2014-09-12 22:35:07 +02:00
tests/cases/compiler/genericConstraint2.ts(5,18): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
2014-10-28 08:28:59 +01:00
tests/cases/compiler/genericConstraint2.ts(11,7): error TS2420: Class 'ComparableString' incorrectly implements interface 'Comparable<string>'.
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Property 'comparer' is missing in type 'ComparableString'.
2014-10-22 00:32:45 +02:00
tests/cases/compiler/genericConstraint2.ts(21,17): error TS2344: Type 'ComparableString' does not satisfy the constraint 'Comparable<any>'.
2014-09-12 22:35:07 +02:00
2014-07-13 01:04:16 +02:00
==== tests/cases/compiler/genericConstraint2.ts (3 errors) ====
interface Comparable<T> {
comparer(other: T): number;
}
function compare<T extends Comparable<T>>(x: T, y: T): number {
~~~~~~~~~~~~~~~~~~~~~~~
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!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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if (x == null) return y == null ? 0 : -1;
if (y == null) return 1;
return x.comparer(y);
}
class ComparableString implements Comparable<string>{
~~~~~~~~~~~~~~~~
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!!! error TS2420: Class 'ComparableString' incorrectly implements interface 'Comparable<string>'.
!!! error TS2420: Property 'comparer' is missing in type 'ComparableString'.
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constructor(public currentValue: string) { }
localeCompare(other) {
return 0;
}
}
var a = new ComparableString("a");
var b = new ComparableString("b");
var c = compare<ComparableString>(a, b);
~~~~~~~~~~~~~~~~
2014-10-22 00:32:45 +02:00
!!! error TS2344: Type 'ComparableString' does not satisfy the constraint 'Comparable<any>'.