83 lines
No EOL
3 KiB
Text
83 lines
No EOL
3 KiB
Text
==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithConstructSignatures2.ts (12 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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f: new (x: number) => void;
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}
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var t: T;
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var a: { f: new (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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f: new (x: number) => string;
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}
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var s: S;
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var a2: { f: new (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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// errors
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t = () => 1;
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~
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!!! Type '() => number' is not assignable to type 'T':
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!!! Property 'f' is missing in type '() => number'.
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t = function (x: number) { return ''; }
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~
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!!! Type '(x: number) => string' is not assignable to type 'T':
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!!! Property 'f' is missing in type '(x: number) => string'.
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a = () => 1;
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~
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!!! Type '() => number' is not assignable to type '{ f: new (x: number) => void; }':
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!!! Property 'f' is missing in type '() => number'.
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a = function (x: number) { return ''; }
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~
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!!! Type '(x: number) => string' is not assignable to type '{ f: new (x: number) => void; }':
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!!! Property 'f' is missing in type '(x: number) => string'.
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interface S2 {
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f(x: string): void;
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}
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var s2: S2;
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var a3: { f(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 property 'f' are incompatible:
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!!! Type '(x: string) => void' is not assignable to type 'new (x: number) => void'.
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t = a3;
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~
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!!! Type '{ f(x: string): void; }' is not assignable to type 'T':
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!!! Types of property 'f' are incompatible:
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!!! Type '(x: string) => void' is not assignable to type 'new (x: number) => void'.
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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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!!! Property 'f' is missing in type '(x: string) => 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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!!! Property 'f' is missing in type '(x: string) => string'.
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a = s2;
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~
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!!! Type 'S2' is not assignable to type '{ f: new (x: number) => void; }':
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!!! Types of property 'f' are incompatible:
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!!! Type '(x: string) => void' is not assignable to type 'new (x: number) => void'.
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a = a3;
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~
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!!! Type '{ f(x: string): void; }' is not assignable to type '{ f: new (x: number) => void; }':
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!!! Types of property 'f' are incompatible:
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!!! Type '(x: string) => void' is not assignable to type 'new (x: number) => void'.
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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 '{ f: new (x: number) => void; }':
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!!! Property 'f' is missing in type '(x: string) => 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 '{ f: new (x: number) => void; }':
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!!! Property 'f' is missing in type '(x: string) => string'.
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