Error Handling (wasm call)

When a compilation error occurs, it returns an error message with the following json structure w/ prefix([Error]:):

{
  "line": number,
  "column": number,
  "length": number,
  "message": string,
  "found": string,
}

EX)

[Error]:{"line":24, "column":10, "length":1, "message":"Expected -> or ~>", "found":"^"}

Therefore, you can handle it as follows in your TypeScript application:

parsePlayBookError.ts

export interface PlayBookError {
  line: number;
  column: number;
  length: number;
  message: string;
  found: string;
}

export function parsePlayBookError(
  errorString: string,
): PlayBookError | undefined {
  const prefix = "[Error]:";
  if (errorString.startsWith(prefix)) {
    try {
      const jsonString = errorString.substring(prefix.length);
      return JSON.parse(jsonString) as PlayBookError;
    } catch (e) {
      return undefined;
    }
  }
  return undefined;
}