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	This way it is explicit when there is a `StringRef` -> `std::string` conversion and makes it easier to look for allocations that could be avoided. Doing this has already removed one allocation per registered test case, as there was a completely pointless `StringRef` -> `std::string` conversion when parsing tags of a test case.
		
			
				
	
	
		
			669 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			669 lines
		
	
	
		
			20 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
/*
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 *  Created by Phil on 8/5/2012.
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 *  Copyright 2012 Two Blue Cubes Ltd. All rights reserved.
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 *
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 *  Distributed under the Boost Software License, Version 1.0. (See accompanying
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 *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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 */
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#ifndef TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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#define TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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#include <vector>
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#include <cstddef>
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#include <type_traits>
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#include <string>
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#include "catch_compiler_capabilities.h"
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#include "catch_stream.h"
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#include "catch_interfaces_enum_values_registry.h"
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#ifdef CATCH_CONFIG_CPP17_STRING_VIEW
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#include <string_view>
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#endif
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#ifdef __OBJC__
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#include "catch_objc_arc.hpp"
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#endif
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable:4180) // We attempt to stream a function (address) by const&, which MSVC complains about but is harmless
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#endif
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namespace Catch {
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    namespace Detail {
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        extern const std::string unprintableString;
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        std::string rawMemoryToString( const void *object, std::size_t size );
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        template<typename T>
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        std::string rawMemoryToString( const T& object ) {
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          return rawMemoryToString( &object, sizeof(object) );
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        }
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        template<typename T>
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        class IsStreamInsertable {
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            template<typename Stream, typename U>
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            static auto test(int)
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                -> decltype(std::declval<Stream&>() << std::declval<U>(), std::true_type());
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            template<typename, typename>
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            static auto test(...)->std::false_type;
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        public:
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            static const bool value = decltype(test<std::ostream, const T&>(0))::value;
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        };
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        template<typename E>
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        std::string convertUnknownEnumToString( E e );
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        template<typename T>
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        typename std::enable_if<
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            !std::is_enum<T>::value && !std::is_base_of<std::exception, T>::value,
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        std::string>::type convertUnstreamable( T const& ) {
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            return Detail::unprintableString;
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        }
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        template<typename T>
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        typename std::enable_if<
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            !std::is_enum<T>::value && std::is_base_of<std::exception, T>::value,
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         std::string>::type convertUnstreamable(T const& ex) {
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            return ex.what();
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        }
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        template<typename T>
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        typename std::enable_if<
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            std::is_enum<T>::value
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        , std::string>::type convertUnstreamable( T const& value ) {
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            return convertUnknownEnumToString( value );
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        }
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#if defined(_MANAGED)
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        //! Convert a CLR string to a utf8 std::string
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        template<typename T>
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        std::string clrReferenceToString( T^ ref ) {
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            if (ref == nullptr)
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                return std::string("null");
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            auto bytes = System::Text::Encoding::UTF8->GetBytes(ref->ToString());
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            cli::pin_ptr<System::Byte> p = &bytes[0];
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            return std::string(reinterpret_cast<char const *>(p), bytes->Length);
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        }
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#endif
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    } // namespace Detail
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    // If we decide for C++14, change these to enable_if_ts
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    template <typename T, typename = void>
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    struct StringMaker {
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        template <typename Fake = T>
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        static
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        typename std::enable_if<::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
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            convert(const Fake& value) {
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                ReusableStringStream rss;
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                // NB: call using the function-like syntax to avoid ambiguity with
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                // user-defined templated operator<< under clang.
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                rss.operator<<(value);
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                return rss.str();
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        }
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        template <typename Fake = T>
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        static
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        typename std::enable_if<!::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
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            convert( const Fake& value ) {
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#if !defined(CATCH_CONFIG_FALLBACK_STRINGIFIER)
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            return Detail::convertUnstreamable(value);
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#else
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            return CATCH_CONFIG_FALLBACK_STRINGIFIER(value);
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#endif
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        }
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    };
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    namespace Detail {
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        // This function dispatches all stringification requests inside of Catch.
