46 lines
1.7 KiB
Plaintext
46 lines
1.7 KiB
Plaintext
==== tests/cases/conformance/expressions/binaryOperators/additionOperator/additionOperatorWithNullValueAndInvalidOperator.ts (11 errors) ====
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// If one operand is the null or undefined value, it is treated as having the type of the other operand.
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function foo(): void { return undefined }
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var a: boolean;
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var b: Object;
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var c: void;
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var d: Number;
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// null + boolean/Object
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var r1 = null + a;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'boolean' and 'boolean'.
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var r2 = null + b;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'Object' and 'Object'.
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var r3 = null + c;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'void' and 'void'.
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var r4 = a + null;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'boolean' and 'boolean'.
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var r5 = b + null;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'Object' and 'Object'.
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var r6 = null + c;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'void' and 'void'.
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// other cases
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var r7 = null + d;
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~~~~~~~~
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!!! Operator '+' cannot be applied to types 'Number' and 'Number'.
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var r8 = null + true;
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~~~~~~~~~~~
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!!! Operator '+' cannot be applied to types 'boolean' and 'boolean'.
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var r9 = null + { a: '' };
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~~~~~~~~~~~~~~~~
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!!! Operator '+' cannot be applied to types '{ a: string; }' and '{ a: string; }'.
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var r10 = null + foo();
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~~~~~~~~~~~~
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!!! Operator '+' cannot be applied to types 'void' and 'void'.
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var r11 = null + (() => { });
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~~~~~~~~~~~~~~~~~~
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!!! Operator '+' cannot be applied to types '() => void' and '() => void'. |