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Author SHA1 Message Date
9339be979f v2, v3, integration branch
[SVN r62649]
2010-06-09 11:34:33 +00:00
7 changed files with 64 additions and 138 deletions

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@ -1,13 +1,3 @@
# Tribool library
# Copyright (C) 2002-2003 Douglas Gregor
# Use, modification and distribution is subject to the Boost Software License,
# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
# For more information, see http://www.boost.org/
project boost-sandbox/utility/doc ;
import boostbook ;
import doxygen ;
@ -17,20 +7,9 @@ doxygen reference : [ glob ../../../boost/logic/tribool.hpp ]
[ glob ../../../boost/logic/tribool_io.hpp ]
;
boostbook tribool
:
tribool.boostbook
:
<xsl:param>boost.root=../../../..
:
tribool.boostbook
:
<format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
<dependency>reference
;
###############################################################################
alias boostdoc
: tribool/<format>docbook
:
:
: ;
explicit boostdoc ;
alias boostrelease ;
explicit boostrelease ;
;

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@ -138,18 +138,6 @@ if (<functionname>indeterminate</functionname>(x)) {
else {
// report success or failure of x
}</programlisting>
<para> All the logical operators and methods of <code><classname>tribool</classname></code> are marked
as <code>constexpr</code> in C++11. It means that <code><classname>tribool</classname></code> can
be used in compile time expressions:</para>
<programlisting>constexpr <classname>tribool</classname> x = (tribool(true) || tribool(indeterminate));
<functionname>static_assert</functionname>(x, "Must be true!");
</programlisting>
<note>Some compilers may have troubles with evaluating <code>tribool::operator safe_bool()</code> at compile time.</note>
</section>
<section>

