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V3023. Consider inspecting this express…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V3023. Consider inspecting this expression. The expression is excessive or contains a misprint.

Dec. 14, 2015

The analyzer has detected a suspicious code fragment with a redundant comparison. There may be a superfluous check, in which case the expression can be simplified, or an error, which should be fixed.

Consider the following example:

if (firstVal == 3 && firstVal != 5)

This code is redundant as the condition will be true if 'firstVal == 3', so the second part of the expression just makes no sense.

There are two possible explanations here:

1) The second check is just unnecessary and the expression can be simplified. If so, the correct version of that code should look like this:

if (firstVal == 3)

2) There is a bug in the expression; the programmer wanted to use a different variable instead of 'firstVal'. Then the correct version of the code should look as follows:

if (firstVal == 3 && secondVal != 5)

This diagnostic is classified as:

You can look at examples of errors detected by the V3023 diagnostic.

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