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Add DISABLE_CLASS_COPY macro (and use it)

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Use this macro to disallow copying of an object using the assignment
operator or copy constructor.  This catches otherwise silent-but-deadly
mistakes such as "ServerMap map = env->getMap();" at compile time.

If so desired, it is still possible to copy a class, but it now requires
an explicit call to memcpy or std::copy.
This commit is contained in:
kwolekr 2015-10-27 02:51:43 -04:00
parent ca8e56c15a
commit c56d7fe0eb
11 changed files with 30 additions and 0 deletions
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8
src/basicmacros.h
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@ -30,4 +30,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define CONTAINS(c, v) (std::find((c).begin(), (c).end(), (v)) != (c).end())
// To disable copy constructors and assignment operations for some class
// 'Foobar', add the macro DISABLE_CLASS_COPY(Foobar) as a private member.
// Note this also disables copying for any classes derived from 'Foobar' as well
// as classes having a 'Foobar' member.
#define DISABLE_CLASS_COPY(C) \
C(const C &); \
C &operator=(const C &)
#endif