[C++] Ce se intampla daca dam delete la un pointer NULL?

[Ovidiu Cucu]

Intrebare: Ce se intampla daca dam delete la un pointer NULL?
Raspuns: Nu se intampla nimic.

NOTA: Teste gen

Code: Select all

    if(p != 0)
    {
        delete p;
    }

in cele mai multe cazuri nu fac decat sa complice codul.
Standardul de C++ spune urmatoarele:

...if the value of the operand of delete is the null pointer the operation has no effect.

Deci, testul de NULL dinaintea lui delete, nu are rost.

Resurse

• ISO/IEC 14882:2003 - 5.3.5 Delete

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