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Stabilize const BTree{Map,Set}::new

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Since `len` and `is_empty` are not const stable yet, this also
creates a new feature for them since they previously used the same
`const_btree_new` feature.
This commit is contained in:
Nilstrieb 2022-09-23 18:03:44 +02:00
parent 2063b8f137
commit 334f4535bd
1 changed files with 3 additions and 3 deletions
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6
tests/ui/crashes/ice-7126.rs
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@ -1,13 +1,13 @@
// This test requires a feature gated const fn and will stop working in the future. // This test requires a feature gated const fn and will stop working in the future.
#![feature(const_btree_new)] #![feature(const_btree_len)]
use std::collections::BTreeMap; use std::collections::BTreeMap;
struct Foo(BTreeMap<i32, i32>); struct Foo(usize);
impl Foo { impl Foo {
fn new() -> Self { fn new() -> Self {
Self(BTreeMap::new()) Self(BTreeMap::len(&BTreeMap::<u8, u8>::new()))
} }
} }