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Stackable streambuf cleanup needs to be per-instance.

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ADAM David Alan Martin
2023-10-18 01:43:05 -04:00
parent 1959ec7fdd
commit 8520b87689
1 changed files with 17 additions and 9 deletions
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26
Utility/StackableStreambuf.h
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@ -24,6 +24,7 @@ namespace Alepha::Hydrogen::Utility ::detail:: stackable_streambuf
inline namespace impl inline namespace impl
{ {
void releaseStack( std::ios_base &ios ); void releaseStack( std::ios_base &ios );
bool releaseTop( std::ostream &os );
void iosCallback( const std::ios_base::event event, std::ios_base &ios, const int idx ); void iosCallback( const std::ios_base::event event, std::ios_base &ios, const int idx );
} }
@ -68,19 +69,26 @@ namespace Alepha::Hydrogen::Utility ::detail:: stackable_streambuf
} }
}; };
inline bool
impl::releaseTop( std::ostream &os )
{
auto *const streambuf= os.rdbuf();
if( not streambuf ) return false;
auto *const stacked= dynamic_cast< StackableStreambuf * >( streambuf );
if( not stacked ) return false;
stacked->drain();
os.rdbuf( stacked->underlying );
delete stacked;
return true;
}
inline void inline void
impl::releaseStack( std::ios_base &ios ) impl::releaseStack( std::ios_base &ios )
{ {
auto &os= dynamic_cast< std::ostream & >( ios ); auto &os= dynamic_cast< std::ostream & >( ios );
auto *streambuf= os.rdbuf();
while( auto *stacked= dynamic_cast< StackableStreambuf * >( streambuf ) ) while( releaseTop( os ) );
{
streambuf= stacked->underlying;
stacked->drain();
os.rdbuf( stacked->underlying );
delete stacked;
}
} }
inline void inline void
@ -113,7 +121,7 @@ namespace Alepha::Hydrogen::Utility ::detail:: stackable_streambuf
std::ostream & std::ostream &
operator << ( std::ostream &os, PopStack< T > ) operator << ( std::ostream &os, PopStack< T > )
{ {
releaseStack( os ); if( not releaseTop( os ) ) throw std::logic_error( "OStream has no stacked streambufs!" );
return os; return os;
} }