binary-heap-plus2

This is a fork of binary-heap-plus, add a new generic constructor BinaryHeap::from_vec_cmp_rebuild().

Enhancement over Rust's std::collections::BinaryHeap.

It supports the following heaps and still maintains backward compatibility.

• Max heap
  • Use BinaryHeap::new() or ::with_capacity()
• Min heap
  • Use BinaryHeap::new_min() or ::with_capacity_min()
• Heap ordered by closure
  • Use BinaryHeap::new_by() or ::with_capacity_by()
• Heap ordered by key generated by closure
  • Use BinaryHeap::new_by_key() or ::with_capacity_by_key()

Other notable added methods are:

• BinaryHeap::from_vec_cmp(), BinaryHeap::from_vec() and BinaryHeap::from_vec_cmp_rebuild() for more generic construction.
• .into_iter_sorted() which is less-surprising version of .into_iter(). The implementation is backported from std.

MSRV (Minimum Supported Rust Version)

This crate requires Rust 1.31.1 or later.

Changes

See CHANGELOG.md. https://github.com/sekineh/binary-heap-plus-rs/blob/master/CHANGELOG.md

Thanks

• I received many valuable feedback from Pre-RFC thread [1].
  • The current design is based on @ExpHP's suggestion that compiles on stable compiler.
  • DDOtten, steven099, CAD97, ExpHP, scottmcm, Nemo157 and gnzlbg, thanks for looking into the design!
• @ulysseB sent me a first pull request!
• @inesseq contributed feature serde1.

References

See the following discussions for the background of the crate:

• [1] https://internals.rust-lang.org/t/pre-rfc-binaryheap-flexibility/7482
• https://users.rust-lang.org/t/binaryheap-flexibility-revisited-supporting-other-than-max-heap/17062
• https://users.rust-lang.org/t/binaryheap-flexibility/8766
• https://github.com/rust-lang/rust/issues/38886