Add VecDeque::resize_with #56016
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Add VecDeque::resize_with #56016
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pietroalbini
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Nov 18, 2018
…shtriplett Add VecDeque::resize_with This already exists on `Vec`; I'm just adding it to `VecDeque`. I wanted to resize a `VecDeque<Vec<T>>` when I didn't know `T: Clone`, so I couldn't use `.resize(n, Vec::new())`. With this I could do `.resize_with(n, Vec::new)` instead, which doesn't need `T: Clone`. Tracking issue: rust-lang#41758
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Rollup of 25 pull requests Successful merges: - #55562 (Add powerpc- and powerpc64-unknown-linux-musl targets) - #55564 (test/linkage-visibility: Ignore on musl targets) - #55827 (A few tweaks to iterations/collecting) - #55834 (Forward the ABI of the non-zero sized fields of an union if they have the same ABI) - #55857 (remove unused dependency) - #55862 (in which the E0618 "expected function" diagnostic gets a makeover) - #55867 (do not panic just because cargo failed) - #55894 (miri enum discriminant handling: Fix treatment of pointers, better error when it is undef) - #55916 (Make miri value visitor usfeful for mutation) - #55919 (core/tests/num: Simplify `test_int_from_str_overflow()` test code) - #55923 (reword #[test] attribute error on fn items) - #55935 (appveyor: Use VS2017 for all our images) - #55949 (ty: return impl Iterator from Predicate::walk_tys) - #55952 (Update to Clang 7 on CI.) - #55953 (#53488 Refactoring UpvarId) - #55962 (rustdoc: properly calculate spans for intra-doc link resolution errors) - #55963 (Stress test for MPSC) - #55968 (Clean up some non-mod-rs stuff.) - #55970 (Miri backtrace improvements) - #56007 (CTFE: dynamically make sure we do not call non-const-fn) - #56011 (Replace data.clone() by Arc::clone(&data) in mutex doc.) - #56012 (avoid shared ref in UnsafeCell::get) - #56016 (Add VecDeque::resize_with) - #56027 (docs: Add missing backtick in object_safety.rs docs) - #56043 (remove "approx env bounds" if we already know from trait) Failed merges: r? @ghost
Centril
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| /// assert_eq!(buf, [5, 10, 101, 102, 103]); | ||
| /// ``` | ||
| #[unstable(feature = "vec_resize_with", issue = "41758")] | ||
| pub fn resize_with(&mut self, new_len: usize, generator: impl FnMut()->T) { |
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| pub fn resize_with(&mut self, new_len: usize, generator: impl FnMut()->T) { | |
| pub fn resize_with(&mut self, new_len: usize, generator: impl FnMut() -> T) { |
Also, we generally don't use arg: impl Trait in the standard library so I think this should be a type param instead.
kennytm
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…shtriplett Add VecDeque::resize_with This already exists on `Vec`; I'm just adding it to `VecDeque`. I wanted to resize a `VecDeque<Vec<T>>` when I didn't know `T: Clone`, so I couldn't use `.resize(n, Vec::new())`. With this I could do `.resize_with(n, Vec::new)` instead, which doesn't need `T: Clone`. Tracking issue: rust-lang#41758
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Rollup of 25 pull requests Successful merges: - #55562 (Add powerpc- and powerpc64-unknown-linux-musl targets) - #55564 (test/linkage-visibility: Ignore on musl targets) - #55827 (A few tweaks to iterations/collecting) - #55834 (Forward the ABI of the non-zero sized fields of an union if they have the same ABI) - #55857 (remove unused dependency) - #55862 (in which the E0618 "expected function" diagnostic gets a makeover) - #55867 (do not panic just because cargo failed) - #55894 (miri enum discriminant handling: Fix treatment of pointers, better error when it is undef) - #55916 (Make miri value visitor useful for mutation) - #55919 (core/tests/num: Simplify `test_int_from_str_overflow()` test code) - #55923 (reword #[test] attribute error on fn items) - #55949 (ty: return impl Iterator from Predicate::walk_tys) - #55952 (Update to Clang 7 on CI.) - #55953 (#53488 Refactoring UpvarId) - #55962 (rustdoc: properly calculate spans for intra-doc link resolution errors) - #55963 (Stress test for MPSC) - #55968 (Clean up some non-mod-rs stuff.) - #55970 (Miri backtrace improvements) - #56007 (CTFE: dynamically make sure we do not call non-const-fn) - #56011 (Replace data.clone() by Arc::clone(&data) in mutex doc.) - #56012 (avoid shared ref in UnsafeCell::get) - #56016 (Add VecDeque::resize_with) - #56027 (docs: Add missing backtick in object_safety.rs docs) - #56043 (remove "approx env bounds" if we already know from trait) - #56059 (Increase `Duration` approximate equal threshold to 1us)
Centril
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Dec 1, 2018
…olnay Move VecDeque::resize_with out of the impl<T:Clone> block I put this in the wrong `impl` block in rust-lang#56016, so fixing. Tracking issue for the unstable method: rust-lang#41758 (comment)
Centril
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…olnay Move VecDeque::resize_with out of the impl<T:Clone> block I put this in the wrong `impl` block in rust-lang#56016, so fixing. Tracking issue for the unstable method: rust-lang#41758 (comment)
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…olnay Move VecDeque::resize_with out of the impl<T:Clone> block I put this in the wrong `impl` block in rust-lang#56016, so fixing. Tracking issue for the unstable method: rust-lang#41758 (comment)
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This already exists on
Vec; I'm just adding it toVecDeque.I wanted to resize a
VecDeque<Vec<T>>when I didn't knowT: Clone, so I couldn't use.resize(n, Vec::new()). With this I could do.resize_with(n, Vec::new)instead, which doesn't needT: Clone.Tracking issue: #41758