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Problem: With 'regexpengine' set to 1 a case-insensitive match against
a literal string fails when the string starts with a
multi-byte character that is longer than a character following
it, so the two regexp engines disagree (after v9.1.0645).
Solution: In cstrncmp() advance by the length of the character at the
current position instead of always measuring the first
character of "s1" (Volodymyr Chernetskyi).
cstrncmp() walks "s1" to find how many characters make up "*n" bytes, so
that it can measure out the same number of characters in "s2". The loop
decremented the remaining byte count by mb_ptr2len(s1), which always
returns the length of the *first* character, rather than the length of
the character at the current position "p".
When the first character is longer than a later one the byte count runs
out too early, the character count comes up short, and MB_STRNICMP2() is
handed a length for "s2" that is too small, so the comparison fails. For
example matching "\cüber" against "Überraschung": "über" is five bytes,
but each iteration subtracts two (the length of "ü"), so the loop runs
three times instead of four.
:set regexpengine=1
echo matchstr('Überraschung', '\cüber')
returns an empty string, while 'regexpengine' set to 2 correctly returns
"Über". The default value of 0 uses the NFA engine and is unaffected.
related: vim/vim#14756
closes: vim/vim#21212
4e5ac0d68a
Neovim is a project that seeks to aggressively refactor Vim in order to:
- Simplify maintenance and encourage contributions
- Split the work between multiple developers
- Enable advanced UIs without modifications to the core
- Maximize extensibility
See the Introduction wiki page and Roadmap for more information.
Features
- Modern GUIs
- API access from any language including C/C++, C#, Clojure, D, Elixir, Go, Haskell, Java/Kotlin, JavaScript/Node.js, Julia, Lisp, Lua, Perl, Python, Racket, Ruby, Rust
- Embedded, scriptable terminal emulator
- Asynchronous job control
- Shared data (shada) among multiple editor instances
- XDG base directories support
- Compatible with most Vim plugins, including Ruby and Python plugins
See :help nvim-features for the full list, and :help news for noteworthy changes in the latest version!
Install from package
Pre-built packages for Windows, macOS, and Linux are found on the Releases page.
Managed packages are in Homebrew, Debian, Ubuntu, Fedora, Arch Linux, Void Linux, Gentoo, and more!
Install from source
See BUILD.md and supported platforms for details.
The build is CMake-based, but a Makefile is provided as a convenience. After installing the dependencies, run the following command.
make CMAKE_BUILD_TYPE=RelWithDebInfo
sudo make install
To install to a non-default location:
make CMAKE_BUILD_TYPE=RelWithDebInfo CMAKE_INSTALL_PREFIX=/full/path/
make install
CMake hints for inspecting the build:
cmake --build build --target helplists all build targets.build/CMakeCache.txt(orcmake -LAH build/) contains the resolved values of all CMake variables.build/compile_commands.jsonshows the full compiler invocations for each translation unit.
Transitioning from Vim
See :help nvim-from-vim for instructions.
Project layout
├─ cmake/ CMake utils
├─ cmake.config/ CMake defines
├─ cmake.deps/ subproject to fetch and build dependencies (optional)
├─ runtime/ plugins and docs
├─ src/nvim/ application source code (see src/nvim/README.md)
│ ├─ api/ API subsystem
│ ├─ eval/ Vimscript subsystem
│ ├─ event/ event-loop subsystem
│ ├─ generators/ code generation (pre-compilation)
│ ├─ lib/ generic data structures
│ ├─ lua/ Lua subsystem
│ ├─ msgpack_rpc/ RPC subsystem
│ ├─ os/ low-level platform code
│ └─ tui/ built-in UI
└─ test/ tests (see test/README.md)
License
Neovim contributions since b17d96 are licensed under the
Apache 2.0 license, except for contributions copied from Vim (identified by the
vim-patch token). See LICENSE.txt for details.