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@ -14,7 +14,7 @@
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#if BOOST_WORKAROUND(_MSC_VER, >= 1200)
# 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
*/
BOOST_CONSTEXPR inline bool
inline bool
indeterminate(tribool x,
detail::indeterminate_t dummy = detail::indeterminate_t()) BOOST_NOEXCEPT;
detail::indeterminate_t dummy = detail::indeterminate_t());
/**
* \brief A 3-state boolean type.
@ -85,7 +85,7 @@ public:
*
* \throws nothrow
*/
BOOST_CONSTEXPR tribool() BOOST_NOEXCEPT : value(false_value) {}
tribool() : value(false_value) {}
/**
* Construct a new 3-state boolean value with the given boolean
@ -93,14 +93,14 @@ public:
*
* \throws nothrow
*/
BOOST_CONSTEXPR tribool(bool initial_value) BOOST_NOEXCEPT : value(initial_value? true_value : false_value) {}
tribool(bool initial_value) : value(initial_value? true_value : false_value) {}
/**
* Construct a new 3-state boolean value with an indeterminate value.
*
* \throws nothrow
*/
BOOST_CONSTEXPR tribool(indeterminate_keyword_t) BOOST_NOEXCEPT : value(indeterminate_value) {}
tribool(indeterminate_keyword_t) : 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
*/
BOOST_CONSTEXPR operator safe_bool() const BOOST_NOEXCEPT
operator safe_bool() const
{
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
BOOST_CONSTEXPR inline bool indeterminate(tribool x, detail::indeterminate_t) BOOST_NOEXCEPT
inline bool indeterminate(tribool x, detail::indeterminate_t)
{
return x.value == tribool::indeterminate_value;
}
@ -156,7 +156,7 @@ BOOST_CONSTEXPR inline bool indeterminate(tribool x, detail::indeterminate_t) BO
* </table>
* \throws nothrow
*/
BOOST_CONSTEXPR inline tribool operator!(tribool x) BOOST_NOEXCEPT
inline tribool operator!(tribool x)
{
return x.value == tribool::false_value? tribool(true)
:x.value == tribool::true_value? tribool(false)
@ -196,36 +196,38 @@ BOOST_CONSTEXPR inline tribool operator!(tribool x) BOOST_NOEXCEPT
* </table>
* \throws nothrow
*/
BOOST_CONSTEXPR inline tribool operator&&(tribool x, tribool y) BOOST_NOEXCEPT
inline tribool operator&&(tribool x, tribool y)
{
return (static_cast<bool>(!x) || static_cast<bool>(!y))
? tribool(false)
: ((static_cast<bool>(x) && static_cast<bool>(y)) ? tribool(true) : indeterminate)
;
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;
}
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator&&(tribool x, bool y) BOOST_NOEXCEPT
inline tribool operator&&(tribool x, bool y)
{ return y? x : tribool(false); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator&&(bool x, tribool y) BOOST_NOEXCEPT
inline tribool operator&&(bool x, tribool y)
{ return x? y : tribool(false); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator&&(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT
inline tribool operator&&(indeterminate_keyword_t, tribool x)
{ return !x? tribool(false) : tribool(indeterminate); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator&&(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT
inline tribool operator&&(tribool x, indeterminate_keyword_t)
{ return !x? tribool(false) : tribool(indeterminate); }
/**
@ -261,36 +263,38 @@ BOOST_CONSTEXPR inline tribool operator&&(tribool x, indeterminate_keyword_t) BO
* </table>
* \throws nothrow
*/
BOOST_CONSTEXPR inline tribool operator||(tribool x, tribool y) BOOST_NOEXCEPT
inline tribool operator||(tribool x, tribool y)
{
return (static_cast<bool>(!x) && static_cast<bool>(!y))
? tribool(false)
: ((static_cast<bool>(x) || static_cast<bool>(y)) ? tribool(true) : tribool(indeterminate))
;
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;
}
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator||(tribool x, bool y) BOOST_NOEXCEPT
inline tribool operator||(tribool x, bool y)
{ return y? tribool(true) : x; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator||(bool x, tribool y) BOOST_NOEXCEPT
inline tribool operator||(bool x, tribool y)
{ return x? tribool(true) : y; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator||(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT
inline tribool operator||(indeterminate_keyword_t, tribool x)
{ return x? tribool(true) : tribool(indeterminate); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator||(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT
inline tribool operator||(tribool x, indeterminate_keyword_t)
{ return x? tribool(true) : tribool(indeterminate); }
//@}
@ -327,34 +331,34 @@ BOOST_CONSTEXPR inline tribool operator||(tribool x, indeterminate_keyword_t) BO
* </table>
* \throws nothrow
*/
BOOST_CONSTEXPR inline tribool operator==(tribool x, tribool y) BOOST_NOEXCEPT
inline tribool operator==(tribool x, tribool y)
{
return (indeterminate(x) || indeterminate(y))
? indeterminate
: ((x && y) || (!x && !y))
;
if (indeterminate(x) || indeterminate(y))
return indeterminate;
else
return (x && y) || (!x && !y);
}
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator==(tribool x, bool y) BOOST_NOEXCEPT { return x == tribool(y); }
inline tribool operator==(tribool x, bool y) { return x == tribool(y); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator==(bool x, tribool y) BOOST_NOEXCEPT { return tribool(x) == y; }
inline tribool operator==(bool x, tribool y) { return tribool(x) == y; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator==(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT
inline tribool operator==(indeterminate_keyword_t, tribool x)
{ return tribool(indeterminate) == x; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator==(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT
inline tribool operator==(tribool x, indeterminate_keyword_t)
{ return tribool(indeterminate) == x; }
/**
@ -390,34 +394,34 @@ BOOST_CONSTEXPR inline tribool operator==(tribool x, indeterminate_keyword_t) BO
* </table>
* \throws nothrow
*/
BOOST_CONSTEXPR inline tribool operator!=(tribool x, tribool y) BOOST_NOEXCEPT
inline tribool operator!=(tribool x, tribool y)
{
return (indeterminate(x) || indeterminate(y))
? indeterminate
: !((x && y) || (!x && !y))
;
if (indeterminate(x) || indeterminate(y))
return indeterminate;
else
return !((x && y) || (!x && !y));
}
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator!=(tribool x, bool y) BOOST_NOEXCEPT { return x != tribool(y); }
inline tribool operator!=(tribool x, bool y) { return x != tribool(y); }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator!=(bool x, tribool y) BOOST_NOEXCEPT { return tribool(x) != y; }
inline tribool operator!=(bool x, tribool y) { return tribool(x) != y; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator!=(indeterminate_keyword_t, tribool x) BOOST_NOEXCEPT
inline tribool operator!=(indeterminate_keyword_t, tribool x)
{ return tribool(indeterminate) != x; }
/**
* \overload
*/
BOOST_CONSTEXPR inline tribool operator!=(tribool x, indeterminate_keyword_t) BOOST_NOEXCEPT
inline tribool operator!=(tribool x, indeterminate_keyword_t)
{ return x != tribool(indeterminate); }
} } // end namespace boost::logic

