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+// Copyright 2007, Google Inc.
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+// All rights reserved.
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+//
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+// Redistribution and use in source and binary forms, with or without
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+// modification, are permitted provided that the following conditions are
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+// met:
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+//
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+// * Redistributions of source code must retain the above copyright
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+// notice, this list of conditions and the following disclaimer.
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+// * Redistributions in binary form must reproduce the above
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+// copyright notice, this list of conditions and the following disclaimer
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+// in the documentation and/or other materials provided with the
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+// distribution.
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+// * Neither the name of Google Inc. nor the names of its
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+// contributors may be used to endorse or promote products derived from
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+// this software without specific prior written permission.
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+//
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+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+//
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+// Author: wan@google.com (Zhanyong Wan)
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+
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+// Google Test - The Google C++ Testing Framework
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+//
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+// This file implements a universal value printer that can print a
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+// value of any type T:
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+//
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+// void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
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+//
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+// A user can teach this function how to print a class type T by
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+// defining either operator<<() or PrintTo() in the namespace that
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+// defines T. More specifically, the FIRST defined function in the
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+// following list will be used (assuming T is defined in namespace
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+// foo):
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+//
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+// 1. foo::PrintTo(const T&, ostream*)
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+// 2. operator<<(ostream&, const T&) defined in either foo or the
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+// global namespace.
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+//
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+// If none of the above is defined, it will print the debug string of
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+// the value if it is a protocol buffer, or print the raw bytes in the
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+// value otherwise.
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+//
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+// To aid debugging: when T is a reference type, the address of the
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+// value is also printed; when T is a (const) char pointer, both the
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+// pointer value and the NUL-terminated string it points to are
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+// printed.
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+//
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+// We also provide some convenient wrappers:
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+//
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+// // Prints a value to a string. For a (const or not) char
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+// // pointer, the NUL-terminated string (but not the pointer) is
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+// // printed.
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+// std::string ::testing::PrintToString(const T& value);
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+//
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+// // Prints a value tersely: for a reference type, the referenced
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+// // value (but not the address) is printed; for a (const or not) char
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+// // pointer, the NUL-terminated string (but not the pointer) is
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+// // printed.
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+// void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
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+//
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+// // Prints value using the type inferred by the compiler. The difference
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+// // from UniversalTersePrint() is that this function prints both the
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+// // pointer and the NUL-terminated string for a (const or not) char pointer.
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+// void ::testing::internal::UniversalPrint(const T& value, ostream*);
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+//
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+// // Prints the fields of a tuple tersely to a string vector, one
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+// // element for each field. Tuple support must be enabled in
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+// // gtest-port.h.
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+// std::vector<string> UniversalTersePrintTupleFieldsToStrings(
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+// const Tuple& value);
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+//
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+// Known limitation:
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+//
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+// The print primitives print the elements of an STL-style container
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+// using the compiler-inferred type of *iter where iter is a
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+// const_iterator of the container. When const_iterator is an input
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+// iterator but not a forward iterator, this inferred type may not
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+// match value_type, and the print output may be incorrect. In
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+// practice, this is rarely a problem as for most containers
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+// const_iterator is a forward iterator. We'll fix this if there's an
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+// actual need for it. Note that this fix cannot rely on value_type
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+// being defined as many user-defined container types don't have
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+// value_type.
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+
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+#ifndef GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
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+#define GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
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+
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+#include <ostream> // NOLINT
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+#include <sstream>
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+#include <string>
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+#include <utility>
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+#include <vector>
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+#include "gtest/internal/gtest-port.h"
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+#include "gtest/internal/gtest-internal.h"
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+
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+namespace testing {
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+
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+// Definitions in the 'internal' and 'internal2' name spaces are
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+// subject to change without notice. DO NOT USE THEM IN USER CODE!
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+namespace internal2 {
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+
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+// Prints the given number of bytes in the given object to the given
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+// ostream.
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+GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
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+ size_t count,
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+ ::std::ostream* os);
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+
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+// For selecting which printer to use when a given type has neither <<
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+// nor PrintTo().