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        // Should be preferably called fully qualified, like ::Catch::Detail::stringify
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        template <typename T>
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        std::string stringify(const T& e) {
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            return ::Catch::StringMaker<typename std::remove_cv<typename std::remove_reference<T>::type>::type>::convert(e);
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        }
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        template<typename E>
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        std::string convertUnknownEnumToString( E e ) {
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            return ::Catch::Detail::stringify(static_cast<typename std::underlying_type<E>::type>(e));
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        }
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#if defined(_MANAGED)
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        template <typename T>
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        std::string stringify( T^ e ) {
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            return ::Catch::StringMaker<T^>::convert(e);
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        }
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#endif
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    } // namespace Detail
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    // Some predefined specializations
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    template<>
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    struct StringMaker<std::string> {
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        static std::string convert(const std::string& str);
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    };
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#ifdef CATCH_CONFIG_CPP17_STRING_VIEW
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    template<>
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    struct StringMaker<std::string_view> {
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        static std::string convert(std::string_view str);
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    };
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#endif
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    template<>
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    struct StringMaker<char const *> {
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        static std::string convert(char const * str);
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    };
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    template<>
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    struct StringMaker<char *> {
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        static std::string convert(char * str);
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    };
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#ifdef CATCH_CONFIG_WCHAR
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    template<>
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    struct StringMaker<std::wstring> {
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        static std::string convert(const std::wstring& wstr);
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    };
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# ifdef CATCH_CONFIG_CPP17_STRING_VIEW
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    template<>
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    struct StringMaker<std::wstring_view> {
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        static std::string convert(std::wstring_view str);
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    };
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# endif
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    template<>
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    struct StringMaker<wchar_t const *> {
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        static std::string convert(wchar_t const * str);
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    };
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    template<>
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    struct StringMaker<wchar_t *> {
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        static std::string convert(wchar_t * str);
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    };
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#endif
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    // TBD: Should we use `strnlen` to ensure that we don't go out of the buffer,
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    //      while keeping string semantics?
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    template<int SZ>
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    struct StringMaker<char[SZ]> {
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        static std::string convert(char const* str) {
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            return ::Catch::Detail::stringify(std::string{ str });
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        }
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    };
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    template<int SZ>
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    struct StringMaker<signed char[SZ]> {
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        static std::string convert(signed char const* str) {
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            return ::Catch::Detail::stringify(std::string{ reinterpret_cast<char const *>(str) });
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        }
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    };
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    template<int SZ>
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    struct StringMaker<unsigned char[SZ]> {
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        static std::string convert(unsigned char const* str) {
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            return ::Catch::Detail::stringify(std::string{ reinterpret_cast<char const *>(str) });
