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functional (function): Use explicit operator bool.

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2009-05-20  Benjamin Kosnik  <bkoz@redhat.com>

	* include/tr1_impl/functional (function): Use explicit operator bool.
	* include/bits/shared_ptr.h (__shared_ptr): Same.
	* include/bits/unique_ptr.h (unique_ptr): Same.
	* include/std/mutex (unique_lock): Same.
	* include/std/system_error (error_code): Same.
	(error_condition): Same.
	* include/std/ostream (sentry): Same.
	* include/std/istream (sentry): Same.
	* testsuite/19_diagnostics/error_condition/operators/bool.cc: Adjust.
	* testsuite/19_diagnostics/error_condition/operators/bool_neg.cc: Same.
	* testsuite/19_diagnostics/error_code/operators/bool.cc: Same.
	* testsuite/19_diagnostics/error_code/operators/bool_neg.cc: Same.
	* testsuite/20_util/unique_ptr/modifiers/reset_neg.cc: Same.
	* testsuite/20_util/unique_ptr/assign/assign_neg.cc: Same.
	* testsuite/20_util/shared_ptr/observers/bool_conv.cc: Same.

From-SVN: r147756
This commit is contained in:
Benjamin Kosnik 2009-05-21 01:12:00 +00:00
parent f256c06431
commit d29d4507b2
15 changed files with 67 additions and 57 deletions
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18
libstdc++-v3/ChangeLog
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@ -1,3 +1,21 @@
2009-05-20 Benjamin Kosnik <bkoz@redhat.com>
* include/tr1_impl/functional (function): Use explicit operator bool.
* include/bits/shared_ptr.h (__shared_ptr): Same.
* include/bits/unique_ptr.h (unique_ptr): Same.
* include/std/mutex (unique_lock): Same.
* include/std/system_error (error_code): Same.
(error_condition): Same.
* include/std/ostream (sentry): Same.
* include/std/istream (sentry): Same.
* testsuite/19_diagnostics/error_condition/operators/bool.cc: Adjust.
* testsuite/19_diagnostics/error_condition/operators/bool_neg.cc: Same.
* testsuite/19_diagnostics/error_code/operators/bool.cc: Same.
* testsuite/19_diagnostics/error_code/operators/bool_neg.cc: Same.
* testsuite/20_util/unique_ptr/modifiers/reset_neg.cc: Same.
* testsuite/20_util/unique_ptr/assign/assign_neg.cc: Same.
* testsuite/20_util/shared_ptr/observers/bool_conv.cc: Same.
2009-05-19 Benjamin Kosnik <bkoz@redhat.com>
* testsuite/23_containers/list/14340.cc: Abstract list type.

9
libstdc++-v3/include/bits/shared_ptr.h
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@ -816,13 +816,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
get() const // never throws
{ return _M_ptr; }
// Implicit conversion to "bool"
private:
typedef _Tp* __shared_ptr::*__unspecified_bool_type;
public:
operator __unspecified_bool_type() const // never throws
{ return _M_ptr == 0 ? 0 : &__shared_ptr::_M_ptr; }
explicit operator bool() const // never throws
{ return _M_ptr == 0 ? false : true; }
bool
unique() const // never throws

10
libstdc++-v3/include/bits/unique_ptr.h
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@ -85,7 +85,6 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
class unique_ptr
{
typedef std::tuple<_Tp*, _Tp_Deleter> __tuple_type;
typedef __tuple_type unique_ptr::* __unspecified_bool_type;
typedef _Tp* unique_ptr::* __unspecified_pointer_type;
public:
@ -181,8 +180,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
get_deleter() const
{ return std::get<1>(_M_t); }
operator __unspecified_bool_type () const
{ return get() == 0 ? 0 : &unique_ptr::_M_t; }
explicit operator bool() const
{ return get() == 0 ? false : true; }
// Modifiers.
pointer
@ -233,7 +232,6 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
class unique_ptr<_Tp[], _Tp_Deleter>
{
typedef std::tuple<_Tp*, _Tp_Deleter> __tuple_type;
typedef __tuple_type unique_ptr::* __unspecified_bool_type;
typedef _Tp* unique_ptr::* __unspecified_pointer_type;
public:
@ -323,8 +321,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
get_deleter() const
{ return std::get<1>(_M_t); }
operator __unspecified_bool_type () const
{ return get() == 0 ? 0 : &unique_ptr::_M_t; }
explicit operator bool() const
{ return get() == 0 ? false : true; }
// Modifiers.
pointer