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+enum TypeKind {
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+ kProtobuf, // a protobuf type
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+ kConvertibleToInteger, // a type implicitly convertible to BiggestInt
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+ // (e.g. a named or unnamed enum type)
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+ kOtherType // anything else
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+};
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+
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+// TypeWithoutFormatter<T, kTypeKind>::PrintValue(value, os) is called
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+// by the universal printer to print a value of type T when neither
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+// operator<< nor PrintTo() is defined for T, where kTypeKind is the
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+// "kind" of T as defined by enum TypeKind.
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+template <typename T, TypeKind kTypeKind>
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+class TypeWithoutFormatter {
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+ public:
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+ // This default version is called when kTypeKind is kOtherType.
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+ static void PrintValue(const T& value, ::std::ostream* os) {
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+ PrintBytesInObjectTo(reinterpret_cast<const unsigned char*>(&value),
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+ sizeof(value), os);
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+ }
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+};
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+
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+// We print a protobuf using its ShortDebugString() when the string
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+// doesn't exceed this many characters; otherwise we print it using
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+// DebugString() for better readability.
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+const size_t kProtobufOneLinerMaxLength = 50;
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+
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+template <typename T>
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+class TypeWithoutFormatter<T, kProtobuf> {
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+ public:
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+ static void PrintValue(const T& value, ::std::ostream* os) {
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+ const ::testing::internal::string short_str = value.ShortDebugString();
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+ const ::testing::internal::string pretty_str =
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+ short_str.length() <= kProtobufOneLinerMaxLength ?
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+ short_str : ("\n" + value.DebugString());
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+ *os << ("<" + pretty_str + ">");
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+ }
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+};
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+
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+template <typename T>
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+class TypeWithoutFormatter<T, kConvertibleToInteger> {
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+ public:
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+ // Since T has no << operator or PrintTo() but can be implicitly
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+ // converted to BiggestInt, we print it as a BiggestInt.
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+ //
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+ // Most likely T is an enum type (either named or unnamed), in which
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+ // case printing it as an integer is the desired behavior. In case
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+ // T is not an enum, printing it as an integer is the best we can do
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+ // given that it has no user-defined printer.
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+ static void PrintValue(const T& value, ::std::ostream* os) {
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+ const internal::BiggestInt kBigInt = value;
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+ *os << kBigInt;
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+ }
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+};
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+
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+// Prints the given value to the given ostream. If the value is a
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+// protocol message, its debug string is printed; if it's an enum or
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+// of a type implicitly convertible to BiggestInt, it's printed as an
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+// integer; otherwise the bytes in the value are printed. This is
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+// what UniversalPrinter<T>::Print() does when it knows nothing about
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+// type T and T has neither << operator nor PrintTo().
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+//
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+// A user can override this behavior for a class type Foo by defining
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+// a << operator in the namespace where Foo is defined.
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+//
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+// We put this operator in namespace 'internal2' instead of 'internal'
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+// to simplify the implementation, as much code in 'internal' needs to
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+// use << in STL, which would conflict with our own << were it defined
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+// in 'internal'.
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+//
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+// Note that this operator<< takes a generic std::basic_ostream<Char,
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+// CharTraits> type instead of the more restricted std::ostream. If
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+// we define it to take an std::ostream instead, we'll get an
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+// "ambiguous overloads" compiler error when trying to print a type
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+// Foo that supports streaming to std::basic_ostream<Char,
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+// CharTraits>, as the compiler cannot tell whether
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+// operator<<(std::ostream&, const T&) or
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+// operator<<(std::basic_stream<Char, CharTraits>, const Foo&) is more
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+// specific.
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+template <typename Char, typename CharTraits, typename T>
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+::std::basic_ostream<Char, CharTraits>& operator<<(
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+ ::std::basic_ostream<Char, CharTraits>& os, const T& x) {
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+ TypeWithoutFormatter<T,
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+ (internal::IsAProtocolMessage<T>::value ? kProtobuf :
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+ internal::ImplicitlyConvertible<const T&, internal::BiggestInt>::value ?
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+ kConvertibleToInteger : kOtherType)>::PrintValue(x, &os);
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+ return os;
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+}
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+
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+} // namespace internal2
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+} // namespace testing
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+
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+// This namespace MUST NOT BE NESTED IN ::testing, or the name look-up
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+// magic needed for implementing UniversalPrinter won't work.
