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339 lines
9.0 KiB
339 lines
9.0 KiB
$$ -*- mode: c++; -*- |
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$var n = 10 $$ Maximum number of tuple fields we want to support. |
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$$ This meta comment fixes auto-indentation in Emacs. }} |
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// Copyright 2009 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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// Implements a subset of TR1 tuple needed by Google Test and Google Mock. |
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#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TUPLE_H_ |
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#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TUPLE_H_ |
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#include <utility> // For ::std::pair. |
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// The compiler used in Symbian has a bug that prevents us from declaring the |
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// tuple template as a friend (it complains that tuple is redefined). This |
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// hack bypasses the bug by declaring the members that should otherwise be |
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// private as public. |
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// Sun Studio versions < 12 also have the above bug. |
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#if defined(__SYMBIAN32__) || (defined(__SUNPRO_CC) && __SUNPRO_CC < 0x590) |
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# define GTEST_DECLARE_TUPLE_AS_FRIEND_ public: |
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#else |
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# define GTEST_DECLARE_TUPLE_AS_FRIEND_ \ |
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template <GTEST_$(n)_TYPENAMES_(U)> friend class tuple; \ |
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private: |
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#endif |
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$range i 0..n-1 |
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$range j 0..n |
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$range k 1..n |
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// GTEST_n_TUPLE_(T) is the type of an n-tuple. |
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#define GTEST_0_TUPLE_(T) tuple<> |
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$for k [[ |
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$range m 0..k-1 |
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$range m2 k..n-1 |
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#define GTEST_$(k)_TUPLE_(T) tuple<$for m, [[T##$m]]$for m2 [[, void]]> |
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]] |
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// GTEST_n_TYPENAMES_(T) declares a list of n typenames. |
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$for j [[ |
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$range m 0..j-1 |
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#define GTEST_$(j)_TYPENAMES_(T) $for m, [[typename T##$m]] |
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]] |
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// In theory, defining stuff in the ::std namespace is undefined |
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// behavior. We can do this as we are playing the role of a standard |
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// library vendor. |
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namespace std { |
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namespace tr1 { |
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template <$for i, [[typename T$i = void]]> |
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class tuple; |
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// Anything in namespace gtest_internal is Google Test's INTERNAL |
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// IMPLEMENTATION DETAIL and MUST NOT BE USED DIRECTLY in user code. |
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namespace gtest_internal { |
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// ByRef<T>::type is T if T is a reference; otherwise it's const T&. |
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template <typename T> |
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struct ByRef { typedef const T& type; }; // NOLINT |
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template <typename T> |
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struct ByRef<T&> { typedef T& type; }; // NOLINT |
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// A handy wrapper for ByRef. |
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#define GTEST_BY_REF_(T) typename ::std::tr1::gtest_internal::ByRef<T>::type |
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// AddRef<T>::type is T if T is a reference; otherwise it's T&. This |
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// is the same as tr1::add_reference<T>::type. |
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template <typename T> |
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struct AddRef { typedef T& type; }; // NOLINT |
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template <typename T> |
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struct AddRef<T&> { typedef T& type; }; // NOLINT |
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// A handy wrapper for AddRef. |
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#define GTEST_ADD_REF_(T) typename ::std::tr1::gtest_internal::AddRef<T>::type |
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// A helper for implementing get<k>(). |
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template <int k> class Get; |
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// A helper for implementing tuple_element<k, T>. kIndexValid is true |
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// iff k < the number of fields in tuple type T. |
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template <bool kIndexValid, int kIndex, class Tuple> |
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struct TupleElement; |
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$for i [[ |
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template <GTEST_$(n)_TYPENAMES_(T)> |
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struct TupleElement<true, $i, GTEST_$(n)_TUPLE_(T) > { |
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typedef T$i type; |
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}; |
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]] |
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} // namespace gtest_internal |
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template <> |
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class tuple<> { |
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public: |
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tuple() {} |
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tuple(const tuple& /* t */) {} |
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tuple& operator=(const tuple& /* t */) { return *this; } |
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}; |
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$for k [[ |
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$range m 0..k-1 |
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template <GTEST_$(k)_TYPENAMES_(T)> |
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class $if k < n [[GTEST_$(k)_TUPLE_(T)]] $else [[tuple]] { |
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public: |
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template <int k> friend class gtest_internal::Get; |
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tuple() : $for m, [[f$(m)_()]] {} |
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explicit tuple($for m, [[GTEST_BY_REF_(T$m) f$m]]) : [[]] |
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$for m, [[f$(m)_(f$m)]] {} |
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tuple(const tuple& t) : $for m, [[f$(m)_(t.f$(m)_)]] {} |
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template <GTEST_$(k)_TYPENAMES_(U)> |
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tuple(const GTEST_$(k)_TUPLE_(U)& t) : $for m, [[f$(m)_(t.f$(m)_)]] {} |
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$if k == 2 [[ |
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template <typename U0, typename U1> |
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tuple(const ::std::pair<U0, U1>& p) : f0_(p.first), f1_(p.second) {} |
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]] |
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tuple& operator=(const tuple& t) { return CopyFrom(t); } |
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template <GTEST_$(k)_TYPENAMES_(U)> |
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tuple& operator=(const GTEST_$(k)_TUPLE_(U)& t) { |
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return CopyFrom(t); |
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} |
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$if k == 2 [[ |
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template <typename U0, typename U1> |
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tuple& operator=(const ::std::pair<U0, U1>& p) { |
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f0_ = p.first; |
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f1_ = p.second; |
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return *this; |
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} |
