Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / library / alloc / src / collections / btree / map / tests / ord_chaos.rs

diff --git a/library/alloc/src/collections/btree/map/tests/ord_chaos.rs b/library/alloc/src/collections/btree/map/tests/ord_chaos.rs
deleted file mode 100644 (file)
index 96ce7c1..0000000
--- a/library/alloc/src/collections/btree/map/tests/ord_chaos.rs
+++ /dev/null
@@ -1,81 +0,0 @@
-use std::cell::Cell;
-use std::cmp::Ordering::{self, *};
-use std::ptr;
-
-// Minimal type with an `Ord` implementation violating transitivity.
-#[derive(Debug)]
-pub enum Cyclic3 {
-    A,
-    B,
-    C,
-}
-use Cyclic3::*;
-
-impl PartialOrd for Cyclic3 {
-    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-impl Ord for Cyclic3 {
-    fn cmp(&self, other: &Self) -> Ordering {
-        match (self, other) {
-            (A, A) | (B, B) | (C, C) => Equal,
-            (A, B) | (B, C) | (C, A) => Less,
-            (A, C) | (B, A) | (C, B) => Greater,
-        }
-    }
-}
-
-impl PartialEq for Cyclic3 {
-    fn eq(&self, other: &Self) -> bool {
-        self.cmp(&other) == Equal
-    }
-}
-
-impl Eq for Cyclic3 {}
-
-// Controls the ordering of values wrapped by `Governed`.
-#[derive(Debug)]
-pub struct Governor {
-    flipped: Cell<bool>,
-}
-
-impl Governor {
-    pub fn new() -> Self {
-        Governor { flipped: Cell::new(false) }
-    }
-
-    pub fn flip(&self) {
-        self.flipped.set(!self.flipped.get());
-    }
-}
-
-// Type with an `Ord` implementation that forms a total order at any moment
-// (assuming that `T` respects total order), but can suddenly be made to invert
-// that total order.
-#[derive(Debug)]
-pub struct Governed<'a, T>(pub T, pub &'a Governor);
-
-impl<T: Ord> PartialOrd for Governed<'_, T> {
-    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-impl<T: Ord> Ord for Governed<'_, T> {
-    fn cmp(&self, other: &Self) -> Ordering {
-        assert!(ptr::eq(self.1, other.1));
-        let ord = self.0.cmp(&other.0);
-        if self.1.flipped.get() { ord.reverse() } else { ord }
-    }
-}
-
-impl<T: PartialEq> PartialEq for Governed<'_, T> {
-    fn eq(&self, other: &Self) -> bool {
-        assert!(ptr::eq(self.1, other.1));
-        self.0.eq(&other.0)
-    }
-}
-
-impl<T: Eq> Eq for Governed<'_, T> {}