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+namespace testing_internal {
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+
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+// Used to print a value that is not an STL-style container when the
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+// user doesn't define PrintTo() for it.
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+template <typename T>
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+void DefaultPrintNonContainerTo(const T& value, ::std::ostream* os) {
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+ // With the following statement, during unqualified name lookup,
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+ // testing::internal2::operator<< appears as if it was declared in
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+ // the nearest enclosing namespace that contains both
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+ // ::testing_internal and ::testing::internal2, i.e. the global
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+ // namespace. For more details, refer to the C++ Standard section
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+ // 7.3.4-1 [namespace.udir]. This allows us to fall back onto
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+ // testing::internal2::operator<< in case T doesn't come with a <<
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+ // operator.
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+ //
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+ // We cannot write 'using ::testing::internal2::operator<<;', which
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+ // gcc 3.3 fails to compile due to a compiler bug.
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+ using namespace ::testing::internal2; // NOLINT
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+
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+ // Assuming T is defined in namespace foo, in the next statement,
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+ // the compiler will consider all of:
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+ //
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+ // 1. foo::operator<< (thanks to Koenig look-up),
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+ // 2. ::operator<< (as the current namespace is enclosed in ::),
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+ // 3. testing::internal2::operator<< (thanks to the using statement above).
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+ //
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+ // The operator<< whose type matches T best will be picked.
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+ //
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+ // We deliberately allow #2 to be a candidate, as sometimes it's
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+ // impossible to define #1 (e.g. when foo is ::std, defining
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+ // anything in it is undefined behavior unless you are a compiler
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+ // vendor.).
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+ *os << value;
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+}
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+
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+} // namespace testing_internal
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+
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+namespace testing {
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+namespace internal {
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+
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+// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
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+// value to the given ostream. The caller must ensure that
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+// 'ostream_ptr' is not NULL, or the behavior is undefined.
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+//
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+// We define UniversalPrinter as a class template (as opposed to a
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+// function template), as we need to partially specialize it for
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+// reference types, which cannot be done with function templates.
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+template <typename T>
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+class UniversalPrinter;
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+
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+template <typename T>
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+void UniversalPrint(const T& value, ::std::ostream* os);
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+
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+// Used to print an STL-style container when the user doesn't define
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+// a PrintTo() for it.
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+template <typename C>
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+void DefaultPrintTo(IsContainer /* dummy */,
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+ false_type /* is not a pointer */,
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+ const C& container, ::std::ostream* os) {
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+ const size_t kMaxCount = 32; // The maximum number of elements to print.
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+ *os << '{';
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+ size_t count = 0;
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+ for (typename C::const_iterator it = container.begin();
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+ it != container.end(); ++it, ++count) {
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+ if (count > 0) {
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+ *os << ',';
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+ if (count == kMaxCount) { // Enough has been printed.
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+ *os << " ...";
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+ break;
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+ }
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+ }
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+ *os << ' ';
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+ // We cannot call PrintTo(*it, os) here as PrintTo() doesn't
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+ // handle *it being a native array.
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+ internal::UniversalPrint(*it, os);
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+ }
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+
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+ if (count > 0) {
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+ *os << ' ';
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+ }
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+ *os << '}';
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+}
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+
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+// Used to print a pointer that is neither a char pointer nor a member
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+// pointer, when the user doesn't define PrintTo() for it. (A member
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+// variable pointer or member function pointer doesn't really point to
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+// a location in the address space. Their representation is
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+// implementation-defined. Therefore they will be printed as raw
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+// bytes.)
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+template <typename T>
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+void DefaultPrintTo(IsNotContainer /* dummy */,
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+ true_type /* is a pointer */,
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+ T* p, ::std::ostream* os) {
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+ if (p == NULL) {
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+ *os << "NULL";
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+ } else {
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+ // C++ doesn't allow casting from a function pointer to any object
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+ // pointer.
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+ //
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+ // IsTrue() silences warnings: "Condition is always true",
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+ // "unreachable code".
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+ if (IsTrue(ImplicitlyConvertible<T*, const void*>::value)) {
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+ // T is not a function type. We just call << to print p,
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+ // relying on ADL to pick up user-defined << for their pointer
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+ // types, if any.
