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
108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
// Copyright 2010 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.
|
|
|
|
/// \file utils/optional.hpp
|
|
/// Provides the utils::optional class.
|
|
///
|
|
/// The class is provided as a separate module on its own to minimize
|
|
/// header-inclusion side-effects.
|
|
|
|
#if !defined(UTILS_OPTIONAL_HPP)
|
|
#define UTILS_OPTIONAL_HPP
|
|
|
|
#include <ostream>
|
|
|
|
|
|
namespace utils {
|
|
|
|
|
|
namespace detail {
|
|
|
|
|
|
/// Internal type-safe representation for the none type.
|
|
struct none_t {};
|
|
|
|
|
|
} // namespace detail
|
|
|
|
|
|
/// The none value.
|
|
///
|
|
/// This has internal linkage so it is OK to define it in the header file.
|
|
/// However, pointers to none from different translation units will be
|
|
/// different. Just don't do that.
|
|
const detail::none_t none = {};
|
|
|
|
|
|
/// Holds a data value or none.
|
|
///
|
|
/// This class allows users to represent values that may be uninitialized.
|
|
/// Instead of having to keep separate variables to track whether a variable is
|
|
/// supposed to have a value or not, this class allows multiplexing the
|
|
/// behaviors.
|
|
///
|
|
/// This class is a simplified version of Boost.Optional.
|
|
template< class T >
|
|
class optional {
|
|
/// Internal representation of the optional data value.
|
|
T* _data;
|
|
|
|
public:
|
|
optional(void);
|
|
optional(utils::detail::none_t);
|
|
optional(const optional< T >&);
|
|
explicit optional(const T&);
|
|
~optional(void);
|
|
|
|
optional& operator=(utils::detail::none_t);
|
|
optional& operator=(const T&);
|
|
optional& operator=(const optional< T >&);
|
|
|
|
bool operator==(const optional< T >&) const;
|
|
bool operator!=(const optional< T >&) const;
|
|
|
|
operator bool(void) const;
|
|
|
|
const T& get(void) const;
|
|
const T& get_default(const T&) const;
|
|
T& get(void);
|
|
};
|
|
|
|
|
|
template< class T >
|
|
std::ostream& operator<<(std::ostream&, const optional< T >&);
|
|
|
|
|
|
template< class T >
|
|
optional< T > make_optional(const T&);
|
|
|
|
|
|
} // namespace utils
|
|
|
|
|
|
#endif // !defined(UTILS_OPTIONAL_HPP)
|