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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Feb 20, 2001



Application Security Testing: An Integral Part of DevOps

Avoid This Common ASSERT(...) Mistake

ASSERT is a very helpful macro for debugging, because it helps root out false assumptions. However, many programmers make the mistake of putting actual assignments inside the macro. Consider the following:
a = GetA();

It is tempting to collapse this code into a single line:
ASSERT((a = GetA()) != NULL);

This will only work in testing a DEBUG build of your code. When building release code, the ASSERT macro compiles to nothing, so the assignment:
a = GetA();

never happens, and can cause crashes.
Kevin Hsu
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