File: indexSignaturesInferentialTyping.ts

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node-typescript 4.1.3-1
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function foo<T>(items: { [index: number]: T }): T { return undefined; }
function bar<T>(items: { [index: string]: T }): T { return undefined; }

var x1 = foo({ 0: 0, 1: 1 });       // type should be number
var x2 = bar({ 0: 0, 1: 1 });
var x3 = bar({ zero: 0, one: 1 });  // type should be number