TypeScript/tests/baselines/reference/genericCallWithinOwnBodyCastTypeParameterIdentity.js at 17cbccafbf523df5361ddba63a0f23d4a67488aa · weswigham/TypeScript · GitHub

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//// [tests/cases/compiler/genericCallWithinOwnBodyCastTypeParameterIdentity.ts] ////

//// [genericCallWithinOwnBodyCastTypeParameterIdentity.ts]
interface Thenable<Value> {
    then<V>(
        onFulfilled: (value: Value) => V | Thenable<V>,
    ): Thenable<V>;
}

const toThenable = <Result, Input>(fn: (input: Input) => Result | Thenable<Result>) =>
    (input: Input): Thenable<Result> => {
        const result = fn(input)
        return {
            then<V>(onFulfilled: (value: Result) => V | Thenable<V>) {
                return toThenable<V, Result>(onFulfilled)(result as Result)
            }
        };
    }

const toThenableInferred = <Result, Input>(fn: (input: Input) => Result | Thenable<Result>) =>
    (input: Input): Thenable<Result> => {
        const result = fn(input)
        return {
            then(onFulfilled) {
                return toThenableInferred(onFulfilled)(result as Result)
            }
        };
    }


//// [genericCallWithinOwnBodyCastTypeParameterIdentity.js]
"use strict";
var toThenable = function (fn) {
    return function (input) {
        var result = fn(input);
        return {
            then: function (onFulfilled) {
                return toThenable(onFulfilled)(result);
            }
        };
    };
};
var toThenableInferred = function (fn) {
    return function (input) {
        var result = fn(input);
        return {
            then: function (onFulfilled) {
                return toThenableInferred(onFulfilled)(result);
            }
        };
    };
};