Zig API Reference

Zig API Reference v1.9.0-rc.27¶

Functions¶

detectLanguageFromExtension()¶

Detect language name from a file extension (without leading dot).

Returns null for unrecognized extensions. The match is case-insensitive.

Signature:

pub fn detect_language_from_extension(ext: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`ext`	`[:0]const u8`	Yes	The ext

Returns: ?[:0]const u8

detectLanguageFromPath()¶

Detect language name from a file path.

Extracts the file extension and looks it up. Returns null if the path has no extension or the extension is not recognized.

Signature:

pub fn detect_language_from_path(path: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`path`	`[:0]const u8`	Yes	Path to the file

Returns: ?[:0]const u8

detectLanguageFromContent()¶

Detect language name from file content using the shebang line (#!).

Inspects only the first line of content. If it begins with #!, the interpreter name is extracted and mapped to a language name.

Handles common patterns:

#!/usr/bin/env python3 → "python"
#!/bin/bash → "bash"
#!/usr/bin/env node → "javascript"

The -S flag accepted by some env implementations is skipped automatically. Version suffixes (e.g. python3.11, ruby3.2) are stripped before matching.

Returns null when content does not start with #!, the shebang is malformed, or the interpreter is not recognised.

Signature:

pub fn detect_language_from_content(content: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`content`	`[:0]const u8`	Yes	The content to process

Returns: ?[:0]const u8

getHighlightsQuery()¶

Get the highlights query for a language, if bundled.

Returns the contents of highlights.scm as a static string, or null if no highlights query is bundled for this language.

Signature:

pub fn get_highlights_query(language: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`language`	`[:0]const u8`	Yes	The language

Returns: ?[:0]const u8

getInjectionsQuery()¶

Get the injections query for a language, if bundled.

Returns the contents of injections.scm as a static string, or null if no injections query is bundled for this language.

Signature:

pub fn get_injections_query(language: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`language`	`[:0]const u8`	Yes	The language

Returns: ?[:0]const u8

getLocalsQuery()¶

Get the locals query for a language, if bundled.

Returns the contents of locals.scm as a static string, or null if no locals query is bundled for this language.

Signature:

pub fn get_locals_query(language: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`language`	`[:0]const u8`	Yes	The language

Returns: ?[:0]const u8

getTagsQuery()¶

Get the tags query for a language, if bundled.

Returns the contents of tags.scm as a static string, or null if no tags query is bundled for this language.

Signature:

pub fn get_tags_query(language: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`language`	`[:0]const u8`	Yes	The language

Returns: ?[:0]const u8

getLanguage()¶

Get a tree-sitter Language by name using the global registry.

Resolves language aliases (e.g., "shell" maps to "bash"). When the download feature is enabled (default), automatically downloads the parser from GitHub releases if not found locally.

Errors:

Returns Error.LanguageNotFound if the language is not recognized, or Error.Download if auto-download fails.

Signature:

pub fn get_language(name: [:0]const u8) Error!Language

Parameters:

Name	Type	Required	Description
`name`	`[:0]const u8`	Yes	The name

Returns: Language Errors: Throws Error.

getParser()¶

Get a Parser pre-configured for the given language.

This is a convenience function that calls get_language and configures a new parser in one step.

Errors:

Returns Error.LanguageNotFound if the language is not recognized, or Error.ParserSetup if the language cannot be applied to the parser.

Signature:

pub fn get_parser(name: [:0]const u8) Error!Parser

Parameters:

Name	Type	Required	Description
`name`	`[:0]const u8`	Yes	The name

Returns: Parser Errors: Throws Error.

detectLanguage()¶

Detect language name from a file path or extension.

This compatibility alias matches the pre-Alef Python binding API.

Signature:

pub fn detect_language(path: [:0]const u8) ?[:0]const u8

Parameters:

Name	Type	Required	Description
`path`	`[:0]const u8`	Yes	Path to the file

Returns: ?[:0]const u8

availableLanguages()¶

List all available language names (sorted, deduplicated, includes aliases).

