1406 lines
46 KiB
Rust
1406 lines
46 KiB
Rust
//! This module contains implements of the `Lift` and `TypeFoldable`
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//! traits for various types in the Rust compiler. Most are written by
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//! hand, though we've recently added some macros (e.g.,
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//! `BraceStructLiftImpl!`) to help with the tedium.
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use crate::hir::def::Namespace;
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use crate::mir::ProjectionKind;
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use crate::mir::interpret::ConstValue;
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use crate::ty::{self, Lift, Ty, TyCtxt, InferConst};
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use crate::ty::fold::{TypeFoldable, TypeFolder, TypeVisitor};
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use crate::ty::print::{FmtPrinter, Printer};
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use rustc_index::vec::{IndexVec, Idx};
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use smallvec::SmallVec;
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use crate::mir::interpret;
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use std::fmt;
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use std::rc::Rc;
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use std::sync::Arc;
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impl fmt::Debug for ty::GenericParamDef {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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let type_name = match self.kind {
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ty::GenericParamDefKind::Lifetime => "Lifetime",
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ty::GenericParamDefKind::Type {..} => "Type",
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ty::GenericParamDefKind::Const => "Const",
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};
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write!(f, "{}({}, {:?}, {})",
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type_name,
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self.name,
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self.def_id,
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self.index)
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}
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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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FmtPrinter::new(tcx, f, Namespace::TypeNS)
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.print_def_path(self.def_id, &[])?;
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Ok(())
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})
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}
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}
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impl fmt::Debug for ty::AdtDef {
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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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FmtPrinter::new(tcx, f, Namespace::TypeNS)
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.print_def_path(self.did, &[])?;
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Ok(())
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})
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}
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}
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impl fmt::Debug for ty::ClosureUpvar<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "ClosureUpvar({:?},{:?})",
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self.res,
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self.ty)
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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| {
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tcx.hir().name(self.var_path.hir_id)
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});
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write!(f, "UpvarId({:?};`{}`;{:?})",
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self.var_path.hir_id,
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name,
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self.closure_expr_id)
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}
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}
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impl fmt::Debug for ty::UpvarBorrow<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "UpvarBorrow({:?}, {:?})",
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self.kind, self.region)
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}
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}
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impl fmt::Debug for ty::ExistentialTraitRef<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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fmt::Display::fmt(self, f)
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}
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}
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impl 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::BoundRegion {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::BrAnon(n) => write!(f, "BrAnon({:?})", n),
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ty::BrNamed(did, name) => {
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write!(f, "BrNamed({:?}:{:?}, {})",
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did.krate, did.index, name)
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}
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ty::BrEnv => write!(f, "BrEnv"),
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}
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}
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}
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impl fmt::Debug for ty::RegionKind {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::ReEarlyBound(ref data) => {
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write!(f, "ReEarlyBound({}, {})",
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data.index,
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data.name)
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}
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ty::ReClosureBound(ref vid) => {
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write!(f, "ReClosureBound({:?})", vid)
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}
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ty::ReLateBound(binder_id, ref bound_region) => {
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write!(f, "ReLateBound({:?}, {:?})", binder_id, bound_region)
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}
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ty::ReFree(ref fr) => fr.fmt(f),
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ty::ReScope(id) => write!(f, "ReScope({:?})", id),
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ty::ReStatic => write!(f, "ReStatic"),
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ty::ReVar(ref vid) => vid.fmt(f),
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ty::RePlaceholder(placeholder) => {
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write!(f, "RePlaceholder({:?})", placeholder)
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}
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ty::ReEmpty => write!(f, "ReEmpty"),
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ty::ReErased => write!(f, "ReErased"),
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}
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}
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}
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impl fmt::Debug for ty::FreeRegion {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "ReFree({:?}, {:?})", self.scope, self.bound_region)
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}
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}
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impl fmt::Debug for ty::Variance {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.write_str(match *self {
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ty::Covariant => "+",
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ty::Contravariant => "-",
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ty::Invariant => "o",
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ty::Bivariant => "*",
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})
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}
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}
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impl fmt::Debug for ty::FnSig<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "({:?}; c_variadic: {})->{:?}",
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self.inputs(), self.c_variadic, self.output())
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}
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}
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impl fmt::Debug for ty::TyVid {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "_#{}t", self.index)
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}
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}
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impl<'tcx> fmt::Debug for ty::ConstVid<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "_#{}c", self.index)
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}
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}
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impl fmt::Debug for ty::IntVid {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "_#{}i", self.index)
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}
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}
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impl fmt::Debug for ty::FloatVid {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "_#{}f", self.index)
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}
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}
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impl fmt::Debug for ty::RegionVid {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "'_#{}r", self.index())
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}
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}
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impl fmt::Debug for ty::InferTy {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::TyVar(ref v) => v.fmt(f),
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ty::IntVar(ref v) => v.fmt(f),
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ty::FloatVar(ref v) => v.fmt(f),
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ty::FreshTy(v) => write!(f, "FreshTy({:?})", v),
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ty::FreshIntTy(v) => write!(f, "FreshIntTy({:?})", v),
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ty::FreshFloatTy(v) => write!(f, "FreshFloatTy({:?})", v),
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}
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}
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}
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impl fmt::Debug for ty::IntVarValue {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::IntType(ref v) => v.fmt(f),
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ty::UintType(ref v) => v.fmt(f),
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}
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}
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}
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impl fmt::Debug for ty::FloatVarValue {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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self.0.fmt(f)
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}
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}
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impl fmt::Debug for ty::TraitRef<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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// FIXME(#59188) this is used across the compiler to print
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// a `TraitRef` qualified (with the Self type explicit),
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// instead of having a different way to make that choice.
