53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
==== tests/cases/compiler/optionalPropertiesTest.ts (4 errors) ====
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var x: {p1:number; p2?:string; p3?:{():number;};};
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interface IFoo
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{
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id: number;
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name?: string;
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print?(): void;
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}
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var foo: IFoo;
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foo = { id: 1234 }; // Ok
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foo = { id: 1234, name: "test" }; // Ok
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foo = { name: "test" }; // Error, id missing
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~~~
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!!! Type '{ name: string; }' is not assignable to type 'IFoo':
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!!! Property 'id' is missing in type '{ name: string; }'.
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foo = {id: 1234, print:()=>{}} // Ok
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var s = foo.name || "default";
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if (foo.print !== undefined) foo.print();
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interface i1 { M: () => void; };
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interface i2 { M?: () => void; };
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interface i3 { M: number; };
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interface i4 { M?: number; };
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var test1: i1 = {};
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~~~~~
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!!! Type '{}' is not assignable to type 'i1':
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!!! Property 'M' is missing in type '{}'.
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var test2: i3 = {};
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~~~~~
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!!! Type '{}' is not assignable to type 'i3':
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!!! Property 'M' is missing in type '{}'.
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var test3: i2 = {};
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var test4: i4 = {};
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var test5: i1 = { M: function () { } };
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var test6: i3 = { M: 5 };
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var test7: i2 = { M: function () { } };
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test7 = {};
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var test8: i4 = { M: 5 }
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test8 = {};
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var test9_1: i2;
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var test9_2: i1;
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test9_1 = test9_2;
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var test10_1: i1;
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var test10_2: i2;
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test10_1 = test10_2;
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~~~~~~~~
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!!! Type 'i2' is not assignable to type 'i1':
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!!! Required property 'M' cannot be reimplemented with optional property in 'i2'. |