diff options
Diffstat (limited to 'googletest/include/gtest/internal/gtest-port.h')
| -rw-r--r-- | googletest/include/gtest/internal/gtest-port.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/googletest/include/gtest/internal/gtest-port.h b/googletest/include/gtest/internal/gtest-port.h index c5416935..81f047bf 100644 --- a/googletest/include/gtest/internal/gtest-port.h +++ b/googletest/include/gtest/internal/gtest-port.h @@ -1366,6 +1366,39 @@ inline void FlushInfoLog() { fflush(NULL); } GTEST_LOG_(FATAL) << #posix_call << "failed with error " \ << gtest_error +// Adds reference to a type if it is not a reference type, +// otherwise leaves it unchanged. This is the same as +// tr1::add_reference, which is not widely available yet. +template <typename T> +struct AddReference { typedef T& type; }; // NOLINT +template <typename T> +struct AddReference<T&> { typedef T& type; }; // NOLINT + +// A handy wrapper around AddReference that works when the argument T +// depends on template parameters. +#define GTEST_ADD_REFERENCE_(T) \ + typename ::testing::internal::AddReference<T>::type + +// Transforms "T" into "const T&" according to standard reference collapsing +// rules (this is only needed as a backport for C++98 compilers that do not +// support reference collapsing). Specifically, it transforms: +// +// char ==> const char& +// const char ==> const char& +// char& ==> char& +// const char& ==> const char& +// +// Note that the non-const reference will not have "const" added. This is +// standard, and necessary so that "T" can always bind to "const T&". +template <typename T> +struct ConstRef { typedef const T& type; }; +template <typename T> +struct ConstRef<T&> { typedef T& type; }; + +// The argument T must depend on some template parameters. +#define GTEST_REFERENCE_TO_CONST_(T) \ + typename ::testing::internal::ConstRef<T>::type + #if GTEST_HAS_STD_MOVE_ using std::forward; using std::move; |