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write!(f, "<{} as {}>", self.self_ty(), self)
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}
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}
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impl fmt::Debug for Ty<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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fmt::Display::fmt(self, 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 fmt::Debug for ty::TraitPredicate<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "TraitPredicate({:?})", self.trait_ref)
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}
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}
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impl fmt::Debug for ty::ProjectionPredicate<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "ProjectionPredicate({:?}, {:?})", self.projection_ty, self.ty)
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}
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}
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impl fmt::Debug for ty::Predicate<'tcx> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match *self {
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ty::Predicate::Trait(ref a) => a.fmt(f),
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ty::Predicate::Subtype(ref pair) => pair.fmt(f),
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ty::Predicate::RegionOutlives(ref pair) => pair.fmt(f),
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ty::Predicate::TypeOutlives(ref pair) => pair.fmt(f),
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ty::Predicate::Projection(ref pair) => pair.fmt(f),
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ty::Predicate::WellFormed(ty) => write!(f, "WellFormed({:?})", ty),
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ty::Predicate::ObjectSafe(trait_def_id) => {
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write!(f, "ObjectSafe({:?})", trait_def_id)
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}
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ty::Predicate::ClosureKind(closure_def_id, closure_substs, kind) => {
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write!(f, "ClosureKind({:?}, {:?}, {:?})",
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closure_def_id, closure_substs, kind)
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}
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ty::Predicate::ConstEvaluatable(def_id, substs) => {
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write!(f, "ConstEvaluatable({:?}, {:?})", def_id, substs)
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}
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}
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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 this list.
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CloneTypeFoldableAndLiftImpls! {
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(),
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bool,
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usize,
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crate::ty::layout::VariantIdx,
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u64,
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String,
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crate::middle::region::Scope,
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::syntax::ast::FloatTy,
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::syntax::ast::NodeId,
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::syntax_pos::symbol::Symbol,
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crate::hir::def::Res,
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crate::hir::def_id::DefId,
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crate::hir::InlineAsm,
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crate::hir::MatchSource,
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crate::hir::Mutability,
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crate::hir::Unsafety,
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::rustc_target::spec::abi::Abi,
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crate::mir::Local,
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crate::mir::Promoted,
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crate::traits::Reveal,
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crate::ty::adjustment::AutoBorrowMutability,
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crate::ty::AdtKind,
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// Including `BoundRegion` is a *bit* dubious, but direct
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// references to bound region appear in `ty::Error`, and aren't
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// really meant to be folded. In general, we can only fold a fully
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// general `Region`.
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crate::ty::BoundRegion,
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crate::ty::Placeholder<crate::ty::BoundRegion>,
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crate::ty::ClosureKind,
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crate::ty::FreeRegion,
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crate::ty::InferTy,
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crate::ty::IntVarValue,
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crate::ty::ParamConst,
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crate::ty::ParamTy,
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crate::ty::adjustment::PointerCast,
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crate::ty::RegionVid,
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crate::ty::UniverseIndex,
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crate::ty::Variance,
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::syntax_pos::Span,
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}
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///////////////////////////////////////////////////////////////////////////
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// Lift implementations
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// FIXME(eddyb) replace all the uses of `Option::map` with `?`.
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impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>> Lift<'tcx> for (A, B) {
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type Lifted = (A::Lifted, B::Lifted);
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&self.0).and_then(|a| tcx.lift(&self.1).map(|b| (a, b)))
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}
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}
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impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>, C: Lift<'tcx>> Lift<'tcx> for (A, B, C) {
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type Lifted = (A::Lifted, B::Lifted, C::Lifted);
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&self.0).and_then(|a| {
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tcx.lift(&self.1).and_then(|b| tcx.lift(&self.2).map(|c| (a, b, c)))
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})
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}
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}
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Option<T> {
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type Lifted = Option<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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match *self {
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Some(ref x) => tcx.lift(x).map(Some),
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None => Some(None)
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}
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}
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}
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impl<'tcx, T: Lift<'tcx>, E: Lift<'tcx>> Lift<'tcx> for Result<T, E> {
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type Lifted = Result<T::Lifted, E::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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match *self {
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Ok(ref x) => tcx.lift(x).map(Ok),
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Err(ref e) => tcx.lift(e).map(Err)
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}
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}
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}
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Box<T> {
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type Lifted = Box<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&**self).map(Box::new)
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}
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}
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Rc<T> {
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type Lifted = Rc<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&**self).map(Rc::new)
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}
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}
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Arc<T> {
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type Lifted = Arc<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&**self).map(Arc::new)
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}
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}
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for [T] {
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type Lifted = Vec<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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// type annotation needed to inform `projection_must_outlive`
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let mut result : Vec<<T as Lift<'tcx>>::Lifted>
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= Vec::with_capacity(self.len());
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for x in self {
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if let Some(value) = tcx.lift(x) {
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result.push(value);
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} else {
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return None;
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|
}
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|
}
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Some(result)
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|
}
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|
}
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|
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impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for Vec<T> {
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type Lifted = Vec<T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&self[..])