Returns names of both statically compiled and dynamically loadable languages, plus any configured aliases.

Signature:

pub fn available_languages() []const [:0]const u8

Returns: []const [:0]const u8

hasLanguage()¶

Check if a language is available by name or alias.

Returns true if the language can be loaded (statically compiled, dynamically available, or a known alias for one of these).

Signature:

pub fn has_language(name: [:0]const u8) bool

Parameters:

Name	Type	Required	Description
`name`	`[:0]const u8`	Yes	The name

Returns: bool

languageCount()¶

Return the number of available languages.

Includes statically compiled languages, dynamically loadable languages, and aliases.

Signature:

pub fn language_count() u64

Returns: u64

process()¶

Process source code and extract file intelligence using the global registry.

Parses the source with tree-sitter and extracts metrics, structure, imports, exports, comments, docstrings, symbols, diagnostics, and/or chunks based on the flags set in ProcessConfig.

Errors:

Returns an error if the language is not found or parsing fails.

Signature:

pub fn process(source: [:0]const u8, config: ProcessConfig) Error!ProcessResult

Parameters:

Name	Type	Required	Description
`source`	`[:0]const u8`	Yes	The source
`config`	`ProcessConfig`	Yes	The configuration options

Returns: ProcessResult Errors: Throws Error.

init()¶

Initialize the language pack with the given configuration.

Applies any custom cache directory, then downloads all languages and groups specified in the config. This is the recommended entry point when you want to pre-warm the cache before use.

Errors:

Returns an error if configuration cannot be applied or if downloads fail.

Signature:

pub fn init(config: PackConfig) Error!void

Parameters:

Name	Type	Required	Description
`config`	`PackConfig`	Yes	The configuration options

Returns: void Errors: Throws Error.

configure()¶

Apply download configuration without downloading anything.

Use this to set a custom cache directory before the first call to get_language or any download function. Changing the cache dir after languages have been registered has no effect on already-loaded languages.

Errors:

Returns an error if the lock cannot be acquired.

Signature:

pub fn configure(config: PackConfig) Error!void

Parameters:

Name	Type	Required	Description
`config`	`PackConfig`	Yes	The configuration options

Returns: void Errors: Throws Error.

download()¶

Download specific languages to the local cache.

Returns the number of requested languages available after the call. Already compiled or cached languages are included in the count.

Errors:

Returns an error if any language is not available in the manifest or if the download fails.

Signature:

pub fn download(names: []const [:0]const u8) Error!u64

Parameters:

Name	Type	Required	Description
`names`	`[]const [:0]const u8`	Yes	The names

Returns: u64 Errors: Throws Error.

downloadAll()¶

Download all available languages from the remote manifest.

Downloads the platform bundle and extracts every library it contains. Languages that appear in the manifest but are absent from the bundle (e.g. grammars that failed to compile at release time) are silently skipped — they are not treated as an error.

Returns the total number of languages now available (statically compiled plus downloaded and cached).

Errors:

Returns an error if the manifest cannot be fetched or the bundle download fails.

Signature:

pub fn download_all() Error!u64

Returns: u64 Errors: Throws Error.

downloadGroup()¶

Download every language in a named group (e.g. "web", "data").

Groups are defined in the remote manifest and let you ensure a curated set of related grammars in one call instead of listing each name to download(). Already-cached languages are skipped.

Returns the total number of languages now available (statically compiled plus downloaded and cached).

Errors:

Returns an error if the manifest cannot be fetched, the group is unknown, or any constituent language fails to download.

Signature:

pub fn download_group(name: [:0]const u8) Error!u64

Parameters:

Name	Type	Required	Description
`name`	`[:0]const u8`	Yes	The name

Returns: u64 Errors: Throws Error.

manifestLanguages()¶

Return all language names available in the remote manifest (306).

