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Error Handling #1

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rmhsilva opened this issue May 6, 2020 · 1 comment

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rmhsilva commented May 6, 2020

Currently, errors in Python/Teal cause everything to halt and fail - you have to restart the program.

Teal needs a condition signalling/exception handling mechanism.

This has two parts

the machine instructions (register condition handler, signal condition)
the teal special forms to declare handlers/restarts, and signal conditions.

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rmhsilva commented Aug 26, 2020

Preliminary thoughts

"boxed error" return types (like Rust, Haskell, others). Requires syntax and support for "proper" types.
condition handlers (exceptions, or generic "signals" as in Common Lisp / R). Fairly easy to implement here.

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