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}
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|
}
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|
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|
impl<'tcx, I: Idx, T: Lift<'tcx>> Lift<'tcx> for IndexVec<I, T> {
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type Lifted = IndexVec<I, T::Lifted>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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|
self.iter()
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|
.map(|e| tcx.lift(e))
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|
.collect()
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|
}
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|
}
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|
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|
impl<'a, 'tcx> Lift<'tcx> for ty::TraitRef<'a> {
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|
type Lifted = ty::TraitRef<'tcx>;
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|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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|
tcx.lift(&self.substs).map(|substs| ty::TraitRef {
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|
def_id: self.def_id,
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|
substs,
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})
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|
}
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|
}
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|
impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialTraitRef<'a> {
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type Lifted = ty::ExistentialTraitRef<'tcx>;
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fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
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tcx.lift(&self.substs).map(|substs| ty::ExistentialTraitRef {
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|
def_id: self.def_id,
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|
substs,
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})
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|
}
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|
}
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impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialPredicate<'a> {
|
|
type Lifted = ty::ExistentialPredicate<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
match self {
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|
ty::ExistentialPredicate::Trait(x) => {
|
|
tcx.lift(x).map(ty::ExistentialPredicate::Trait)
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|
}
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|
ty::ExistentialPredicate::Projection(x) => {
|
|
tcx.lift(x).map(ty::ExistentialPredicate::Projection)
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|
}
|
|
ty::ExistentialPredicate::AutoTrait(def_id) => {
|
|
Some(ty::ExistentialPredicate::AutoTrait(*def_id))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::TraitPredicate<'a> {
|
|
type Lifted = ty::TraitPredicate<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<ty::TraitPredicate<'tcx>> {
|
|
tcx.lift(&self.trait_ref).map(|trait_ref| ty::TraitPredicate {
|
|
trait_ref,
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::SubtypePredicate<'a> {
|
|
type Lifted = ty::SubtypePredicate<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<ty::SubtypePredicate<'tcx>> {
|
|
tcx.lift(&(self.a, self.b)).map(|(a, b)| ty::SubtypePredicate {
|
|
a_is_expected: self.a_is_expected,
|
|
a,
|
|
b,
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'tcx, A: Copy + Lift<'tcx>, B: Copy + Lift<'tcx>> Lift<'tcx> for ty::OutlivesPredicate<A, B> {
|
|
type Lifted = ty::OutlivesPredicate<A::Lifted, B::Lifted>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&(self.0, self.1)).map(|(a, b)| ty::OutlivesPredicate(a, b))
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::ProjectionTy<'a> {
|
|
type Lifted = ty::ProjectionTy<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<ty::ProjectionTy<'tcx>> {
|
|
tcx.lift(&self.substs).map(|substs| {
|
|
ty::ProjectionTy {
|
|
item_def_id: self.item_def_id,
|
|
substs,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::ProjectionPredicate<'a> {
|
|
type Lifted = ty::ProjectionPredicate<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<ty::ProjectionPredicate<'tcx>> {
|
|
