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V6104. A pattern was detected: A || (A …
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Contents

V6104. A pattern was detected: A || (A && ...). The expression is excessive or contains a logical error.

Dec. 29, 2020

The analyzer has detected an expression that can be reduced. Such redundancy may be a sign of a logical error.

Consider this example:

boolean firstCond, secondCond, thirdCond;
....
if (firstCond || (firstCond && thirdCond))
....

This expression is redundant. If 'firstCond == true', the condition will always be true regardless of what value the 'thirdCond' variable refers to; and if 'firstCond == false', the condition will always be false – again, irrespective of the 'thirdCond' variable. Thus, the expression 'firstCond || (firstCond && thirdCond)' can be simplified:

if (firstCond)

Perhaps the programmer made a mistake and wrote a wrong variable in the second subexpression. Then the correct version of this code should look like this:

if (firstCond || (secondCond && thirdCond))
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