Inline the rest of box_region

2 files changed, 0 insertions, 82 deletions

diff --git a/compiler/rustc_data_structures/src/box_region.rs b/compiler/rustc_data_structures/src/box_region.rs
deleted file mode 100644
index a1a757b7054..00000000000
--- a/compiler/rustc_data_structures/src/box_region.rs
+++ /dev/null
@@ -1,80 +0,0 @@
-//! This module provides a way to deal with self-referential data.
-//!
-//! The main idea is to allocate such data in a generator frame and then
-//! give access to it by executing user-provided closures inside that generator.
-//! The module provides a safe abstraction for the latter task.
-//!
-//! The interface consists of two exported macros meant to be used together:
-//! * `declare_box_region_type` wraps a generator inside a struct with `access`
-//!   method which accepts closures.
-//! * `box_region_allow_access` is a helper which should be called inside
-//!   a generator to actually execute those closures.
-
-use std::marker::PhantomData;
-use std::ops::{Generator, GeneratorState};
-use std::pin::Pin;
-
-#[derive(Copy, Clone)]
-pub struct AccessAction(*mut dyn FnMut());
-
-impl AccessAction {
-    pub fn get(self) -> *mut dyn FnMut() {
-        self.0
-    }
-}
-
-#[derive(Copy, Clone)]
-pub enum Action {
-    Initial,
-    Access(AccessAction),
-    Complete,
-}
-
-pub struct PinnedGenerator<I, A, R> {
-    generator: Pin<Box<dyn Generator<Action, Yield = YieldType<I, A>, Return = R>>>,
-}
-
-impl<I, A, R> PinnedGenerator<I, A, R> {
-    pub fn new<T: Generator<Action, Yield = YieldType<I, A>, Return = R> + 'static>(
-        generator: T,
-    ) -> (I, Self) {
-        let mut result = PinnedGenerator { generator: Box::pin(generator) };
-
-        // Run it to the first yield to set it up
-        let init = match Pin::new(&mut result.generator).resume(Action::Initial) {
-            GeneratorState::Yielded(YieldType::Initial(y)) => y,
-            _ => panic!(),
-        };
-
-        (init, result)
-    }
-
-    pub unsafe fn access(&mut self, closure: *mut dyn FnMut()) {
-        // Call the generator, which in turn will call the closure
-        if let GeneratorState::Complete(_) =
-            Pin::new(&mut self.generator).resume(Action::Access(AccessAction(closure)))
-        {
-            panic!()
-        }
-    }
-
-    pub fn complete(&mut self) -> R {
-        // Tell the generator we want it to complete, consuming it and yielding a result
-        let result = Pin::new(&mut self.generator).resume(Action::Complete);
-        if let GeneratorState::Complete(r) = result { r } else { panic!() }
-    }
-}
-
-#[derive(PartialEq)]
-pub struct Marker<T>(PhantomData<T>);
-
-impl<T> Marker<T> {
-    pub unsafe fn new() -> Self {
-        Marker(PhantomData)
-    }
-}
-
-pub enum YieldType<I, A> {
-    Initial(I),
-    Accessor(Marker<A>),
-}
diff --git a/compiler/rustc_data_structures/src/lib.rs b/compiler/rustc_data_structures/src/lib.rs
index a8b9f479f1e..d55e471810c 100644
--- a/compiler/rustc_data_structures/src/lib.rs
+++ b/compiler/rustc_data_structures/src/lib.rs
@@ -10,7 +10,6 @@
 #![feature(array_windows)]
 #![feature(control_flow_enum)]
 #![feature(in_band_lifetimes)]
-#![feature(generator_trait)]
 #![feature(min_specialization)]
 #![feature(auto_traits)]
 #![feature(nll)]
@@ -63,7 +62,6 @@ macro_rules! unlikely {
 
 pub mod base_n;
 pub mod binary_search_util;
-pub mod box_region;
 pub mod captures;
 pub mod flock;
 pub mod functor;