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+ *os << p;
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+ } else {
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+ // T is a function type, so '*os << p' doesn't do what we want
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+ // (it just prints p as bool). We want to print p as a const
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+ // void*. However, we cannot cast it to const void* directly,
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+ // even using reinterpret_cast, as earlier versions of gcc
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+ // (e.g. 3.4.5) cannot compile the cast when p is a function
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+ // pointer. Casting to UInt64 first solves the problem.
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+ *os << reinterpret_cast<const void*>(
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+ reinterpret_cast<internal::UInt64>(p));
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+ }
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+ }
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+}
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+
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+// Used to print a non-container, non-pointer value when the user
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+// doesn't define PrintTo() for it.
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+template <typename T>
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+void DefaultPrintTo(IsNotContainer /* dummy */,
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+ false_type /* is not a pointer */,
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+ const T& value, ::std::ostream* os) {
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+ ::testing_internal::DefaultPrintNonContainerTo(value, os);
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+}
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+
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+// Prints the given value using the << operator if it has one;
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+// otherwise prints the bytes in it. This is what
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+// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
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+// or overloaded for type T.
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+//
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+// A user can override this behavior for a class type Foo by defining
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+// an overload of PrintTo() in the namespace where Foo is defined. We
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+// give the user this option as sometimes defining a << operator for
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+// Foo is not desirable (e.g. the coding style may prevent doing it,
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+// or there is already a << operator but it doesn't do what the user
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+// wants).
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+template <typename T>
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+void PrintTo(const T& value, ::std::ostream* os) {
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+ // DefaultPrintTo() is overloaded. The type of its first two
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+ // arguments determine which version will be picked. If T is an
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+ // STL-style container, the version for container will be called; if
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+ // T is a pointer, the pointer version will be called; otherwise the
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+ // generic version will be called.
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+ //
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+ // Note that we check for container types here, prior to we check
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+ // for protocol message types in our operator<<. The rationale is:
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+ //
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+ // For protocol messages, we want to give people a chance to
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+ // override Google Mock's format by defining a PrintTo() or
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+ // operator<<. For STL containers, other formats can be
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+ // incompatible with Google Mock's format for the container
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+ // elements; therefore we check for container types here to ensure
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+ // that our format is used.
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+ //
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+ // The second argument of DefaultPrintTo() is needed to bypass a bug
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+ // in Symbian's C++ compiler that prevents it from picking the right
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+ // overload between:
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+ //
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+ // PrintTo(const T& x, ...);
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+ // PrintTo(T* x, ...);
|
|
|
+ DefaultPrintTo(IsContainerTest<T>(0), is_pointer<T>(), value, os);
|
|
|
+}
|
|
|
+
|
|
|
+// The following list of PrintTo() overloads tells
|
|
|
+// UniversalPrinter<T>::Print() how to print standard types (built-in
|
|
|
+// types, strings, plain arrays, and pointers).
|
|
|
+
|
|
|
+// Overloads for various char types.
|
|
|
+GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
|
|
|
+GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
|
|
|
+inline void PrintTo(char c, ::std::ostream* os) {
|
|
|
+ // When printing a plain char, we always treat it as unsigned. This
|
|
|
+ // way, the output won't be affected by whether the compiler thinks
|
|
|
+ // char is signed or not.
|
|
|
+ PrintTo(static_cast<unsigned char>(c), os);
|
|
|
+}
|
|
|
+
|
|
|
+// Overloads for other simple built-in types.
|
|
|
+inline void PrintTo(bool x, ::std::ostream* os) {
|
|
|
+ *os << (x ? "true" : "false");
|
|
|
+}
|
|
|
+
|
|
|
+// Overload for wchar_t type.
|
|
|
+// Prints a wchar_t as a symbol if it is printable or as its internal
|
|
|
+// code otherwise and also as its decimal code (except for L'\0').
|
|
|
+// The L'\0' char is printed as "L'\\0'". The decimal code is printed
|
|
|
+// as signed integer when wchar_t is implemented by the compiler
|
|
|
+// as a signed type and is printed as an unsigned integer when wchar_t
|
|
|
+// is implemented as an unsigned type.
|
|
|
+GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
|
|
|
+
|
|
|
+// Overloads for C strings.