Fetches (and caches) the remote manifest to discover the full list of downloadable languages. Use downloaded_languages to list what is already cached locally.

Errors:

Returns an error if the manifest cannot be fetched.

Signature:

pub fn manifest_languages() Error![]const [:0]const u8

Returns: []const [:0]const u8 Errors: Throws Error.

downloadedLanguages()¶

Return languages that are already downloaded and cached locally.

Does not perform any network requests. Returns an empty list if the cache directory does not exist or cannot be read.

Signature:

pub fn downloaded_languages() []const [:0]const u8

Returns: []const [:0]const u8

cleanCache()¶

Delete all cached parser shared libraries.

Resets the cache registration so the next call to get_language or a download function will re-register the (now empty) cache directory.

Errors:

Returns an error if the cache directory cannot be removed.

Signature:

pub fn clean_cache() Error!void

Returns: void Errors: Throws Error.

cacheDir()¶

Return the effective cache directory path.

This is either the custom path set via configure / init or the default: ~/.cache/tree-sitter-language-pack/v{version}/libs/.

Errors:

Returns an error if the system cache directory cannot be determined.

Signature:

pub fn cache_dir() Error![:0]const u8

Returns: [:0]const u8 Errors: Throws Error.

Types¶

ByteRange¶

A byte range — start (inclusive) to end (exclusive).

Field	Type	Default	Description
`start`	`u64`	—	Inclusive start byte offset.
`end`	`u64`	—	Exclusive end byte offset.

ChunkContext¶

Metadata for a single chunk of source code.

Field	Type	Default	Description
`language`	`[:0]const u8`	—	Language name used to parse this chunk.
`chunkIndex`	`u64`	—	Zero-indexed position of this chunk within the file's chunk list.
`totalChunks`	`u64`	—	Total number of chunks the file was split into.
`nodeTypes`	`[]const [:0]const u8`	`[]`	Tree-sitter node kinds that appear at the top level of this chunk.
`contextPath`	`[]const [:0]const u8`	`[]`	Hierarchical path of enclosing structural items (e.g., `["MyClass", "my_method"]`).
`symbolsDefined`	`[]const [:0]const u8`	`[]`	Names of symbols defined within this chunk.
`comments`	`[]const CommentInfo`	`[]`	Comments contained within this chunk.
`docstrings`	`[]const DocstringInfo`	`[]`	Docstrings contained within this chunk.
`hasErrorNodes`	`bool`	—	Whether this chunk contains any tree-sitter error nodes.

CodeChunk¶

A chunk of source code with rich metadata.

Field	Type	Default	Description
`content`	`[:0]const u8`	—	The raw source text of this chunk.
`startByte`	`u64`	—	Inclusive start byte offset of this chunk in the original source.
`endByte`	`u64`	—	Exclusive end byte offset of this chunk in the original source.
`startLine`	`u64`	—	Zero-indexed start line of this chunk.
`endLine`	`u64`	—	Zero-indexed end line of this chunk.
`metadata`	`ChunkContext`	—	Contextual metadata about this chunk.

CommentInfo¶

A comment extracted from source code.

Field	Type	Default	Description
`text`	`[:0]const u8`	—	The raw text content of the comment.
`kind`	`CommentKind`	`CommentKind.Line`	The kind of comment (line, block, or doc).
`span`	`Span`	—	Source span covering the comment.
`associatedNode`	`[:0]const u8?`	`null`	Name of the syntax node this comment is directly associated with.

Diagnostic¶

A diagnostic (syntax error, missing node, etc.) from parsing.

Field	Type	Default	Description
`message`	`[:0]const u8`	—	Human-readable description of the diagnostic.
`severity`	`DiagnosticSeverity`	`DiagnosticSeverity.Error`	Severity of the diagnostic.
`span`	`Span`	—	Source span where the diagnostic was detected.

DocSection¶

A section within a docstring (e.g., Args, Returns, Raises).

