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POIs it safe to check if a pointer is null, then dereference it in the same if statement?
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13782629
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2012-12-08T22:34:57.297
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2012-12-08T23:09:51.630
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2012-12-08T22:44:16.160
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text
Body
<p>Is the following code safe if a null pointer is passed in?</p> <pre><code>if(ptr && *ptr == value) { //do something } </code></pre> <p>Does the order of the checks matter? Does it work if I change it to this?</p> <pre><code>if(*ptr == value && ptr) { //do something } </code></pre>
Tags
<c++><c><pointers><conditional-statements>
Title
Is it safe to check if a pointer is null, then dereference it in the same if statement?
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1. USElliot Hatch
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1. COI've edited the question title to clarify that by "valid pointer" I meant "not-null".
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