CbC/CbC_llvm: utils/unittest/googletest/include/gtest/gtest-printers.h comparison

comparison utils/unittest/googletest/include/gtest/gtest-printers.h @ 0:95c75e76d11b LLVM3.4

LLVM 3.4

author	Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date	Thu, 12 Dec 2013 13:56:28 +0900
parents
children	803732b1fca8

comparison

equal deleted inserted replaced

--1:000000000000
+:95c75e76d11b
+// Copyright 2007, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: wan@google.com (Zhanyong Wan)
+// Google Test - The Google C++ Testing 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.
+//
+// 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.
+#ifndef GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
+#define GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
+#include <ostream>  // NOLINT
+#include <sstream>
+#include <string>
+#include <utility>
+#include <vector>
+#include "gtest/internal/gtest-port.h"
+#include "gtest/internal/gtest-internal.h"
+namespace testing {
+// Definitions in the 'internal' and 'internal2' name spaces are
+// subject to change without notice.  DO NOT USE THEM IN USER CODE!
+namespace internal2 {
+// Prints the given number of bytes in the given object to the given
+// ostream.
+GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
+size_t count,
+::std::ostream* os);
+// For selecting which printer to use when a given type has neither <<
+// nor PrintTo().
+enum TypeKind {
+kProtobuf,              // a protobuf type
+kConvertibleToInteger,  // a type implicitly convertible to BiggestInt
+// (e.g. a named or unnamed enum type)
+kOtherType              // anything else
+};
+// TypeWithoutFormatter<T, kTypeKind>::PrintValue(value, os) is called
+// by the universal printer to print a value of type T when neither
+// operator<< nor PrintTo() is defined for T, where kTypeKind is the
+// "kind" of T as defined by enum TypeKind.
+template <typename T, TypeKind kTypeKind>
+class TypeWithoutFormatter {
+public:
+// This default version is called when kTypeKind is kOtherType.
+static void PrintValue(const T& value, ::std::ostream* os) {
+PrintBytesInObjectTo(reinterpret_cast<const unsigned char*>(&value),
+sizeof(value), os);
+}
+};
+// We print a protobuf using its ShortDebugString() when the string
+// doesn't exceed this many characters; otherwise we print it using
+// DebugString() for better readability.
+const size_t kProtobufOneLinerMaxLength = 50;
+template <typename T>
+class TypeWithoutFormatter<T, kProtobuf> {
+public:
+static void PrintValue(const T& value, ::std::ostream* os) {
+const ::testing::internal::string short_str = value.ShortDebugString();
+const ::testing::internal::string pretty_str =
+short_str.length() <= kProtobufOneLinerMaxLength ?
+short_str : ("\n" + value.DebugString());
+*os << ("<" + pretty_str + ">");
+}
+};
+template <typename T>
+class TypeWithoutFormatter<T, kConvertibleToInteger> {
+public:
+// Since T has no << operator or PrintTo() but can be implicitly
+// converted to BiggestInt, we print it as a BiggestInt.
+//
+// Most likely T is an enum type (either named or unnamed), in which
+// case printing it as an integer is the desired behavior.  In case
+// T is not an enum, printing it as an integer is the best we can do
+// given that it has no user-defined printer.
+static void PrintValue(const T& value, ::std::ostream* os) {
+const internal::BiggestInt kBigInt = value;
+*os << kBigInt;
+}
+};
+// Prints the given value to the given ostream.  If the value is a
+// protocol message, its debug string is printed; if it's an enum or
+// of a type implicitly convertible to BiggestInt, it's printed as an
+// integer; otherwise the bytes in the value are printed.  This is
+// what UniversalPrinter<T>::Print() does when it knows nothing about
+// type T and T has neither << operator nor PrintTo().
+//
+// A user can override this behavior for a class type Foo by defining
+// a << operator in the namespace where Foo is defined.
+//
+// We put this operator in namespace 'internal2' instead of 'internal'
+// to simplify the implementation, as much code in 'internal' needs to
+// use << in STL, which would conflict with our own << were it defined
+// in 'internal'.
+//
