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add Perl use as prior art

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Valentin Gagarin 2023-06-01 19:51:39 +02:00
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rfcs/0137-nix-language-version.md
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@ -155,6 +155,7 @@ Once the language version is accessible though, tooling can at least be adapted
<details><summary>Arguments</summary> <details><summary>Arguments</summary>
- (+) Will prevent older evaluators from evaluating expressions written in a newer language version following this proposal (no forward compatibility) - (+) Will prevent older evaluators from evaluating expressions written in a newer language version following this proposal (no forward compatibility)
- (+) Precedent: [Perl `use VERSION`]
- (-) The errors on older evaluators will be opaque - (-) The errors on older evaluators will be opaque
- (+) Syntax can be made self-describing and human-readable to alleviate that to some extent - (+) Syntax can be made self-describing and human-readable to alleviate that to some extent
- (-) The syntax has to be fixed forever if one wanted to provide meaningful errors on language upgrades - (-) The syntax has to be fixed forever if one wanted to provide meaningful errors on language upgrades
@ -613,6 +614,12 @@ warning: The following deprecated features were used:
# Prior art # Prior art
- [Perl `use VERSION`]
[Perl `use VERSION`]: https://perldoc.perl.org/functions/use#use-VERSION
Many similarities, with versions declared per file and having to deal with interoperability.
- [Rust `edition` field] - [Rust `edition` field]
Rust has an easier problem to solve. Rust has an easier problem to solve.