API reference / @evolu/common / Result / trySync

Function: trySync()

function trySync<T, E>(fn, mapError): Result<T, E>;

Defined in: packages/common/src/Result.ts:521

Wraps synchronous functions that may throw exceptions, returning a Result.

The trySync function is designed to handle synchronous code safely by wrapping the execution in a try-catch block. If the function succeeds, it returns an Ok result. If an exception is thrown, it maps the error to a custom type and returns an Err result.

Example

interface ParseJsonError {
  readonly type: "ParseJsonError";
  readonly message: string;
}

const parseJson = (value: string): Result<unknown, ParseJsonError> =>
  trySync(
    () => JSON.parse(value) as unknown,
    (error): ParseJsonError => ({
      type: "ParseJsonError",
      message: String(error),
    }),
  );

Type Parameters

Parameters

Returns

Result<T, E>