Unchained

A fully type safe, compile time only units library. (by SciNim)

Unchained Alternatives

Similar projects and alternatives to Unchained

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better Unchained alternative or higher similarity.

Unchained reviews and mentions

Posts with mentions or reviews of Unchained. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-08-03.
  • GNU Units
    7 projects | news.ycombinator.com | 3 Aug 2023
    Anything with a finite (200 is small even) number of units misses the algebraic structure of the problem mentioned in https://news.ycombinator.com/item?id=36988497 wherein multiplying|dividing two things gives you a (potentially) new unit which implies an open ended "space" of units.

    To be concrete (hah!), in C++ a template meta-type with 12 signed integer parameters (6 numerators & 6 denominators for rational exponents of SI base units) might be one way to model it.

    Unlike C++ template stuff, Nim macros (like Lisp macros) makes metaprogramming more like procedural programming - just against abstract syntax trees. I think that helps to shield some of this type complexity from users, but the documentation README https://github.com/SciNim/Unchained does better job than I can in an HN comment.

    Of course, for unit system conversion, the number of dimensions (6 in SI, 3 in CGS/Gaussian) changes. So, for full generality you need compile-time (if you want static type integration/CT errors) linear algebra over a rational field (at least & conventionally) to project|inverse project. That might be theoretically possible in C++. I would think it very un-fun and unlikely to ever have been done. There's probably a Mathematica package, though.

    7 projects | news.ycombinator.com | 3 Aug 2023
    Units of measure are, of course, the aboriginal type system for pre-software hand calculation.. carrying units along to make sure you do not add apples to oranges { unless you know how to convert "apples" to "oranges" for some adapted metaphorical fruits.. :-) }.

    Nim has sufficient compile-time strength that units can be integrated with the type system: https://github.com/SciNim/Unchained

  • Please Put Units in Names
    12 projects | news.ycombinator.com | 20 Mar 2022
  • Pint: Makes Units Easy -Python
    4 projects | news.ycombinator.com | 4 Sep 2021
  • Atlas, a (hopefully) better engineering IDE
    4 projects | news.ycombinator.com | 10 May 2021
    I've recently written a units library for Nim [0]. It's still WIP, but it's already proven extremely useful for me as a physicist.

    Thanks to Nim's strong type system and metaprogramming features, it allows for a fully compile time design, without any runtime overhead (in form of special unit objects or such things; everything is a `distinct float`).

    In addition Nim's unicode support, the code even looks nice!

    A more complex use case (I can link more if desired): [1]

    [0]: https://github.com/SciNim/Unchained/

    [1]: https://github.com/SciNim/Unchained/tree/master/examples

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    workos.com | 16 Apr 2024
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5
103
7.0
20 days ago
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