Add D to B cast. (#66)

* Add D to B cast.

* parallel 4.

Co-authored-by: Bowen Fu <missing>

Author: BowenFu

.github/workflows/cmake.yml

@@ -39,5 +39,5 @@ jobs:
       working-directory: ${{github.workspace}}/build
       # Execute tests defined by the CMake configuration.  
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest --output-on-failure -C ${{env.BUILD_TYPE}}
+      run: ctest --output-on-failure --parallel 4 -C ${{env.BUILD_TYPE}}
 

.github/workflows/coverage.yml

@@ -42,7 +42,7 @@ jobs:
       working-directory: ${{github.workspace}}/build
       # Execute tests defined by the CMake configuration.  
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest --output-on-failure -C ${{env.BUILD_TYPE}}
+      run: ctest --output-on-failure --parallel 4 -C ${{env.BUILD_TYPE}}
 
     - name: Compute Coverage
       working-directory: ${{github.workspace}}/build

.github/workflows/sanitizers.yml

@@ -42,5 +42,5 @@ jobs:
       working-directory: ${{github.workspace}}/build
       # Execute tests defined by the CMake configuration.  
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest --output-on-failure -C ${{ matrix.build_type }}
+      run: ctest --output-on-failure --parallel 4 -C ${{ matrix.build_type }}
 

.github/workflows/valgrind.yml

@@ -43,6 +43,6 @@ jobs:
       # Execute tests defined by the CMake configuration.  
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
       run: |
-        ctest --output-on-failure -C ${{env.BUILD_TYPE}} --overwrite MemoryCheckCommandOptions="--leak-check=full --error-exitcode=100" -T memcheck
+        ctest --output-on-failure --parallel 4 -C ${{env.BUILD_TYPE}} --overwrite MemoryCheckCommandOptions="--leak-check=full --error-exitcode=100" -T memcheck
         # --overwrite MemoryCheckSuppressionFile=/path/to/valgrind.suppressions \
       

develop/matchit/utility.h

@@ -59,6 +59,13 @@ namespace matchit
         return std::any_cast<T>(std::addressof(a));
       }
 
+      template <typename D, typename std::enable_if<!viaGetIfV<T, D> && std::is_base_of_v<T, D>>::type * = nullptr>
+      constexpr auto operator()(D const &d) const
+          -> decltype(static_cast<T const *>(std::addressof(d)))
+      {
+        return static_cast<T const *>(std::addressof(d));
+      }
+
       template <typename B, typename std::enable_if<!viaGetIfV<T, B> && std::is_base_of_v<B, T>>::type * = nullptr>
       constexpr auto operator()(B const &b) const
           -> decltype(dynamic_cast<T const *>(std::addressof(b)))

include/matchit.h

@@ -1991,6 +1991,13 @@ namespace matchit
         return std::any_cast<T>(std::addressof(a));
       }
 
+      template <typename D, typename std::enable_if<!viaGetIfV<T, D> && std::is_base_of_v<T, D>>::type * = nullptr>
+      constexpr auto operator()(D const &d) const
+          -> decltype(static_cast<T const *>(std::addressof(d)))
+      {
+        return static_cast<T const *>(std::addressof(d));
+      }
+
       template <typename B, typename std::enable_if<!viaGetIfV<T, B> && std::is_base_of_v<B, T>>::type * = nullptr>
       constexpr auto operator()(B const &b) const
           -> decltype(dynamic_cast<T const *>(std::addressof(b)))

test/matchit/legacy.cpp

@@ -255,6 +255,17 @@ TEST(Match, test10)
   EXPECT_EQ(dynCast(std::unique_ptr<Shape>()), "None");
 }
 
+TEST(Match, test10_)
+{
+  auto const dToBCast = [](auto const &i)
+  {
+    return match(i)(pattern | some(as<Shape>(_)) = expr("Shape"),
+                    pattern | none = expr("None"));
+  };
+
+  EXPECT_EQ(dToBCast(std::make_unique<Circle>()), "Shape");
+}
+
 TEST(Match, test11)
 {
   auto const getIf = [](auto const &i)