9
libstdc++-v3/include/std/istream
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@ -631,6 +631,9 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
template<typename _CharT, typename _Traits>
class basic_istream<_CharT, _Traits>::sentry
{
// Data Members.
bool _M_ok;
public:
/// Easy access to dependant types.
typedef _Traits traits_type;
@ -670,11 +673,11 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
* For ease of use, sentries may be converted to booleans. The
* return value is that of the sentry state (true == okay).
*/
#ifdef __GXX_EXPERIMENTAL_CXX0X__
explicit
#endif
operator bool() const
{ return _M_ok; }
private:
bool _M_ok;
};
// [27.6.1.2.3] character extraction templates

2
libstdc++-v3/include/std/mutex
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@ -574,7 +574,7 @@ namespace std
owns_lock() const
{ return _M_owns; }
/* explicit */ operator bool () const
explicit operator bool() const
{ return owns_lock(); }
mutex_type*

5
libstdc++-v3/include/std/ostream
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@ -376,7 +376,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
template <typename _CharT, typename _Traits>
class basic_ostream<_CharT, _Traits>::sentry
{
// Data Members:
// Data Members.
bool _M_ok;
basic_ostream<_CharT, _Traits>& _M_os;
@ -420,6 +420,9 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
* For ease of use, sentries may be converted to booleans. The
* return value is that of the sentry state (true == okay).
*/
#ifdef __GXX_EXPERIMENTAL_CXX0X__
explicit
#endif
operator bool() const
{ return _M_ok; }
};

22
libstdc++-v3/include/std/system_error
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@ -152,15 +152,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
message() const
{ return category().message(value()); }
// Safe bool idiom.
// explicit operator bool() const throw()
// { return _M_value != 0; }
typedef void (*__bool_type)();
static void __not_bool_type() { }
operator __bool_type() const
{ return _M_value != 0 ? &__not_bool_type : false; }
explicit operator bool() const
{ return _M_value != 0 ? true : false; }
// DR 804.
private:
@ -233,15 +226,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
message() const
{ return category().message(value()); }
// Safe bool idiom.
// explicit operator bool() const throw()
// { return _M_value != 0; }
typedef void (*__bool_type)();
static void __not_bool_type() { }
operator __bool_type() const
{ return _M_value != 0 ? &__not_bool_type : false; }
explicit operator bool() const
{ return _M_value != 0 ? true : false; }
// DR 804.
private:

7
libstdc++-v3/include/tr1_impl/functional
View File

@ -1761,6 +1761,7 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
: public _Maybe_unary_or_binary_function<_Res, _ArgTypes...>,
private _Function_base
{
#ifndef __GXX_EXPERIMENTAL_CXX0X__
/// This class is used to implement the safe_bool idiom.
struct _Hidden_type
{
@ -1769,6 +1770,7 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
/// This typedef is used to implement the safe_bool idiom.
typedef _Hidden_type* _Hidden_type::* _Safe_bool;
#endif
typedef _Res _Signature_type(_ArgTypes...);
@ -1918,6 +1920,10 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
*
* This function will not throw an exception.
*/
#ifdef __GXX_EXPERIMENTAL_CXX0X__
explicit operator bool() const
{ return !_M_empty(); }
#else
operator _Safe_bool() const
{
if (_M_empty())
@ -1925,6 +1931,7 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
else
return &_Hidden_type::_M_bool;
}
#endif
// [3.7.2.4] function invocation

