicate(self.as_predicate()).expect_clause()
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::Predicate<'tcx> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_predicate(*self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::Clause<'tcx> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_predicate(self.as_predicate())
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Predicate<'tcx> {
|
|
fn try_super_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
let new = self.kind().try_fold_with(folder)?;
|
|
Ok(folder.cx().reuse_or_mk_predicate(self, new))
|
|
}
|
|
|
|
fn super_fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
let new = self.kind().fold_with(folder);
|
|
folder.cx().reuse_or_mk_predicate(self, new)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperVisitable<TyCtxt<'tcx>> for ty::Predicate<'tcx> {
|
|
fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
self.kind().visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::Clauses<'tcx> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_clauses(self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperVisitable<TyCtxt<'tcx>> for ty::Clauses<'tcx> {
|
|
fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
self.as_slice().visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ty::Const<'tcx> {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
folder.try_fold_const(self)
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
folder.fold_const(self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for ty::Const<'tcx> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_const(*self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Const<'tcx> {
|
|
fn try_super_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
let kind = match self.kind() {
|
|
ConstKind::Param(p) => ConstKind::Param(p.try_fold_with(folder)?),
|
|
ConstKind::Infer(i) => ConstKind::Infer(i.try_fold_with(folder)?),
|
|
ConstKind::Bound(d, b) => {
|
|
ConstKind::Bound(d.try_fold_with(folder)?, b.try_fold_with(folder)?)
|
|
}
|
|
ConstKind::Placeholder(p) => ConstKind::Placeholder(p.try_fold_with(folder)?),
|
|
ConstKind::Unevaluated(uv) => ConstKind::Unevaluated(uv.try_fold_with(folder)?),
|
|
ConstKind::Value(v) => ConstKind::Value(v.try_fold_with(folder)?),
|
|
ConstKind::Error(e) => ConstKind::Error(e.try_fold_with(folder)?),
|
|
ConstKind::Expr(e) => ConstKind::Expr(e.try_fold_with(folder)?),
|
|
};
|
|
if kind != self.kind() { Ok(folder.cx().mk_ct_from_kind(kind)) } else { Ok(self) }
|
|
}
|
|
|
|
fn super_fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
let kind = match self.kind() {
|
|
ConstKind::Param(p) => ConstKind::Param(p.fold_with(folder)),
|
|
ConstKind::Infer(i) => ConstKind::Infer(i.fold_with(folder)),
|
|
ConstKind::Bound(d, b) => ConstKind::Bound(d.fold_with(folder), b.fold_with(folder)),
|
|
ConstKind::Placeholder(p) => ConstKind::Placeholder(p.fold_with(folder)),
|
|
ConstKind::Unevaluated(uv) => ConstKind::Unevaluated(uv.fold_with(folder)),
|
|
ConstKind::Value(v) => ConstKind::Value(v.fold_with(folder)),
|
|
ConstKind::Error(e) => ConstKind::Error(e.fold_with(folder)),
|
|
ConstKind::Expr(e) => ConstKind::Expr(e.fold_with(folder)),
|
|
};
|
|
if kind != self.kind() { folder.cx().mk_ct_from_kind(kind) } else { self }
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeSuperVisitable<TyCtxt<'tcx>> for ty::Const<'tcx> {
|
|
fn super_visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
match self.kind() {
|
|
ConstKind::Param(p) => p.visit_with(visitor),
|
|
ConstKind::Infer(i) => i.visit_with(visitor),
|
|
ConstKind::Bound(d, b) => {
|
|
try_visit!(d.visit_with(visitor));
|
|
b.visit_with(visitor)
|
|
}
|
|
ConstKind::Placeholder(p) => p.visit_with(visitor),
|
|
ConstKind::Unevaluated(uv) => uv.visit_with(visitor),
|
|
ConstKind::Value(v) => v.visit_with(visitor),
|
|
ConstKind::Error(e) => e.visit_with(visitor),
|
|
ConstKind::Expr(e) => e.visit_with(visitor),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for rustc_span::ErrorGuaranteed {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_error(*self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_span::ErrorGuaranteed {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
_folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _folder: &mut F) -> Self {
|
|
self
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for TyAndLayout<'tcx, Ty<'tcx>> {
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
visitor.visit_ty(self.ty)
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeVisitable<TyCtxt<'tcx>> + Debug + Clone> TypeVisitable<TyCtxt<'tcx>>
|
|
for Spanned<T>
|
|
{
|
|
fn visit_with<V: TypeVisitor<TyCtxt<'tcx>>>(&self, visitor: &mut V) -> V::Result {
|
|
try_visit!(self.node.visit_with(visitor));
|
|
self.span.visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<TyCtxt<'tcx>> + Debug + Clone> TypeFoldable<TyCtxt<'tcx>>
|
|
for Spanned<T>
|
|
{
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
Ok(Spanned {
|
|
node: self.node.try_fold_with(folder)?,
|
|
span: self.span.try_fold_with(folder)?,
|
|
})
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, folder: &mut F) -> Self {
|
|
Spanned { node: self.node.fold_with(folder), span: self.span.fold_with(folder) }
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx ty::List<LocalDefId> {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
_folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
Ok(self)
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _folder: &mut F) -> Self {
|
|
self
|
|
}
|
|
}
|
|
|
|
macro_rules! list_fold {
|
|
($($ty:ty : $mk:ident),+ $(,)?) => {
|
|
$(
|
|
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for $ty {
|
|
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Result<Self, F::Error> {
|
|
ty::util::try_fold_list(self, folder, |tcx, v| tcx.$mk(v))
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(
|
|
self,
|
|
folder: &mut F,
|
|
) -> Self {
|
|
ty::util::fold_list(self, folder, |tcx, v| tcx.$mk(v))
|
|
}
|
|
}
|
|
)*
|
|
}
|
|
}
|
|
|
|
list_fold! {
|
|
ty::Clauses<'tcx> : mk_clauses,
|
|
&'tcx ty::List<ty::PolyExistentialPredicate<'tcx>> : mk_poly_existential_predicates,
|
|
&'tcx ty::List<PlaceElem<'tcx>> : mk_place_elems,
|
|
CanonicalVarInfos<'tcx> : mk_canonical_var_infos,
|
|
}
|