|
|
|
+GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
|
|
|
+inline void PrintTo(char* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const char*>(s), os);
|
|
|
+}
|
|
|
+
|
|
|
+// signed/unsigned char is often used for representing binary data, so
|
|
|
+// we print pointers to it as void* to be safe.
|
|
|
+inline void PrintTo(const signed char* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const void*>(s), os);
|
|
|
+}
|
|
|
+inline void PrintTo(signed char* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const void*>(s), os);
|
|
|
+}
|
|
|
+inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const void*>(s), os);
|
|
|
+}
|
|
|
+inline void PrintTo(unsigned char* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const void*>(s), os);
|
|
|
+}
|
|
|
+
|
|
|
+// MSVC can be configured to define wchar_t as a typedef of unsigned
|
|
|
+// short. It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
|
|
|
+// type. When wchar_t is a typedef, defining an overload for const
|
|
|
+// wchar_t* would cause unsigned short* be printed as a wide string,
|
|
|
+// possibly causing invalid memory accesses.
|
|
|
+#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
|
|
|
+// Overloads for wide C strings
|
|
|
+GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
|
|
|
+inline void PrintTo(wchar_t* s, ::std::ostream* os) {
|
|
|
+ PrintTo(ImplicitCast_<const wchar_t*>(s), os);
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+// Overload for C arrays. Multi-dimensional arrays are printed
|
|
|
+// properly.
|
|
|
+
|
|
|
+// Prints the given number of elements in an array, without printing
|
|
|
+// the curly braces.
|
|
|
+template <typename T>
|
|
|
+void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
|
|
|
+ UniversalPrint(a[0], os);
|
|
|
+ for (size_t i = 1; i != count; i++) {
|
|
|
+ *os << ", ";
|
|
|
+ UniversalPrint(a[i], os);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+// Overloads for ::string and ::std::string.
|
|
|
+#if GTEST_HAS_GLOBAL_STRING
|
|
|
+GTEST_API_ void PrintStringTo(const ::string&s, ::std::ostream* os);
|
|
|
+inline void PrintTo(const ::string& s, ::std::ostream* os) {
|
|
|
+ PrintStringTo(s, os);
|
|
|
+}
|
|
|
+#endif // GTEST_HAS_GLOBAL_STRING
|
|
|
+
|
|
|
+GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
|
|
|
+inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
|
|
|
+ PrintStringTo(s, os);
|
|
|
+}
|
|
|
+
|
|
|
+// Overloads for ::wstring and ::std::wstring.
|
|
|
+#if GTEST_HAS_GLOBAL_WSTRING
|
|
|
+GTEST_API_ void PrintWideStringTo(const ::wstring&s, ::std::ostream* os);
|
|
|
+inline void PrintTo(const ::wstring& s, ::std::ostream* os) {
|
|
|
+ PrintWideStringTo(s, os);
|
|
|
+}
|
|
|
+#endif // GTEST_HAS_GLOBAL_WSTRING
|
|
|
+
|
|
|
+#if GTEST_HAS_STD_WSTRING
|
|
|
+GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
|
|
|
+inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
|
|
|
+ PrintWideStringTo(s, os);
|
|
|
+}
|
|
|
+#endif // GTEST_HAS_STD_WSTRING
|
|
|
+
|
|
|
+#if GTEST_HAS_TR1_TUPLE
|
|
|
+// Overload for ::std::tr1::tuple. Needed for printing function arguments,
|
|
|
+// which are packed as tuples.
|
|
|
+
|
|
|
+// 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);
|
|
|
+
|
|
|
+// 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);
|
|
|
+}
|
|
|
+#endif // GTEST_HAS_TR1_TUPLE
|
|
|
+
|
|
|
+// Overload for std::pair.
|
|
|
+template <typename T1, typename T2>
|
|
|
+void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
|
|
|
+ *os << '(';
|
|
|
+ // We cannot use UniversalPrint(value.first, os) here, as T1 may be
|
|
|
+ // a reference type. The same for printing value.second.
