Update to C++23

README.md

@@ -9,7 +9,7 @@
 
 Verovio is a fast, portable and lightweight library for engraving [Music Encoding Initiative (MEI)](http://www.music-encoding.org) digital scores into SVG images. Verovio also contains on-the-fly converters to render [Plaine & Easie Code](https://www.iaml.info/plaine-easie-code), [Humdrum](https://www.humdrum.org), [Musedata](https://musedata.org), [MusicXML](https://www.musicxml.com), [EsAC](http://esac-data.org), and [ABC](https://en.wikipedia.org/wiki/ABC_notation) digital scores. 
 
-Verovio is written in standard 2020 C++ and can be compiled as a standalone command-line tool, used as a compiled music-rendering library for applications (Qt, python), or compiled into Javascript using the Emscripten LLVM-to-JavaScript compiler.  Check out the JavaScript toolkit version of verovio running in the [MEI Viewer](http://www.verovio.org/mei-viewer.xhtml) as well as the [app](http://www.verovio.org/app.html) or [tutorials](https://book.verovio.org/first-steps/) for web integration and user interaction.
+Verovio is written in standard 2023 C++ and can be compiled as a standalone command-line tool, used as a compiled music-rendering library for applications (Qt, python), or compiled into Javascript using the Emscripten LLVM-to-JavaScript compiler.  Check out the JavaScript toolkit version of verovio running in the [MEI Viewer](http://www.verovio.org/mei-viewer.xhtml) as well as the [app](http://www.verovio.org/app.html) or [tutorials](https://book.verovio.org/first-steps/) for web integration and user interaction.
 
 ![Choice interaction](https://raw.githubusercontent.com/rism-digital/verovio.org/gh-pages/movies/reflow.gif)
 

cmake/CMakeLists.txt

@@ -48,7 +48,7 @@ if(MSVC)
     add_definitions(/wd4244)          # suppress warning of possible loss of precision
     add_definitions(-DNO_PAE_SUPPORT) # regex is working differently under Windows so PAE is not supported (yet)
     add_definitions(-DUSE_PAE_OLD_PARSER)
-    add_definitions(/std:c++20)
+    add_definitions(/std:c++23)
     include_directories(../include/win32)
 else()
     if(CMAKE_BUILD_TYPE MATCHES Debug)
@@ -64,7 +64,7 @@ else()
     # jsonxx raises -Wdollar-in-identifier-extension
     # gcc 8.3.1 does not like -Wdollar-in-identifier-extension option.
     add_definitions(-Wall -W -pedantic -Wno-unused-parameter -Wno-dollar-in-identifier-extension)
-    add_definitions(-std=c++20)
+    add_definitions(-std=c++23)
 
     # extra warnings similar to Xcode compiling settings (most probably covered by -Wall):
     # https://github.com/llvm-mirror/clang/blob/master/include/clang/Basic/DiagnosticGroups.td

setup.py

@@ -83,10 +83,10 @@ def get_version() -> str:
 # extra compile arguments
 EXTRA_COMPILE_ARGS = ['-DPYTHON_BINDING']
 if platform.system() != 'Windows':
-    EXTRA_COMPILE_ARGS += ['-std=c++20',
+    EXTRA_COMPILE_ARGS += ['-std=c++23',
                            '-Wno-write-strings', '-Wno-overloaded-virtual', '-g0']
 else:
-    EXTRA_COMPILE_ARGS += ['/std:c++20',
+    EXTRA_COMPILE_ARGS += ['/std:c++23',
                            '-DNO_PAE_SUPPORT']
 
 verovio_module = Extension('verovio._verovio',