+// Note that this operator<< takes a generic std::basic_ostream<Char,
+// CharTraits> type instead of the more restricted std::ostream.  If
+// we define it to take an std::ostream instead, we'll get an
+// "ambiguous overloads" compiler error when trying to print a type
+// Foo that supports streaming to std::basic_ostream<Char,
+// CharTraits>, as the compiler cannot tell whether
+// operator<<(std::ostream&, const T&) or
+// operator<<(std::basic_stream<Char, CharTraits>, const Foo&) is more
+// specific.
+template <typename Char, typename CharTraits, typename T>
+::std::basic_ostream<Char, CharTraits>& operator<<(
+::std::basic_ostream<Char, CharTraits>& os, const T& x) {
+TypeWithoutFormatter<T,
+(internal::IsAProtocolMessage<T>::value ? kProtobuf :
+internal::ImplicitlyConvertible<const T&, internal::BiggestInt>::value ?
+kConvertibleToInteger : kOtherType)>::PrintValue(x, &os);
+return os;
+}
+}  // namespace internal2
+}  // namespace testing
+// This namespace MUST NOT BE NESTED IN ::testing, or the name look-up
+// magic needed for implementing UniversalPrinter won't work.
+namespace testing_internal {
+// Used to print a value that is not an STL-style container when the
+// user doesn't define PrintTo() for it.
+template <typename T>
+void DefaultPrintNonContainerTo(const T& value, ::std::ostream* os) {
+// With the following statement, during unqualified name lookup,
+// testing::internal2::operator<< appears as if it was declared in
+// the nearest enclosing namespace that contains both
+// ::testing_internal and ::testing::internal2, i.e. the global
+// namespace.  For more details, refer to the C++ Standard section
+// 7.3.4-1 [namespace.udir].  This allows us to fall back onto
+// testing::internal2::operator<< in case T doesn't come with a <<
+// operator.
+//
+// We cannot write 'using ::testing::internal2::operator<<;', which
+// gcc 3.3 fails to compile due to a compiler bug.
+using namespace ::testing::internal2;  // NOLINT
+// Assuming T is defined in namespace foo, in the next statement,
+// the compiler will consider all of:
+//
+//   1. foo::operator<< (thanks to Koenig look-up),
+//   2. ::operator<< (as the current namespace is enclosed in ::),
+//   3. testing::internal2::operator<< (thanks to the using statement above).
+//
+// The operator<< whose type matches T best will be picked.
+//
+// We deliberately allow #2 to be a candidate, as sometimes it's
+// impossible to define #1 (e.g. when foo is ::std, defining
+// anything in it is undefined behavior unless you are a compiler
+// vendor.).
+*os << value;
+}
+}  // namespace testing_internal
+namespace testing {
+namespace internal {
+// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
+// value to the given ostream.  The caller must ensure that
+// 'ostream_ptr' is not NULL, or the behavior is undefined.
+//
+// We define UniversalPrinter as a class template (as opposed to a
+// function template), as we need to partially specialize it for
+// reference types, which cannot be done with function templates.
+template <typename T>
+class UniversalPrinter;
+template <typename T>
+void UniversalPrint(const T& value, ::std::ostream* os);
+// Used to print an STL-style container when the user doesn't define
+// a PrintTo() for it.
+template <typename C>
+void DefaultPrintTo(IsContainer /* dummy */,
+false_type /* is not a pointer */,
+const C& container, ::std::ostream* os) {
+const size_t kMaxCount = 32;  // The maximum number of elements to print.
+*os << '{';
+size_t count = 0;
+for (typename C::const_iterator it = container.begin();
+it != container.end(); ++it, ++count) {
+if (count > 0) {
+*os << ',';
+if (count == kMaxCount) {  // Enough has been printed.
+*os << " ...";
+break;
+}
+}
+*os << ' ';
+// We cannot call PrintTo(*it, os) here as PrintTo() doesn't
+// handle *it being a native array.
+internal::UniversalPrint(*it, os);
+}
+if (count > 0) {
+*os << ' ';
+}
+*os << '}';
+}
+// Used to print a pointer that is neither a char pointer nor a member
+// pointer, when the user doesn't define PrintTo() for it.  (A member
+// variable pointer or member function pointer doesn't really point to
+// a location in the address space.  Their representation is
+// implementation-defined.  Therefore they will be printed as raw
