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Reorder shared_ptr code so VC++ 6 member templates work, allowing polymorphic pointers to now work with that compiler (Gary Powell)

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[SVN r10548]
This commit is contained in:
Beman Dawes
2001-07-06 13:23:07 +00:00
parent c41b060618
commit 5fbc553611
1 changed files with 13 additions and 9 deletions
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22
include/boost/smart_ptr.hpp
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@@ -9,6 +9,8 @@
// See http://www.boost.org for most recent version including documentation. // See http://www.boost.org for most recent version including documentation.
// Revision History // Revision History
// 6 Jul 01 Reorder shared_ptr code so VC++ 6 member templates work, allowing
// polymorphic pointers to now work with that compiler (Gary Powell)
// 21 May 01 Require complete type where incomplete type is unsafe. // 21 May 01 Require complete type where incomplete type is unsafe.
// (suggested by Vladimir Prus) // (suggested by Vladimir Prus)
// 21 May 01 operator= fails if operand transitively owned by *this, as in a // 21 May 01 operator= fails if operand transitively owned by *this, as in a
@@ -136,16 +138,9 @@ template<typename T> class shared_ptr {
catch (...) { checked_delete(p); throw; } catch (...) { checked_delete(p); throw; }
} }
shared_ptr(const shared_ptr& r) : px(r.px) { ++*(pn = r.pn); } // never throws
~shared_ptr() { dispose(); } ~shared_ptr() { dispose(); }
shared_ptr& operator=(const shared_ptr& r) { #if !defined( BOOST_NO_MEMBER_TEMPLATES ) || defined (BOOST_MSVC6_MEMBER_TEMPLATES)
share(r.px,r.pn);
return *this;
}
#if !defined( BOOST_NO_MEMBER_TEMPLATES )
template<typename Y> template<typename Y>
shared_ptr(const shared_ptr<Y>& r) : px(r.px) { // never throws shared_ptr(const shared_ptr<Y>& r) : px(r.px) { // never throws
++*(pn = r.pn); ++*(pn = r.pn);
@@ -199,6 +194,15 @@ template<typename T> class shared_ptr {
#endif #endif
#endif #endif
// The assignment operator and the copy constructor must come after
// the templated versions for MSVC6 to work. (Gary Powell)
shared_ptr(const shared_ptr& r) : px(r.px) { ++*(pn = r.pn); } // never throws
shared_ptr& operator=(const shared_ptr& r) {
share(r.px,r.pn);
return *this;
}
void reset(T* p=0) { void reset(T* p=0) {
if ( px == p ) return; // fix: self-assignment safe if ( px == p ) return; // fix: self-assignment safe
if (--*pn == 0) { checked_delete(px); } if (--*pn == 0) { checked_delete(px); }
@@ -231,7 +235,7 @@ template<typename T> class shared_ptr {
// Tasteless as this may seem, making all members public allows member templates // Tasteless as this may seem, making all members public allows member templates
// to work in the absence of member template friends. (Matthew Langston) // to work in the absence of member template friends. (Matthew Langston)
// Don't split this line into two; that causes problems for some GCC 2.95.2 builds // Don't split this line into two; that causes problems for some GCC 2.95.2 builds
#if defined(BOOST_NO_MEMBER_TEMPLATES) || !defined( BOOST_NO_MEMBER_TEMPLATE_FRIENDS ) #if ( defined(BOOST_NO_MEMBER_TEMPLATES) && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) ) || !defined( BOOST_NO_MEMBER_TEMPLATE_FRIENDS )
private: private:
#endif #endif