tokay-lang / tokay

Tokay is a programming language designed for ad-hoc parsing, inspired by awk.

https://tokay.dev

MIT License

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Enforcing `void` value paradigm #82

Open phorward opened 2 years ago

phorward commented 2 years ago

Similar to JavaScript, Tokay has two atomics to define an empty value.

void is intended to define a value which isn't there
null is a defined empty value

This concept is currently not enforced in Tokay. Here's an example:

dict_pop (#75) does it right, and returns a default (defaults to void) in case a value doesn't exist
list_pop (e9e63f5ce41ef73ee5d44789faa96e514c477e00) does it wrong, and throws an error when trying to pop something off an empty list

There are several more, related methods currently available. General rules relating void:

void shall be returned when it doesn't exist
when something is set to void, it shall be removed, emptied or similar

phorward commented 2 years ago

80 entirely enforces this paradigm, setting an item to void removes it, a non-existing item produces void.