Double negatives (DoubleNegatives)

Type	Scope	Severity	Activated by default	Minutes to fix	Tags
Code smell	BSL OS	Major	Yes	3	brainoverload badpractice

Description

Using double negatives makes the code harder to understand and can lead to errors when the developer mentally computes False instead of True, or vice versa. It is recommended to replace double negatives with conditional expressions that directly express the author's intentions.

Examples

Incorrect

If Not ValueTable.Find(SearchValue, "Column") <> Undefined Then
    // Do the action
EndIf;

Correct

If ValueTable.Find(LookupValue, "Column") = Undefined Then
    // Perform action
EndIf;

Sources

• Source: Remove double negative

Snippets

Diagnostic ignorance in code

// BSLLS:DoubleNegatives-off
// BSLLS:DoubleNegatives-on

Parameter for config

"DoubleNegatives": false