nickel 1.7.0

[BrewTestBot]

Created by brew bump

---

Created with brew bump-formula-pr.

release notes

Version 1.7 (2024-06-11)
========================
Nickel 1.7 ships with several extensions to pattern matching which was introduced in Nickel 1.5 but had a number of limitations. See below for further details.
Additionally, the publication of Topiary to the crates registry makes it so that all versions of Nickel from 1.7 and onward, however they are built, ship with nickel format and the language server formatting command working out of the box without needing a separate installation of Topiary (which was previously required when installing from crates.io using cargo install nickel-lang-cli or cargo install nickel-lang-lsp).
Breaking changes


Although primitive operators are internal and aren't officially part of any stability guarantee, some libraries sometimes need to resort to using them, when there's no equivalent in the stdlib. Nickel 1.7 had a big primop refactoring, amounting mostly to renaming. If you're using primops, please look at the corresponding pull request


The behavior of destructuring has been changed to match exactly the behavior of pattern matching. While there should be no difference on well-behaving programs, this change makes destructuring stricter and can lead to some programs that were running fine before 1.7 to now fail with unmatched pattern. The typical example is when destructuring a record with a field that is not present: let {x,y, ..} = import "lib.ncl" in. If x is absent from the lib.ncl but is never used anywhere, this used to work fine before 1.7 (the error would only trigger upon usage of x) but will now fail eagerly.
If you need to fix a large codebase with long import destructuring chains and you don't know which fields are the offending ones, one possible technique is to open the importing file in an editor and use the goto definition command of the NLS on each field of a faulty pattern. If it works, the field is present, but if it doesn't, the field might be faulty. You can also apply a record contract mimicking the structure of the pattern to the import "..." expression to get better error reporting.


Core language

Patterns now support constant values (1, null, "a", etc.), array

patterns ([fst, snd, ..tail]), pattern guards ('Foo x if std.is_number x), wildcard patterns (_ placeholder) and or-patterns (('Foo x) or ('Bar x) or ('Baz x)): (see the syntax section of the manual for more details)

Implement wildcard patterns by @yannham in Wildcard patterns tweag/nickel#1904
Implement constant patterns by @yannham in Add support for constant patterns tweag/nickel#1897
Implement pattern guards by @yannham in Implement pattern guards tweag/nickel#1910
Implement array patterns by @yannham in Implement array patterns tweag/nickel#1912
Implement or-patterns by @yannham in Or patterns tweag/nickel#1916


Uniformize destruct and pattern matching logic by @yannham in Uniformize destruct and pattern matching logic tweag/nickel#1907
Opaque values by @jneem in Opaque values tweag/nickel#1913

Stdlib

Add record.get_or to get value from record supplying default value by @olorin37 in Add get value from record with supplying default tweag/nickel#1920
[Fix] Avoid record.get_or failing on field without definition by @yannham in [Fix] Avoid record.get_or failing on field without definition tweag/nickel#1946
Add stdlib function array.at_or by @olorin37 in Add stdlib function array.at_or tweag/nickel#1927
Add std.enum.(from/to)_tag_and_arg and std.enum.map to dynamically decompose and recompose an enum by @yannham in Add from/to_tag_and_arg tweag/nickel#1939
Add std.test module with Assert and assert_all function to testing by @ajbt200128 in chore: add assert to the stdlib tweag/nickel#1914

Documentation

Fix typo in BlameError documentation by @ErinvanderVeen in Fix typo in BlameError documentation tweag/nickel#1899
Update README.md for nix profile install by @cloudyluna in Update README.md for nix profile install tweag/nickel#1918

LSP

Tell NLS about variable bindings in match statements by @jneem in Tell lsp about variable bindings in match statements tweag/nickel#1926
Add --version support to NLS and fix feature unification issues by @yannham in Add --version support to NLS and fix feature unification issues tweag/nickel#1936
Fix NLS crash and better refresh diagnostics by @jneem in Fix nls crash, and better refresh diagnostics. tweag/nickel#1944

Tooling

Include field path in non serializable error by @yannham in Include field path in non serializable error tweag/nickel#1905
Allow single input to nickel xxx command to be JSON, YAML or TOML as well by @olorin37 in Remove different behaviour when single input tweag/nickel#1902
Use Topiary's published crates over git to always enable formatting by @ErinvanderVeen in use topiary's published crates over git tweag/nickel#1919

New Contributors

@olorin37 made their first contribution in Remove different behaviour when single input tweag/nickel#1902
@cloudyluna made their first contribution in Update README.md for nix profile install tweag/nickel#1918
@ajbt200128 made their first contribution in chore: add assert to the stdlib tweag/nickel#1914

Full Changelog: tweag/nickel@1.6.0...1.7.0

[chenrui333]

Minitest::Assertion: Expected /1\.7\.0/ to match "nickel-lang-cli nickel 1.6.0 (rev Homebre)\n".

---

• [release.sh] update to 1.7.0 tweag/nickel#1951

[github-actions]

🤖 An automated task has requested bottles to be published to this PR.