c++ delete null pointer safe

delete will check if the pointer is NULL for you, so you're right that...

delete will check if the pointer is NULL for you, so you're right that the check isn't While it is safe now, it wasn't always:) so it's likely habitual.

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/7 says: If the value of the operand of the delete-expression is not a null...

/7 says: If the value of the operand of the delete-expression is not a null pointer value, the delete-expression will call a deallocation.

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First off, NULL is never a valid pointer value (in a hosted C++ program), a...

First off, NULL is never a valid pointer value (in a hosted C++ program), and so also check Is it safe to delete a NULL pointer? it may help you.

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Setting a pointer to 0 (which is "null" in standard C++, the NULL...

Setting a pointer to 0 (which is "null" in standard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.

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If you need safety there's a wide range of smart pointers at you servi...

If you need safety there's a wide range of smart pointers at you service of security if the pointer you specified for the delete got set to null, but.

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I guess I have a couple questions. Would it be a bad idea to just set every...

I guess I have a couple questions. Would it be a bad idea to just set every pointer to NULL after I delete the memory it points to?Linked List Delete List.

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void operator delete[] (void* ptr, const std::nothrow_t& nothrow_consta...

void operator delete[] (void* ptr, const std::nothrow_t& nothrow_constant) throw(); . If this is a null-pointer, the function does nothing. C++98 Exception safety.

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safe to delete null pointer?. C / C++ Forums on Bytes. Just learnt from my ...

safe to delete null pointer?. C / C++ Forums on Bytes. Just learnt from my co-worker that it's safe to delete a null pointer. I tried it on sun box.

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C++ language null pointer literal(C++11) If expression is not a null pointe...

C++ language null pointer literal(C++11) If expression is not a null pointer, the delete expression invokes the destructor (if any) for the.

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Type safety: malloc() returns a void* which isn't type safe. new Fred(...

Type safety: malloc() returns a void* which isn't type safe. new Fred() returns a pointer . Since deleting a null pointer is harmless by definition, a simple solution.

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Doing this will allow you to check whether the pointer can be safely derefe...

Doing this will allow you to check whether the pointer can be safely dereferenced, because a Note that trying to delete an already deleted null pointer is safe.

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Since C++14, in case of delete: If expression evaluates to a null pointer v...

Since C++14, in case of delete: If expression evaluates to a null pointer value, Deleting null pointer is safe but why would you like to use delete on null pointer? You should not write This is C++ not Java & C#. k Views ·

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Null-pointer checks are valuable on function arguments (including construct...

Null-pointer checks are valuable on function arguments (including constructor a faulty device used in a safety-critical application, so I would expect the .. though, note that calling free() or delete on a NULL in C and C++ is.

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C++ guarantees that the null pointer never points to valid data, so it ofte...

C++ guarantees that the null pointer never points to valid data, so it often is used to indicate Freeing Memory with delete Using new to request memory when you need it is just the more However, it is safe to apply delete to a null pointer.

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You do this by calling delete on the pointer. delete returns the memory to ...

You do this by calling delete on the pointer. delete returns the memory to the free store. It is critical to Calling delete on a null pointer is guaranteed to be safe.

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