tie_fp

Description:

tie fp

Tie FP #
A simple package that provides a class Result along with its subclasses Success and Failure. This package is designed to handle success and failure scenarios in a concise and type-safe manner.
This package is inspired but not based in:

Result - Rust
Error - Go
Abseil Status - C++

Fundamentals #
All Functions and Futures are error-prone making it difficult to make sure if anything went wrong without writing a lot of boilerplate with the try-catch scenarios.
The Result class tries to avoid these by using extensions and wrapping everything giving you only a isError() method to make sure the result of the computation, and avoiding the rethrow step.
If you need to perform operations that potentially throw an error you can do this:

Result<void> myFunction(){

try {
operation1();
operation2();
return Success(null);
} catch(Exception exception, StackTrace stackTrace){
return Failure(exception,stackTrace);
}
}

void main(){

final result= myFunction();
if(result.isError()){
/// perform something
return;
}

}
copied to clipboard
If you want to wrap a Function you can do this:
int operation() => 1;

void main(){
Result<int> result = Result.wrapFunction(operation());
}
copied to clipboard
which is the equivalent of
try{
final v=operation();
return Success(v);
} catch(Exception exception, StackTrace stackTrace){
return Failure(exception,stackTrace);
}

copied to clipboard
In the case of a Future the toResult() method is useful:
@override
Future<Result<Ride>> detailed(int id) => supabase
.from(table)
.select("*, user:profiles(*), vehicle(*) ")
.eq('id', id)
.limit(1)
.single()
.then((value) => Ride.fromMap(value))
.toResult();
copied to clipboard
Conclusion #
The Result package simplifies the handling of success and failure scenarios by providing a sealed class that encapsulates the result and error information. It enables you to write cleaner and more robust code when dealing with operations that can succeed or fail.
We hope you find this package useful in your Dart projects! If you have any questions or feedback, please don't hesitate to reach out.