diff options
Diffstat (limited to 'googletest/include/gtest/gtest-printers.h')
| -rw-r--r-- | googletest/include/gtest/gtest-printers.h | 223 |
1 files changed, 34 insertions, 189 deletions
diff --git a/googletest/include/gtest/gtest-printers.h b/googletest/include/gtest/gtest-printers.h index fad4e69..5467469 100644 --- a/googletest/include/gtest/gtest-printers.h +++ b/googletest/include/gtest/gtest-printers.h @@ -104,14 +104,12 @@ #include <ostream> // NOLINT #include <sstream> #include <string> +#include <tuple> +#include <type_traits> #include <utility> #include <vector> -#include "gtest/internal/gtest-port.h" #include "gtest/internal/gtest-internal.h" - -#if GTEST_HAS_STD_TUPLE_ -# include <tuple> -#endif +#include "gtest/internal/gtest-port.h" #if GTEST_HAS_ABSL #include "absl/strings/string_view.h" @@ -643,95 +641,31 @@ void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) { PrintTo(ref.get(), os); } -#if GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_ // Helper function for printing a tuple. T must be instantiated with // a tuple type. template <typename T> -void PrintTupleTo(const T& t, ::std::ostream* os); -#endif // GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_ - -#if GTEST_HAS_TR1_TUPLE -// Overload for ::std::tr1::tuple. Needed for printing function arguments, -// which are packed as tuples. - -// Overloaded PrintTo() for tuples of various arities. We support -// tuples of up-to 10 fields. The following implementation works -// regardless of whether tr1::tuple is implemented using the -// non-standard variadic template feature or not. - -inline void PrintTo(const ::std::tr1::tuple<>& t, ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1> -void PrintTo(const ::std::tr1::tuple<T1>& t, ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2> -void PrintTo(const ::std::tr1::tuple<T1, T2>& t, ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3>& t, ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4>& t, ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4, T5>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5, - typename T6> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4, T5, T6>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5, - typename T6, typename T7> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5, - typename T6, typename T7, typename T8> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5, - typename T6, typename T7, typename T8, typename T9> -void PrintTo(const ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); -} - -template <typename T1, typename T2, typename T3, typename T4, typename T5, - typename T6, typename T7, typename T8, typename T9, typename T10> -void PrintTo( - const ::std::tr1::tuple<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>& t, - ::std::ostream* os) { - PrintTupleTo(t, os); +void PrintTupleTo(const T&, std::integral_constant<size_t, 0>, + ::std::ostream*) {} + +template <typename T, size_t I> +void PrintTupleTo(const T& t, std::integral_constant<size_t, I>, + ::std::ostream* os) { + PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os); + GTEST_INTENTIONAL_CONST_COND_PUSH_() + if (I > 1) { + GTEST_INTENTIONAL_CONST_COND_POP_() + *os << ", "; + } + UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print( + std::get<I - 1>(t), os); } -#endif // GTEST_HAS_TR1_TUPLE -#if GTEST_HAS_STD_TUPLE_ template <typename... Types> void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) { - PrintTupleTo(t, os); + *os << "("; + PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os); + *os << ")"; } -#endif // GTEST_HAS_STD_TUPLE_ // Overload for std::pair. template <typename T1, typename T2> @@ -962,109 +896,20 @@ void UniversalPrint(const T& value, ::std::ostream* os) { typedef ::std::vector< ::std::string> Strings; -// TuplePolicy<TupleT> must provide: -// - tuple_size -// size of tuple TupleT. -// - get<size_t I>(const TupleT& t) -// static function extracting element I of tuple TupleT. -// - tuple_element<size_t I>::type -// type of element I of tuple TupleT. -template <typename TupleT> -struct TuplePolicy; - -#if GTEST_HAS_TR1_TUPLE -template <typename TupleT> -struct TuplePolicy { - typedef TupleT Tuple; - static const size_t tuple_size = ::std::tr1::tuple_size<Tuple>::value; - - template <size_t I> - struct tuple_element : ::std::tr1::tuple_element<static_cast<int>(I), Tuple> { - }; - - template <size_t I> - static typename AddReference<const typename ::std::tr1::tuple_element< - static_cast<int>(I), Tuple>::type>::type - get(const Tuple& tuple) { - return ::std::tr1::get<I>(tuple); - } -}; -template <typename TupleT> -const size_t TuplePolicy<TupleT>::tuple_size; -#endif // GTEST_HAS_TR1_TUPLE - -#if GTEST_HAS_STD_TUPLE_ -template <typename... Types> -struct TuplePolicy< ::std::tuple<Types...> > { - typedef ::std::tuple<Types...> Tuple; - static const size_t tuple_size = ::std::tuple_size<Tuple>::value; - - template <size_t I> - struct tuple_element : ::std::tuple_element<I, Tuple> {}; - - template <size_t I> - static const typename ::std::tuple_element<I, Tuple>::type& get( - const Tuple& tuple) { - return ::std::get<I>(tuple); - } -}; -template <typename... Types> -const size_t TuplePolicy< ::std::tuple<Types...> >::tuple_size; -#endif // GTEST_HAS_STD_TUPLE_ - -#if GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_ -// This helper template allows PrintTo() for tuples and -// UniversalTersePrintTupleFieldsToStrings() to be defined by -// induction on the number of tuple fields. The idea is that -// TuplePrefixPrinter<N>::PrintPrefixTo(t, os) prints the first N -// fields in tuple t, and can be defined in terms of -// TuplePrefixPrinter<N - 1>. -// -// The inductive case. -template <size_t N> -struct TuplePrefixPrinter { - // Prints the first N fields of a tuple. - template <typename Tuple> - static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) { - TuplePrefixPrinter<N - 1>::PrintPrefixTo(t, os); - GTEST_INTENTIONAL_CONST_COND_PUSH_() - if (N > 1) { - GTEST_INTENTIONAL_CONST_COND_POP_() - *os << ", "; - } - UniversalPrinter< - typename TuplePolicy<Tuple>::template tuple_element<N - 1>::type> - ::Print(TuplePolicy<Tuple>::template get<N - 1>(t), os); - } - // Tersely prints the first N fields of a tuple to a string vector, // one element for each field. - template <typename Tuple> - static void TersePrintPrefixToStrings(const Tuple& t, Strings* strings) { - TuplePrefixPrinter<N - 1>::TersePrintPrefixToStrings(t, strings); - ::std::stringstream ss; - UniversalTersePrint(TuplePolicy<Tuple>::template get<N - 1>(t), &ss); - strings->push_back(ss.str()); - } -}; - -// Base case. -template <> -struct TuplePrefixPrinter<0> { - template <typename Tuple> - static void PrintPrefixTo(const Tuple&, ::std::ostream*) {} - - template <typename Tuple> - static void TersePrintPrefixToStrings(const Tuple&, Strings*) {} -}; - -// Helper function for printing a tuple. -// Tuple must be either std::tr1::tuple or std::tuple type. template <typename Tuple> -void PrintTupleTo(const Tuple& t, ::std::ostream* os) { - *os << "("; - TuplePrefixPrinter<TuplePolicy<Tuple>::tuple_size>::PrintPrefixTo(t, os); - *os << ")"; +void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>, + Strings*) {} +template <typename Tuple, size_t I> +void TersePrintPrefixToStrings(const Tuple& t, + std::integral_constant<size_t, I>, + Strings* strings) { + TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(), + strings); + ::std::stringstream ss; + UniversalTersePrint(std::get<I - 1>(t), &ss); + strings->push_back(ss.str()); } // Prints the fields of a tuple tersely to a string vector, one @@ -1073,11 +918,11 @@ void PrintTupleTo(const Tuple& t, ::std::ostream* os) { template <typename Tuple> Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) { Strings result; - TuplePrefixPrinter<TuplePolicy<Tuple>::tuple_size>:: - TersePrintPrefixToStrings(value, &result); + TersePrintPrefixToStrings( + value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(), + &result); return result; } -#endif // GTEST_HAS_TR1_TUPLE || GTEST_HAS_STD_TUPLE_ } // namespace internal |