Как исправить ошибку not assignable to type 'string | number | symbol'?

Question

[HitGirl]

Здравствуйте!
В данной строке:

{[key in typeof parameters[number]['name']]: string | null}

возникает ошибка: TS2322: Type 'Names' is not assignable to type 'string | number | symbol'.
Подскажите, пожалуйста, как её исправить?

type RegexpParameter<Names> = {
    name:Names,
    type: 'd'|'w'|'ss'
}

function getParameters<Names>(substring:string,parameters:RegexpParameter<Names>[]):{[key in typeof parameters[number]['name']]: string | null}{
    const results:any= {}

    function getRegExp(type:RegexpParameter<any>['type']){
        switch (type){
            case "d": return '\\d+'
            case "w": return '\\w+'
            case "ss": return '[^,]+'
        }
    }
    parameters.forEach(value=>{

        const regexp = new RegExp(`(?<=${value.name}:\\s?)${getRegExp(value.type)}`,'g')
        const match = regexp[Symbol.match](substring)
        results[value.name]=match?match[0].trim():null;
    })

    return results
}

 const imgParameters:RegexpParameter<'w'|'h'|'c'|'p'>[] = [{name:'w',type:'d'},{name:'h',type:'d'},{name:'c',type:'ss'},{name:'p',type:'w'}]
 const {w:width,h:height,c:caption,p:priority} = getParameters(substrings[1],imgParameters)

Comments

[WbICHA]

Names extends string