|
|
|
+ UniversalPrinter<T1>::Print(value.first, os);
|
|
|
+ *os << ", ";
|
|
|
+ UniversalPrinter<T2>::Print(value.second, os);
|
|
|
+ *os << ')';
|
|
|
+}
|
|
|
+
|
|
|
+// Implements printing a non-reference type T by letting the compiler
|
|
|
+// pick the right overload of PrintTo() for T.
|
|
|
+template <typename T>
|
|
|
+class UniversalPrinter {
|
|
|
+ public:
|
|
|
+ // MSVC warns about adding const to a function type, so we want to
|
|
|
+ // disable the warning.
|
|
|
+#ifdef _MSC_VER
|
|
|
+# pragma warning(push) // Saves the current warning state.
|
|
|
+# pragma warning(disable:4180) // Temporarily disables warning 4180.
|
|
|
+#endif // _MSC_VER
|
|
|
+
|
|
|
+ // Note: we deliberately don't call this PrintTo(), as that name
|
|
|
+ // conflicts with ::testing::internal::PrintTo in the body of the
|
|
|
+ // function.
|
|
|
+ static void Print(const T& value, ::std::ostream* os) {
|
|
|
+ // By default, ::testing::internal::PrintTo() is used for printing
|
|
|
+ // the value.
|
|
|
+ //
|
|
|
+ // Thanks to Koenig look-up, if T is a class and has its own
|
|
|
+ // PrintTo() function defined in its namespace, that function will
|
|
|
+ // be visible here. Since it is more specific than the generic ones
|
|
|
+ // in ::testing::internal, it will be picked by the compiler in the
|
|
|
+ // following statement - exactly what we want.
|
|
|
+ PrintTo(value, os);
|
|
|
+ }
|
|
|
+
|
|
|
+#ifdef _MSC_VER
|
|
|
+# pragma warning(pop) // Restores the warning state.
|
|
|
+#endif // _MSC_VER
|
|
|
+};
|
|
|
+
|
|
|
+// UniversalPrintArray(begin, len, os) prints an array of 'len'
|
|
|
+// elements, starting at address 'begin'.
|
|
|
+template <typename T>
|
|
|
+void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
|
|
|
+ if (len == 0) {
|
|
|
+ *os << "{}";
|
|
|
+ } else {
|
|
|
+ *os << "{ ";
|
|
|
+ const size_t kThreshold = 18;
|
|
|
+ const size_t kChunkSize = 8;
|
|
|
+ // If the array has more than kThreshold elements, we'll have to
|
|
|
+ // omit some details by printing only the first and the last
|
|
|
+ // kChunkSize elements.
|
|
|
+ // TODO(wan@google.com): let the user control the threshold using a flag.
|
|
|
+ if (len <= kThreshold) {
|
|
|
+ PrintRawArrayTo(begin, len, os);
|
|
|
+ } else {
|
|
|
+ PrintRawArrayTo(begin, kChunkSize, os);
|
|
|
+ *os << ", ..., ";
|
|
|
+ PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
|
|
|
+ }
|
|
|
+ *os << " }";
|
|
|
+ }
|
|
|
+}
|
|
|
+// This overload prints a (const) char array compactly.
|
|
|
+GTEST_API_ void UniversalPrintArray(
|
|
|
+ const char* begin, size_t len, ::std::ostream* os);
|
|
|
+
|
|
|
+// This overload prints a (const) wchar_t array compactly.
|
|
|
+GTEST_API_ void UniversalPrintArray(
|
|
|
+ const wchar_t* begin, size_t len, ::std::ostream* os);
|
|
|
+
|
|
|
+// Implements printing an array type T[N].
|
|
|
+template <typename T, size_t N>
|
|
|
+class UniversalPrinter<T[N]> {
|
|
|
+ public:
|
|
|
+ // Prints the given array, omitting some elements when there are too
|
|
|
+ // many.
|
|
|
+ static void Print(const T (&a)[N], ::std::ostream* os) {
|
|
|
+ UniversalPrintArray(a, N, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+// Implements printing a reference type T&.
|
|
|
+template <typename T>
|
|
|
+class UniversalPrinter<T&> {
|
|
|
+ public:
|
|
|
+ // MSVC warns about adding const to a function type, so we want to
|
|
|
+ // disable the warning.
|
|
|
+#ifdef _MSC_VER
|
|
|
+# pragma warning(push) // Saves the current warning state.
