Update Compilers and default to C++20

.github/workflows/build.yml

@@ -9,17 +9,23 @@ on:
 
 jobs:
   ubuntu-gcc-build:
-    name: ubuntu-${{ matrix.compiler }}-cpp${{ matrix.cppVersion }}-build
-    runs-on: ubuntu-latest
+    name: ${{ matrix.os }}-${{ matrix.compiler }}-cpp${{ matrix.cppVersion }}-build
+    runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        compiler: [gcc-12, gcc-14]
-        cppVersion: [17, 20]
+        compiler: [gcc-12, gcc-13, gcc-15]
+        cppVersion: [20, 23]
         include:
           - compiler: gcc-12
             cxx: g++-12
-          - compiler: gcc-14
-            cxx: g++-14
+            os: ubuntu-24.04
+          - compiler: gcc-13
+            cxx: g++-13
+            os: ubuntu-latest
+          - compiler: gcc-15
+            cxx: g++-15
+            os: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v6
@@ -65,17 +71,27 @@ jobs:
           key: ubuntu-${{ matrix.compiler }}-for_run-${{ github.sha }}-cpp-${{ matrix.cppVersion }}
 
   ubuntu-clang-build:
-    name: ubuntu-build-${{ matrix.compiler }}-C++${{ matrix.cppVersion }}
-    runs-on: ubuntu-latest
+    name: ${{ matrix.os }}-${{ matrix.compiler }}-C++${{ matrix.cppVersion }}-build
+    runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        cppVersion: [17, 20]
-        compiler: [clang++-16, clang++-18]
+        cppVersion: [20, 23]
+        compiler: [clang++-16, clang++-20, clang++-22]
+        exclude:
+          # Clang 16 is not happy with c++23
+          - compiler: clang++-16
+            cppVersion: 23
         include:
           - compiler: clang++-16
             enable_file_prefix_map: true
-          - compiler: clang++-18
+            os: ubuntu-24.04
+          - compiler: clang++-20
+            enable_file_prefix_map: true
+            os: ubuntu-latest
+          - compiler: clang++-22
             enable_file_prefix_map: true
+            os: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v6

.github/workflows/generate_files.yml

@@ -16,7 +16,7 @@ jobs:
             ActionPriorityLists
             profiles
             .git
-          key: ubuntu-clang++-16-for_run-${{ github.sha }}-cpp-17
+          key: ubuntu-clang++-20-for_run-${{ github.sha }}-cpp-20
 
       - uses: actions/checkout@v6
 

.github/workflows/main.yml

@@ -202,7 +202,7 @@ jobs:
     if: github.base_ref == github.event.repository.default_branch || github.ref_name == github.event.repository.default_branch
     uses: ./.github/workflows/spec_test.yml
     with:
-      cache-key: ubuntu-clang++-16-for_run-${{ github.sha }}-cpp-17
+      cache-key: ubuntu-clang++-20-for_run-${{ github.sha }}-cpp-20
       is-ptr: false
       spec-matrix: ${{ needs.spec-test-selection.outputs.spec-matrix }}
 
@@ -211,7 +211,7 @@ jobs:
     if: github.base_ref == github.event.repository.default_branch || github.ref_name == github.event.repository.default_branch
     uses: ./.github/workflows/spec_test.yml
     with:
-      cache-key: ubuntu-clang++-16-for_run-${{ github.sha }}-cpp-17
+      cache-key: ubuntu-clang++-20-for_run-${{ github.sha }}-cpp-20
       is-ptr: true
       spec-matrix: ${{ needs.spec-test-selection.outputs.spec-matrix }}
 

.github/workflows/ubuntu_test.yml

@@ -9,17 +9,28 @@ env:
 
 jobs:
   ubuntu-test:
-    name: ubuntu-${{ matrix.compiler }}-cpp-${{ matrix.cppVersion }}-${{ matrix.type }}
-    runs-on: ubuntu-latest
+    name: ${{ matrix.os }}-${{ matrix.compiler }}-cpp-${{ matrix.cppVersion }}-${{ matrix.type }}
+    runs-on: ${{ matrix.os }}
     env:
       CACHE_KEY: ubuntu-${{ matrix.compiler }}-for_run-${{ github.sha }}-cpp-${{ matrix.cppVersion }}
       UBSAN_OPTIONS: print_stacktrace=1
 
