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src/utils/result.ffi.ts
import { type Result, Result$Error, Result$Ok } from "$/prelude.mjs";
export function toResult<T>(value: T | null | undefined): Result<T, undefined> {
return value === null || value === undefined
? Result$Error(undefined)
: Result$Ok(value);
}
export function indexToResult(index: number): Result<number, undefined> {
return index === -1 ? Result$Error(undefined) : Result$Ok(index);
}
function toError(value: unknown): Error {
return value instanceof Error
? value
: new Error(String(value), { cause: value });
}
toResult.fromThrows = function <T>(
throws: () => T,
): Result<T, Error> {
try {
return Result$Ok(throws());
} catch (error) {
return Result$Error(toError(error));
}
};
toResult.fromPromise = function <T>(
promise: Promise<T>,
): Promise<Result<T, Error>> {
return promise.then(
(value) => Result$Ok(value),
(error) => Result$Error(toError(error)),
);
};