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POIs there any danger in calling free() or delete instead of delete[]?
 

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  1. POIs there any danger in calling free() or delete instead of delete[]?
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/1553382/-pod-freeing-memory-is-delete-equal-to-delete">( POD )freeing memory : is delete[] equal to delete ?</a> </p> </blockquote> <p>Does <code>delete</code> deallocate the elements beyond the first in an array?</p> <pre><code>char *s = new char[n]; delete s; </code></pre> <p>Does it matter in the above case seeing as all the elements of <code>s</code> are allocated contiguously, and it shouldn't be possible to <code>delete</code> only a portion of the array?</p> <p>For more complex types, would <code>delete</code> call the destructor of objects beyond the first one?</p> <pre><code>Object *p = new Object[n]; delete p; </code></pre> <p>How can <code>delete[]</code> deduce the number of <code>Object</code>s beyond the first, wouldn't this mean it must know the size of the allocated memory region? What if the memory region was allocated with some overhang for performance reasons? For example one could assume that not all allocators would provide a granularity of a single byte. Then any particular allocation could exceed the required size for each element by a whole element or more.</p> <p>For primitive types, such as <code>char</code>, <code>int</code>, is there any difference between:</p> <pre><code>int *p = new int[n]; delete p; delete[] p; free p; </code></pre> <p>Except for the routes taken by the respective calls through the <code>delete</code>-><code>free</code> deallocation machinery?</p>
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    1. USMatt Joiner
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    1. COi don't believe this is a duplicate, i'm asking some very specific different questions, and have no interest in assembly connotations
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      1. USMatt Joiner
    2. CONo, it is a duplicate. you are asking the *exact* same question "am I allowed to substitute delete for delete[]". And the answer is the same as in all the previous threads where the same was asked: "No, you are not. it is undefined behavior".
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    3. COIf you want to ask *other* questions (like "how does delete[] know how many objects to delete", then create a new question for that, give it its own title. So that others who want to ask the same will be able to find it.
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