Revert "Impl get_size::GetSize (behind feature flag)"

This reverts commit 38863e8.

Avoids a cyclic dependency when the build includes the
`get-size/derive` feature.

Cargo.toml

@@ -28,7 +28,6 @@ debugger_visualizer = []
 [dependencies]
 serde = { version = "1", optional = true, default-features = false }
 arbitrary = { version = "1", optional = true }
-get-size = { version = "0.1", optional = true, default-features = false }
 
 [dev_dependencies]
 bincode = "1.0.1"

src/lib.rs

@@ -88,10 +88,6 @@
 //! [Rustonomicon](https://doc.rust-lang.org/1.42.0/nomicon/dropck.html#an-escape-hatch).
 //!
 //! Tracking issue: [rust-lang/rust#34761](https://github.com/rust-lang/rust/issues/34761)
-//!
-//! ### `get-size`
-//!
-//! When this optional dependency is enabled, `SmallVec` implements the `get_size::GetSize` trait.
 
 #![no_std]
 #![cfg_attr(docsrs, feature(doc_cfg))]
@@ -145,9 +141,6 @@ use std::io;
 #[cfg(feature = "drain_keep_rest")]
 use core::mem::ManuallyDrop;
 
-#[cfg(feature = "get-size")]
-use get_size::GetSize;
-
 /// Creates a [`SmallVec`] containing the arguments.
 ///
 /// `smallvec!` allows `SmallVec`s to be defined with the same syntax as array expressions.
@@ -2476,22 +2469,3 @@ impl<T> Clone for ConstNonNull<T> {
 }
 
 impl<T> Copy for ConstNonNull<T> {}
-
-#[cfg(feature = "get-size")]
-impl<A: Array> GetSize for SmallVec<A>
-where
-    A::Item: GetSize,
-{
-    fn get_heap_size(&self) -> usize {
-        let mut total = 0;
-        if self.spilled() {
-            total += self.capacity * A::Item::get_stack_size();
-        }
-
-        for v in self.iter() {
-            total += v.get_heap_size();
-        }
-
-        total
-    }
-}

src/tests.rs

@@ -1023,70 +1023,3 @@ fn drain_keep_rest() {
 
     assert_eq!(a, SmallVec::<[i32; 3]>::from_slice(&[1i32, 3, 5, 6, 7, 8]));
 }
-
-#[cfg(all(feature = "get-size", target_pointer_width = "64"))]
-mod get_size {
-    use super::*;
-
-    #[test]
-    fn end_to_end1() {
-        use ::get_size::GetSize;
-
-        let mut a: SmallVec<[i32; 2]> = smallvec![];
-        assert!(!a.spilled());
-        assert_eq!(a.len(), 0);
-        assert_eq!(a.get_size(), 24);
-        assert_eq!(a.get_heap_size(), 0);
-
-        a.push(0);
-        assert_eq!(a.len(), 1);
-        assert!(!a.spilled());
-        assert_eq!(a.get_size(), 24);
-        assert_eq!(a.get_heap_size(), 0);
-
-        a.push(1);
-        assert_eq!(a.len(), 2);
-        assert!(!a.spilled());
-        assert_eq!(a.get_size(), 24);
-        assert_eq!(a.get_heap_size(), 0);
-
-        a.push(2);
-        assert_eq!(a.len(), 3);
-        assert!(a.spilled());
-        assert_eq!(a.get_size(), 40);
-        assert_eq!(a.get_heap_size(), 16);
-
-        a.push(3);
-        assert_eq!(a.len(), 4);
-        assert!(a.spilled());
-        assert_eq!(a.get_size(), 40);
-        assert_eq!(a.get_heap_size(), 16);
-
-        a.push(4);
-        assert_eq!(a.len(), 5);
-        assert!(a.spilled());
-        assert_eq!(a.get_size(), 56);
-        assert_eq!(a.get_heap_size(), 32);
-
-    }
-
-    #[cfg(not(feature = "union"))]
-    #[test]
-    fn stack_size_no_union1() {
-        use ::get_size::GetSize;
-
-        assert_eq!(SmallVec::<[i32; 2]>::get_stack_size(), 24);
-        assert_eq!(SmallVec::<[i32; 10]>::get_stack_size(), 56);
-    }
-
-    #[cfg(feature="union")]
-    #[test]
-    fn stack_size_union1() {
-        use ::get_size::GetSize;
-
-        assert_eq!(SmallVec::<[i32; 2]>::get_stack_size(), 24);
-        assert_eq!(SmallVec::<[i32; 10]>::get_stack_size(), 48);
-    }
-
-}
-