Add tests for dynamic allocated cpp_int

Author: marcoffee

config/Jamfile.v2

@@ -77,6 +77,7 @@ exe has_eigen : has_eigen.cpp ;
 exe has_f2c : has_f2c.cpp f2c ;
 obj has_is_constant_evaluated : has_is_constant_evaluated.cpp ;
 obj has_constexpr_limits : has_constexpr_limits_cmd.cpp : <cxxflags>-fconstexpr-ops-limit=268435456 ;
+obj has_constexpr_dynamic_memory : has_constexpr_dynamic_memory.cpp : <cxxflags>-std=c++2a ;
 obj has_big_obj : has_big_obj.cpp : <cxxflags>-Wa,-mbig-obj ;
 obj is_ci_sanitizer_run : is_ci_sanitizer_run.cpp ;
 
@@ -91,6 +92,7 @@ explicit has_mpc ;
 explicit has_eigen ;
 explicit has_is_constant_evaluated ;
 explicit has_constexpr_limits ;
+explicit has_constexpr_dynamic_memory ;
 explicit has_big_obj ;
 explicit has_f2c ;
 explicit is_ci_sanitizer_run ;

config/has_constexpr_dynamic_memory.cpp

@@ -0,0 +1,25 @@
+//  Copyright John Maddock 2025.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <memory>
+
+
+#if !defined(__cpp_constexpr_dynamic_alloc)
+#  error "__cpp_constexpr_dynamic_alloc is not defined"
+
+#elif __cpp_constexpr_dynamic_alloc < 201907
+#  error "__cpp_constexpr_dynamic_alloc is defined with value < 201907"
+
+#elif !defined(__cpp_lib_constexpr_dynamic_alloc)
+#  error "__cpp_lib_constexpr_dynamic_alloc is not defined"
+
+#elif __cpp_lib_constexpr_dynamic_alloc < 201907
+#  error "__cpp_lib_constexpr_dynamic_alloc is defined with value < 201907"
+#endif
+
+int main()
+{
+   return 0;
+}

test/Jamfile.v2

@@ -1062,6 +1062,8 @@ test-suite misc :
       [ run constexpr_test_cpp_int_5.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_is_constant_evaluated : : <build>no ] ]
       [ run constexpr_test_cpp_int_6.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_is_constant_evaluated : "<toolset>msvc:<cxxflags>-constexpr:steps10000000" <toolset>clang:<cxxflags>-fconstexpr-steps=268435456 : <build>no ] [ check-target-builds ../config//has_constexpr_limits : <cxxflags>-fconstexpr-ops-limit=268435456 ] ]
       [ run constexpr_test_cpp_int_7.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_is_constant_evaluated : "<toolset>msvc:<cxxflags>-constexpr:steps10000000" <toolset>clang:<cxxflags>-fconstexpr-steps=268435456 : <build>no ] ]
+      [ run constexpr_test_dynamic_cpp_int_1.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_constexpr_dynamic_memory : <toolset>msvc:<cxxflags>-constexpr\:steps10000000 <toolset>clang:<cxxflags>-fconstexpr-steps=268435456 <cxxflags>-std=c++2a : <build>no ] ]
+      [ run constexpr_test_dynamic_cpp_int_2.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_constexpr_dynamic_memory : <toolset>msvc:<cxxflags>-constexpr\:steps10000000 <toolset>clang:<cxxflags>-fconstexpr-steps=268435456 <cxxflags>-std=c++2a : <build>no ] ]
 
       [ compile test_nothrow_cpp_int.cpp ]
       [ compile test_nothrow_cpp_rational.cpp ]
@@ -1334,6 +1336,7 @@ test-suite standalone :
       [ run standalone_constexpr_test_cpp_int.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_is_constant_evaluated : : <build>no ] ]
       [ compile standalone_constexpr_test_float128.cpp :
          [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_float128 : <source>quadmath : <build>no ] ]
+      [ run standalone_constexpr_test_dynamic_cpp_int.cpp : : : [ requires cxx14_constexpr cxx17_if_constexpr ] [ check-target-builds ../config//has_constexpr_dynamic_memory : <toolset>msvc:<cxxflags>-constexpr\:steps10000000 <toolset>clang:<cxxflags>-fconstexpr-steps=268435456 <cxxflags>-std=c++2a : <build>no ] ]
 
       [ run standalone_test_arithmetic_complex128.cpp : : : [ check-target-builds ../config//has_float128 : <source>quadmath ] ]
       [ run standalone_test_arithmetic_cpp_bin_float.cpp no_eh_support  : : : <toolset>msvc:<cxxflags>/bigobj [ check-target-builds ../config//has_float128 : <source>quadmath ] ]