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Remove error_condition::failed_ in order to prioritise construction efficiency over failed() efficiency (latter is rare for conditions)

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This commit is contained in:
Peter Dimov
2021-09-15 14:54:26 +03:00
parent bb4b500cfc
commit 5e642b1d43
1 changed files with 16 additions and 12 deletions
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28
include/boost/system/detail/error_condition.hpp
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@ -3,7 +3,7 @@
// Copyright Beman Dawes 2006, 2007
// Copyright Christoper Kohlhoff 2007
// Copyright Peter Dimov 2017, 2018
// Copyright Peter Dimov 2017-2021
//
// 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)
@ -45,7 +45,6 @@ class error_condition
private:
int val_;
bool failed_;
error_category const * cat_;
public:
@ -53,17 +52,17 @@ public:
// constructors:
BOOST_SYSTEM_CONSTEXPR error_condition() BOOST_NOEXCEPT:
val_( 0 ), failed_( false ), cat_( 0 )
val_( 0 ), cat_( 0 )
{
}
BOOST_SYSTEM_CONSTEXPR error_condition( int val, const error_category & cat ) BOOST_NOEXCEPT:
val_( val ), failed_( detail::failed_impl( val, cat ) ), cat_( &cat )
val_( val ), cat_( &cat )
{
}
BOOST_SYSTEM_CONSTEXPR explicit error_condition( boost::system::detail::generic_value_tag vt ) BOOST_NOEXCEPT:
val_( vt.value ), failed_( vt.value != 0 ), cat_( 0 )
val_( vt.value ), cat_( 0 )
{
}
@ -77,7 +76,7 @@ public:
template<class ErrorConditionEnum> BOOST_SYSTEM_CONSTEXPR error_condition( ErrorConditionEnum e,
typename detail::enable_if<boost::system::detail::is_same<ErrorConditionEnum, errc::errc_t>::value>::type* = 0) BOOST_NOEXCEPT:
val_( e ), failed_( e != 0 ), cat_( 0 )
val_( e ), cat_( 0 )
{
}
@ -86,7 +85,6 @@ public:
BOOST_SYSTEM_CONSTEXPR void assign( int val, const error_category & cat ) BOOST_NOEXCEPT
{
val_ = val;
failed_ = detail::failed_impl( val, cat );
cat_ = &cat;
}
@ -101,7 +99,6 @@ public:
BOOST_SYSTEM_CONSTEXPR void clear() BOOST_NOEXCEPT
{
val_ = 0;
failed_ = false;
cat_ = 0;
}
@ -143,14 +140,21 @@ public:
BOOST_SYSTEM_CONSTEXPR bool failed() const BOOST_NOEXCEPT
{
return failed_;
if( cat_ )
{
return detail::failed_impl( val_, *cat_ );
}
else
{
return val_ != 0;
}
}
#if !defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_NOEXCEPT // true if error
{
return failed_;
return failed();
}
#else
@ -160,12 +164,12 @@ public:
BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const BOOST_NOEXCEPT // true if error
{
return failed_? unspecified_bool_true: 0;
return failed()? unspecified_bool_true: 0;
}
BOOST_SYSTEM_CONSTEXPR bool operator!() const BOOST_NOEXCEPT // true if no error
{
return !failed_;
return !failed();
}
#endif