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Diffstat (limited to 'include/google/protobuf/stubs/template_util.h')
| -rw-r--r-- | include/google/protobuf/stubs/template_util.h | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/include/google/protobuf/stubs/template_util.h b/include/google/protobuf/stubs/template_util.h deleted file mode 100644 index feef904bea..0000000000 --- a/include/google/protobuf/stubs/template_util.h +++ /dev/null @@ -1,138 +0,0 @@ -// Copyright 2005 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: lar@google.com (Laramie Leavitt) -// -// Template metaprogramming utility functions. -// -// This code is compiled directly on many platforms, including client -// platforms like Windows, Mac, and embedded systems. Before making -// any changes here, make sure that you're not breaking any platforms. -// -// -// The names chosen here reflect those used in tr1 and the boost::mpl -// library, there are similar operations used in the Loki library as -// well. I prefer the boost names for 2 reasons: -// 1. I think that portions of the Boost libraries are more likely to -// be included in the c++ standard. -// 2. It is not impossible that some of the boost libraries will be -// included in our own build in the future. -// Both of these outcomes means that we may be able to directly replace -// some of these with boost equivalents. -// -#ifndef GOOGLE_PROTOBUF_TEMPLATE_UTIL_H_ -#define GOOGLE_PROTOBUF_TEMPLATE_UTIL_H_ - -namespace google { -namespace protobuf { -namespace internal { - -// Types small_ and big_ are guaranteed such that sizeof(small_) < -// sizeof(big_) -typedef char small_; - -struct big_ { - char dummy[2]; -}; - -// Identity metafunction. -template <class T> -struct identity_ { - typedef T type; -}; - -// integral_constant, defined in tr1, is a wrapper for an integer -// value. We don't really need this generality; we could get away -// with hardcoding the integer type to bool. We use the fully -// general integer_constant for compatibility with tr1. - -template<class T, T v> -struct integral_constant { - static const T value = v; - typedef T value_type; - typedef integral_constant<T, v> type; -}; - -template <class T, T v> const T integral_constant<T, v>::value; - - -// Abbreviations: true_type and false_type are structs that represent boolean -// true and false values. Also define the boost::mpl versions of those names, -// true_ and false_. -typedef integral_constant<bool, true> true_type; -typedef integral_constant<bool, false> false_type; -typedef true_type true_; -typedef false_type false_; - -// if_ is a templatized conditional statement. -// if_<cond, A, B> is a compile time evaluation of cond. -// if_<>::type contains A if cond is true, B otherwise. -template<bool cond, typename A, typename B> -struct if_{ - typedef A type; -}; - -template<typename A, typename B> -struct if_<false, A, B> { - typedef B type; -}; - - -// type_equals_ is a template type comparator, similar to Loki IsSameType. -// type_equals_<A, B>::value is true iff "A" is the same type as "B". -// -// New code should prefer base::is_same, defined in base/type_traits.h. -// It is functionally identical, but is_same is the standard spelling. -template<typename A, typename B> -struct type_equals_ : public false_ { -}; - -template<typename A> -struct type_equals_<A, A> : public true_ { -}; - -// and_ is a template && operator. -// and_<A, B>::value evaluates "A::value && B::value". -template<typename A, typename B> -struct and_ : public integral_constant<bool, (A::value && B::value)> { -}; - -// or_ is a template || operator. -// or_<A, B>::value evaluates "A::value || B::value". -template<typename A, typename B> -struct or_ : public integral_constant<bool, (A::value || B::value)> { -}; - - -} // namespace internal -} // namespace protobuf -} // namespace google - -#endif // GOOGLE_PROTOBUF_TEMPLATE_UTIL_H_ |