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bors-servo
83c3ef273b
Test for drains that shift the tail, when inline Previously, the test suite only had one trip through the tail-shifting code in Drain::drop, and that is in the heap state. In the current implementation, a tail-shifting drain while in the inline state produces potentially dangerous aliasing which is currently accepted by default Miri and rejected with -Ztrack-raw-pointers. Adding this test case ensures that if this ever becomes an actual problem it will be easy to find.
rust-smallvec
"Small vector" optimization for Rust: store up to a small number of items on the stack
Example
use smallvec::{SmallVec, smallvec};
// This SmallVec can hold up to 4 items on the stack:
let mut v: SmallVec<[i32; 4]> = smallvec![1, 2, 3, 4];
// It will automatically move its contents to the heap if
// contains more than four items:
v.push(5);
// SmallVec points to a slice, so you can use normal slice
// indexing and other methods to access its contents:
v[0] = v[1] + v[2];
v.sort();