tcx.lift(&(self.projection_ty, self.ty)).map(|(projection_ty, ty)| {
|
|
ty::ProjectionPredicate {
|
|
projection_ty,
|
|
ty,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::ExistentialProjection<'a> {
|
|
type Lifted = ty::ExistentialProjection<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.substs).map(|substs| {
|
|
ty::ExistentialProjection {
|
|
substs,
|
|
ty: tcx.lift(&self.ty).expect("type must lift when substs do"),
|
|
item_def_id: self.item_def_id,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::Predicate<'a> {
|
|
type Lifted = ty::Predicate<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
match *self {
|
|
ty::Predicate::Trait(ref binder) => {
|
|
tcx.lift(binder).map(ty::Predicate::Trait)
|
|
}
|
|
ty::Predicate::Subtype(ref binder) => {
|
|
tcx.lift(binder).map(ty::Predicate::Subtype)
|
|
}
|
|
ty::Predicate::RegionOutlives(ref binder) => {
|
|
tcx.lift(binder).map(ty::Predicate::RegionOutlives)
|
|
}
|
|
ty::Predicate::TypeOutlives(ref binder) => {
|
|
tcx.lift(binder).map(ty::Predicate::TypeOutlives)
|
|
}
|
|
ty::Predicate::Projection(ref binder) => {
|
|
tcx.lift(binder).map(ty::Predicate::Projection)
|
|
}
|
|
ty::Predicate::WellFormed(ty) => {
|
|
tcx.lift(&ty).map(ty::Predicate::WellFormed)
|
|
}
|
|
ty::Predicate::ClosureKind(closure_def_id, closure_substs, kind) => {
|
|
tcx.lift(&closure_substs)
|
|
.map(|closure_substs| ty::Predicate::ClosureKind(closure_def_id,
|
|
closure_substs,
|
|
kind))
|
|
}
|
|
ty::Predicate::ObjectSafe(trait_def_id) => {
|
|
Some(ty::Predicate::ObjectSafe(trait_def_id))
|
|
}
|
|
ty::Predicate::ConstEvaluatable(def_id, substs) => {
|
|
tcx.lift(&substs).map(|substs| {
|
|
ty::Predicate::ConstEvaluatable(def_id, substs)
|
|
})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::Binder<T> {
|
|
type Lifted = ty::Binder<T::Lifted>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(self.skip_binder()).map(ty::Binder::bind)
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::ParamEnv<'a> {
|
|
type Lifted = ty::ParamEnv<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.caller_bounds).map(|caller_bounds| {
|
|
ty::ParamEnv {
|
|
reveal: self.reveal,
|
|
caller_bounds,
|
|
def_id: self.def_id,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::ParamEnvAnd<'a, T> {
|
|
type Lifted = ty::ParamEnvAnd<'tcx, T::Lifted>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.param_env).and_then(|param_env| {
|
|
tcx.lift(&self.value).map(|value| {
|
|
ty::ParamEnvAnd {
|
|
param_env,
|
|
value,
|
|
}
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::ClosureSubsts<'a> {
|
|
type Lifted = ty::ClosureSubsts<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.substs).map(|substs| {
|
|
ty::ClosureSubsts { substs }
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::GeneratorSubsts<'a> {
|
|
type Lifted = ty::GeneratorSubsts<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.substs).map(|substs| {
|
|
ty::GeneratorSubsts { substs }
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::Adjustment<'a> {
|
|
type Lifted = ty::adjustment::Adjustment<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.kind).and_then(|kind| {
|
|
tcx.lift(&self.target).map(|target| {
|
|
ty::adjustment::Adjustment { kind, target }
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::Adjust<'a> {
|
|
type Lifted = ty::adjustment::Adjust<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
match *self {
|
|
ty::adjustment::Adjust::NeverToAny =>
|
|
Some(ty::adjustment::Adjust::NeverToAny),
|
|
ty::adjustment::Adjust::Pointer(ptr) =>
|
|
Some(ty::adjustment::Adjust::Pointer(ptr)),
|
|
ty::adjustment::Adjust::Deref(ref overloaded) => {
|
|
tcx.lift(overloaded).map(ty::adjustment::Adjust::Deref)
|
|
}
|
|
ty::adjustment::Adjust::Borrow(ref autoref) => {
|
|
tcx.lift(autoref).map(ty::adjustment::Adjust::Borrow)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::OverloadedDeref<'a> {
|
|
type Lifted = ty::adjustment::OverloadedDeref<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.region).map(|region| {
|
|
ty::adjustment::OverloadedDeref {
|
|
region,
|
|
mutbl: self.mutbl,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::adjustment::AutoBorrow<'a> {
|
|
type Lifted = ty::adjustment::AutoBorrow<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
match *self {
|
|
ty::adjustment::AutoBorrow::Ref(r, m) => {
|
|
tcx.lift(&r).map(|r| ty::adjustment::AutoBorrow::Ref(r, m))
|
|
}
|
|
ty::adjustment::AutoBorrow::RawPtr(m) => {
|
|