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        }
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    };
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#if defined(CATCH_CONFIG_CPP17_BYTE)
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    template<>
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    struct StringMaker<std::byte> {
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        static std::string convert(std::byte value);
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    };
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#endif // defined(CATCH_CONFIG_CPP17_BYTE)
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    template<>
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    struct StringMaker<int> {
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        static std::string convert(int value);
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    };
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    template<>
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    struct StringMaker<long> {
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        static std::string convert(long value);
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    };
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    template<>
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    struct StringMaker<long long> {
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        static std::string convert(long long value);
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    };
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    template<>
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    struct StringMaker<unsigned int> {
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        static std::string convert(unsigned int value);
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    };
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    template<>
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    struct StringMaker<unsigned long> {
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        static std::string convert(unsigned long value);
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    };
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    template<>
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    struct StringMaker<unsigned long long> {
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        static std::string convert(unsigned long long value);
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    };
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    template<>
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    struct StringMaker<bool> {
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        static std::string convert(bool b);
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    };
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    template<>
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    struct StringMaker<char> {
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        static std::string convert(char c);
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    };
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    template<>
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    struct StringMaker<signed char> {
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        static std::string convert(signed char c);
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    };
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    template<>
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    struct StringMaker<unsigned char> {
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        static std::string convert(unsigned char c);
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    };
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    template<>
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    struct StringMaker<std::nullptr_t> {
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        static std::string convert(std::nullptr_t);
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    };
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    template<>
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    struct StringMaker<float> {
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        static std::string convert(float value);
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        static int precision;
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    };
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    template<>
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    struct StringMaker<double> {
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        static std::string convert(double value);
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        static int precision;
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    };
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    template <typename T>
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    struct StringMaker<T*> {
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        template <typename U>
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        static std::string convert(U* p) {
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            if (p) {
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                return ::Catch::Detail::rawMemoryToString(p);
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            } else {
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                return "nullptr";
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            }
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        }
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    };
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    template <typename R, typename C>
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    struct StringMaker<R C::*> {
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        static std::string convert(R C::* p) {
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            if (p) {
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                return ::Catch::Detail::rawMemoryToString(p);
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            } else {
