CI Add Clang-18 C++23 regression tests (#1154)

* CI Update run_tests.sh

* CI Add clang-18 C++23 regression tests

Author: jarzec

.github/workflows/build-cppfront.yaml

@@ -52,7 +52,7 @@ jobs:
             cxx-std: 'c++20'
           - runs-on: ubuntu-24.04
             compiler: clang++-18
-            cxx-std: 'c++2b'
+            cxx-std: 'c++23'
           - runs-on: ubuntu-24.04
             compiler: g++-14
             cxx-std: 'c++2b'

.github/workflows/regression-tests.yml

@@ -35,6 +35,11 @@ jobs:
             compiler: clang++-18
             cxx_std: c++20
             stdlib: libstdc++
+          - os: ubuntu-24.04
+            shortosname: ubu-24
+            compiler: clang++-18
+            cxx_std: c++23
+            stdlib: libc++-18-dev
           - os: ubuntu-22.04
             shortosname: ubu-22
             compiler: clang++-15

regression-tests/run-tests.sh

@@ -116,6 +116,11 @@ if [ -z "$cxx_compiler" ]; then
     usage
 fi
 
+if [ -z "$label" ]; then
+    echo "Run label not specified"
+    usage
+fi
+
 tests=$(ls | grep ".cpp2$")
 if [[ -n "$chosen_tests" ]]; then
     for test in $chosen_tests; do

regression-tests/test-results/clang-18-c++23-libcpp/clang-version.output

@@ -0,0 +1,4 @@
+Ubuntu clang version 18.1.3 (1)
+Target: x86_64-pc-linux-gnu
+Thread model: posix
+InstalledDir: /usr/bin

regression-tests/test-results/clang-18-c++23-libcpp/mixed-allcpp1-hello.cpp.execution

@@ -0,0 +1 @@
+Hello world

regression-tests/test-results/clang-18-c++23-libcpp/mixed-allcpp1-hello.cpp.output

@@ -0,0 +1,60 @@
+v as X< 0> = 0
+v as X< 1> = 1
+v as X< 2> = 2
+v as X< 3> = 3
+v as X< 4> = 4
+v as X< 5> = 5
+v as X< 6> = 6
+v as X< 7> = 7
+v as X< 8> = 8
+v as X< 9> = 9
+v as X<10> = 10
+v as X<11> = 11
+v as X<12> = 12
+v as X<13> = 13
+v as X<14> = 14
+v as X<15> = 15
+v as X<16> = 16
+v as X<17> = 17
+v as X<18> = 18
+v as X<19> = 19
+as_const(v) as X< 0> = 0
+as_const(v) as X< 1> = 1
+as_const(v) as X< 2> = 2
+as_const(v) as X< 3> = 3
+as_const(v) as X< 4> = 4
+as_const(v) as X< 5> = 5
+as_const(v) as X< 6> = 6
+as_const(v) as X< 7> = 7
+as_const(v) as X< 8> = 8
+as_const(v) as X< 9> = 9
+as_const(v) as X<10> = 10
+as_const(v) as X<11> = 11
+as_const(v) as X<12> = 12
+as_const(v) as X<13> = 13
+as_const(v) as X<14> = 14
+as_const(v) as X<15> = 15
+as_const(v) as X<16> = 16
+as_const(v) as X<17> = 17
+as_const(v) as X<18> = 18
+as_const(v) as X<19> = 19
+move(v) as X< 0> = 0
+move(v) as X< 1> = 1
+move(v) as X< 2> = 2
+move(v) as X< 3> = 3
+move(v) as X< 4> = 4
+move(v) as X< 5> = 5
+move(v) as X< 6> = 6
+move(v) as X< 7> = 7
+move(v) as X< 8> = 8
+move(v) as X< 9> = 9
+move(v) as X<10> = 10
+move(v) as X<11> = 11
+move(v) as X<12> = 12
+move(v) as X<13> = 13
+move(v) as X<14> = 14
+move(v) as X<15> = 15
+move(v) as X<16> = 16
+move(v) as X<17> = 17
+move(v) as X<18> = 18
+move(v) as X<19> = 19

regression-tests/test-results/clang-18-c++23-libcpp/mixed-as-for-variant-20-types.cpp.execution

@@ -0,0 +1 @@
+Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]