     strategy:
       fail-fast: false
       matrix:
-        cppVersion: [17, 20]
-        compiler: [clang++-16, clang++-18, gcc-12, gcc-14]
+        cppVersion: [20, 23]
+        compiler: [clang++-16, clang++-20, clang++-22, gcc-12, gcc-13, gcc-15]
+        exclude:
+          # clang 16 is not happy with c++23
+          - compiler: clang++-16
+            cppVersion: 23
+        include:
+          - { compiler: clang++-16, os: ubuntu-24.04 }
+          - { compiler: gcc-12,     os: ubuntu-24.04 }
+          - { compiler: clang++-20, os: ubuntu-latest }
+          - { compiler: clang++-22, os: ubuntu-latest }
+          - { compiler: gcc-13,     os: ubuntu-latest }
+          - { compiler: gcc-15,     os: ubuntu-latest }
 
     steps:
       - uses: actions/cache@v5
@@ -41,7 +52,7 @@ jobs:
         run: ${{ runner.workspace }}/b/ninja/simc $SIMC_ARGS $SIMC_PROFILE iterations=10 fight_style=DungeonSlice allow_experimental_specializations=1 cleanup_threads=1
 
       - name: Clear Cache
-        if: ( matrix.compiler != 'clang++-16' || matrix.cppVersion != '17' ) && github.event_name == 'push'
+        if: ( matrix.compiler != 'clang++-20' || matrix.cppVersion != '20' ) && github.event_name == 'push'
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: gh cache delete ${{ env.CACHE_KEY }}

CMakeLists.txt

@@ -1,5 +1,5 @@
 # Projects Settings
-cmake_minimum_required (VERSION 3.10...3.22)
+cmake_minimum_required (VERSION 3.12...3.22)
 
 # Set OSX minimum version parity with Qt project
 set(CMAKE_OSX_DEPLOYMENT_TARGET 10.15)
@@ -18,7 +18,7 @@ option(SC_USE_FLAT_INSTALL "Install files into a flat folder structure" ${WIN32}
 
 option(SC_EVENT_QUEUE_DEBUG "Enable Event Queue Debug Info" OFF)
 
-set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
+set(CMAKE_CXX_STANDARD 20 CACHE STRING "C++ standard to conform to")
 set(CMAKE_CXX_STANDARD_REQUIRED YES)
 set(CMAKE_CXX_EXTENSIONS OFF)
 

engine/Makefile

@@ -57,7 +57,7 @@ endif
 
 MKDIR      = mkdir
 CXX        = c++
-CPP_FLAGS  = -Wall -Wextra -W -I. -I./include -I./lib -DSC_SHARED_DATA=\"$(SHARED_DATA)\" --std=c++17 -O3 -MMD -MP \
+CPP_FLAGS  = -Wall -Wextra -W -I. -I./include -I./lib -DSC_SHARED_DATA=\"$(SHARED_DATA)\" --std=c++20 -O3 -MMD -MP \
 -Wpedantic \
 -Wcast-qual \
 -Wconversion-null
@@ -109,8 +109,8 @@ endif
 ifneq (${NO_DEBUG},)
   CPP_FLAGS += -DNDEBUG
 endif
-ifneq (${C++20},)
-  CPP_FLAGS += --std=c++20
+ifneq (${C++23},)
+  CPP_FLAGS += --std=c++23
 endif
 ifneq (${LTO},)
   OPTS_INTERNAL += -flto
@@ -290,19 +290,19 @@ clean: mostlyclean
 # Unit Tests
 sc_http$(MODULE_EXT): interfaces$(PATHSEP)sc_http.cpp util$(PATHSEP)sc_io.cpp sc_thread.cpp sc_util.cpp
 	-@echo [$@] Linking
-	$(CXX) $(CPP_FLAGS) -std=c++0x -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
+	$(CXX) $(CPP_FLAGS) -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
 
 rng$(MODULE_EXT): util$(PATHSEP)rng.cpp lib$(PATHSEP)fmt$(PATHSEP)format.cpp util$(PATHSEP)chrono.cpp
 	-@echo [$@] Linking
 	$(CXX) $(CPP_FLAGS) -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
 
