Add GCC 15 support.

Author: threeifbyair

regression-tests/run-tests.sh

@@ -179,6 +179,10 @@ else
         exec_out_dir="$expected_results_dir/gcc-13"
     elif [[ "$compiler_version" == *"g++-14"* ]]; then
         exec_out_dir="$expected_results_dir/gcc-14"
+    elif [[ "$compiler_version" == *"g++-15"* ||
+            "$compiler_version" == *"g++ (Ubuntu 15"*
+         ]]; then
+        exec_out_dir="$expected_results_dir/gcc-15"
     else
         printf "Unhandled compiler version:\n$compiler_version\n\n"
         exit 2

regression-tests/test-results/gcc-15-c++2b/gcc-version.output

@@ -0,0 +1,5 @@
+gcc (Ubuntu 15.2.0-4ubuntu4) 15.2.0
+Copyright (C) 2025 Free Software Foundation, Inc.
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+

regression-tests/test-results/gcc-15-c++2b/mixed-allcpp1-hello.cpp.execution

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

regression-tests/test-results/gcc-15-c++2b/mixed-as-for-variant-20-types.cpp.execution

@@ -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/gcc-15-c++2b/mixed-autodiff-taylor.cpp.execution

@@ -0,0 +1,63 @@
+x + x = 4.000000
+x + x diff order 1 = 2.000000
+x + x diff order 2 = 0.000000
+x + x diff order 3 = 0.000000
+x + x diff order 4 = 0.000000
+x + x diff order 5 = 0.000000
+x + x diff order 6 = 0.000000
+0 - x = -2.000000
+0 - x diff order 1 = -1.000000
+0 - x diff order 2 = 0.000000
+0 - x diff order 3 = 0.000000
+0 - x diff order 4 = 0.000000
+0 - x diff order 5 = 0.000000
+0 - x diff order 6 = 0.000000
+x^7 = 128.000000
+x^7 diff order 1 = 448.000000
+x^7 diff order 2 = 1344.000000
+x^7 diff order 3 = 3360.000000
+x^7 diff order 4 = 6720.000000
+x^7 diff order 5 = 10080.000000
+x^7 diff order 6 = 10080.000000
+1/x = 0.500000
+1/x diff order 1 = -0.250000
+1/x diff order 2 = 0.250000
+1/x diff order 3 = -0.375000
+1/x diff order 4 = 0.750000
+1/x diff order 5 = -1.875000
+1/x diff order 6 = 5.625000
+sqrt(x) = 1.414214
+sqrt(x) diff order 1 = 0.353553
+sqrt(x) diff order 2 = -0.088388
+sqrt(x) diff order 3 = 0.066291
+sqrt(x) diff order 4 = -0.082864
+sqrt(x) diff order 5 = 0.145012
+sqrt(x) diff order 6 = -0.326277
+log(x) = 0.693147
+log(x) diff order 1 = 0.500000
+log(x) diff order 2 = -0.250000
+log(x) diff order 3 = 0.250000
+log(x) diff order 4 = -0.375000
+log(x) diff order 5 = 0.750000
+log(x) diff order 6 = -1.875000
+exp(x) = 7.389056
+exp(x) diff order 1 = 7.389056
+exp(x) diff order 2 = 7.389056
+exp(x) diff order 3 = 7.389056
+exp(x) diff order 4 = 7.389056
+exp(x) diff order 5 = 7.389056
+exp(x) diff order 6 = 7.389056
+sin(x) = 0.909297
+sin(x) diff order 1 = -0.416147
+sin(x) diff order 2 = -0.909297
+sin(x) diff order 3 = 0.416147
+sin(x) diff order 4 = 0.909297
+sin(x) diff order 5 = -0.416147
+sin(x) diff order 6 = -0.909297
+cos(x) = -0.416147
+cos(x) diff order 1 = -0.909297
+cos(x) diff order 2 = 0.416147
+cos(x) diff order 3 = 0.909297
+cos(x) diff order 4 = -0.416147
+cos(x) diff order 5 = -0.909297
+cos(x) diff order 6 = 0.416147

regression-tests/test-results/gcc-15-c++2b/mixed-bounds-check.cpp.execution

@@ -0,0 +1 @@
+mixed-bounds-check.cpp2(9) int main(): Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]

regression-tests/test-results/gcc-15-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution

@@ -0,0 +1,5 @@
+1
+44
+45
+46
+5

regression-tests/test-results/gcc-15-c++2b/mixed-bounds-safety-with-assert.cpp.execution

@@ -0,0 +1 @@
+mixed-bounds-safety-with-assert.cpp2(11) void print_subrange(const auto:126&, cpp2::impl::in<int>, cpp2::impl::in<int>) [with auto:126 = std::vector<int>; cpp2::impl::in<int> = const int]: Bounds safety violation

regression-tests/test-results/gcc-15-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output

@@ -0,0 +1,21 @@
+In file included from mixed-bugfix-for-ufcs-non-local.cpp:6:
+../../../include/cpp2util.h:10059:1: error: lambda-expression in template parameter type
+../../../include/cpp2util.h:10096:59: note: in expansion of macro ‘CPP2_UFCS_’
+mixed-bugfix-for-ufcs-non-local.cpp2:13:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:13:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:10059:1: error: lambda-expression in template parameter type
+../../../include/cpp2util.h:10096:59: note: in expansion of macro ‘CPP2_UFCS_’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:10059:1: error: lambda-expression in template parameter type
+../../../include/cpp2util.h:10096:59: note: in expansion of macro ‘CPP2_UFCS_’
+mixed-bugfix-for-ufcs-non-local.cpp2:31:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:31:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:10059:1: error: lambda-expression in template parameter type
+../../../include/cpp2util.h:10096:59: note: in expansion of macro ‘CPP2_UFCS_’
+mixed-bugfix-for-ufcs-non-local.cpp2:33:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:33:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:10059:1: error: lambda-expression in template parameter type
+../../../include/cpp2util.h:10096:59: note: in expansion of macro ‘CPP2_UFCS_’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:36: error: template argument 1 is invalid

regression-tests/test-results/gcc-15-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution

@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish