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path: root/runtime/lua/vim/iter.lua
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* ci(lua): enable annotation and style checksLewis Russell2026-09-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: - annotation-usage-error and code-style-check are disabled. - vim.inspect relies on a dummy self-assignment for docgen, and its help omits parameter and option details. - LuaLS fallback types obscure iterator inference. - Docgen hardcodes public function names and appends separately sorted files, leaving shared helpers under the inspector heading. Solution: - Enable annotation-usage-error and code-style-check, and fix misplaced annotations. - Document vim.inspect's callable module directly, removing the dummy assignment. Describe its parameters, option defaults and process callback. - Remove LuaLS iterator fallbacks, correct iterator signatures and check values that the improved inference identifies as optional. - Parse callable modules, require bindings and parent module references. Derive public names and inherited function docs from these links, including missing help for vim.async.semaphore() and vim.version(). - Export vim.lsp.tagfunc directly with lazy loading and document its implementation instead of maintaining a wrapper. - Group files in section_order, replacing append_only and merge_files. Merge declarations before sorting each section, placing shared helpers in the main vim section and keeping vim.inspect in alphabetical order. - Add basic parser coverage for callable modules and module links. AI-assisted
* fix(lua): enable param-type-mismatch diagnosticLewis Russell2026-09-28
| | | | | | | | | Problem: Argument type mismatches are excluded from EmmyLua checks. Solution: Correct runtime annotations and calls, document local checker workarounds, and enable the diagnostic. AI-assisted
* fix(lua): add missing param annotations (#41911)Lewis Russell2026-09-15
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* build: enable more EmmyLua checksLewis Russell2026-09-09
| | | | | | | | | | Enable checks for unused code, deprecated calls, return types, and annotations. Fix the warnings and replace the deprecated highlight function. Keep exceptions where old APIs are still needed or the checker gets it wrong. AI-assisted
* build: enable more EmmyLua checksLewis Russell2026-09-08
| | | | | | | | | | | | | | | | - call-non-callable - missing-fields - redefined-label - redefined-local - undefined-field - unreachable-code Promote redefined-local and unreachable-code to warnings. Fix DOS line-ending handling for multiline semantic tokens, and support intersection types in the help parser. AI-assisted
* build: replace LuaLS with EmmyLuaLewis Russell2026-09-07
| | | | | | | | | | | | | | | Problem: LuaLS struggles with the generics used in Nvim's runtime, requiring broad diagnostic suppressions. Indexing is also slow. Solution: Use EmmyLua for type checks in the build and CI. It offers more sophisticated type checking, substantially better support for generics, and much better flow analysis. Correct the affected annotations. Use `@internal`, supported directly by EmmyLua, instead of `@nodoc` for shared internal declarations, and support it in the help parser. AI-assisted
* fix(iter): keep take() predicate within bounds #41635Volodymyr Chernetskyi2026-09-03
| | | | | | | | | | | | | Problem: `IterArray:take()` iterates up to `self._tail`, but `_tail` is exclusive. When no element fails the predicate, the loop reads one index past the last element and calls the predicate with `nil`. Solution: Stop at `self._tail - inc`, which is the last in-range index for both iteration directions. Add tests using a predicate which dereferences its argument and matches every element, forward and reversed. AI-assisted
* feat(lua): Iter:count() #40831PinkLea2026-07-20
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* fix(vim.iter): add richer generic annotationsLewis Russell2026-05-06
| | | | | | | | | | | | Improve the vim.iter annotations with richer generics that track element and tuple types through iterator pipelines, including multi-value stages and list-specific methods. Extend the LuaCATS parser and vimdoc generator so those richer generic classes and overloads round-trip into the generated help. These annotations are only supported by EmmyLua, so LuaLS still uses a broader fallback in _meta.lua. AI-assisted: Codex
* docs: api, messages, lsp, trustJustin M. Keyes2026-03-11
| | | | | gen_vimdoc.lua: In prepare for the upcoming release, comment-out the "Experimental" warning for prerelease features.
* feat(iter): peek(), skip(predicate) for non-list iterators #37604Elijah Koulaxis2026-02-12
| | | | | | | | | | | | Problem: Iter:peek() only works if the iterator is a |list-iterator| (internally, an `ArrayIter`). However, it is possible to implement :peek() support for any iterator. Solution: - add `_peeked` buffer for lookahead without actually consuming values - `peek()` now works for function, pairs(), and array iterators - `skip(predicate)` stops at the first non matching element without consuming it - keep existing optimized behavior for `ArrayIter` to maintain backward compatibility - use `pack`/`unpack` to support iterators that return multiple values
* feat(lua): add `Iter:unique()` (#37592)Olivia Kinnear2026-02-10
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* fix(iter): ArrayIter:last returns nil when filtered to empty #34697glepnir2025-07-22
| | | | | | Problem: After filtering out all elements, ArrayIter:last still returns a stale element. Solution: Add check for self._head == self._tail and return nil early. Fix #34696
* feat(runtime): accept predicates in take and skip (#34657)Mart-Mihkel Aun2025-07-03
| | | | | | Make `vim.iter():take()` and `vim.iter():skip()` optionally accept predicates to enable takewhile and skipwhile patterns used in functional programming.
* docs: miscdundargoc2025-03-15
| | | | | | | | | | | | | Co-authored-by: Au. <acehinnnqru@gmail.com> Co-authored-by: Daniel Rainer <daniel.rainer@localhost> Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com> Co-authored-by: Lewis Russell <lewis6991@gmail.com> Co-authored-by: Luuk van Baal <luukvbaal@gmail.com> Co-authored-by: Pierre Barbin <pierre@heitzsystem.com> Co-authored-by: Riley Bruins <ribru17@hotmail.com> Co-authored-by: Yinzuo Jiang <jiangyinzuo@foxmail.com> Co-authored-by: phanium <91544758+phanen@users.noreply.github.com> Co-authored-by: zeertzjq <zeertzjq@outlook.com>
* docs: misc #28970Justin M. Keyes2024-09-01
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* fix(types): use vararg return type annotationWill Hopkins2024-06-11
| | | | build(types): allow vararg returns in function types
* fix(vim.iter): enable optimizations for arrays (lists with holes) (#28781)Gregory Anders2024-05-17
| | | | | | | | The optimizations that vim.iter uses for array-like tables don't require that the source table has no holes. The only thing that needs to change is the determination if a table is "list-like": rather than requiring consecutive, integer keys, we can simply test for (positive) integer keys only, and remove any holes in the original array when we make a copy for the iterator.
* docs: misc (#28609)dundargoc2024-05-15
| | | | | | | | | | | | Closes https://github.com/neovim/neovim/issues/28484. Closes https://github.com/neovim/neovim/issues/28719. Co-authored-by: Chris <crwebb85@gmail.com> Co-authored-by: Gregory Anders <greg@gpanders.com> Co-authored-by: Jake B <16889000+jakethedev@users.noreply.github.com> Co-authored-by: Jonathan Raines <jonathan.s.raines@gmail.com> Co-authored-by: Yi Ming <ofseed@foxmail.com> Co-authored-by: Zane Dufour <zane@znd4.me> Co-authored-by: zeertzjq <zeertzjq@outlook.com>
* refactor(lua): remove deprecated features #28725Justin M. Keyes2024-05-13
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* docs: misc #24163Justin M. Keyes2024-04-30
| | | | | | | | | | - Also delete old perl scripts which are not used since 8+ years ago. fix #23251 fix #27367 ref https://github.com/neovim/neovim/issues/2252#issuecomment-1902662577 Helped-by: Daniel Kongsgaard <dakongsgaard@gmail.com> Co-authored-by: Kevin Pham <keevan.pham@gmail.com>
* refactor(vim.iter)!: rename xxback() => rxx() #28503Justin M. Keyes2024-04-26
| | | | | | | | | | | | | | | | Problem: vim.iter has both `rfind()` and various `*back()` methods, which work in "reverse" or "backwards" order. It's inconsistent to have both kinds of names, and "back" is fairly uncommon (rust) compared to python (rfind, rstrip, rsplit, …). Solution: - Remove `nthback()` and let `nth()` take a negative index. - Because `rnth()` looks pretty obscure, and because it's intuitive for a function named `nth()` to take negative indexes. - Rename `xxback()` methods to `rxx()`. - This informally groups the "list-iterator" functions under a common `r` prefix, which helps discoverability. - Rename `peekback()` to `pop()`, in duality with the existing `peek`.
* refactor(vim.iter)!: remove vim.iter.map/filter/totable #26138Justin M. Keyes2024-04-19
| | | | | | | | Problem: The use-case for the convenience functions vim.iter.map(), vim.iter.filter(), vim.iter.totable() is not clear. Solution: Drop them for now. We can revisit after 0.10 release.
* fix(vim.iter): use correct cmp function when truncating tail in `take` (#27998)Calvin Bochulak2024-03-23
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* docs: support inline markdownLewis Russell2024-03-09
| | | | | | - Tags are now created with `[tag]()` - References are now created with `[tag]` - Code spans are no longer wrapped
* fix(types): move type annotation for `IterMod`Will Hopkins2024-03-06
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* refactor(types): more fixes (2)Lewis Russell2024-03-06
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* docs: improve/add documentation of Lua typesLewis Russell2024-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Added `@inlinedoc` so single use Lua types can be inlined into the functions docs. E.g. ```lua --- @class myopts --- @inlinedoc --- --- Documentation for some field --- @field somefield integer --- @param opts myOpts function foo(opts) end ``` Will be rendered as ``` foo(opts) Parameters: - {opts} (table) Object with the fields: - somefield (integer) Documentation for some field ``` - Marked many classes with with `@nodoc` or `(private)`. We can eventually introduce these when we want to.
* feat(docs): replace lua2dox.luaLewis Russell2024-02-27
| | | | | | | | | | | | | | | | | | | | | | | | | | Problem: The documentation flow (`gen_vimdoc.py`) has several issues: - it's not very versatile - depends on doxygen - doesn't work well with Lua code as it requires an awkward filter script to convert it into pseudo-C. - The intermediate XML files and filters makes it too much like a rube goldberg machine. Solution: Re-implement the flow using Lua, LPEG and treesitter. - `gen_vimdoc.py` is now replaced with `gen_vimdoc.lua` and replicates a portion of the logic. - `lua2dox.lua` is gone! - No more XML files. - Doxygen is now longer used and instead we now use: - LPEG for comment parsing (see `scripts/luacats_grammar.lua` and `scripts/cdoc_grammar.lua`). - LPEG for C parsing (see `scripts/cdoc_parser.lua`) - Lua patterns for Lua parsing (see `scripts/luacats_parser.lua`). - Treesitter for Markdown parsing (see `scripts/text_utils.lua`). - The generated `runtime/doc/*.mpack` files have been removed. - `scripts/gen_eval_files.lua` now instead uses `scripts/cdoc_parser.lua` directly. - Text wrapping is implemented in `scripts/text_utils.lua` and appears to produce more consistent results (the main contributer to the diff of this change).
* docs(vim.iter): correct `bool` to `boolean` (#27018)notomo2024-01-18
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* fix(doc): improve doc generation of types using lpegLewis Russell2024-01-11
| | | | Added a lpeg grammar for LuaCATS and use it in lua2dox.lua
* feat(vim.iter): add Iter:flatten (#26786)JD2024-01-10
| | | | | Co-authored-by: Gregory Anders <greg@gpanders.com> Co-authored-by: Jongwook Choi <wookayin@gmail.com>
* refactor: fix luals warningsdundargoc2023-12-30
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* feat(iter): add `Iter.take` (#26525)Will Hopkins2023-12-12
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* feat(lua): implement Iter:join() (#26416)Gregory Anders2023-12-05
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* docs: vim.iter #26169Justin M. Keyes2023-11-25
| | | | closes #24141 closes #24746
* feat(vimdoc): support Markdown code blocks (#25127)Gregory Anders2023-09-13
| | | | | | Support Markdown code blocks in addition to <pre> blocks in Doxygen doc comments. Update doc comments in iter.lua as a test.
* fix(iter): make pipeline termination conditions consistent (#24614)Gregory Anders2023-08-09
| | | | | | | | If an iterator pipeline stage returns nil as its first return value, the other return values are ignored and it is treated as if that stage returned only nil (the semantics of returning nil are different between different stages). This is consistent with how for loops work in Lua more generally, where the for loop breaks when the first return value from the function iterator is nil (see :h for-in for details).
* docs: miscJustin M. Keyes2023-08-03
| | | | Co-authored-by: Kevin Pham <keevan.pham@gmail.com>
* docs(lua): more improvements (#24387)Lewis Russell2023-07-18
| | | | | | | | | | | | | | | | | * docs(lua): teach lua2dox how to table * docs(lua): teach gen_vimdoc.py about local functions No more need to mark local functions with @private * docs(lua): mention @nodoc and @meta in dev-lua-doc * fixup! Co-authored-by: Justin M. Keyes <justinkz@gmail.com> --------- Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
* docs(lua): change *lua-foo* -> *vim.foo*Lewis Russell2023-07-17
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* fix(docs): vimdoc syntax errorsJustin M. Keyes2023-06-25
| | | | gen_help_html: truncate parse-error sample text
* docs #22363Justin M. Keyes2023-06-19
| | | | | | | | | Co-authored by: zeertzjq <zeertzjq@outlook.com> Co-authored by: Steven Todd McIntyre II <114119064+stmii@users.noreply.github.com> Co-authored by: nobe4 <nobe4@users.noreply.github.com> - docs: mention --luadev-mod to run with lua runtime files When changing a lua file in the ./runtime folder, a new contributor might expect changes to be applied to the built Neovim binary.
* feat(lua): use callable table as iterator in vim.iter (#23957)Mathias Fußenegger2023-06-10
| | | | A table passed to `vim.iter` can be a class instance with a `__call` implementation for the iterator protocol.
* perf(iter): make ListIter.totable more efficient (#23714)Lewis Russell2023-06-03
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* docs(iter): add emmylua type to iter module (#23845)Sebastian Lyng Johansen2023-06-03
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* docs: small fixes (#23619)dundargoc2023-06-02
| | | | | | Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com> Co-authored-by: Gustavo Ferreira <gustavo.ferreira@imaginecurve.com> Co-authored-by: Kai Moschcau <mail@kmoschcau.de> Co-authored-by: Lampros <hauahx@gmail.com>
* perf(iter): reduce number of table allocationsGregory Anders2023-04-28
| | | | | | | | Packing and unpacking return values impairs performance considerably. In an attempt to avoid creating tables as much as possible we can instead pass return values between functions (which does not require knowing the number of values a function might return). This makes the code more complex, but improves benchmark numbers non-trivially.
* refactor(iter): move helper functions under vim.iterGregory Anders2023-04-25
| | | | vim.iter is now both a function and a module (similar to vim.version).
* refactor(iter): use metatable as packed table tag (#23254)Gregory Anders2023-04-21
| | | | | This is a more robust method for tagging a packed table as it completely eliminates the possibility of mistaking an actual table key as the packed table tag.