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7be8a41adf
Happening when using clang and templated operators, clang cannot decide between the operator provided by ReusableStringStream and the one provided by the value value as both are templates. This is easily solved by calling the operator<< through the member syntax. Fixes #1285
591 lines
18 KiB
C++
591 lines
18 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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#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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// We need a dummy global operator<< so we can bring it into Catch namespace later
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struct Catch_global_namespace_dummy {};
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std::ostream& operator<<(std::ostream&, Catch_global_namespace_dummy);
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namespace Catch {
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// Bring in operator<< from global namespace into Catch namespace
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using ::operator<<;
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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 SS, typename TT>
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static auto test(int)
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-> decltype(std::declval<SS&>() << std::declval<TT>(), 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_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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#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<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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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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};
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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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};
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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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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_CHRONO_STRINGMAKER
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#endif
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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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// Separate std::tuple specialization
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#if defined(CATCH_CONFIG_ENABLE_TUPLE_STRINGMAKER)
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#include <tuple>
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namespace Catch {
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namespace Detail {
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template<
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typename Tuple,
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std::size_t N = 0,
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bool = (N < std::tuple_size<Tuple>::value)
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>
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struct TupleElementPrinter {
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static void print(const Tuple& tuple, std::ostream& os) {
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os << (N ? ", " : " ")
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<< ::Catch::Detail::stringify(std::get<N>(tuple));
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TupleElementPrinter<Tuple, N + 1>::print(tuple, os);
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}
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};
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template<
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typename Tuple,
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std::size_t N
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>
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struct TupleElementPrinter<Tuple, N, false> {
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static void print(const Tuple&, std::ostream&) {}
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};
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}
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template<typename ...Types>
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struct StringMaker<std::tuple<Types...>> {
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static std::string convert(const std::tuple<Types...>& tuple) {
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ReusableStringStream rss;
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rss << '{';
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Detail::TupleElementPrinter<std::tuple<Types...>>::print(tuple, rss.get());
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rss << " }";
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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_TUPLE_STRINGMAKER
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namespace Catch {
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struct not_this_one {}; // Tag type for detecting which begin/ end are being selected
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// Import begin/ end from std here so they are considered alongside the fallback (...) overloads in this namespace
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using std::begin;
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using std::end;
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not_this_one begin( ... );
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not_this_one end( ... );
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template <typename T>
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struct is_range {
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static const bool value =
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!std::is_same<decltype(begin(std::declval<T>())), not_this_one>::value &&
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!std::is_same<decltype(end(std::declval<T>())), not_this_one>::value;
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};
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#if defined(_MANAGED) // Managed types are never ranges
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template <typename T>
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struct is_range<T^> {
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static const bool value = false;
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};
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#endif
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template<typename Range>
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std::string rangeToString( Range const& range ) {
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return ::Catch::Detail::rangeToString( begin( range ), end( range ) );
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}
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// Handle vector<bool> specially
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template<typename Allocator>
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std::string rangeToString( std::vector<bool, Allocator> const& v ) {
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ReusableStringStream rss;
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rss << "{ ";
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bool first = true;
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for( bool b : v ) {
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if( first )
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first = false;
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else
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rss << ", ";
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rss << ::Catch::Detail::stringify( b );
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}
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rss << " }";
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return rss.str();
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}
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template<typename R>
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struct StringMaker<R, typename std::enable_if<is_range<R>::value && !::Catch::Detail::IsStreamInsertable<R>::value>::type> {
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static std::string convert( R const& range ) {
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return rangeToString( range );
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}
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};
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template <typename T, int SZ>
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struct StringMaker<T[SZ]> {
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static std::string convert(T const(&arr)[SZ]) {
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return rangeToString(arr);
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}
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};
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} // namespace Catch
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// Separate std::chrono::duration specialization
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#if defined(CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER)
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#include <ctime>
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#include <ratio>
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#include <chrono>
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namespace Catch {
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template <class Ratio>
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struct ratio_string {
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static std::string symbol();
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};
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template <class Ratio>
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std::string ratio_string<Ratio>::symbol() {
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Catch::ReusableStringStream rss;
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rss << '[' << Ratio::num << '/'
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<< Ratio::den << ']';
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return rss.str();
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}
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template <>
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struct ratio_string<std::atto> {
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static std::string symbol();
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};
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template <>
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struct ratio_string<std::femto> {
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static std::string symbol();
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};
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template <>
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struct ratio_string<std::pico> {
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static std::string symbol();
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};
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template <>
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struct ratio_string<std::nano> {
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static std::string symbol();
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};
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template <>
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struct ratio_string<std::micro> {
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static std::string symbol();
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};
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template <>
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struct ratio_string<std::milli> {
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static std::string symbol();
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};
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////////////
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// std::chrono::duration specializations
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template<typename Value, typename Ratio>
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struct StringMaker<std::chrono::duration<Value, Ratio>> {
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static std::string convert(std::chrono::duration<Value, Ratio> const& duration) {
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ReusableStringStream rss;
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rss << duration.count() << ' ' << ratio_string<Ratio>::symbol() << 's';
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return rss.str();
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}
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};
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template<typename Value>
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struct StringMaker<std::chrono::duration<Value, std::ratio<1>>> {
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static std::string convert(std::chrono::duration<Value, std::ratio<1>> const& duration) {
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ReusableStringStream rss;
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rss << duration.count() << " s";
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return rss.str();
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}
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};
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template<typename Value>
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struct StringMaker<std::chrono::duration<Value, std::ratio<60>>> {
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static std::string convert(std::chrono::duration<Value, std::ratio<60>> const& duration) {
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ReusableStringStream rss;
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rss << duration.count() << " m";
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return rss.str();
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}
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};
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template<typename Value>
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struct StringMaker<std::chrono::duration<Value, std::ratio<3600>>> {
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static std::string convert(std::chrono::duration<Value, std::ratio<3600>> const& duration) {
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ReusableStringStream rss;
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rss << duration.count() << " h";
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return rss.str();
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}
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};
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////////////
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// std::chrono::time_point specialization
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// Generic time_point cannot be specialized, only std::chrono::time_point<system_clock>
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template<typename Clock, typename Duration>
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struct StringMaker<std::chrono::time_point<Clock, Duration>> {
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static std::string convert(std::chrono::time_point<Clock, Duration> const& time_point) {
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return ::Catch::Detail::stringify(time_point.time_since_epoch()) + " since epoch";
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}
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};
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// std::chrono::time_point<system_clock> specialization
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template<typename Duration>
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struct StringMaker<std::chrono::time_point<std::chrono::system_clock, Duration>> {
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static std::string convert(std::chrono::time_point<std::chrono::system_clock, Duration> const& time_point) {
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auto converted = std::chrono::system_clock::to_time_t(time_point);
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#ifdef _MSC_VER
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std::tm timeInfo = {};
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gmtime_s(&timeInfo, &converted);
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#else
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std::tm* timeInfo = std::gmtime(&converted);
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#endif
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auto const timeStampSize = sizeof("2017-01-16T17:06:45Z");
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char timeStamp[timeStampSize];
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const char * const fmt = "%Y-%m-%dT%H:%M:%SZ";
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#ifdef _MSC_VER
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std::strftime(timeStamp, timeStampSize, fmt, &timeInfo);
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#else
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std::strftime(timeStamp, timeStampSize, fmt, timeInfo);
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#endif
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return std::string(timeStamp);
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}
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};
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}
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#endif // CATCH_CONFIG_ENABLE_CHRONO_STRINGMAKER
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#endif // TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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