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                return "nullptr";
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            }
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        }
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    };
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#if defined(_MANAGED)
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    template <typename T>
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    struct StringMaker<T^> {
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        static std::string convert( T^ ref ) {
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            return ::Catch::Detail::clrReferenceToString(ref);
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        }
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    };
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#endif
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    namespace Detail {
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        template<typename InputIterator>
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        std::string rangeToString(InputIterator first, InputIterator last) {
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            ReusableStringStream rss;
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            rss << "{ ";
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            if (first != last) {
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                rss << ::Catch::Detail::stringify(*first);
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                for (++first; first != last; ++first)
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                    rss << ", " << ::Catch::Detail::stringify(*first);
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            }
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            rss << " }";
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            return rss.str();
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        }
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    }
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#ifdef __OBJC__
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    template<>
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    struct StringMaker<NSString*> {
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        static std::string convert(NSString * nsstring) {
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            if (!nsstring)
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                return "nil";
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            return std::string("@") + [nsstring UTF8String];
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        }
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    };
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    template<>
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    struct StringMaker<NSObject*> {
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        static std::string convert(NSObject* nsObject) {
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            return ::Catch::Detail::stringify([nsObject description]);
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        }
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 | 
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    };
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    namespace Detail {
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        inline std::string stringify( NSString* nsstring ) {
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            return StringMaker<NSString*>::convert( nsstring );
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        }
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    } // namespace Detail
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#endif // __OBJC__
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} // namespace Catch
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//////////////////////////////////////////////////////
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// Separate std-lib types stringification, so it can be selectively enabled
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// This means that we do not bring in
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#if defined(CATCH_CONFIG_ENABLE_ALL_STRINGMAKERS)
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#  define CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER
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#  define CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER
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#  define CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
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#  define CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
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#  define CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER
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#endif
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 | 
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// Separate std::pair specialization
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#if defined(CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER)
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#include <utility>
 | 
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namespace Catch {
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    template<typename T1, typename T2>
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    struct StringMaker<std::pair<T1, T2> > {
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        static std::string convert(const std::pair<T1, T2>& pair) {
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            ReusableStringStream rss;
 | 
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            rss << "{ "
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                << ::Catch::Detail::stringify(pair.first)
 | 
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                << ", "
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                << ::Catch::Detail::stringify(pair.second)
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                << " }";
