Rust Welder

This repository contains experiments to implement a error handling concept for Rust. Presently it's not quite clear what the correct approach is.

Requirements

• Error representation in the result is word size (or maybe two word size). There is currently a trend for way too large errors (for instance IoResult) which really is not very good.
• Errors should contain location information about where the occurred. This needs to happen through macros and not runtime support because we're in a systems language :)
• Errors need to be able to wrap each other and convert between each other.
• It should be possible to mask errors and to respond to them. For this matter it's interesting to have a error kind associated that a caller can test for.