Some(ty::adjustment::AutoBorrow::RawPtr(m))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::GenSig<'a> {
|
|
type Lifted = ty::GenSig<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&(self.yield_ty, self.return_ty))
|
|
.map(|(yield_ty, return_ty)| {
|
|
ty::GenSig {
|
|
yield_ty,
|
|
return_ty,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::FnSig<'a> {
|
|
type Lifted = ty::FnSig<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.inputs_and_output).map(|x| {
|
|
ty::FnSig {
|
|
inputs_and_output: x,
|
|
c_variadic: self.c_variadic,
|
|
unsafety: self.unsafety,
|
|
abi: self.abi,
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: Lift<'tcx>> Lift<'tcx> for ty::error::ExpectedFound<T> {
|
|
type Lifted = ty::error::ExpectedFound<T::Lifted>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
tcx.lift(&self.expected).and_then(|expected| {
|
|
tcx.lift(&self.found).map(|found| {
|
|
ty::error::ExpectedFound {
|
|
expected,
|
|
found,
|
|
}
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::error::TypeError<'a> {
|
|
type Lifted = ty::error::TypeError<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
use crate::ty::error::TypeError::*;
|
|
|
|
Some(match *self {
|
|
Mismatch => Mismatch,
|
|
UnsafetyMismatch(x) => UnsafetyMismatch(x),
|
|
AbiMismatch(x) => AbiMismatch(x),
|
|
Mutability => Mutability,
|
|
TupleSize(x) => TupleSize(x),
|
|
FixedArraySize(x) => FixedArraySize(x),
|
|
ArgCount => ArgCount,
|
|
RegionsDoesNotOutlive(a, b) => {
|
|
return tcx.lift(&(a, b)).map(|(a, b)| RegionsDoesNotOutlive(a, b))
|
|
}
|
|
RegionsInsufficientlyPolymorphic(a, b) => {
|
|
return tcx.lift(&b).map(|b| RegionsInsufficientlyPolymorphic(a, b))
|
|
}
|
|
RegionsOverlyPolymorphic(a, b) => {
|
|
return tcx.lift(&b).map(|b| RegionsOverlyPolymorphic(a, b))
|
|
}
|
|
RegionsPlaceholderMismatch => RegionsPlaceholderMismatch,
|
|
IntMismatch(x) => IntMismatch(x),
|
|
FloatMismatch(x) => FloatMismatch(x),
|
|
Traits(x) => Traits(x),
|
|
VariadicMismatch(x) => VariadicMismatch(x),
|
|
CyclicTy(t) => return tcx.lift(&t).map(|t| CyclicTy(t)),
|
|
ProjectionMismatched(x) => ProjectionMismatched(x),
|
|
ProjectionBoundsLength(x) => ProjectionBoundsLength(x),
|
|
Sorts(ref x) => return tcx.lift(x).map(Sorts),
|
|
ExistentialMismatch(ref x) => return tcx.lift(x).map(ExistentialMismatch),
|
|
ConstMismatch(ref x) => return tcx.lift(x).map(ConstMismatch),
|
|
IntrinsicCast => IntrinsicCast,
|
|
})
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::InstanceDef<'a> {
|
|
type Lifted = ty::InstanceDef<'tcx>;
|
|
fn lift_to_tcx(&self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
|
|
match *self {
|
|
ty::InstanceDef::Item(def_id) =>
|
|
Some(ty::InstanceDef::Item(def_id)),
|
|
ty::InstanceDef::VtableShim(def_id) =>
|
|
Some(ty::InstanceDef::VtableShim(def_id)),
|
|
ty::InstanceDef::Intrinsic(def_id) =>
|
|
Some(ty::InstanceDef::Intrinsic(def_id)),
|
|
ty::InstanceDef::FnPtrShim(def_id, ref ty) =>
|
|
Some(ty::InstanceDef::FnPtrShim(def_id, tcx.lift(ty)?)),
|
|
ty::InstanceDef::Virtual(def_id, n) =>
|
|
Some(ty::InstanceDef::Virtual(def_id, n)),
|
|
ty::InstanceDef::ClosureOnceShim { call_once } =>
|
|
Some(ty::InstanceDef::ClosureOnceShim { call_once }),
|
|
ty::InstanceDef::DropGlue(def_id, ref ty) =>
|
|
Some(ty::InstanceDef::DropGlue(def_id, tcx.lift(ty)?)),
|
|
ty::InstanceDef::CloneShim(def_id, ref ty) =>
|
|
Some(ty::InstanceDef::CloneShim(def_id, tcx.lift(ty)?)),
|
|
}
|
|
}
|
|
}
|
|
|
|
BraceStructLiftImpl! {
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::TypeAndMut<'a> {
|
|
type Lifted = ty::TypeAndMut<'tcx>;
|
|
ty, mutbl
|
|
}
|
|
}
|
|
|
|
BraceStructLiftImpl! {
|
|
impl<'a, 'tcx> Lift<'tcx> for ty::Instance<'a> {
|
|
type Lifted = ty::Instance<'tcx>;
|
|
def, substs
|
|
}
|
|
}
|
|
|
|
BraceStructLiftImpl! {
|
|
impl<'a, 'tcx> Lift<'tcx> for interpret::GlobalId<'a> {
|
|
type Lifted = interpret::GlobalId<'tcx>;
|
|
instance, promoted
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
// TypeFoldable implementations.
|
|
//
|
|
// Ideally, each type should invoke `folder.fold_foo(self)` and
|
|
// nothing else. In some cases, though, we haven't gotten around to
|
|
// adding methods on the `folder` yet, and thus the folding is
|
|
// hard-coded here. This is less-flexible, because folders cannot
|
|
// override the behavior, but there are a lot of random types and one
|
|
// can easily refactor the folding into the TypeFolder trait as
|
|
// needed.
|
|
|
|
/// AdtDefs are basically the same as a DefId.