Field	Type	Default	Description
`kind`	`[:0]const u8`	—	Section kind (e.g., `"args"`, `"returns"`, `"raises"`).
`name`	`[:0]const u8?`	`null`	Parameter or return value name, if applicable.
`description`	`[:0]const u8`	—	Description text for this section.

DocstringInfo¶

A docstring extracted from source code.

Field	Type	Default	Description
`text`	`[:0]const u8`	—	The raw text of the docstring.
`format`	`DocstringFormat`	`DocstringFormat.PythonTripleQuote`	The docstring format (Python, JSDoc, Rustdoc, etc.).
`span`	`Span`	—	Source span covering the docstring.
`associatedItem`	`[:0]const u8?`	`null`	Name of the item this docstring documents.
`parsedSections`	`[]const DocSection`	`[]`	Parsed sections of the docstring (Args, Returns, Raises, etc.).

DownloadManager¶

Manages downloading and caching of pre-built parser shared libraries.

Methods¶

new()¶

Create a new download manager for the given version.

Signature:

pub fn new(version: [:0]const u8) Error!DownloadManager

installedLanguages()¶

List languages that are already downloaded and cached.

Signature:

pub fn installedLanguages(self: *const DownloadManager) []const [:0]const u8

downloadAllBestEffort()¶

Download the platform bundle and extract every library file it contains.

Unlike Self.ensure_languages, this does not check the manifest language list against archive contents — it simply extracts all .so/.dylib/.dll files from the bundle. Languages in the manifest that are missing from the archive are silently ignored rather than returning an error.

Returns the number of library files extracted (including those already cached).

Signature:

pub fn downloadAllBestEffort(self: *const DownloadManager) Error!u64

cleanCache()¶

Remove all cached parser libraries.

Acquires the cross-process lock so clean_cache cannot race a concurrent downloader (avoids Windows sharing-violation errors against an in-flight bundle write). The .download.lock file itself is not removed — it is permanent infrastructure; deleting it could allow a concurrent process that already opened the file to continue holding a stale lock handle while a new process opens a fresh inode, breaking the mutual-exclusion guarantee.

Signature:

pub fn cleanCache(self: *const DownloadManager) Error!void

ExportInfo¶

An export statement extracted from source code.

Field	Type	Default	Description
`name`	`[:0]const u8`	—	The exported name.
`kind`	`ExportKind`	`ExportKind.Named`	The kind of export (named, default, or re-export).
`span`	`Span`	—	Source span covering the export statement.

FileMetrics¶

Aggregate metrics for a source file.

Field	Type	Default	Description
`totalLines`	`u64`	—	Total number of lines (including blank and comment lines).
`codeLines`	`u64`	—	Number of lines containing non-blank, non-comment source code.
`commentLines`	`u64`	—	Number of lines that are entirely comments.
`blankLines`	`u64`	—	Number of blank (whitespace-only) lines.
`totalBytes`	`u64`	—	Total byte length of the source file.
`nodeCount`	`u64`	—	Total number of nodes in the syntax tree.
`errorCount`	`u64`	—	Number of error nodes in the syntax tree (parse errors).
`maxDepth`	`u64`	—	Maximum nesting depth reached in the syntax tree.

ImportInfo¶

An import statement extracted from source code.

Field	Type	Default	Description
`source`	`[:0]const u8`	—	The module or path being imported from.
`items`	`[]const [:0]const u8`	`[]`	Specific names imported from the source module.
`alias`	`[:0]const u8?`	`null`	Alias assigned to the import (e.g., `import numpy as np`).
`isWildcard`	`bool`	—	Whether this is a wildcard import (e.g., `import ` or `use foo.`).
`span`	`Span`	—	Source span covering the import statement.

Language¶

LanguageRegistry¶

Thread-safe registry of tree-sitter language parsers.

Manages both statically compiled and dynamically loaded language grammars. Use LanguageRegistry.new() for the default registry, or access the global instance via the module-level convenience functions (get_language, available_languages, etc.).

Methods¶

new()¶

Create a new registry populated with all statically compiled languages.

When the dynamic-loading feature is enabled, the registry also knows about dynamically loadable grammars and will load them on demand.

Signature:

pub fn new() LanguageRegistry

getLanguage()¶

Get a tree-sitter Language by name.

Resolves aliases (e.g., "shell" -> "bash", "makefile" -> "make"), then looks up the language in the static table. When the dynamic-loading feature is enabled, falls back to loading a shared library on demand.

Errors:

Returns Error.LanguageNotFound if the name (after alias resolution) does not match any known grammar.

Signature:

pub fn getLanguage(self: *const LanguageRegistry, name: [:0]const u8) Error!Language

availableLanguages()¶

List all available language names, sorted and deduplicated.

Includes statically compiled languages, dynamically loadable languages (if the dynamic-loading feature is enabled), and all configured aliases.

Signature:

pub fn availableLanguages(self: *const LanguageRegistry) []const [:0]const u8

hasParser()¶

Check whether a parser is statically compiled into this build.

Returns true only when the grammar was compiled in at build time (i.e. it appears in the STATIC_LANGUAGES table). This is independent of the extension-to-language mapping: detect_language_from_extension consults the static ext table for all 306 grammars regardless of which parsers are compiled in.

Use this when you need to distinguish "we know the language name" from "we can actually parse files in that language right now".

use tree_sitter_language_pack::{detect_language_from_extension, LanguageRegistry};

let registry = LanguageRegistry::new();
// Extension detection uses the static table — independent of compiled parsers.
let lang = detect_language_from_extension("feature"); // always returns Some("gherkin")
// Parser availability depends on which grammars were compiled in.
let can_parse = lang.map(|name| registry.has_parser(name)).unwrap_or(false);

Signature:

pub fn hasParser(self: *const LanguageRegistry, name: [:0]const u8) bool

hasLanguage()¶

Check whether a language is available by name or alias.

Returns true if the language can be loaded, either from the static table or from a dynamic library on disk.

Signature:

pub fn hasLanguage(self: *const LanguageRegistry, name: [:0]const u8) bool

languageCount()¶

Return the total number of available languages (including aliases).

Signature:

pub fn languageCount(self: *const LanguageRegistry) u64

process()¶

Parse source code and extract file intelligence based on config in a single pass.

Signature:

pub fn process(self: *const LanguageRegistry, source: [:0]const u8, config: ProcessConfig) Error!ProcessResult

default()¶

Signature:

pub fn default() LanguageRegistry

Node¶

A single syntax node within a Tree.

Nodes hold a strong reference to their parent tree so they remain valid regardless of how the tree is moved or stored at the FFI boundary.

Methods¶

clone()¶

Signature:

pub fn clone(self: *const Node) Node

kind()¶

Return the node's kind name (e.g. "function_definition").

Signature:

pub fn kind(self: *const Node) [:0]const u8

kindId()¶

Return the node's numeric kind ID.

Tree-sitter assigns a stable u16 ID to every node kind in a grammar (e.g. "function_definition" → 42). Comparing kind_id() is cheaper than comparing the string kind() in tight AST loops.

Signature:

pub fn kindId(self: *const Node) u16

startByte()¶

Return the inclusive start byte offset of this node.

Signature:

pub fn startByte(self: *const Node) u64

endByte()¶

Return the exclusive end byte offset of this node.

Signature:

pub fn endByte(self: *const Node) u64

byteRange()¶

Return the node's byte range as a ByteRange.

Callers should slice their own source bytes — this is a zero-copy text accessor.

Signature:

pub fn byteRange(self: *const Node) ByteRange

startPosition()¶

Return the start Point (row, column).

Signature:

pub fn startPosition(self: *const Node) Point

endPosition()¶

Return the end Point (row, column).

