claerror.ts

export type ClaErrorType = {
    message: string;
    extensions: ClaErrorTypeExtension[];
    locations: ClaErrorTypeLineColumn[];
};

export type ClaErrorTypeExtension = {
    category: string;
};

export type ClaErrorTypeLineColumn = {
    line: number;
    column: number;
}[];

export class ClaError extends Error {
    private reasons: ClaErrorType[];

    constructor(reasons: ClaErrorType[]) {
        super(reasons.map(ClaError.formatClaError).join(', '));
        Object.setPrototypeOf(this, ClaError.prototype);
        this.reasons = reasons;
    }

    public static formatLineCol = (position: ClaErrorTypeLineColumn): string => {
        return `line ${position.line}, column ${position.column}`;
    };

    public static formatClaError = (reason: ClaErrorType): string => {
        const message = reason.message;
        const locations = reason.locations.map(ClaError.formatLineCol).join(', ');
        return `${message} on ${locations}`;
    };
}