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[libcalamares] Extend the Deleter-helper with "preserve"

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Sometimes you want to keep the thing around after all.
This commit is contained in:
Adriaan de Groot 2020-10-30 14:47:30 +01:00
parent 7659dfdb9d
commit b72eba8157
1 changed files with 12 additions and 4 deletions
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10
src/libcalamares/utils/RAII.h
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@ -16,21 +16,29 @@
#include <type_traits> #include <type_traits>
/// @brief Convenience to zero out and deleteLater of any QObject-derived-class /** @brief Convenience to zero out and deleteLater of any QObject-derived-class
*
* If, before destruction, preserve is set to @c true, then
* the object is "preserved", and not deleted at all.
*/
template < typename T > template < typename T >
struct cqDeleter struct cqDeleter
{ {
T*& p; T*& p;
bool preserve = false;
~cqDeleter() ~cqDeleter()
{ {
static_assert( std::is_base_of< QObject, T >::value, "Not a QObject-class" ); static_assert( std::is_base_of< QObject, T >::value, "Not a QObject-class" );
if ( !preserve )
{
if ( p ) if ( p )
{ {
p->deleteLater(); p->deleteLater();
} }
p = nullptr; p = nullptr;
} }
}
}; };
/// @brief Sets a bool to @p value and resets to !value on destruction /// @brief Sets a bool to @p value and resets to !value on destruction