gtest-printers.h | Explore in Territory

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// Google Test - The Google C++ Testing and Mocking Framework
//
// This file implements a universal value printer that can print a
// value of any type T:
//
//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
//
// A user can teach this function how to print a class type T by
// defining either operator<<() or PrintTo() in the namespace that
// defines T.  More specifically, the FIRST defined function in the
// following list will be used (assuming T is defined in namespace
// foo):
//
//   1. foo::PrintTo(const T&, ostream*)
//   2. operator<<(ostream&, const T&) defined in either foo or the
//      global namespace.
// * Prefer AbslStringify(..) to operator<<(..), per https://abseil.io/tips/215.
// * Define foo::PrintTo(..) if the type already has AbslStringify(..), but an
//   alternative presentation in test results is of interest.
//
// However if T is an STL-style container then it is printed element-wise
// unless foo::PrintTo(const T&, ostream*) is defined. Note that
// operator<<() is ignored for container types.
//
// If none of the above is defined, it will print the debug string of
// the value if it is a protocol buffer, or print the raw bytes in the
// value otherwise.
//
// To aid debugging: when T is a reference type, the address of the
// value is also printed; when T is a (const) char pointer, both the
// pointer value and the NUL-terminated string it points to are
// printed.
//
// We also provide some convenient wrappers:
//
//   // Prints a value to a string.  For a (const or not) char
//   // pointer, the NUL-terminated string (but not the pointer) is
//   // printed.
//   std::string ::testing::PrintToString(const T& value);
//
//   // Prints a value tersely: for a reference type, the referenced
//   // value (but not the address) is printed; for a (const or not) char
//   // pointer, the NUL-terminated string (but not the pointer) is
//   // printed.
//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
//
//   // Prints value using the type inferred by the compiler.  The difference
//   // from UniversalTersePrint() is that this function prints both the
//   // pointer and the NUL-terminated string for a (const or not) char pointer.
//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
//
//   // Prints the fields of a tuple tersely to a string vector, one
//   // element for each field. Tuple support must be enabled in
//   // gtest-port.h.
//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
//       const Tuple& value);
//
// Known limitation:
//
// The print primitives print the elements of an STL-style container
// using the compiler-inferred type of *iter where iter is a
// const_iterator of the container.  When const_iterator is an input
// iterator but not a forward iterator, this inferred type may not
// match value_type, and the print output may be incorrect.  In
// practice, this is rarely a problem as for most containers
// const_iterator is a forward iterator.  We'll fix this if there's an
// actual need for it.  Note that this fix cannot rely on value_type
// being defined as many user-defined container types don't have
// value_type.

// IWYU pragma: private, include "gtest/gtest.h"
// IWYU pragma: friend gtest/.*
// IWYU pragma: friend gmock/.*

#ifndef GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
#define GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_

#include <functional>
#include <memory>
#include <ostream>  // NOLINT
#include <sstream>
#include <string>
#include <tuple>
#include <type_traits>
#include <typeinfo>
#include <utility>
#include <vector>

#ifdef GTEST_HAS_ABSL
#include "absl/strings/internal/has_absl_stringify.h"
#include "absl/strings/str_cat.h"
#endif  // GTEST_HAS_ABSL
#include "gtest/internal/gtest-internal.h"
#include "gtest/internal/gtest-port.h"

namespace testing {

// Definitions in the internal* namespaces are subject to change without notice.
// DO NOT USE THEM IN USER CODE!
internal  // namespace internal

template <typename T>
::std::string PrintToString(const T& value) { … }

}  // namespace testing

// Include any custom printer added by the local installation.
// We must include this header at the end to make sure it can use the
// declarations from this file.
#include "gtest/internal/custom/gtest-printers.h"

#endif  // GOOGLETEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
llvm/third-party/unittest/googletest/include/gtest/gtest-printers.h
