2014-07-13 01:04:16 +02:00
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//// [assignmentCompatWithCallSignaturesWithOptionalParameters.ts]
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// call signatures in derived types must have the same or fewer optional parameters as the base type
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interface Base {
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a: () => number;
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a2: (x?: number) => number;
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a3: (x: number) => number;
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a4: (x: number, y?: number) => number;
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a5: (x?: number, y?: number) => number;
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a6: (x: number, y: number) => number;
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}
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var b: Base;
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var a: () => number;
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a = () => 1 // ok, same number of required params
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a = (x?: number) => 1; // ok, same number of required params
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a = (x: number) => 1; // error, too many required params
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a = b.a; // ok
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a = b.a2; // ok
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a = b.a3; // error
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a = b.a4; // error
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a = b.a5; // ok
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a = b.a6; // error
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var a2: (x?: number) => number;
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a2 = () => 1; // ok, same number of required params
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a2 = (x?: number) => 1; // ok, same number of required params
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a2 = (x: number) => 1; // ok, same number of params
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a2 = b.a; // ok
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a2 = b.a2; // ok
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a2 = b.a3; // ok, same number of params
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a2 = b.a4; // ok, excess params are optional in b.a3
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a2 = b.a5; // ok
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a2 = b.a6; // error
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var a3: (x: number) => number;
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a3 = () => 1; // ok, fewer required params
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a3 = (x?: number) => 1; // ok, fewer required params
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a3 = (x: number) => 1; // ok, same number of required params
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a3 = (x: number, y: number) => 1; // error, too many required params
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a3 = b.a; // ok
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a3 = b.a2; // ok
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a3 = b.a3; // ok
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a3 = b.a4; // ok
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a3 = b.a5; // ok
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a3 = b.a6; // error
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var a4: (x: number, y?: number) => number;
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a4 = () => 1; // ok, fewer required params
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a4 = (x?: number, y?: number) => 1; // ok, fewer required params
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a4 = (x: number) => 1; // ok, same number of required params
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a4 = (x: number, y: number) => 1; // ok, same number of params
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a4 = b.a; // ok
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a4 = b.a2; // ok
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a4 = b.a3; // ok
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a4 = b.a4; // ok
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a4 = b.a5; // ok
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a4 = b.a6; // ok, same number of params
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var a5: (x?: number, y?: number) => number;
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a5 = () => 1; // ok, fewer required params
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a5 = (x?: number, y?: number) => 1; // ok, fewer required params
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a5 = (x: number) => 1; // ok, fewer params in lambda
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a5 = (x: number, y: number) => 1; // ok, same number of params
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a5 = b.a; // ok
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a5 = b.a2; // ok
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a5 = b.a3; // ok, fewer params in b.a3
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a5 = b.a4; // ok, same number of params
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a5 = b.a5; // ok
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a5 = b.a6; // ok, same number of params
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//// [assignmentCompatWithCallSignaturesWithOptionalParameters.js]
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2014-08-19 19:43:13 +02:00
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// call signatures in derived types must have the same or fewer optional parameters as the base type
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2014-07-13 01:04:16 +02:00
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var b;
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var a;
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2014-08-16 00:49:09 +02:00
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a = function () { return 1; }; // ok, same number of required params
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a = function (x) { return 1; }; // ok, same number of required params
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a = function (x) { return 1; }; // error, too many required params
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a = b.a; // ok
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a = b.a2; // ok
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a = b.a3; // error
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a = b.a4; // error
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a = b.a5; // ok
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a = b.a6; // error
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2014-07-13 01:04:16 +02:00
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var a2;
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2014-08-16 00:49:09 +02:00
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a2 = function () { return 1; }; // ok, same number of required params
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a2 = function (x) { return 1; }; // ok, same number of required params
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a2 = function (x) { return 1; }; // ok, same number of params
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a2 = b.a; // ok
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a2 = b.a2; // ok
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a2 = b.a3; // ok, same number of params
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a2 = b.a4; // ok, excess params are optional in b.a3
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a2 = b.a5; // ok
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a2 = b.a6; // error
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2014-07-13 01:04:16 +02:00
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var a3;
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2014-08-16 00:49:09 +02:00
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a3 = function () { return 1; }; // ok, fewer required params
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a3 = function (x) { return 1; }; // ok, fewer required params
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a3 = function (x) { return 1; }; // ok, same number of required params
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a3 = function (x, y) { return 1; }; // error, too many required params
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a3 = b.a; // ok
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a3 = b.a2; // ok
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a3 = b.a3; // ok
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a3 = b.a4; // ok
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a3 = b.a5; // ok
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a3 = b.a6; // error
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2014-07-13 01:04:16 +02:00
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var a4;
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2014-08-16 00:49:09 +02:00
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a4 = function () { return 1; }; // ok, fewer required params
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a4 = function (x, y) { return 1; }; // ok, fewer required params
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a4 = function (x) { return 1; }; // ok, same number of required params
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a4 = function (x, y) { return 1; }; // ok, same number of params
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a4 = b.a; // ok
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a4 = b.a2; // ok
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a4 = b.a3; // ok
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a4 = b.a4; // ok
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a4 = b.a5; // ok
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a4 = b.a6; // ok, same number of params
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2014-07-13 01:04:16 +02:00
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var a5;
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2014-08-16 00:49:09 +02:00
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a5 = function () { return 1; }; // ok, fewer required params
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a5 = function (x, y) { return 1; }; // ok, fewer required params
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a5 = function (x) { return 1; }; // ok, fewer params in lambda
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a5 = function (x, y) { return 1; }; // ok, same number of params
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a5 = b.a; // ok
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a5 = b.a2; // ok
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a5 = b.a3; // ok, fewer params in b.a3
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a5 = b.a4; // ok, same number of params
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a5 = b.a5; // ok
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a5 = b.a6; // ok, same number of params
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