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V3030. Recurring check. This condition …
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

V3030. Recurring check. This condition was already verified in previous line.

Dec 14 2015

The analyzer has detected a possible error that has to do with one and the same condition being checked twice.

Consider the following two examples:

// Example N1:
if (A == B)
{
  if (A == B)
    ....
}

// Example N2:
if (A == B) {
} else {
  if (A == B)
    ....
}

The second "if (A == B)" condition is always true in the first case and always false in the second.

This code is very likely to contain an error – for example a wrong variable name is used because of a typo. Correct versions of the examples above should look like this:

// Example N1:
if (A == B)
{
  if (A == C)
    ....
}

// Example N2:
if (A == B) {
} else {
  if (A == C)
    ....
}

This diagnostic is classified as:

You can look at examples of errors detected by the V3030 diagnostic.

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