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hotpotato's Introduction

Hotpotato

Release (https://jatcwang.github.io/hotpotato/)

A type-safe and flexible error handling library for Scala, based on Shapeless Coproducts.

Head over to the Microsite for documentation and examples!

Quick Installation

libraryDependencies += "com.github.jatcwang" %% "hotpotato-core" % LATEST_VERSION

Warning about using this in production codebases

This project was developed to explore what a correct, type-safe and ergonomic error handling would look like in Scala. Due to its heavy use of shapeless machinery, using this in a production codebase may significantly increase your compile time. Be warned!

Contributing

All issues and PRs are very welcome (including major changes to the library design/API since we're at the early stages).

This project uses sbt-boilerplate plugin to generate functions of different arity. If you cannot find a source file, it may be generated and lives under core/src/main/boilerplate (or other boilerplate directories)

hotpotato's People

Contributors

guymers avatar jatcwang avatar scala-steward avatar

Stargazers

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Watchers

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Forkers

zainab-ali scala-steward gitter-badger guymers xuzhou911

hotpotato's Issues

Allow handler for error transformation to allow for code reuse 

io.mapErrorSome(
  (_: E3) => "commonprefix-e3",
  (_: E2) => "common-prefix-e2",
)

In the above example, it's difficult to share logic between the two transformation functions. Ideally we can provide a single handler (similar to directly using leftMap and pattern match on the coproduct yourself, but hopefully with better ergonomics.

io.mapErrorSome(
  handler {
    .. handle E3 and E2
  }
)

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