Merge branch 'main' into feature/finish-my-contribution

Author: dietmarkuehl

.github/workflows/ci_tests.yml

@@ -46,14 +46,14 @@ jobs:
                     }
                   ]
                 },
-                { "cxxversions": ["c++23", "c++20"],
+                { "cxxversions": ["c++23"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
             },
             { "versions": ["14", "13"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20"],
+                { "cxxversions": ["c++26", "c++23"],
                   "tests": [{ "stdlibs": ["libstdc++"], "tests": ["Release.Default"]}]
                 }
               ]
@@ -72,7 +72,7 @@ jobs:
                     }
                   ]
                 },
-                { "cxxversions": ["c++23", "c++20"],
+                { "cxxversions": ["c++23"],
                   "tests": [
                     {"stdlibs": ["libstdc++", "libc++"], "tests": ["Release.Default"]}
                   ]
@@ -81,7 +81,7 @@ jobs:
             },
             { "versions": ["19"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20"],
+                { "cxxversions": ["c++26", "c++23"],
                   "tests": [
                     {"stdlibs": ["libstdc++", "libc++"], "tests": ["Release.Default"]}
                   ]
@@ -90,7 +90,7 @@ jobs:
             },
             { "versions": ["18", "17"],
               "tests": [
-                { "cxxversions": ["c++26", "c++23", "c++20"],
+                { "cxxversions": ["c++26", "c++23"],
                   "tests": [{"stdlibs": ["libc++"], "tests": ["Release.Default"]}]
                 }
               ]

CMakePresets.json

@@ -7,7 +7,7 @@
       "generator": "Ninja",
       "binaryDir": "${sourceDir}/build/${presetName}",
       "cacheVariables": {
-        "CMAKE_CXX_STANDARD": "20",
+        "CMAKE_CXX_STANDARD": "23",
         "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
         "CMAKE_PROJECT_TOP_LEVEL_INCLUDES": "./infra/cmake/use-fetch-content.cmake"
       }