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V3011. Two opposite conditions were enc…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
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Additional information
Contents

V3011. Two opposite conditions were encountered. The second condition is always false.

Dec 14 2015

The analyzer has detected a potential logical error: two conditional statements executed in sequence contain mutually exclusive conditions.

Examples of such conditions:

  • "A == B" and "A != B";
  • "A > B" and "A <= B";
  • "A < B" and "B < A";
  • and so on.

This error can occur as a result of a typo or bad refactoring.

Consider the following example of incorrect code:

if (x == y)
  if (y != x)
    DoSomething(x, y);

In this fragment, the 'DoSomething' method will never be called because the second condition will always be false when the first one is true. One of the variables used in the comparison is probably wrong. In the second condition, for example, variable 'z' should have been used instead of 'x':

if (x == y)
  if (y != z)
    DoSomething(x, y);

This diagnostic is classified as:

You can look at examples of errors detected by the V3011 diagnostic.

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