TESTING:

* math_opti: add trace
* math_opt: add solvers info
* ci: investigate msvc compilation error

.github/workflows/amd64_windows_cmake_cpp.yml

@@ -12,6 +12,11 @@ jobs:
           windows-2022,
           #windows-2019,
         ]
+        build: [
+          ["Visual Studio 17 2022", "v143,version=14.37"],
+          ["Visual Studio 17 2022", "v143,version=14.36"],
+          ["Visual Studio 17 2022", "v143,version=14.35"],
+        ]
       fail-fast: false # Don't cancel all jobs if one fails.
     runs-on: ${{ matrix.runner }}
     #runs-on: windows-latest
@@ -22,10 +27,16 @@ jobs:
         cmake --version
         cmake -G || true
     - name: Configure
-      run: cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release -DBUILD_DEPS=ON
+      run: >
+        cmake -S. -Bbuild
+        -G "${{ matrix.build[0] }}" -T ${{ matrix.build[1] }}
+        -DCMAKE_BUILD_TYPE=Release
+        -DBUILD_DEPS=ON
     - name: Build
       run: cmake --build build --config Release --target ALL_BUILD -v -- /verbosity:d
     - name: Test
-      run: cmake --build build --config Release --target RUN_TESTS -v -- /verbosity:d
+      run: |
+        cmake --build build --config Release --target RUN_TESTS -v -- /verbosity:d
+        cd build && ctest -C Release --rerun-failed --output-on-failure -V
     - name: Install
       run: cmake --build build --config Release --target INSTALL -v -- /verbosity:d

ortools/math_opt/core/solver_interface.h

@@ -204,7 +204,9 @@ class AllSolversRegistry {
 #define MATH_OPT_REGISTER_SOLVER(solver_type, solver_factory)              \
   namespace {                                                              \
   const void* const kRegisterSolver ABSL_ATTRIBUTE_UNUSED = [] {           \
+    std::cerr << "registering " << ProtoEnumToString(solver_type) << std::endl; \
     AllSolversRegistry::Instance()->Register(solver_type, solver_factory); \
+    std::cerr << "registering " << ProtoEnumToString(solver_type) << "...DONE" << std::endl; \
     return nullptr;                                                        \
   }();                                                                     \
   }  // namespace

ortools/math_opt/samples/mathopt_info.cc

@@ -0,0 +1,50 @@
+// Copyright 2010-2022 Google LLC
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Check MathOpt available solvers.
+#include <iostream>
+
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_join.h"
+#include "ortools/base/init_google.h"
+
+#include "ortools/math_opt/cpp/math_opt.h"
+#include "ortools/math_opt/parameters.pb.h"
+#include "ortools/math_opt/core/solver_interface.h"
+//#include "ortools/math_opt/cpp/enums.h"
+
+namespace {
+
+struct SolverTypeProtoFormatter {
+  void operator()(
+      std::string* const out,
+      const operations_research::math_opt::SolverTypeProto solver_type) {
+    out->append(EnumToString(EnumFromProto(solver_type).value()));
+  }
+};
+
+}  // namespace
+
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, /*remove_flags=*/true);
+
+  std::cout <<
+    absl::StrCat(
+        "MathOpt is configured to support the following solvers: ",
+        absl::StrJoin(
+          operations_research::math_opt::AllSolversRegistry::Instance()->RegisteredSolvers(),
+          ", ",
+          SolverTypeProtoFormatter())) << std::endl;
+
+  return 0;
+}