rollup: bump MSRV to Rust 1.65, bug fixes, memory usage reductions, API improvements, more word boundary assertions and more

.github/workflows/ci.yml

@@ -141,7 +141,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@master
       with:
-        toolchain: 1.60.0
+        toolchain: 1.65.0
     # The memchr 2.6 release purportedly bumped its MSRV to Rust 1.60, but it
     # turned out that on aarch64, it was using something that wasn't stabilized
     # until Rust 1.61[1]. (This was an oversight on my part. I had previously

CHANGELOG.md

@@ -1,3 +1,81 @@
+1.10.0 (2023-10-09)
+===================
+This is a new minor release of `regex` that adds support for start and end
+word boundary assertions. That is, `\<` and `\>`. The minimum supported Rust
+version has also been raised to 1.65, which was released about one year ago.
+
+The new word boundary assertions are:
+
+* `\<` or `\b{start}`: a Unicode start-of-word boundary (`\W|\A` on the left,
+`\w` on the right).
+* `\>` or `\b{end}`: a Unicode end-of-word boundary (`\w` on the left, `\W|\z`
+on the right)).
+* `\b{start-half}`: half of a Unicode start-of-word boundary (`\W|\A` on the
+left).
+* `\b{end-half}`: half of a Unicode end-of-word boundary (`\W|\z` on the
+right).
+
+The `\<` and `\>` are GNU extensions to POSIX regexes. They have been added
+to the `regex` crate because they enjoy somewhat broad support in other regex
+engines as well (for example, vim). The `\b{start}` and `\b{end}` assertions
+are aliases for `\<` and `\>`, respectively.
+
+The `\b{start-half}` and `\b{end-half}` assertions are not found in any
+other regex engine (although regex engines with general look-around support
+can certainly express them). They were added principally to support the
+implementation of word matching in grep programs, where one generally wants to
+be a bit more flexible in what is considered a word boundary.
+
+New features:
+
+* [FEATURE #469](https://github.com/rust-lang/regex/issues/469):
+Add support for `\<` and `\>` word boundary assertions.
+* [FEATURE(regex-automata) #1031](https://github.com/rust-lang/regex/pull/1031):
+DFAs now have a `start_state` method that doesn't use an `Input`.
+
+Performance improvements:
+
+* [PERF #1051](https://github.com/rust-lang/regex/pull/1051):
+Unicode character class operations have been optimized in `regex-syntax`.
+* [PERF #1090](https://github.com/rust-lang/regex/issues/1090):
+Make patterns containing lots of literal characters use less memory.
+
+Bug fixes:
+
+* [BUG #1046](https://github.com/rust-lang/regex/issues/1046):
+Fix a bug that could result in incorrect match spans when using a Unicode word
+boundary and searching non-ASCII strings.
+* [BUG(regex-syntax) #1047](https://github.com/rust-lang/regex/issues/1047):
+Fix panics that can occur in `Ast->Hir` translation (not reachable from `regex`
+crate).
+* [BUG(regex-syntax) #1088](https://github.com/rust-lang/regex/issues/1088):
+Remove guarantees in the API that connect the `u` flag with a specific HIR
+representation.
+
+`regex-automata` breaking change release:
+
+This release includes a `regex-automata 0.4.0` breaking change release, which
+was necessary in order to support the new word boundary assertions. For
+example, the `Look` enum has new variants and the `LookSet` type now uses `u32`
+instead of `u16` to represent a bitset of look-around assertions. These are
+overall very minor changes, and most users of `regex-automata` should be able
+to move to `0.4` from `0.3` without any changes at all.
+
+`regex-syntax` breaking change release:
+
+This release also includes a `regex-syntax 0.8.0` breaking change release,
+which, like `regex-automata`, was necessary in order to support the new word
+boundary assertions. This release also includes some changes to the `Ast`
+type to reduce heap usage in some cases. If you are using the `Ast` type
+directly, your code may require some minor modifications. Otherwise, users of
+`regex-syntax 0.7` should be able to migrate to `0.8` without any code changes.
+
+`regex-lite` release:
+
+The `regex-lite 0.1.1` release contains support for the new word boundary
+assertions. There are no breaking changes.
+
+
 1.9.6 (2023-09-30)
 ==================
 This is a patch release that fixes a panic that can occur when the default

Cargo.toml

@@ -15,7 +15,7 @@ categories = ["text-processing"]
 autotests = false
 exclude = ["/scripts/*", "/.github/*"]
 edition = "2021"
-rust-version = "1.60.0"
+rust-version = "1.65"
 
 [workspace]
 members = [