336 lines
8.9 KiB
C++
336 lines
8.9 KiB
C++
$$ -*- mode: c++; -*-
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$var n = 10 $$ 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 5th Edition (__S60_50__) has a bug
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// that prevents us from declaring the tuple template as a friend (it
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// complains that tuple is redefined). This hack bypasses the bug by
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// declaring the members that should otherwise be private as public.
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#if defined(__SYMBIAN32__) && __S60_50__
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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$i type; };
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]]
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} // namespace gtest_internal
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template <>
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class tuple<> {
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public:
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tuple() {}
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tuple(const tuple& /* t */) {}
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tuple& operator=(const tuple& /* t */) { return *this; }
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};
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$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)]] $else [[tuple]] {
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public:
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template <int k> friend class gtest_internal::Get;
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tuple() {}
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explicit tuple($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)> { static const int value = $j; };
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]]
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template <int k, class Tuple>
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struct tuple_element {
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typedef typename gtest_internal::TupleElement<
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k < (tuple_size<Tuple>::value), k, Tuple>::type type;
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};
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#define GTEST_TUPLE_ELEMENT_(k, Tuple) typename tuple_element<k, Tuple >::type
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// 6.1.3.4 Element access.
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namespace gtest_internal {
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$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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