|
|
|
+# pragma warning(disable:4180) // Temporarily disables warning 4180.
|
|
|
+#endif // _MSC_VER
|
|
|
+
|
|
|
+ static void Print(const T& value, ::std::ostream* os) {
|
|
|
+ // Prints the address of the value. We use reinterpret_cast here
|
|
|
+ // as static_cast doesn't compile when T is a function type.
|
|
|
+ *os << "@" << reinterpret_cast<const void*>(&value) << " ";
|
|
|
+
|
|
|
+ // Then prints the value itself.
|
|
|
+ UniversalPrint(value, os);
|
|
|
+ }
|
|
|
+
|
|
|
+#ifdef _MSC_VER
|
|
|
+# pragma warning(pop) // Restores the warning state.
|
|
|
+#endif // _MSC_VER
|
|
|
+};
|
|
|
+
|
|
|
+// Prints a value tersely: for a reference type, the referenced value
|
|
|
+// (but not the address) is printed; for a (const) char pointer, the
|
|
|
+// NUL-terminated string (but not the pointer) is printed.
|
|
|
+
|
|
|
+template <typename T>
|
|
|
+class UniversalTersePrinter {
|
|
|
+ public:
|
|
|
+ static void Print(const T& value, ::std::ostream* os) {
|
|
|
+ UniversalPrint(value, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+template <typename T>
|
|
|
+class UniversalTersePrinter<T&> {
|
|
|
+ public:
|
|
|
+ static void Print(const T& value, ::std::ostream* os) {
|
|
|
+ UniversalPrint(value, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+template <typename T, size_t N>
|
|
|
+class UniversalTersePrinter<T[N]> {
|
|
|
+ public:
|
|
|
+ static void Print(const T (&value)[N], ::std::ostream* os) {
|
|
|
+ UniversalPrinter<T[N]>::Print(value, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+template <>
|
|
|
+class UniversalTersePrinter<const char*> {
|
|
|
+ public:
|
|
|
+ static void Print(const char* str, ::std::ostream* os) {
|
|
|
+ if (str == NULL) {
|
|
|
+ *os << "NULL";
|
|
|
+ } else {
|
|
|
+ UniversalPrint(string(str), os);
|
|
|
+ }
|
|
|
+ }
|
|
|
+};
|
|
|
+template <>
|
|
|
+class UniversalTersePrinter<char*> {
|
|
|
+ public:
|
|
|
+ static void Print(char* str, ::std::ostream* os) {
|
|
|
+ UniversalTersePrinter<const char*>::Print(str, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+#if GTEST_HAS_STD_WSTRING
|
|
|
+template <>
|
|
|
+class UniversalTersePrinter<const wchar_t*> {
|
|
|
+ public:
|
|
|
+ static void Print(const wchar_t* str, ::std::ostream* os) {
|
|
|
+ if (str == NULL) {
|
|
|
+ *os << "NULL";
|
|
|
+ } else {
|
|
|
+ UniversalPrint(::std::wstring(str), os);
|
|
|
+ }
|
|
|
+ }
|
|
|
+};
|
|
|
+#endif
|
|
|
+
|
|
|
+template <>
|
|
|
+class UniversalTersePrinter<wchar_t*> {
|
|
|
+ public:
|
|
|
+ static void Print(wchar_t* str, ::std::ostream* os) {
|
|
|
+ UniversalTersePrinter<const wchar_t*>::Print(str, os);
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+template <typename T>
|
|
|
+void UniversalTersePrint(const T& value, ::std::ostream* os) {
|
|
|
+ UniversalTersePrinter<T>::Print(value, os);
|
|
|
+}
|
|
|
+
|
|
|
+// Prints a value using the type inferred by the compiler. The
|
|
|
+// difference between this and UniversalTersePrint() is that for a
|
|
|
+// (const) char pointer, this prints both the pointer and the
|
|
|
+// NUL-terminated string.
|
|
|
+template <typename T>
|
|
|
+void UniversalPrint(const T& value, ::std::ostream* os) {
|
|
|
+ // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
|
|
|
+ // UniversalPrinter with T directly.
