CodeQL library for C#
codeql/csharp-all 0.9.0 (changelog, source)
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Predicate Internal::nullValueImpliedBinary

Holds if expression e3 is a null value whenever e1 and e2 are.

Import path

import semmle.code.csharp.controlflow.Guards
predicate nullValueImpliedBinary(Expr e1, Expr e2, Expr e3)