tests/cases/conformance/expressions/unaryOperators/logicalNotOperator/logicalNotOperatorInvalidOperations.ts(5,17): error TS1005: ',' expected. tests/cases/conformance/expressions/unaryOperators/logicalNotOperator/logicalNotOperatorInvalidOperations.ts(5,18): error TS1109: Expression expected. tests/cases/conformance/expressions/unaryOperators/logicalNotOperator/logicalNotOperatorInvalidOperations.ts(8,16): error TS2365: Operator '+' cannot be applied to types 'boolean' and 'number'. tests/cases/conformance/expressions/unaryOperators/logicalNotOperator/logicalNotOperatorInvalidOperations.ts(11,16): error TS1109: Expression expected. ==== tests/cases/conformance/expressions/unaryOperators/logicalNotOperator/logicalNotOperatorInvalidOperations.ts (4 errors) ==== // Unary operator ! var b: number; // operand before ! var BOOLEAN1 = b!; //expect error ~ !!! error TS1005: ',' expected. ~ !!! error TS1109: Expression expected. // miss parentheses var BOOLEAN2 = !b + b; ~~~~~~ !!! error TS2365: Operator '+' cannot be applied to types 'boolean' and 'number'. // miss an operand var BOOLEAN3 =!; ~ !!! error TS1109: Expression expected.