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+ typedef T T1;
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+ UniversalPrinter<T1>::Print(value, os);
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+}
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+
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+#if GTEST_HAS_TR1_TUPLE
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+typedef ::std::vector<string> Strings;
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+
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+// This helper template allows PrintTo() for tuples and
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+// UniversalTersePrintTupleFieldsToStrings() to be defined by
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+// induction on the number of tuple fields. The idea is that
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+// TuplePrefixPrinter<N>::PrintPrefixTo(t, os) prints the first N
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+// fields in tuple t, and can be defined in terms of
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+// TuplePrefixPrinter<N - 1>.
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+
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+// The inductive case.
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+template <size_t N>
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+struct TuplePrefixPrinter {
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+ // Prints the first N fields of a tuple.
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+ template <typename Tuple>
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+ static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
|
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+ TuplePrefixPrinter<N - 1>::PrintPrefixTo(t, os);
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+ *os << ", ";
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+ UniversalPrinter<typename ::std::tr1::tuple_element<N - 1, Tuple>::type>
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+ ::Print(::std::tr1::get<N - 1>(t), os);
|
|
|
+ }
|
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+
|
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+ // 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(::std::tr1::get<N - 1>(t), &ss);
|
|
|
+ strings->push_back(ss.str());
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+// Base cases.
|
|
|
+template <>
|
|
|
+struct TuplePrefixPrinter<0> {
|
|
|
+ template <typename Tuple>
|
|
|
+ static void PrintPrefixTo(const Tuple&, ::std::ostream*) {}
|
|
|
+
|
|
|
+ template <typename Tuple>
|
|
|
+ static void TersePrintPrefixToStrings(const Tuple&, Strings*) {}
|
|
|
+};
|
|
|
+// We have to specialize the entire TuplePrefixPrinter<> class
|
|
|
+// template here, even though the definition of
|
|
|
+// TersePrintPrefixToStrings() is the same as the generic version, as
|
|
|
+// Embarcadero (formerly CodeGear, formerly Borland) C++ doesn't
|
|
|
+// support specializing a method template of a class template.
|
|
|
+template <>
|
|
|
+struct TuplePrefixPrinter<1> {
|
|
|
+ template <typename Tuple>
|
|
|
+ static void PrintPrefixTo(const Tuple& t, ::std::ostream* os) {
|
|
|
+ UniversalPrinter<typename ::std::tr1::tuple_element<0, Tuple>::type>::
|
|
|
+ Print(::std::tr1::get<0>(t), os);
|
|
|
+ }
|
|
|
+
|
|
|
+ template <typename Tuple>
|
|
|
+ static void TersePrintPrefixToStrings(const Tuple& t, Strings* strings) {
|
|
|
+ ::std::stringstream ss;
|
|
|
+ UniversalTersePrint(::std::tr1::get<0>(t), &ss);
|
|
|
+ strings->push_back(ss.str());
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+// 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) {
|
|
|
+ *os << "(";
|
|
|
+ TuplePrefixPrinter< ::std::tr1::tuple_size<T>::value>::
|
|
|
+ PrintPrefixTo(t, os);
|
|
|
+ *os << ")";
|
|
|
+}
|
|
|
+
|
|
|
+// Prints the fields of a tuple tersely to a string vector, one
|
|
|
+// element for each field. See the comment before
|
|
|
+// UniversalTersePrint() for how we define "tersely".
|
|
|
+template <typename Tuple>
|
|
|
+Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
|
|
|
+ Strings result;
|
|
|
+ TuplePrefixPrinter< ::std::tr1::tuple_size<Tuple>::value>::
|
|
|
+ TersePrintPrefixToStrings(value, &result);
|
|
|
+ return result;
|
|
|
+}
|
|
|
+#endif // GTEST_HAS_TR1_TUPLE
|
|
|
+
|
|
|
+} // namespace internal
|
|
|
+
|
|
|
+template <typename T>
|
|
|
+::std::string PrintToString(const T& value) {
|
|
|
+ ::std::stringstream ss;
|
|
|
+ internal::UniversalTersePrinter<T>::Print(value, &ss);
|
|
|
+ return ss.str();
|
|
|
+}
|
|
|
+
|
|
|
+} // namespace testing
|
|
|
+
|
|
|
+#endif // GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
|