Mismatch between generic types

When working with this code, I encounter a syntax error at m1 and m2. The error message states:

Type 'T' is not assignable to Type 'boolean'
or
Type 'T' is not assignable to Type 'string'

interface customMethod {
    <T>(param: T): customizedObject<T>;
}

class customizedObject<T> {

    constructor(private value: T) {
    }

}

var m1: customMethod = function (param : boolean) {

    return new customizedObject(param);
}

var m2: customMethod = function (param: string) {

    return new customizedObject(param);
}

Is there a solution for this issue?

Answer №1

The signature specified by myMethod is generic, therefore only a generic function can fulfill the requirements of the signature, or one that substitutes T with any other type:

var method1: myMethod = function <T>(param : T) {

    return new myObject(param);
}
// It functions properly but I do not recommend it.
var method2: myMethod = function (param : any) {

    return new myObject(param);
}

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