diff options
| -rw-r--r-- | src/librustc/ty/sty.rs | 2 | ||||
| -rw-r--r-- | src/librustc/ty/subst.rs | 10 |
2 files changed, 10 insertions, 2 deletions
diff --git a/src/librustc/ty/sty.rs b/src/librustc/ty/sty.rs index 3f09bf749ed..c1589b31de7 100644 --- a/src/librustc/ty/sty.rs +++ b/src/librustc/ty/sty.rs @@ -163,7 +163,7 @@ pub enum TyKind<'tcx> { /// The anonymous type of a generator. Used to represent the type of /// `|a| yield a`. - Generator(DefId, GeneratorSubsts<'tcx>, hir::GeneratorMovability), + Generator(DefId, SubstsRef<'tcx>, hir::GeneratorMovability), /// A type representin the types stored inside a generator. /// This should only appear in GeneratorInteriors. diff --git a/src/librustc/ty/subst.rs b/src/librustc/ty/subst.rs index 537192b0a2e..de98c098ea5 100644 --- a/src/librustc/ty/subst.rs +++ b/src/librustc/ty/subst.rs @@ -5,7 +5,7 @@ use crate::infer::canonical::Canonical; use crate::ty::{self, Lift, List, Ty, TyCtxt, InferConst, ParamConst}; use crate::ty::fold::{TypeFoldable, TypeFolder, TypeVisitor}; use crate::mir::interpret::ConstValue; -use crate::ty::sty::ClosureSubsts; +use crate::ty::sty::{ClosureSubsts, GeneratorSubsts}; use rustc_serialize::{self, Encodable, Encoder, Decodable, Decoder}; use syntax_pos::{Span, DUMMY_SP}; @@ -194,6 +194,14 @@ impl<'a, 'tcx> InternalSubsts<'tcx> { } } + /// Interpret these substitutions as the substitutions of a generator type. + /// Closure substitutions have a particular structure controlled by the + /// compiler that encodes information like the signature and generator kind; + /// see `ty::GeneratorSubsts` struct for more comments. + pub fn as_generator(&'a self) -> GeneratorSubsts<'a> { + GeneratorSubsts { substs: self } + } + /// Creates a `InternalSubsts` that maps each generic parameter to itself. pub fn identity_for_item(tcx: TyCtxt<'tcx>, def_id: DefId) -> SubstsRef<'tcx> { Self::for_item(tcx, def_id, |param, _| { |