11be35a165
To do so, a few dependencies have been imported: * external/bsd/lutok * external/mit/lua * external/public-domain/sqlite * external/public-domain/xz The Kyua framework is the new generation of ATF (Automated Test Framework), it is composed of: * external/bsd/atf * external/bsd/kyua-atf-compat * external/bsd/kyua-cli * external/bsd/kyua-tester * tests Kyua/ATF being written in C++, it depends on libstdc++ which is provided by GCC. As this is not part of the sources, Kyua is only compiled when the native GCC utils are installed. To install Kyua do the following: * In a cross-build enviromnent, add the following to the build.sh commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes WARNING: At this point the import is still experimental, and not supported on native builds (a.k.a make build). Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
// Copyright 2010 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 copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// 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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/// \file utils/optional.hpp
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/// Provides the utils::optional class.
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///
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/// The class is provided as a separate module on its own to minimize
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/// header-inclusion side-effects.
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#if !defined(UTILS_OPTIONAL_HPP)
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#define UTILS_OPTIONAL_HPP
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#include <ostream>
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namespace utils {
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namespace detail {
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/// Internal type-safe representation for the none type.
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struct none_t {};
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} // namespace detail
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/// The none value.
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///
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/// This has internal linkage so it is OK to define it in the header file.
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/// However, pointers to none from different translation units will be
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/// different. Just don't do that.
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const detail::none_t none = {};
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/// Holds a data value or none.
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///
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/// This class allows users to represent values that may be uninitialized.
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/// Instead of having to keep separate variables to track whether a variable is
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/// supposed to have a value or not, this class allows multiplexing the
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/// behaviors.
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///
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/// This class is a simplified version of Boost.Optional.
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template< class T >
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class optional {
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/// Internal representation of the optional data value.
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T* _data;
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public:
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optional(void);
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optional(utils::detail::none_t);
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optional(const optional< T >&);
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explicit optional(const T&);
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~optional(void);
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optional& operator=(utils::detail::none_t);
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optional& operator=(const T&);
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optional& operator=(const optional< T >&);
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bool operator==(const optional< T >&) const;
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bool operator!=(const optional< T >&) const;
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operator bool(void) const;
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const T& get(void) const;
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const T& get_default(const T&) const;
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T& get(void);
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};
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template< class T >
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std::ostream& operator<<(std::ostream&, const optional< T >&);
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template< class T >
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optional< T > make_optional(const T&);
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} // namespace utils
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#endif // !defined(UTILS_OPTIONAL_HPP)
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