Examples that binds a '!' token to a function that attempts to do a boolean 'not': JumpTable.MapPreUnary({ return !A; }); JumpTable.MapPreUnary({ if (Ctxt->IsBooleanNotOpEnabled()) { return !A; } else { return A; } }); JumpTable.MapPreUnary(-> FExpressionResult { if (Ctxt->IsBooleanNotOpEnabled())