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This commit is contained in:
Roxane 2020-10-27 18:32:50 -04:00
parent f0ae24e100
commit 5229571a05
3 changed files with 20 additions and 11 deletions
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1
Cargo.lock
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@ -3883,7 +3883,6 @@ version = "0.0.0"
dependencies = [
"bitflags",
"chalk-ir",
"either",
"measureme 9.0.0",
"polonius-engine",
"rustc-rayon-core",

1
compiler/rustc_middle/Cargo.toml
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@ -8,7 +8,6 @@ edition = "2018"
doctest = false
[dependencies]
either = "1.5.0"
rustc_arena = { path = "../rustc_arena" }
bitflags = "1.2.1"
tracing = "0.1"

29
compiler/rustc_middle/src/ty/sty.rs
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@ -5,8 +5,6 @@
use self::InferTy::*;
use self::TyKind::*;
use either::Either;
use crate::infer::canonical::Canonical;
use crate::ty::subst::{GenericArg, InternalSubsts, Subst, SubstsRef};
use crate::ty::{
@ -396,11 +394,13 @@ pub fn parent_substs(self) -> &'tcx [GenericArg<'tcx>] {
#[inline]
pub fn upvar_tys(self) -> impl Iterator<Item = Ty<'tcx>> + 'tcx {
match self.tupled_upvars_ty().kind() {
TyKind::Error(_) => Either::Left(std::iter::empty()),
TyKind::Tuple(..) => Either::Right(self.tupled_upvars_ty().tuple_fields()),
TyKind::Error(_) => None,
TyKind::Tuple(..) => Some(self.tupled_upvars_ty().tuple_fields()),
TyKind::Infer(_) => bug!("upvar_tys called before capture types are inferred"),
ty => bug!("Unexpected representation of upvar types tuple {:?}", ty),
}
.into_iter()
.flatten()
}
/// Returns the tuple type representing the upvars for this closure.
@ -531,11 +531,13 @@ pub fn witness(self) -> Ty<'tcx> {
#[inline]
pub fn upvar_tys(self) -> impl Iterator<Item = Ty<'tcx>> + 'tcx {
match self.tupled_upvars_ty().kind() {
TyKind::Error(_) => Either::Left(std::iter::empty()),
TyKind::Tuple(..) => Either::Right(self.tupled_upvars_ty().tuple_fields()),
TyKind::Error(_) => None,
TyKind::Tuple(..) => Some(self.tupled_upvars_ty().tuple_fields()),
TyKind::Infer(_) => bug!("upvar_tys called before capture types are inferred"),
ty => bug!("Unexpected representation of upvar types tuple {:?}", ty),
}
.into_iter()
.flatten()
}
/// Returns the tuple type representing the upvars for this generator.
@ -683,10 +685,19 @@ impl<'tcx> UpvarSubsts<'tcx> {
/// empty iterator is returned.
#[inline]
pub fn upvar_tys(self) -> impl Iterator<Item = Ty<'tcx>> + 'tcx {
match self {
UpvarSubsts::Closure(substs) => Either::Left(substs.as_closure().upvar_tys()),
UpvarSubsts::Generator(substs) => Either::Right(substs.as_generator().upvar_tys()),
let tupled_tys = match self {
UpvarSubsts::Closure(substs) => substs.as_closure().tupled_upvars_ty(),
UpvarSubsts::Generator(substs) => substs.as_generator().tupled_upvars_ty(),
};
match tupled_tys.kind() {
TyKind::Error(_) => None,
TyKind::Tuple(..) => Some(self.tupled_upvars_ty().tuple_fields()),
TyKind::Infer(_) => bug!("upvar_tys called before capture types are inferred"),
ty => bug!("Unexpected representation of upvar types tuple {:?}", ty),
}
.into_iter()
.flatten()
}
#[inline]