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            return rss.str();
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        }
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    };
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}
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#endif // CATCH_CONFIG_ENABLE_PAIR_STRINGMAKER
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 | 
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#if defined(CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER) && defined(CATCH_CONFIG_CPP17_OPTIONAL)
 | 
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#include <optional>
 | 
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namespace Catch {
 | 
						|
    template<typename T>
 | 
						|
    struct StringMaker<std::optional<T> > {
 | 
						|
        static std::string convert(const std::optional<T>& optional) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            if (optional.has_value()) {
 | 
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                rss << ::Catch::Detail::stringify(*optional);
 | 
						|
            } else {
 | 
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                rss << "{ }";
 | 
						|
            }
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
}
 | 
						|
#endif // CATCH_CONFIG_ENABLE_OPTIONAL_STRINGMAKER
 | 
						|
 | 
						|
// Separate std::tuple specialization
 | 
						|
#if defined(CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER)
 | 
						|
#include <tuple>
 | 
						|
namespace Catch {
 | 
						|
    namespace Detail {
 | 
						|
        template<
 | 
						|
            typename Tuple,
 | 
						|
            std::size_t N = 0,
 | 
						|
            bool = (N < std::tuple_size<Tuple>::value)
 | 
						|
            >
 | 
						|
            struct TupleElementPrinter {
 | 
						|
            static void print(const Tuple& tuple, std::ostream& os) {
 | 
						|
                os << (N ? ", " : " ")
 | 
						|
                    << ::Catch::Detail::stringify(std::get<N>(tuple));
 | 
						|
                TupleElementPrinter<Tuple, N + 1>::print(tuple, os);
 | 
						|
            }
 | 
						|
        };
 | 
						|
 | 
						|
        template<
 | 
						|
            typename Tuple,
 | 
						|
            std::size_t N
 | 
						|
        >
 | 
						|
            struct TupleElementPrinter<Tuple, N, false> {
 | 
						|
            static void print(const Tuple&, std::ostream&) {}
 | 
						|
        };
 | 
						|
 | 
						|
    }
 | 
						|
 | 
						|
 | 
						|
    template<typename ...Types>
 | 
						|
    struct StringMaker<std::tuple<Types...>> {
 | 
						|
        static std::string convert(const std::tuple<Types...>& tuple) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            rss << '{';
 | 
						|
            Detail::TupleElementPrinter<std::tuple<Types...>>::print(tuple, rss.get());
 | 
						|
            rss << " }";
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
}
 | 
						|
#endif // CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER
 | 
						|
 | 
						|
#if defined(CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER) && defined(CATCH_CONFIG_CPP17_VARIANT)
 | 
						|
#include <variant>
 | 
						|
namespace Catch {
 | 
						|
    template<>
 | 
						|
    struct StringMaker<std::monostate> {
 | 
						|
        static std::string convert(const std::monostate&) {
 | 
						|
            return "{ }";
 | 
						|
        }
 | 
						|
    };
 | 
						|
 | 
						|
    template<typename... Elements>
 | 
						|
    struct StringMaker<std::variant<Elements...>> {
 | 
						|
        static std::string convert(const std::variant<Elements...>& variant) {
 | 
						|
            if (variant.valueless_by_exception()) {
 | 
						|
                return "{valueless variant}";
 | 
						|
            } else {
 | 
						|
                return std::visit(
 | 
						|
                    [](const auto& value) {
 | 
						|
                        return ::Catch::Detail::stringify(value);
 | 
						|
                    },
 | 
						|
                    variant
 | 
						|
                );
 | 
						|
            }
 | 
						|
        }
 | 
						|
    };
 | 
						|
}
 | 
						|
#endif // CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
 | 
						|
 | 
						|
namespace Catch {
 | 
						|
    struct not_this_one {}; // Tag type for detecting which begin/ end are being selected
 | 
						|
 | 
						|
    // Import begin/ end from std here so they are considered alongside the fallback (...) overloads in this namespace
 | 
						|
    using std::begin;
 | 
						|
    using std::end;
 | 
						|
 | 
						|
    not_this_one begin( ... );
 | 
						|
    not_this_one end( ... );
 | 
						|
 | 
						|
    template <typename T>
 | 
						|
    struct is_range {
 | 
						|
        static const bool value =
 | 
						|
            !std::is_same<decltype(begin(std::declval<T>())), not_this_one>::value &&
 | 
						|
            !std::is_same<decltype(end(std::declval<T>())), not_this_one>::value;
 | 
						|
    };
 | 
						|
 | 
						|
#if defined(_MANAGED) // Managed types are never ranges
 | 
						|
    template <typename T>
 | 
						|
    struct is_range<T^> {
 | 
						|
        static const bool value = false;
 | 
						|
    };
 | 
						|
#endif
 | 
						|
 | 
						|
    template<typename Range>
 | 
						|
    std::string rangeToString( Range const& range ) {
 | 
						|
        return ::Catch::Detail::rangeToString( begin( range ), end( range ) );
 | 
						|
    }
 | 
						|
 | 
						|
    // Handle vector<bool> specially
 | 
						|
    template<typename Allocator>
 | 
						|
    std::string rangeToString( std::vector<bool, Allocator> const& v ) {
 | 
						|
        ReusableStringStream rss;
 | 
						|
        rss << "{ ";
 | 
						|
        bool first = true;
 | 
						|
        for( bool b : v ) {
 | 
						|
            if( first )
 | 
						|
                first = false;
 | 
						|
            else
 | 
						|
                rss << ", ";
 | 
						|
            rss << ::Catch::Detail::stringify( b );
 | 
						|
        }
 | 
						|
        rss << " }";
 | 
						|
        return rss.str();
 | 
						|
    }
 | 
						|
 | 
						|
    template<typename R>
 | 
						|
    struct StringMaker<R, typename std::enable_if<is_range<R>::value && !::Catch::Detail::IsStreamInsertable<R>::value>::type> {