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::AdtDef {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, _folder: &mut F) -> Self {
|
|
*self
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> bool {
|
|
false
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>, U: TypeFoldable<'tcx>> TypeFoldable<'tcx> for (T, U) {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> (T, U) {
|
|
(self.0.fold_with(folder), self.1.fold_with(folder))
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.0.visit_with(visitor) || self.1.visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx, T> TypeFoldable<'tcx> for Option<T> {
|
|
(Some)(a),
|
|
(None),
|
|
} where T: TypeFoldable<'tcx>
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx, T, E> TypeFoldable<'tcx> for Result<T, E> {
|
|
(Ok)(a),
|
|
(Err)(a),
|
|
} where T: TypeFoldable<'tcx>, E: TypeFoldable<'tcx>,
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Rc<T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
Rc::new((**self).fold_with(folder))
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
(**self).visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Arc<T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
Arc::new((**self).fold_with(folder))
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
(**self).visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let content: T = (**self).fold_with(folder);
|
|
box content
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
(**self).visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Vec<T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
self.iter().map(|t| t.fold_with(folder)).collect()
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|t| t.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for Box<[T]> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
self.iter().map(|t| t.fold_with(folder)).collect::<Vec<_>>().into_boxed_slice()
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|t| t.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>> TypeFoldable<'tcx> for ty::Binder<T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
self.map_bound_ref(|ty| ty.fold_with(folder))
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
folder.fold_binder(self)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.skip_binder().visit_with(visitor)
|
|
}
|
|
|
|
fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
visitor.visit_binder(self)
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ParamEnv<'tcx> { reveal, caller_bounds, def_id }
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::ExistentialPredicate<'tcx>> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let v = self.iter().map(|p| p.fold_with(folder)).collect::<SmallVec<[_; 8]>>();
|
|
folder.tcx().intern_existential_predicates(&v)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|p| p.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ExistentialPredicate<'tcx> {
|
|
(ty::ExistentialPredicate::Trait)(a),
|
|
(ty::ExistentialPredicate::Projection)(a),
|
|
(ty::ExistentialPredicate::AutoTrait)(a),
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<Ty<'tcx>> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let v = self.iter().map(|t| t.fold_with(folder)).collect::<SmallVec<[_; 8]>>();
|
|
folder.tcx().intern_type_list(&v)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|t| t.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ProjectionKind> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let v = self.iter().map(|t| t.fold_with(folder)).collect::<SmallVec<[_; 8]>>();
|
|
folder.tcx().intern_projs(&v)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|t| t.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::instance::Instance<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
use crate::ty::InstanceDef::*;
|
|
Self {
|
|
substs: self.substs.fold_with(folder),
|
|
def: match self.def {
|
|
Item(did) => Item(did.fold_with(folder)),
|
|
VtableShim(did) => VtableShim(did.fold_with(folder)),
|
|
Intrinsic(did) => Intrinsic(did.fold_with(folder)),
|
|
FnPtrShim(did, ty) => FnPtrShim(
|
|
did.fold_with(folder),
|
|
ty.fold_with(folder),
|
|
),
|
|
Virtual(did, i) => Virtual(
|
|
did.fold_with(folder),
|
|
i,
|
|
),
|
|
ClosureOnceShim { call_once } => ClosureOnceShim {
|
|
call_once: call_once.fold_with(folder),
|
|
},
|
|
DropGlue(did, ty) => DropGlue(
|
|
did.fold_with(folder),
|
|
ty.fold_with(folder),
|
|
),
|
|
CloneShim(did, ty) => CloneShim(
|
|
did.fold_with(folder),
|
|
ty.fold_with(folder),
|
|
),
|
|
},
|
|
}
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
use crate::ty::InstanceDef::*;
|
|
self.substs.visit_with(visitor) ||
|
|
match self.def {
|
|
Item(did) | VtableShim(did) | Intrinsic(did) | Virtual(did, _) => {
|
|
did.visit_with(visitor)
|
|
},
|
|
FnPtrShim(did, ty) | CloneShim(did, ty) => {
|
|
did.visit_with(visitor) || ty.visit_with(visitor)
|
|
},
|
|
DropGlue(did, ty) => {
|
|
did.visit_with(visitor) || ty.visit_with(visitor)
|
|
},
|
|
ClosureOnceShim { call_once } => call_once.visit_with(visitor),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for interpret::GlobalId<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
Self {
|
|