+// bytes.)
+template <typename T>
+void DefaultPrintTo(IsNotContainer /* dummy */,
+true_type /* is a pointer */,
+T* p, ::std::ostream* os) {
+if (p == NULL) {
+*os << "NULL";
+} else {
+// C++ doesn't allow casting from a function pointer to any object
+// pointer.
+//
+// IsTrue() silences warnings: "Condition is always true",
+// "unreachable code".
+if (IsTrue(ImplicitlyConvertible<T*, const void*>::value)) {
+// T is not a function type.  We just call << to print p,
+// relying on ADL to pick up user-defined << for their pointer
+// types, if any.
+*os << p;
+} else {
+// T is a function type, so '*os << p' doesn't do what we want
+// (it just prints p as bool).  We want to print p as a const
+// void*.  However, we cannot cast it to const void* directly,
+// even using reinterpret_cast, as earlier versions of gcc
+// (e.g. 3.4.5) cannot compile the cast when p is a function
+// pointer.  Casting to UInt64 first solves the problem.
+*os << reinterpret_cast<const void*>(
+reinterpret_cast<internal::UInt64>(p));
+}
+}
+}
+// Used to print a non-container, non-pointer value when the user
+// doesn't define PrintTo() for it.
+template <typename T>
+void DefaultPrintTo(IsNotContainer /* dummy */,
+false_type /* is not a pointer */,
+const T& value, ::std::ostream* os) {
+::testing_internal::DefaultPrintNonContainerTo(value, os);
+}
+// Prints the given value using the << operator if it has one;
+// otherwise prints the bytes in it.  This is what
+// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
+// or overloaded for type T.
+//
+// A user can override this behavior for a class type Foo by defining
+// an overload of PrintTo() in the namespace where Foo is defined.  We
+// give the user this option as sometimes defining a << operator for
+// Foo is not desirable (e.g. the coding style may prevent doing it,
+// or there is already a << operator but it doesn't do what the user
+// wants).
+template <typename T>
+void PrintTo(const T& value, ::std::ostream* os) {
+// DefaultPrintTo() is overloaded.  The type of its first two
+// arguments determine which version will be picked.  If T is an
+// STL-style container, the version for container will be called; if
+// T is a pointer, the pointer version will be called; otherwise the
+// generic version will be called.
+//
+// Note that we check for container types here, prior to we check
+// for protocol message types in our operator<<.  The rationale is:
+//
+// For protocol messages, we want to give people a chance to
+// override Google Mock's format by defining a PrintTo() or
+// operator<<.  For STL containers, other formats can be
+// incompatible with Google Mock's format for the container
+// elements; therefore we check for container types here to ensure
+// that our format is used.
+//
+// The second argument of DefaultPrintTo() is needed to bypass a bug
+// in Symbian's C++ compiler that prevents it from picking the right
+// overload between:
+//
+//   PrintTo(const T& x, ...);
+//   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);
+// 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>
+void UniversalTersePrint(const T& value, ::std::ostream* os) {
+UniversalPrint(value, os);
+}
+inline void UniversalTersePrint(const char* str, ::std::ostream* os) {
+if (str == NULL) {
+*os << "NULL";
+} else {
+UniversalPrint(string(str), os);
+}
+}
+inline void UniversalTersePrint(char* str, ::std::ostream* os) {
+UniversalTersePrint(static_cast<const char*>(str), 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) {
+UniversalPrinter<T>::Print(value, os);
+}
+#if GTEST_HAS_TR1_TUPLE
+typedef ::std::vector<string> Strings;
+// 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);
+*os << ", ";
+UniversalPrinter<typename ::std::tr1::tuple_element<N - 1, Tuple>::type>
+::Print(::std::tr1::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(::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::UniversalTersePrint(value, &ss);
+return ss.str();
+}
+}  // namespace testing
+#endif  // GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_

Mercurial > hg > CbC > CbC_llvm

comparison utils/unittest/googletest/include/gtest/gtest-printers.h @ 0:95c75e76d11b LLVM3.4