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@ -11,7 +11,7 @@
#include <boost/detail/workaround.hpp>
#include <boost/noncopyable.hpp>
#if defined(_MSC_VER)
#if BOOST_WORKAROUND(_MSC_VER, >= 1200)
# pragma once
#endif
@ -104,11 +104,17 @@ template<>
inline std::basic_string<char> get_default_indeterminate_name<char>()
{ return "indeterminate"; }
#ifndef BOOST_NO_WCHAR_T
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
// VC++ 6.0 chokes on the specialization below, so we're stuck without
// wchar_t support. What a pain. TODO: it might just need a the template
// parameter as function parameter...
#else
# ifndef BOOST_NO_WCHAR_T
/// Returns the wide character string L"indeterminate".
template<>
inline std::basic_string<wchar_t> get_default_indeterminate_name<wchar_t>()
{ return L"indeterminate"; }
# endif
#endif
// http://www.cantrip.org/locale.html
@ -279,9 +285,9 @@ operator>>(std::basic_istream<CharT, Traits>& in, tribool& x)
bool falsename_ok = true, truename_ok = true, othername_ok = true;
// Modeled after the code from Library DR 17
while ((falsename_ok && pos < falsename.size())
|| (truename_ok && pos < truename.size())
|| (othername_ok && pos < othername.size())) {
while (falsename_ok && pos < falsename.size()
|| truename_ok && pos < truename.size()
|| othername_ok && pos < othername.size()) {
typename Traits::int_type c = in.get();
if (c == Traits::eof())
return in;

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@ -1,16 +0,0 @@
<!--
Copyright 2011 Daniel James.
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-->
<html>
<head>
<meta http-equiv="refresh" content="0; URL=../../doc/html/tribool.html">
</head>
<body>
Automatic redirection failed, please go to
<a href="../../doc/html/tribool.html">../../doc/html/tribool.html</a>
</body>
</html>

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@ -1,15 +0,0 @@
{
"key": "logic/tribool",
"name": "Tribool",
"authors": [
"Doug Gregor"
],
"description": "3-state boolean type library.",
"documentation": "/doc/html/tribool.html",
"category": [
"Miscellaneous"
],
"maintainers": [
"Douglas Gregor <dgregor -at- cs.indiana.edu>"
]
}

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@ -114,26 +114,6 @@ int test_main(int, char*[])
BOOST_CHECK(false);
}
#ifndef BOOST_NO_CXX11_CONSTEXPR
constexpr bool res_ors = indeterminate(false || tribool(false) || false || indeterminate); // true
BOOST_CHECK(res_ors);
char array_ors[res_ors ? 2 : 3];
BOOST_CHECK(sizeof(array_ors) / sizeof(char) == 2);
constexpr bool res_ands = !indeterminate(!(true && tribool(true) && true && indeterminate)); // false
BOOST_CHECK(!res_ands);
char array_ands[res_ands ? 2 : 3];
BOOST_CHECK(sizeof(array_ands) / sizeof(char) == 3);
// We avoid checking the tribool::operator safe_bool(),
// because GCC-4.8 fails to evaluate it at compile-time.
// Clang compiles well.
//
// constexpr bool res_safe_bool = tribool(true); // false
// constexpr tribool xxx = (tribool(true) || tribool(indeterminate));
// static_assert(xxx, "Must be true!");
#endif
std::cout << "no errors detected\n";
return 0;
}