 timeline$(MODULE_EXT): util$(PATHSEP)timeline.hpp util$(PATHSEP)timeline.cpp
 	-@echo [$@] Linking
-	$(CXX) $(CPP_FLAGS) -std=c++0x -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
+	$(CXX) $(CPP_FLAGS) -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
 
 sample_data$(MODULE_EXT): util$(PATHSEP)sample_data.hpp util$(PATHSEP)sample_data.cpp
 	-@echo [$@] Linking
-	$(CXX) $(CPP_FLAGS) -std=c++0x -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
+	$(CXX) $(CPP_FLAGS) -DUNIT_TEST $(OPTS_INTERNAL) $(OPTS) $(LINK_FLAGS) $^ -o $@ $(LINK_LIBS)
 
 sc_expressions$(MODULE_EXT): sim$(PATHSEP)sc_expressions.cpp sc_util.cpp
 	-@echo [$@] Linking

engine/config.hpp

@@ -59,28 +59,17 @@
 // Compiler Minimal Limits
 // ==========================================================================
 
-
-// Last updated 2023-09: Support gcc7 / clang 5 / MSVS 19.14 which have (~full) C++17 support
-// Ubuntu LTS EOL is +5 years, Debian has ~+3year EOL, +5 years with separate LTS support
-// Debian 10 (Buster) (Release 2019-07): gcc 8.3 clang 7
-// Ubuntu 20.04: gcc 9.3 clang 10
-// Debian 11 (Bullseye) (Release 2021-08): gcc 10.2 clang 11
-// Ubuntu 22.04: gcc 11.2 clang 14
-// Debian 12 (Bookworm) (Release 2023-06): gcc 12.2 clang 14
-//
-// CI setup currently only supports Ubuntu 20.04+, which has clang 7 as the lowest installable version -
-// so clang 5/6 builds are not actually tested in CI.
-#if defined( SC_CLANG ) && SC_CLANG < 50000
-#  error "clang++ below version 5 not supported"
+// Last updated 2026-10: Support gcc10 / clang 14 / MSVS 16.10 (MSVC 19.29) which have (~full) C++20 support
+#if defined( SC_CLANG ) && SC_CLANG < 140000
+#  error "clang++ below version 14 not supported"
 #endif
-#if defined( SC_GCC ) && SC_GCC < 70000
-#  error "g++ below version 7 not supported"
+#if defined( SC_GCC ) && SC_GCC < 100000
+#  error "g++ below version 10 not supported"
 #endif
-#if defined( SC_VS ) && SC_VS < 1914
-#  error "Visual Studio 2017 below version 15.7 not supported"
+#if defined( SC_VS ) && SC_VS < 1929
+#  error "Visual Studio 2019 below version 16.10 not supported"
 #endif
 
-
 // ==========================================================================
 // General Macros/Defines
 // ==========================================================================

engine/lib/tcb/span.hpp

@@ -15,6 +15,7 @@ This is an implementation of C++20's std::span
 #include <array>
 #include <cstddef>
 #include <cstdint>
+#include <exception>
 #include <type_traits>
 
 #ifndef TCB_SPAN_NO_EXCEPTIONS

engine/sim/profileset_control.cpp

@@ -157,6 +157,8 @@ profileset_controller_t::profileset_controller_t( sim_t* sim, unsigned int id )
   assert( sim && sim->parent );
 }
 
+profileset_controller_t::~profileset_controller_t() = default;
+
 const std::string profileset_controller_t::message( call_point_e call_point )
 {
   std::string msg = fmt::format( "Profileset {} was canceled by Profileset Controller {} after {}",

engine/sim/profileset_control.hpp

@@ -95,7 +95,7 @@ struct profileset_controller_t : private noncopyable
   std::vector<std::unique_ptr<option_t>> options;
 
   profileset_controller_t( sim_t*, unsigned int );
-  virtual ~profileset_controller_t() = default;
+  virtual ~profileset_controller_t();
 
   const std::string message( call_point_e );
   void add_option( std::unique_ptr<option_t>&& );

simulationcraft.pri

@@ -6,7 +6,7 @@ INCLUDEPATH += ../engine/include
 INCLUDEPATH += ../engine/lib
 DEPENDPATH  = ../engine
 VPATH       = ..
-CONFIG      += c++17
+CONFIG      += c++20
 
 CONFIG(debug, debug|release): OBJECTS_DIR = build/debug
 CONFIG(release, debug|release): OBJECTS_DIR = build/release