instance: self.instance.fold_with(folder),
|
|
promoted: self.promoted
|
|
}
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.instance.visit_with(visitor)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for Ty<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let kind = match self.kind {
|
|
ty::RawPtr(tm) => ty::RawPtr(tm.fold_with(folder)),
|
|
ty::Array(typ, sz) => ty::Array(typ.fold_with(folder), sz.fold_with(folder)),
|
|
ty::Slice(typ) => ty::Slice(typ.fold_with(folder)),
|
|
ty::Adt(tid, substs) => ty::Adt(tid, substs.fold_with(folder)),
|
|
ty::Dynamic(ref trait_ty, ref region) =>
|
|
ty::Dynamic(trait_ty.fold_with(folder), region.fold_with(folder)),
|
|
ty::Tuple(ts) => ty::Tuple(ts.fold_with(folder)),
|
|
ty::FnDef(def_id, substs) => {
|
|
ty::FnDef(def_id, substs.fold_with(folder))
|
|
}
|
|
ty::FnPtr(f) => ty::FnPtr(f.fold_with(folder)),
|
|
ty::Ref(ref r, ty, mutbl) => {
|
|
ty::Ref(r.fold_with(folder), ty.fold_with(folder), mutbl)
|
|
}
|
|
ty::Generator(did, substs, movability) => {
|
|
ty::Generator(
|
|
did,
|
|
substs.fold_with(folder),
|
|
movability)
|
|
}
|
|
ty::GeneratorWitness(types) => ty::GeneratorWitness(types.fold_with(folder)),
|
|
ty::Closure(did, substs) => ty::Closure(did, substs.fold_with(folder)),
|
|
ty::Projection(ref data) => ty::Projection(data.fold_with(folder)),
|
|
ty::UnnormalizedProjection(ref data) => {
|
|
ty::UnnormalizedProjection(data.fold_with(folder))
|
|
}
|
|
ty::Opaque(did, substs) => ty::Opaque(did, substs.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.tcx().mk_ty(kind)
|
|
}
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
folder.fold_ty(*self)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
match self.kind {
|
|
ty::RawPtr(ref tm) => tm.visit_with(visitor),
|
|
ty::Array(typ, sz) => typ.visit_with(visitor) || sz.visit_with(visitor),
|
|
ty::Slice(typ) => typ.visit_with(visitor),
|
|
ty::Adt(_, substs) => substs.visit_with(visitor),
|
|
ty::Dynamic(ref trait_ty, ref reg) =>
|
|
trait_ty.visit_with(visitor) || reg.visit_with(visitor),
|
|
ty::Tuple(ts) => ts.visit_with(visitor),
|
|
ty::FnDef(_, substs) => substs.visit_with(visitor),
|
|
ty::FnPtr(ref f) => f.visit_with(visitor),
|
|
ty::Ref(r, ty, _) => r.visit_with(visitor) || ty.visit_with(visitor),
|
|
ty::Generator(_did, ref substs, _) => {
|
|
substs.visit_with(visitor)
|
|
}
|
|
ty::GeneratorWitness(ref types) => types.visit_with(visitor),
|
|
ty::Closure(_did, ref substs) => substs.visit_with(visitor),
|
|
ty::Projection(ref data) | ty::UnnormalizedProjection(ref data) => {
|
|
data.visit_with(visitor)
|
|
}
|
|
ty::Opaque(_, ref substs) => substs.visit_with(visitor),
|
|
|
|
ty::Bool |
|
|
ty::Char |
|
|
ty::Str |
|
|
ty::Int(_) |
|
|
ty::Uint(_) |
|
|
ty::Float(_) |
|
|
ty::Error |
|
|
ty::Infer(_) |
|
|
ty::Bound(..) |
|
|
ty::Placeholder(..) |
|
|
ty::Param(..) |
|
|
ty::Never |
|
|
ty::Foreign(..) => false,
|
|
}
|
|
}
|
|
|
|
fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
visitor.visit_ty(self)
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::TypeAndMut<'tcx> {
|
|
ty, mutbl
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::GenSig<'tcx> {
|
|
yield_ty, return_ty
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::FnSig<'tcx> {
|
|
inputs_and_output, c_variadic, unsafety, abi
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::TraitRef<'tcx> { def_id, substs }
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ExistentialTraitRef<'tcx> { def_id, substs }
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ImplHeader<'tcx> {
|
|
impl_def_id,
|
|
self_ty,
|
|
trait_ref,
|
|
predicates,
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::Region<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, _folder: &mut F) -> Self {
|
|
*self
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
folder.fold_region(*self)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> bool {
|
|
false
|
|
}
|
|
|
|
fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
visitor.visit_region(*self)
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ClosureSubsts<'tcx> {
|
|
substs,
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::GeneratorSubsts<'tcx> {
|
|
substs,
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::adjustment::Adjustment<'tcx> {
|
|
kind,
|
|
target,
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::adjustment::Adjust<'tcx> {
|
|
(ty::adjustment::Adjust::NeverToAny),
|
|
(ty::adjustment::Adjust::Pointer)(a),
|
|
(ty::adjustment::Adjust::Deref)(a),
|
|
(ty::adjustment::Adjust::Borrow)(a),
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::adjustment::OverloadedDeref<'tcx> {
|
|
region, mutbl,
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::adjustment::AutoBorrow<'tcx> {
|
|
(ty::adjustment::AutoBorrow::Ref)(a, b),
|
|
(ty::adjustment::AutoBorrow::RawPtr)(m),
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::GenericPredicates<'tcx> {
|
|
parent, predicates
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::List<ty::Predicate<'tcx>> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
let v = self.iter().map(|p| p.fold_with(folder)).collect::<SmallVec<[_; 8]>>();
|
|