 | 
						|
        static std::string convert( R const& range ) {
 | 
						|
            return rangeToString( range );
 | 
						|
        }
 | 
						|
    };
 | 
						|
 | 
						|
    template <typename T, int SZ>
 | 
						|
    struct StringMaker<T[SZ]> {
 | 
						|
        static std::string convert(T const(&arr)[SZ]) {
 | 
						|
            return rangeToString(arr);
 | 
						|
        }
 | 
						|
    };
 | 
						|
 | 
						|
 | 
						|
} // namespace Catch
 | 
						|
 | 
						|
// Separate std::chrono::duration specialization
 | 
						|
#if defined(CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER)
 | 
						|
#include <ctime>
 | 
						|
#include <ratio>
 | 
						|
#include <chrono>
 | 
						|
 | 
						|
 | 
						|
namespace Catch {
 | 
						|
 | 
						|
template <class Ratio>
 | 
						|
struct ratio_string {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
 | 
						|
template <class Ratio>
 | 
						|
std::string ratio_string<Ratio>::symbol() {
 | 
						|
    Catch::ReusableStringStream rss;
 | 
						|
    rss << '[' << Ratio::num << '/'
 | 
						|
        << Ratio::den << ']';
 | 
						|
    return rss.str();
 | 
						|
}
 | 
						|
template <>
 | 
						|
struct ratio_string<std::atto> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
template <>
 | 
						|
struct ratio_string<std::femto> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
template <>
 | 
						|
struct ratio_string<std::pico> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
template <>
 | 
						|
struct ratio_string<std::nano> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
template <>
 | 
						|
struct ratio_string<std::micro> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
template <>
 | 
						|
struct ratio_string<std::milli> {
 | 
						|
    static std::string symbol();
 | 
						|
};
 | 
						|
 | 
						|
    ////////////
 | 
						|
    // std::chrono::duration specializations
 | 
						|
    template<typename Value, typename Ratio>
 | 
						|
    struct StringMaker<std::chrono::duration<Value, Ratio>> {
 | 
						|
        static std::string convert(std::chrono::duration<Value, Ratio> const& duration) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            rss << duration.count() << ' ' << ratio_string<Ratio>::symbol() << 's';
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
    template<typename Value>
 | 
						|
    struct StringMaker<std::chrono::duration<Value, std::ratio<1>>> {
 | 
						|
        static std::string convert(std::chrono::duration<Value, std::ratio<1>> const& duration) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            rss << duration.count() << " s";
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
    template<typename Value>
 | 
						|
    struct StringMaker<std::chrono::duration<Value, std::ratio<60>>> {
 | 
						|
        static std::string convert(std::chrono::duration<Value, std::ratio<60>> const& duration) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            rss << duration.count() << " m";
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
    template<typename Value>
 | 
						|
    struct StringMaker<std::chrono::duration<Value, std::ratio<3600>>> {
 | 
						|
        static std::string convert(std::chrono::duration<Value, std::ratio<3600>> const& duration) {
 | 
						|
            ReusableStringStream rss;
 | 
						|
            rss << duration.count() << " h";
 | 
						|
            return rss.str();
 | 
						|
        }
 | 
						|
    };
 | 
						|
 | 
						|
    ////////////
 | 
						|
    // std::chrono::time_point specialization
 | 
						|
    // Generic time_point cannot be specialized, only std::chrono::time_point<system_clock>
 | 
						|
    template<typename Clock, typename Duration>
 | 
						|
    struct StringMaker<std::chrono::time_point<Clock, Duration>> {
 | 
						|
        static std::string convert(std::chrono::time_point<Clock, Duration> const& time_point) {
 | 
						|
            return ::Catch::Detail::stringify(time_point.time_since_epoch()) + " since epoch";
 | 
						|
        }
 | 
						|
    };
 | 
						|
    // std::chrono::time_point<system_clock> specialization
 | 
						|
    template<typename Duration>
 | 
						|
    struct StringMaker<std::chrono::time_point<std::chrono::system_clock, Duration>> {
 | 
						|
        static std::string convert(std::chrono::time_point<std::chrono::system_clock, Duration> const& time_point) {
 | 
						|
            auto converted = std::chrono::system_clock::to_time_t(time_point);
 | 
						|
 | 
						|
#ifdef _MSC_VER
 | 
						|
            std::tm timeInfo = {};
 | 
						|
            gmtime_s(&timeInfo, &converted);
 | 
						|
#else
 | 
						|
            std::tm* timeInfo = std::gmtime(&converted);
 | 
						|
#endif
 | 
						|
 | 
						|
            auto const timeStampSize = sizeof("2017-01-16T17:06:45Z");
 | 
						|
            char timeStamp[timeStampSize];
 | 
						|
            const char * const fmt = "%Y-%m-%dT%H:%M:%SZ";
 | 
						|
 | 
						|
#ifdef _MSC_VER
 | 
						|
            std::strftime(timeStamp, timeStampSize, fmt, &timeInfo);
 | 
						|
#else
 | 
						|
            std::strftime(timeStamp, timeStampSize, fmt, timeInfo);
 | 
						|
#endif
 | 
						|
            return std::string(timeStamp);
 | 
						|
        }
 | 
						|
    };
 | 
						|
}
 | 
						|
#endif // CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
 | 
						|
 | 
						|
#define INTERNAL_CATCH_REGISTER_ENUM( enumName, ... ) \
 | 
						|
namespace Catch { \
 | 
						|
    template<> struct StringMaker<enumName> { \
 | 
						|
        static std::string convert( enumName value ) { \
 | 
						|
            static const auto& enumInfo = ::Catch::getMutableRegistryHub().getMutableEnumValuesRegistry().registerEnum( #enumName, #__VA_ARGS__, { __VA_ARGS__ } ); \
 | 
						|
            return static_cast<std::string>(enumInfo.lookup( static_cast<int>( value ) )); \
 | 
						|
        } \
 | 
						|
    }; \
 | 
						|
}
 | 
						|
 | 
						|
#define CATCH_REGISTER_ENUM( enumName, ... ) INTERNAL_CATCH_REGISTER_ENUM( enumName, __VA_ARGS__ )
 | 
						|
 | 
						|
#ifdef _MSC_VER
 | 
						|
#pragma warning(pop)
 | 
						|
#endif
 | 
						|
 | 
						|
#endif // TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
 |