Simple Functional Effects with Tag Unions • Richard Feldman • YOW! 2022

Simple functional effects with tag unions, simplifying error handling and pattern matching in programming, including ROC and Rust implementations.

Key takeaways

Tag unions in ROC are used to simplify error handling and pattern matching.
They can be used to track the different effects of an operation and accumulate errors.
Anonymous subtypes can be used to create new types that are not declared explicitly.
Pattern matching can be used to check for exhaustiveness and ensure that all possible cases are handled.
The question mark operator can be used to short circuit early returns in pattern matching.
Tag unions can have payloads and anonymous subtypes can be used to create new types.
The pipe syntax can be used to chain operations together and verify that the result is what is expected.
The task type is similar to the result type in Rust, but it can be used to track the different effects of an operation and accumulate errors.
Error accumulation works by associating each error with an error type, which allows errors to be tracked and reported.
Error handling can be simplified by using tag unions and pattern matching.
The map function can be used to map over a collection of errors and accumulate them.
The await operator can be used to wait for the result of an operation before proceeding.
The tags concept in ROC is used to track the different effects of an operation and accumulate errors.
The task type can be used to track the different effects of an operation and accumulate errors.
The pipe syntax can be used to chain operations together and verify that the result is what is expected.
The match statement can be used to check for exhaustiveness and ensure that all possible cases are handled.
The result type in Rust can be used to track the different effects of an operation and accumulate errors.
Error handling can be simplified by using the result type in Rust.
The map function can be used to map over a collection of errors and accumulate them.
The await operator can be used to wait for the result of an operation before proceeding.
The tags concept in ROC is used to track the different effects of an operation and accumulate errors.
The task type can be used to track the different effects of an operation and accumulate errors.
The pipe syntax can be used to chain operations together and verify that the result is what is expected.
The match statement can be used to check for exhaustiveness and ensure that all possible cases are handled.
Error handling can be simplified by using the match statement.
The simple syntax can be used to simplify error handling and pattern matching.
The tag concept in ROC is used to track the different effects of an operation and accumulate errors.

Simple Functional Effects with Tag Unions • Richard Feldman • YOW! 2022

More talks