Start convert from C# to C++. Issue: linksplatform#48

VasiliyevAD · Nov 19, 2021 · 48a377f · 48a377f
1 parent 297341e
commit 48a377f
Show file tree

Hide file tree

Showing 4 changed files with 66 additions and 19 deletions.
diff --git a/cpp/Platform.Converters/CachingConverterDecorator.h b/cpp/Platform.Converters/CachingConverterDecorator.h
@@ -1,15 +1,32 @@
-namespace Platform::Converters
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <unordered_map>
+
+namespace Platform::Converters
 {
-    template <typename ...> class CachingConverterDecorator;
-    template <typename TSource, typename TTarget> class CachingConverterDecorator<TSource, TTarget> : public IConverter<TSource, TTarget>
+    template <typename ...> class Cached;
+    template <typename TSource, typename TTarget> class Cached<TSource, TTarget>
     {
-        private: readonly IConverter<TSource, TTarget> *_baseConverter;
-        private: readonly IDictionary<TSource, TTarget> *_cache;
+        private: std::unique_ptr<std::function<TTarget(TSource)>> _baseConverter;
+        private: std::unordered_map<TSource, TTarget> _cache;
 
-        public: CachingConverterDecorator(IConverter<TSource, TTarget> &baseConverter, IDictionary<TSource, TTarget> &cache) { (_baseConverter, _cache) = (baseConverter, cache); }
+        public: Cached(std::function<TTarget(TSource)>& baseConverter, std::unordered_map<TSource, TTarget>& cache): _baseConverter(baseConverter), _cache(cache) {}
 
-        public: CachingConverterDecorator(IConverter<TSource, TTarget> &baseConverter) : this(baseConverter, Dictionary<TSource, TTarget>()) { }
+        public: Cached(std::function<TTarget(TSource)>& baseConverter): _baseConverter(baseConverter), _cache() {}
 
-        public: TTarget Convert(TSource source) { return _cache.GetOrAdd(source, _baseConverter.Convert); }
+        public: TTarget operator()(const TSource& source)
+        {
+            auto cursor = _cache.find(source);
+            if (cursor != _cache.end())
+            {
+                return *cursor;
+            }
+            else 
+            {
+                return *_cache.insert({source, _baseConverter(source)})
+            }
+        }
     };
 }
diff --git a/cpp/Platform.Converters/IConverter[T].h b/cpp/Platform.Converters/IConverter[T].h
@@ -1,8 +1 @@
-namespace Platform::Converters
-{
-    template <typename ...> class IConverter;
-    template <typename T> class IConverter<T> : public IConverter<T, T>
-    {
-    public:
-    };
-}
+// Translation is not required
diff --git a/cpp/Platform.Converters/Platform.Converters.TemplateLibrary.vcxproj b/cpp/Platform.Converters/Platform.Converters.TemplateLibrary.vcxproj
@@ -99,6 +99,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpp20</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -138,12 +139,22 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClInclude Include="CachingConverterDecorator.h" />
+    <ClInclude Include="CheckedConverter.h" />
     <ClInclude Include="Convert.h" />
     <ClInclude Include="Converter.h" />
+    <ClInclude Include="ConverterBase.h" />
+    <ClInclude Include="IConverter[TSource, TTarget].h" />
     <ClInclude Include="To.h" />
-    <ClInclude Include="is_detected.h" />
     <ClInclude Include="Platform.Converters.h" />
     <ClInclude Include="StringConverter.h" />
+    <ClInclude Include="UncheckedConverter.h" />
+    <ClInclude Include="UncheckedSignExtendingConverter.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\Platform.Converters.Benchmarks\Int32ToUInt64ConverterBenchmarks.cpp" />
+    <ClCompile Include="..\Platform.Converters.Benchmarks\Program.cpp" />
+    <ClCompile Include="..\Platform.Converters.Benchmarks\UInt64ToUInt64ConverterBenchmarks.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

diff --git a/cpp/Platform.Converters/Platform.Converters.TemplateLibrary.vcxproj.filters b/cpp/Platform.Converters/Platform.Converters.TemplateLibrary.vcxproj.filters
@@ -27,11 +27,37 @@
     <ClInclude Include="StringConverter.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="is_detected.h">
+    <ClInclude Include="To.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="To.h">
+    <ClInclude Include="CachingConverterDecorator.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="CheckedConverter.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="ConverterBase.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="IConverter[TSource, TTarget].h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="UncheckedConverter.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="UncheckedSignExtendingConverter.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\Platform.Converters.Benchmarks\Int32ToUInt64ConverterBenchmarks.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\Platform.Converters.Benchmarks\Program.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\Platform.Converters.Benchmarks\UInt64ToUInt64ConverterBenchmarks.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>