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]] |
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GTEST_DECLARE_TUPLE_AS_FRIEND_ |
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template <GTEST_$(k)_TYPENAMES_(U)> |
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tuple& CopyFrom(const GTEST_$(k)_TUPLE_(U)& t) { |
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$for m [[ |
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f$(m)_ = t.f$(m)_; |
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]] |
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return *this; |
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} |
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$for m [[ |
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T$m f$(m)_; |
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]] |
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}; |
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]] |
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// 6.1.3.2 Tuple creation functions. |
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// Known limitations: we don't support passing an |
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// std::tr1::reference_wrapper<T> to make_tuple(). And we don't |
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// implement tie(). |
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inline tuple<> make_tuple() { return tuple<>(); } |
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$for k [[ |
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$range m 0..k-1 |
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template <GTEST_$(k)_TYPENAMES_(T)> |
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inline GTEST_$(k)_TUPLE_(T) make_tuple($for m, [[const T$m& f$m]]) { |
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return GTEST_$(k)_TUPLE_(T)($for m, [[f$m]]); |
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} |
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]] |
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// 6.1.3.3 Tuple helper classes. |
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template <typename Tuple> struct tuple_size; |
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$for j [[ |
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template <GTEST_$(j)_TYPENAMES_(T)> |
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struct tuple_size<GTEST_$(j)_TUPLE_(T) > { |
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static const int value = $j; |
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}; |
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]] |
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template <int k, class Tuple> |
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struct tuple_element { |
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typedef typename gtest_internal::TupleElement< |
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k < (tuple_size<Tuple>::value), k, Tuple>::type type; |
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}; |
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#define GTEST_TUPLE_ELEMENT_(k, Tuple) typename tuple_element<k, Tuple >::type |
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// 6.1.3.4 Element access. |
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namespace gtest_internal { |
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$for i [[ |
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template <> |
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class Get<$i> { |
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public: |
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template <class Tuple> |
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static GTEST_ADD_REF_(GTEST_TUPLE_ELEMENT_($i, Tuple)) |
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Field(Tuple& t) { return t.f$(i)_; } // NOLINT |
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template <class Tuple> |
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static GTEST_BY_REF_(GTEST_TUPLE_ELEMENT_($i, Tuple)) |
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ConstField(const Tuple& t) { return t.f$(i)_; } |
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}; |
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]] |
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} // namespace gtest_internal |
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template <int k, GTEST_$(n)_TYPENAMES_(T)> |
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GTEST_ADD_REF_(GTEST_TUPLE_ELEMENT_(k, GTEST_$(n)_TUPLE_(T))) |
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get(GTEST_$(n)_TUPLE_(T)& t) { |
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return gtest_internal::Get<k>::Field(t); |
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} |
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template <int k, GTEST_$(n)_TYPENAMES_(T)> |
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GTEST_BY_REF_(GTEST_TUPLE_ELEMENT_(k, GTEST_$(n)_TUPLE_(T))) |
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get(const GTEST_$(n)_TUPLE_(T)& t) { |
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return gtest_internal::Get<k>::ConstField(t); |
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} |
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// 6.1.3.5 Relational operators |
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// We only implement == and !=, as we don't have a need for the rest yet. |
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namespace gtest_internal { |
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// SameSizeTuplePrefixComparator<k, k>::Eq(t1, t2) returns true if the |
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// first k fields of t1 equals the first k fields of t2. |
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// SameSizeTuplePrefixComparator(k1, k2) would be a compiler error if |
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// k1 != k2. |
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template <int kSize1, int kSize2> |
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struct SameSizeTuplePrefixComparator; |
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template <> |
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struct SameSizeTuplePrefixComparator<0, 0> { |
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template <class Tuple1, class Tuple2> |
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static bool Eq(const Tuple1& /* t1 */, const Tuple2& /* t2 */) { |
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return true; |
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} |
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}; |
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template <int k> |
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struct SameSizeTuplePrefixComparator<k, k> { |
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template <class Tuple1, class Tuple2> |
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static bool Eq(const Tuple1& t1, const Tuple2& t2) { |
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return SameSizeTuplePrefixComparator<k - 1, k - 1>::Eq(t1, t2) && |
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::std::tr1::get<k - 1>(t1) == ::std::tr1::get<k - 1>(t2); |
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} |
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}; |
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} // namespace gtest_internal |
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template <GTEST_$(n)_TYPENAMES_(T), GTEST_$(n)_TYPENAMES_(U)> |
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inline bool operator==(const GTEST_$(n)_TUPLE_(T)& t, |
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const GTEST_$(n)_TUPLE_(U)& u) { |
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return gtest_internal::SameSizeTuplePrefixComparator< |
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tuple_size<GTEST_$(n)_TUPLE_(T) >::value, |
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tuple_size<GTEST_$(n)_TUPLE_(U) >::value>::Eq(t, u); |
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} |
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template <GTEST_$(n)_TYPENAMES_(T), GTEST_$(n)_TYPENAMES_(U)> |
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inline bool operator!=(const GTEST_$(n)_TUPLE_(T)& t, |
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const GTEST_$(n)_TUPLE_(U)& u) { return !(t == u); } |
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// 6.1.4 Pairs. |
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// Unimplemented. |
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} // namespace tr1 |
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} // namespace std |
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$for j [[ |
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#undef GTEST_$(j)_TUPLE_ |
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]] |
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$for j [[ |
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#undef GTEST_$(j)_TYPENAMES_ |
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]] |
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#undef GTEST_DECLARE_TUPLE_AS_FRIEND_ |
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#undef GTEST_BY_REF_ |
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#undef GTEST_ADD_REF_ |
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#undef GTEST_TUPLE_ELEMENT_ |
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#endif // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TUPLE_H_
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