Luabridge3

.github/workflows/meson.yml

@@ -80,7 +80,7 @@ jobs:
       - name: Install Dependencies
         run: |
           sudo apt-get update -yq
-          sudo apt-get install --no-install-recommends wget liballegro4-dev libloadpng4-dev libflac++-dev luajit-5.1-dev liblua5.2-dev libminizip-dev liblz4-dev libpng++-dev libx11-dev libboost-dev libtbb-dev libsdl2-dev libsdl2-image-dev libopengl-dev libfuse2 ninja-build ccache
+          sudo apt-get install --no-install-recommends wget liballegro4-dev libloadpng4-dev libflac++-dev luajit-5.1-dev liblua5.2-dev libminizip-dev liblz4-dev libpng++-dev libx11-dev libtbb-dev libsdl2-dev libsdl2-image-dev libopengl-dev libfuse2 ninja-build ccache
           sudo pip install meson
 
       - name: ccache

CHANGELOG.md

@@ -249,6 +249,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - Numbers saved with `Activity:SaveNumber()` are now kept as doubles instead of floats, and floating point numbers in INI and save files are written out exactly instead of being rounded to 6 digits.
 
+- The Lua bindings now use LuaBridge3 instead of luabind, and the copy of boost that luabind needed is gone. Calls from Lua into the game are faster, especially method calls and property access on objects like `Actor`s. Scripts run around 30% to 45% faster.  
+	Scripts don't need any changes. Everything that worked with luabind works the same, including setting values of their own on objects, overloads, inherited enums, setting things like `actor.Pos.X` in place, and passing numbers with fractions to whole number parameters.  
+	A few things that used to raise an error now don't: functions added to a class from Lua (like `function MovableObject:Foo() end`) are also found on objects of derived classes, comparing two references to the same object with `==` gives `false`, reading something that doesn't exist from a class table gives `nil`, and functions that aren't overloaded convert their arguments the way Lua does (numbers to strings, any value to a boolean, missing arguments to `nil`) and ignore extra ones. Class tables like `Vector` are now tables instead of userdata. Error messages for calls with the wrong arguments are worded differently.
+
 </details>
 
 <details><summary><b>Fixed</b></summary>

Licences/LICENSE.LuaBridge3.txt

@@ -0,0 +1,27 @@
+LuaBridge3 is published under the terms of the MIT License
+
+    http://www.opensource.org/licenses/mit-license.html
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*   Copyright 2020, kunitoki
+*   Copyright 2019, Dmitry Tarakanov
+*   Copyright 2012, Vinnie Falco
+*   Copyright 2008, Nigel Atkinson
+*   Copyright 2007, Nathan Reed

README.md

@@ -66,7 +66,7 @@ This has been tested with WSL2 Ubuntu 22.04 but should work with other distribut
 
 # Linux and macOS Build Instructions
 The Linux build uses the meson build system, and builds against system libraries.
-LuaJIT and luabind are the exception: they're always built from the copies in `external/sources`, including when cross compiling, because the game relies on changes made to them (such as LuaJIT's deterministic table ordering). So a system `luajit` isn't needed.
+LuaJIT is the exception: it's always built from the copy in `external/sources`, including when cross compiling, because the game relies on changes made to it (such as its deterministic table ordering). So a system `luajit` isn't needed.
 
 ## Dependencies
 
@@ -125,7 +125,7 @@ If you want to change the buildtype afterwards, you can use `meson configure --b
 `sudo python3 -m pip install meson`
 
 **Fedora:**  
-`# dnf install allegro-loadpng-devel allegro-devel libsdl2-devel SDL2_image-devel lua-devel boost-devel meson ninja-build flac-devel minizip-compat-devel tbb-devel lz4-devel libpng-devel lua-devel gcc gcc-c++`  
+`# dnf install allegro-loadpng-devel allegro-devel libsdl2-devel SDL2_image-devel lua-devel meson ninja-build flac-devel minizip-compat-devel tbb-devel lz4-devel libpng-devel lua-devel gcc gcc-c++`  
 
 ## Troubleshooting