4
libstdc++-v3/testsuite/19_diagnostics/error_code/operators/bool.cc
View File

@ -28,14 +28,14 @@ int main()
// 1
std::error_code e1;
if (e1)
if (static_cast<bool>(e1))
{
VERIFY( false );
}
// 2
std::error_code e2(std::make_error_code(std::errc::operation_not_supported));
if (e2)
if (static_cast<bool>(e2))
{
VERIFY( true );
}

2
libstdc++-v3/testsuite/19_diagnostics/error_code/operators/bool_neg.cc
View File

@ -30,4 +30,4 @@ int main()
return i;
}
// { dg-error "invalid conversion" "" { target *-*-* } 28 }
// { dg-error "could not convert" "" { target *-*-* } 28 }

4
libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/bool.cc
View File

@ -27,14 +27,14 @@ void test01()
// 1
std::error_condition e1;
if (e1)
if (static_cast<bool>(e1))
{
VERIFY( false );
}
// 2
std::error_condition e2(std::errc::operation_not_supported);
if (e2)
if (static_cast<bool>(e2))
{
VERIFY( true );
}

2
libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/bool_neg.cc
View File

@ -29,4 +29,4 @@ int test01()
return i;
}
// { dg-error "invalid conversion" "" { target *-*-* } 27 }
// { dg-error "could not convert" "" { target *-*-* } 27 }

16
libstdc++-v3/testsuite/20_util/shared_ptr/observers/bool_conv.cc
View File

@ -33,9 +33,9 @@ test01()
bool test __attribute__((unused)) = true;
const std::shared_ptr<A> p1;
VERIFY( p1 == false );
VERIFY( static_cast<bool>(p1) == false );
const std::shared_ptr<A> p2(p1);
VERIFY( p2 == false );
VERIFY( static_cast<bool>(p2) == false );
}
void
@ -44,12 +44,12 @@ test02()
bool test __attribute__((unused)) = true;
std::shared_ptr<A> p1(new A);
VERIFY( p1 );
VERIFY( static_cast<bool>(p1) );
std::shared_ptr<A> p2(p1);
VERIFY( p2 );
VERIFY( static_cast<bool>(p2) );
p1.reset();
VERIFY( !p1 );
VERIFY( p2 );
VERIFY( !static_cast<bool>(p1) );
VERIFY( static_cast<bool>(p2) );
}
void
@ -60,8 +60,8 @@ test03()
std::shared_ptr<A> p1(new A);
std::shared_ptr<A> p2(p1);
p2.reset(new A);
VERIFY( p1 );
VERIFY( p2 );
VERIFY( static_cast<bool>(p1) );
VERIFY( static_cast<bool>(p2) );
}

6
libstdc++-v3/testsuite/20_util/unique_ptr/assign/assign_neg.cc
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@ -52,7 +52,7 @@ test03()
// { dg-error "used here" "" { target *-*-* } 42 }
// { dg-error "no matching" "" { target *-*-* } 48 }
// { dg-error "used here" "" { target *-*-* } 49 }
// { dg-error "candidates are" "" { target *-*-* } 214 }
// { dg-error "deleted function" "" { target *-*-* } 214 }
// { dg-error "deleted function" "" { target *-*-* } 360 }
// { dg-error "candidates are" "" { target *-*-* } 213 }
// { dg-error "deleted function" "" { target *-*-* } 213 }
// { dg-error "deleted function" "" { target *-*-* } 358 }
// { dg-excess-errors "note" }

2
libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/reset_neg.cc
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@ -36,4 +36,4 @@ void test01()
}
// { dg-error "used here" "" { target *-*-* } 35 }
// { dg-error "deleted function" "" { target *-*-* } 350 }
// { dg-error "deleted function" "" { target *-*-* } 348 }