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V6035. Double negation is present in th…
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V6035. Double negation is present in the expression: !!x.

May 14 2018

Analyzer has detected a potential error related to double negation of a variable. Such duplication is confused, and, most likely, contains an error.

Consider the following example:

if (!(( !filter )))
{
  ....
}

This error most likely appeared during code refactoring. For example, a part of a complex logical expression was removed while the negation of the whole result wasn't. As a result, we've got an expression with an opposite meaning.

The fixed version of the code may look like this:

if ( filter )
{
  ....
}

or this:

if ( !filter )
{
  ....
}
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