diff options
Diffstat (limited to 'boost/logic/tribool.hpp')
-rw-r--r-- | boost/logic/tribool.hpp | 94 |
1 files changed, 45 insertions, 49 deletions
diff --git a/boost/logic/tribool.hpp b/boost/logic/tribool.hpp index 167a72ade0..c4788c1cbf 100644 --- a/boost/logic/tribool.hpp +++ b/boost/logic/tribool.hpp @@ -14,7 +14,7 @@ #include <boost/config.hpp> #include <boost/detail/workaround.hpp> -#if defined(_MSC_VER) +#ifdef BOOST_HAS_PRAGMA_ONCE # pragma once #endif @@ -59,9 +59,9 @@ typedef bool (*indeterminate_keyword_t)(tribool, detail::indeterminate_t); * \returns <tt>x.value == tribool::indeterminate_value</tt> * \throws nothrow */ -inline bool +BOOST_CONSTEXPR inline bool indeterminate(tribool x, - detail::indeterminate_t dummy = detail::indeterminate_t()); + detail::indeterminate_t dummy = detail::indeterminate_t()) BOOST_NOEXCEPT; /** * \brief A 3-state boolean type. @@ -85,7 +85,7 @@ public: * * \throws nothrow */ - tribool() : value(false_value) {} + BOOST_CONSTEXPR tribool() BOOST_NOEXCEPT : value(false_value) {} /** * Construct a new 3-state boolean value with the given boolean @@ -93,14 +93,14 @@ public: * * \throws nothrow */ - tribool(bool initial_value) : value(initial_value? true_value : false_value) {} + BOOST_CONSTEXPR tribool(bool initial_value) BOOST_NOEXCEPT : value(initial_value? true_value : false_value) {} /** * Construct a new 3-state boolean value with an indeterminate value. * * \throws nothrow */ - tribool(indeterminate_keyword_t) : value(indeterminate_value) {} + BOOST_CONSTEXPR tribool(indeterminate_keyword_t) BOOST_NOEXCEPT : value(indeterminate_value) {} /** * Use a 3-state boolean in a boolean context. Will evaluate true in a @@ -109,7 +109,7 @@ public: * \returns true if the 3-state boolean is true, false otherwise * \throws nothrow */ - operator safe_bool() const + BOOST_CONSTEXPR operator safe_bool() const BOOST_NOEXCEPT { return value == true_value? &dummy::nonnull : 0; } @@ -123,7 +123,7 @@ public: // Check if the given tribool has an indeterminate value. Also doubles as a // keyword for the 'indeterminate' value -inline bool indeterminate(tribool x, detail::indeterminate_t) +BOOST_CONSTEXPR inline bool indeterminate(tribool x, detail::indeterminate_t) BOOST_NOEXCEPT { return x.value == tribool::indeterminate_value; } @@ -156,7 +156,7 @@ inline bool indeterminate(tribool x, detail::indeterminate_t) * </table> * \throws nothrow */ -inline tribool operator!(tribool x) +BOOST_CONSTEXPR inline tribool operator!(tribool x) BOOST_NOEXCEPT { return x.value == tribool::false_value? tribool(true) :x.value == tribool::true_value? tribool(false) @@ -196,38 +196,36 @@ inline tribool operator!(tribool x) * </table> * \throws nothrow */ -inline tribool operator&&(tribool x, tribool y) +BOOST_CONSTEXPR inline tribool operator&&(tribool x, tribool y) BOOST_NOEXCEPT { - if (static_cast<bool>(!x) || static_cast<bool>(!y)) - return false; - else if (static_cast<bool>(x) && static_cast<bool>(y)) - return true; - else - return indeterminate; + return (static_cast<bool>(!x) || static_cast<bool>(!y)) + ? tribool(false) + : ((static_cast<bool>(x) && static_cast<bool>(y)) ? tribool(true) : indeterminate) + ; } /** * \overload */ -inline tribool operator&&(tribool x, bool y) +BOOST_CONSTEXPR inline tribool operator&&(tribool x, bool y) BOOST_NOEXCEPT { return y? x : tribool(false); } /** * \overload */ -inline tribool operator&&(bool x, tribool y) +BOOST_CONSTEXPR inline tribool operator&&(bool x, tribool y) BOOST_NOEXCEPT { return x? y : tribool(false); } /** * \overload */ -inline tribool operator&&(indeterminate_keyword_t, tribool x) +BOOST_CONSTEXPR inline tribool operator&&(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT { return !x? tribool(false) : tribool(indeterminate); } /** * \overload */ -inline tribool operator&&(tribool x, indeterminate_keyword_t) +BOOST_CONSTEXPR inline tribool operator&&(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT { return !x? tribool(false) : tribool(indeterminate); } /** @@ -263,38 +261,36 @@ inline tribool operator&&(tribool x, indeterminate_keyword_t) * </table> * \throws nothrow */ -inline tribool operator||(tribool x, tribool y) +BOOST_CONSTEXPR inline tribool operator||(tribool x, tribool y) BOOST_NOEXCEPT { - if (static_cast<bool>(!x) && static_cast<bool>(!y)) - return false; - else if (static_cast<bool>(x) || static_cast<bool>(y)) - return true; - else - return indeterminate; + return (static_cast<bool>(!x) && static_cast<bool>(!y)) + ? tribool(false) + : ((static_cast<bool>(x) || static_cast<bool>(y)) ? tribool(true) : tribool(indeterminate)) + ; } /** * \overload */ -inline tribool operator||(tribool x, bool y) +BOOST_CONSTEXPR inline tribool operator||(tribool x, bool y) BOOST_NOEXCEPT { return y? tribool(true) : x; } /** * \overload */ -inline tribool operator||(bool x, tribool y) +BOOST_CONSTEXPR inline tribool operator||(bool x, tribool y) BOOST_NOEXCEPT { return x? tribool(true) : y; } /** * \overload */ -inline tribool operator||(indeterminate_keyword_t, tribool x) +BOOST_CONSTEXPR inline tribool operator||(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT { return x? tribool(true) : tribool(indeterminate); } /** * \overload */ -inline tribool operator||(tribool x, indeterminate_keyword_t) +BOOST_CONSTEXPR inline tribool operator||(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT { return x? tribool(true) : tribool(indeterminate); } //@} @@ -331,34 +327,34 @@ inline tribool operator||(tribool x, indeterminate_keyword_t) * </table> * \throws nothrow */ -inline tribool operator==(tribool x, tribool y) +BOOST_CONSTEXPR inline tribool operator==(tribool x, tribool y) BOOST_NOEXCEPT { - if (indeterminate(x) || indeterminate(y)) - return indeterminate; - else - return (x && y) || (!x && !y); + return (indeterminate(x) || indeterminate(y)) + ? indeterminate + : ((x && y) || (!x && !y)) + ; } /** * \overload */ -inline tribool operator==(tribool x, bool y) { return x == tribool(y); } +BOOST_CONSTEXPR inline tribool operator==(tribool x, bool y) BOOST_NOEXCEPT { return x == tribool(y); } /** * \overload */ -inline tribool operator==(bool x, tribool y) { return tribool(x) == y; } +BOOST_CONSTEXPR inline tribool operator==(bool x, tribool y) BOOST_NOEXCEPT { return tribool(x) == y; } /** * \overload */ -inline tribool operator==(indeterminate_keyword_t, tribool x) +BOOST_CONSTEXPR inline tribool operator==(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT { return tribool(indeterminate) == x; } /** * \overload */ -inline tribool operator==(tribool x, indeterminate_keyword_t) +BOOST_CONSTEXPR inline tribool operator==(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT { return tribool(indeterminate) == x; } /** @@ -394,34 +390,34 @@ inline tribool operator==(tribool x, indeterminate_keyword_t) * </table> * \throws nothrow */ -inline tribool operator!=(tribool x, tribool y) +BOOST_CONSTEXPR inline tribool operator!=(tribool x, tribool y) BOOST_NOEXCEPT { - if (indeterminate(x) || indeterminate(y)) - return indeterminate; - else - return !((x && y) || (!x && !y)); + return (indeterminate(x) || indeterminate(y)) + ? indeterminate + : !((x && y) || (!x && !y)) + ; } /** * \overload */ -inline tribool operator!=(tribool x, bool y) { return x != tribool(y); } +BOOST_CONSTEXPR inline tribool operator!=(tribool x, bool y) BOOST_NOEXCEPT { return x != tribool(y); } /** * \overload */ -inline tribool operator!=(bool x, tribool y) { return tribool(x) != y; } +BOOST_CONSTEXPR inline tribool operator!=(bool x, tribool y) BOOST_NOEXCEPT { return tribool(x) != y; } /** * \overload */ -inline tribool operator!=(indeterminate_keyword_t, tribool x) +BOOST_CONSTEXPR inline tribool operator!=(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT { return tribool(indeterminate) != x; } /** * \overload */ -inline tribool operator!=(tribool x, indeterminate_keyword_t) +BOOST_CONSTEXPR inline tribool operator!=(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT { return x != tribool(indeterminate); } } } // end namespace boost::logic |