76 lines
2.5 KiB
Plaintext
76 lines
2.5 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignatures.ts (8 errors) ====
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// void returning call signatures can be assigned a non-void returning call signature that otherwise matches
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interface T {
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(x: number): void;
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}
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var t: T;
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var a: { (x: number): void };
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t = a;
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a = t;
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interface S {
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(x: number): string;
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}
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var s: S;
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var a2: { (x: number): string };
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t = s;
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t = a2;
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a = s;
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a = a2;
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t = <T>(x: T) => 1;
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t = () => 1;
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t = function (x: number) { return ''; }
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a = <T>(x: T) => 1;
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a = () => 1;
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a = function (x: number) { return ''; }
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interface S2 {
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(x: string): void;
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}
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var s2: S2;
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var a3: { (x: string): void };
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// these are errors
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t = s2;
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~
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!!! Type 'S2' is not assignable to type 'T':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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t = a3;
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~
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!!! Type '(x: string) => void' is not assignable to type 'T':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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t = (x: string) => 1;
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~
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!!! Type '(x: string) => number' is not assignable to type 'T':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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t = function (x: string) { return ''; }
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~
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!!! Type '(x: string) => string' is not assignable to type 'T':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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a = s2;
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~
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!!! Type 'S2' is not assignable to type '(x: number) => void':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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a = a3;
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~
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!!! Type '(x: string) => void' is not assignable to type '(x: number) => void':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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a = (x: string) => 1;
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~
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!!! Type '(x: string) => number' is not assignable to type '(x: number) => void':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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a = function (x: string) { return ''; }
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~
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!!! Type '(x: string) => string' is not assignable to type '(x: number) => void':
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!!! Types of parameters 'x' and 'x' are incompatible:
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!!! Type 'string' is not assignable to type 'number'.
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