folder.tcx().intern_predicates(&v)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|p| p.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::Predicate<'tcx> {
|
|
(ty::Predicate::Trait)(a),
|
|
(ty::Predicate::Subtype)(a),
|
|
(ty::Predicate::RegionOutlives)(a),
|
|
(ty::Predicate::TypeOutlives)(a),
|
|
(ty::Predicate::Projection)(a),
|
|
(ty::Predicate::WellFormed)(a),
|
|
(ty::Predicate::ClosureKind)(a, b, c),
|
|
(ty::Predicate::ObjectSafe)(a),
|
|
(ty::Predicate::ConstEvaluatable)(a, b),
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ProjectionPredicate<'tcx> {
|
|
projection_ty, ty
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ExistentialProjection<'tcx> {
|
|
ty, substs, item_def_id
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ProjectionTy<'tcx> {
|
|
substs, item_def_id
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::InstantiatedPredicates<'tcx> {
|
|
predicates
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx, T> TypeFoldable<'tcx> for ty::ParamEnvAnd<'tcx, T> {
|
|
param_env, value
|
|
} where T: TypeFoldable<'tcx>
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::SubtypePredicate<'tcx> {
|
|
a_is_expected, a, b
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::TraitPredicate<'tcx> {
|
|
trait_ref
|
|
}
|
|
}
|
|
|
|
TupleStructTypeFoldableImpl! {
|
|
impl<'tcx,T,U> TypeFoldable<'tcx> for ty::OutlivesPredicate<T,U> {
|
|
a, b
|
|
} where T : TypeFoldable<'tcx>, U : TypeFoldable<'tcx>,
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::ClosureUpvar<'tcx> {
|
|
res, span, ty
|
|
}
|
|
}
|
|
|
|
BraceStructTypeFoldableImpl! {
|
|
impl<'tcx, T> TypeFoldable<'tcx> for ty::error::ExpectedFound<T> {
|
|
expected, found
|
|
} where T: TypeFoldable<'tcx>
|
|
}
|
|
|
|
impl<'tcx, T: TypeFoldable<'tcx>, I: Idx> TypeFoldable<'tcx> for IndexVec<I, T> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
self.iter().map(|x| x.fold_with(folder)).collect()
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.iter().any(|t| t.visit_with(visitor))
|
|
}
|
|
}
|
|
|
|
EnumTypeFoldableImpl! {
|
|
impl<'tcx> TypeFoldable<'tcx> for ty::error::TypeError<'tcx> {
|
|
(ty::error::TypeError::Mismatch),
|
|
(ty::error::TypeError::UnsafetyMismatch)(x),
|
|
(ty::error::TypeError::AbiMismatch)(x),
|
|
(ty::error::TypeError::Mutability),
|
|
(ty::error::TypeError::TupleSize)(x),
|
|
(ty::error::TypeError::FixedArraySize)(x),
|
|
(ty::error::TypeError::ArgCount),
|
|
(ty::error::TypeError::RegionsDoesNotOutlive)(a, b),
|
|
(ty::error::TypeError::RegionsInsufficientlyPolymorphic)(a, b),
|
|
(ty::error::TypeError::RegionsOverlyPolymorphic)(a, b),
|
|
(ty::error::TypeError::RegionsPlaceholderMismatch),
|
|
(ty::error::TypeError::IntMismatch)(x),
|
|
(ty::error::TypeError::FloatMismatch)(x),
|
|
(ty::error::TypeError::Traits)(x),
|
|
(ty::error::TypeError::VariadicMismatch)(x),
|
|
(ty::error::TypeError::CyclicTy)(t),
|
|
(ty::error::TypeError::ProjectionMismatched)(x),
|
|
(ty::error::TypeError::ProjectionBoundsLength)(x),
|
|
(ty::error::TypeError::Sorts)(x),
|
|
(ty::error::TypeError::ExistentialMismatch)(x),
|
|
(ty::error::TypeError::ConstMismatch)(x),
|
|
(ty::error::TypeError::IntrinsicCast),
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::Const<'tcx> {
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|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
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|
let ty = self.ty.fold_with(folder);
|
|
let val = self.val.fold_with(folder);
|
|
folder.tcx().mk_const(ty::Const {
|
|
ty,
|
|
val
|
|
})
|
|
}
|
|
|
|
fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
folder.fold_const(*self)
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
self.ty.visit_with(visitor) || self.val.visit_with(visitor)
|
|
}
|
|
|
|
fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
visitor.visit_const(self)
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for ConstValue<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
|
|
match *self {
|
|
ConstValue::ByRef { alloc, offset } =>
|
|
ConstValue::ByRef { alloc, offset },
|
|
ConstValue::Infer(ic) => ConstValue::Infer(ic.fold_with(folder)),
|
|
ConstValue::Param(p) => ConstValue::Param(p.fold_with(folder)),
|
|
ConstValue::Placeholder(p) => ConstValue::Placeholder(p),
|
|
ConstValue::Scalar(a) => ConstValue::Scalar(a),
|
|
ConstValue::Slice { data, start, end } => ConstValue::Slice { data, start, end },
|
|
ConstValue::Unevaluated(did, substs)
|
|
=> ConstValue::Unevaluated(did, substs.fold_with(folder)),
|
|
}
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool {
|
|
match *self {
|
|
ConstValue::ByRef { .. } => false,
|
|
ConstValue::Infer(ic) => ic.visit_with(visitor),
|
|
ConstValue::Param(p) => p.visit_with(visitor),
|
|
ConstValue::Placeholder(_) => false,
|
|
ConstValue::Scalar(_) => false,
|
|
ConstValue::Slice { .. } => false,
|
|
ConstValue::Unevaluated(_, substs) => substs.visit_with(visitor),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'tcx> TypeFoldable<'tcx> for InferConst<'tcx> {
|
|
fn super_fold_with<F: TypeFolder<'tcx>>(&self, _folder: &mut F) -> Self {
|
|
*self
|
|
}
|
|
|
|
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, _visitor: &mut V) -> bool {
|
|
false
|
|
}
|
|
}
|