First commit of STRINGIFY_ENUM

include/internal/catch_enum_values_registry.cpp

@@ -0,0 +1,68 @@
+/*
+ *  Created by Phil on 4/4/2019.
+ *  Copyright 2019 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under 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 "catch_enum_values_registry.h"
+#include "catch_string_manip.h"
+#include "catch_stream.h"
+
+#include <map>
+
+namespace Catch {
+
+    IMutableEnumValuesRegistry::~IMutableEnumValuesRegistry() {}
+    IEnumInfo::~IEnumInfo() {}
+
+    namespace Detail {
+
+        std::vector<std::string> parseEnums( StringRef enums ) {
+            auto enumValues = splitString( enums, ',' );
+            std::vector<std::string> parsed;
+            parsed.reserve( enumValues.size() );
+            for( auto const& enumValue : enumValues ) {
+                auto identifiers = splitString( enumValue, ':' );
+                parsed.push_back( Catch::trim( identifiers.back() ) );
+            }
+            return parsed;
+        }
+
+        struct EnumInfo : IEnumInfo {
+            std::string m_name;
+            std::map<int, std::string> m_values;
+
+            ~EnumInfo();
+
+            std::string lookup( int value ) const override {
+                auto it = m_values.find( value );
+                if( it == m_values.end() ) {
+                    ReusableStringStream rss;
+                    rss << "{** unexpected value for " << m_name << ": " << value << "**}";
+                    return rss.str();
+                }
+                return it->second;
+            }
+        };
+        EnumInfo::~EnumInfo() {}
+
+        IEnumInfo const& EnumValuesRegistry::registerEnum( StringRef enumName, StringRef allValueNames, std::vector<int> const& values ) {
+            std::unique_ptr<EnumInfo> enumInfo( new EnumInfo );
+            enumInfo->m_name = enumName;
+
+            const auto valueNames = Catch::Detail::parseEnums( allValueNames );
+            assert( valueNames.size() == values.size() );
+            std::size_t i = 0;
+            for( auto value : values )
+                enumInfo->m_values.insert({ value, valueNames[i++] });
+
+            EnumInfo* raw = enumInfo.get();
+            m_enumInfos.push_back( std::move( enumInfo ) );
+            return *raw;
+        }
+
+    } // Detail
+
+} // Catch
+