Set clangd, clang-tidy and cppcheck to c++23 mode

.clang-tidy

@@ -41,22 +41,23 @@ Checks: >
     -misc-no-recursion,
     -misc-non-private-member-variables-in-classes,
     -modernize-use-ranges,
+    -modernize-use-std-print, # replace printout macro with a function when we want to autofix to use std::format gcc >=13
     -performance-enum-size,
     -readability-identifier-length,
     -readability-function-cognitive-complexity,
     -readability-magic-numbers,
 WarningsAsErrors: >
     *,
 FormatStyle: file
-ExtraArgs: [-std=c++20]
+ExtraArgs: [-std=c++23]
 CheckOptions:
     - key: modernize-deprecated-headers.CheckHeaderFile
       value: 'true'
     - key: cppcoreguidelines-init-variables.IncludeStyle
       value: google
     - key: cppcoreguidelines-init-variables.MathHeader
       value: <cmath>
-    - key: modernize-use-std-print.PrintfLikeFunctions # replace printout macro with a function when we want to autofix to use std::format gcc >=13
+    - key: modernize-use-std-print.PrintfLikeFunctions
       value: printf; absl::PrintF; printout
     - key: modernize-use-std-print.FprintfLikeFunctions
       value: fprintf; absl::FPrintF

.clangd

@@ -2,7 +2,7 @@ CompileFlags:
     # to make the compilation database, pip install compiledb, then run:
     # compiledb -n --full-path make TESTMODE=ON
     CompilationDatabase: compile_commands.json
-    Add: [-xc++, -std=c++20, -DTESTMODE=true]
+    Add: [-xc++, -std=c++23, -DTESTMODE=true]
 
 Diagnostics:
     ClangTidy:

.github/workflows/ci-checks.yml

@@ -23,7 +23,7 @@ jobs:
             - name: run cppcheck
               run: |
                   cppcheck --version
-                  cppcheck --force --error-exitcode=1 --language=c++ --std=c++20 --enable=all --inconclusive --suppress=knownConditionTrueFalse --suppress=constParameterCallback --suppress=redundantAssignment --suppress=knownArgument --suppress=missingIncludeSystem --suppress=unusedFunction --check-level=exhaustive .
+                  cppcheck --force --error-exitcode=1 --language=c++ --std=c++23 --enable=all --inconclusive --suppress=knownConditionTrueFalse --suppress=constParameterCallback --suppress=redundantAssignment --suppress=negativeContainerIndex --suppress=missingIncludeSystem --suppress=unusedFunction --check-level=exhaustive .
 
     clang-format:
         runs-on: macos-15