48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
==== tests/cases/compiler/defaultArgsInFunctionExpressions.ts (8 errors) ====
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var f = function (a = 3) { return a; }; // Type should be (a?: number) => number
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var n: number = f(4);
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n = f();
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var s: string = f('');
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~~
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!!! Argument of type 'string' is not assignable to parameter of type 'number'.
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s = f();
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~
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!!! Type 'number' is not assignable to type 'string'.
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// Type check the default argument with the type annotation
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var f2 = function (a: string = 3) { return a; }; // Should error, but be of type (a: string) => string;
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~~~~~~~~~~~~~
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!!! Type 'number' is not assignable to type 'string'.
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s = f2('');
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s = f2();
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n = f2();
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~
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!!! Type 'string' is not assignable to type 'number'.
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// Contextually type the default arg with the type annotation
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var f3 = function (a: (s: string) => any = (s) => <number>s) { };
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~~~~~~~~~
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!!! Neither type 'number' nor type 'string' is assignable to the other.
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// Type check using the function's contextual type
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var f4: (a: number) => void = function (a = "") { };
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~~~~~~
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!!! Type 'string' is not assignable to type 'number'.
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// Contextually type the default arg using the function's contextual type
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var f5: (a: (s: string) => any) => void = function (a = s => <number>s) { };
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~~~~~~~~~
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!!! Neither type 'number' nor type 'string' is assignable to the other.
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// Instantiated module
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module T { }
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module U {
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export var x;
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}
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var f6 = (t = T) => { };
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~
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!!! Cannot find name 'T'.
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var f7 = (t = U) => { return t; };
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f7().x; |