This set of helpers allows treating Result and Opt as collections of 0
or 1 item, allowing iterating over them and checking "membership" - such
integration is useful in generic code which can then be generalised to
handle more complex cases - the integration is most useful with Opt.
One design tradeoff here is the "explicitness" of `items` vs `values`
for `Result` - technically error and value are "equal" and therefore we
shouldn't give preference to the value, but there exists a convenience
argument to treat the value as the "default" and therefore define
`items` / `contains` for `Result` as well - this PR chooses the more
conservative and explicit approach - a more liberal version can easily
be added later should motivating examples emerge.
For serialization and parsing, distinguishing enums with numeric values
from enums with associated strings for each value is useful. This adds
foundational helpers to allow such distinction.
Add `optError`, `optValue`, to convert back and forth between Opt and Result
These conversions end up being more common than others since "trivial" success/fail-style API often use Opt while combining such API into combined operations tends to prefer richer error reporting.
These two helpers complete `valueOr` and `errorOr` to cover `void` cases
where no value should be returned or `Result[void, E]` /
`Result[T, void]` is being used - they can be used for a convient
early-return style in side-effectful proc:s:
```nim
v.update().isOkOr:
echo "update failed: ", error
```
* Add API call from a (slight) future 1.6 branch with when guards to
deactivate as per claim here
https://github.com/status-im/nim-codex/pull/346#issuecomment-1432073926
that this (or something very near it) is where it belongs.
* I also cannot find any `shims/parse` import. See discussion here:
https://github.com/status-im/nim-stew/pull/173
So, rename module to match upstream Nim stdlib.
If anyone complains, re-create `parse.nim` that simply does import
& re-export parseutils & self-deprecates.
* Added `IntervalSet`, sets of non-adjacent intervals
Relocated from nimbus-eth1 snap sync development
* Fix local import directive
* Fix --styleCheck complaints
* Attempt to get around CI problem by varying items
details:
Vary all_tests exec list
Hide useless globalness of `noisy` constant in non-debugging mode
Jacek Sieka
tersec
Etan Kissling
diegomrsantos
c-blake
jangko
Eugene Kabanov
Bung
Zahary Karadjov
Jordan Hrycaj
Tanguy
Lorenzo Delgado
Tanguy
Miran
Zahary Karadjov