export enum ScriptValueType {
    NUMBER = "number",
    IDENTIFIER = "identifier",
}

export interface NumberValue {
    readonly type: ScriptValueType.NUMBER,
    readonly value: number,
}
export function numberValue(value: number|string): NumberValue {
    if (typeof value === "string") {
        return {
            type: ScriptValueType.NUMBER,
            value: parseInt(value, 10),
        }
    } else {
        return {
            type: ScriptValueType.NUMBER,
            value,
        }
    }
}
export function isNumberValue(value: ScriptValue): value is NumberValue {
    return value.type === ScriptValueType.NUMBER
}

export interface ScriptIdentifier {
    readonly type: ScriptValueType.IDENTIFIER
    readonly value: string
}
export function identifier(value: string): ScriptIdentifier {
    return {
        type: ScriptValueType.IDENTIFIER,
        value
    }
}
export function isIdentifier(value: ScriptValue): value is ScriptIdentifier {
    return value.type === ScriptValueType.IDENTIFIER
}

export type ScriptValue = NumberValue|ScriptIdentifier