Signature:

pub fn endPosition(self: *const Node) Point

isNamed()¶

True when this node is named (not punctuation/whitespace).

Signature:

pub fn isNamed(self: *const Node) bool

isError()¶

True when this is an error node.

Signature:

pub fn isError(self: *const Node) bool

isMissing()¶

True when this is a missing-token node.

Signature:

pub fn isMissing(self: *const Node) bool

isExtra()¶

True when this is an "extra" node (e.g. a comment).

Signature:

pub fn isExtra(self: *const Node) bool

hasError()¶

True when this node or any descendant is an error.

Signature:

pub fn hasError(self: *const Node) bool

parent()¶

Return this node's parent, if any.

Signature:

pub fn parent(self: *const Node) ?Node

child()¶

Return the i-th child of this node, if any.

Signature:

pub fn child(self: *const Node, index: u32) ?Node

childCount()¶

Total number of children (including unnamed).

Signature:

pub fn childCount(self: *const Node) u64

namedChild()¶

Return the i-th named child of this node, if any.

Signature:

pub fn namedChild(self: *const Node, index: u32) ?Node

namedChildCount()¶

Number of named children of this node.

Signature:

pub fn namedChildCount(self: *const Node) u64

childByFieldName()¶

Look up a child by its grammar-defined field name.

Signature:

pub fn childByFieldName(self: *const Node, name: [:0]const u8) ?Node

toSexp()¶

Return the S-expression form of this node's subtree.

Signature:

pub fn toSexp(self: *const Node) [:0]const u8

walk()¶

Return a TreeCursor positioned at this node.

Signature:

pub fn walk(self: *const Node) TreeCursor

PackConfig¶

Configuration for the tree-sitter language pack.

Controls cache directory and which languages to pre-download. Can be loaded from a TOML file, constructed programmatically, or passed as a dict/object from language bindings.

Field	Type	Default	Description
`cacheDir`	`[:0]const u8?`	`null`	Override default cache directory. Default: `~/.cache/tree-sitter-language-pack/v{version}/libs/`
`languages`	`[]const [:0]const u8?`	`[]`	Languages to pre-download on init. Each entry is a language name (e.g. `"python"`, `"rust"`).
`groups`	`[]const [:0]const u8?`	`[]`	Language groups to pre-download (e.g. `"web"`, `"systems"`, `"scripting"`).

Parser¶

A tree-sitter parser configured for one language at a time.

Methods¶

new()¶

Construct a new parser with no language set.

Call Parser.set_language before parsing.

Signature:

pub fn new() Parser

setLanguage()¶

Configure the parser to use the language identified by name (e.g. "python").

Resolves the language through the global registry — auto-downloading if necessary, when the download feature is enabled.

Errors:

Returns Error.LanguageNotFound if the language is not recognized, or Error.ParserSetup if the language ABI is incompatible.

Signature:

pub fn setLanguage(self: *const Parser, name: [:0]const u8) Error!void

parse()¶

Parse a UTF-8 source string. Returns null if parsing was cancelled or no language is set.

Signature:

pub fn parse(self: *const Parser, source: [:0]const u8) ?Tree

parseBytes()¶

Parse a raw byte slice. Returns null if parsing was cancelled or no language is set.

Signature:

pub fn parseBytes(self: *const Parser, source: []const u8) ?Tree

reset()¶

Reset internal state. The next call to parse will not be incremental.

Signature:

pub fn reset(self: *const Parser) void

default()¶

Signature:

pub fn default() Parser

Point¶

A source position — row + column, zero-indexed.

Field	Type	Default	Description
`row`	`u64`	—	Zero-indexed row number.
`column`	`u64`	—	Zero-indexed column number, in UTF-16 code units.

ProcessConfig¶

Configuration for the process() function.

Controls which analysis features are enabled and whether chunking is performed.

Field	Type	Default	Description
`language`	`[:0]const u8`	—	Language name (required).
`structure`	`bool`	`true`	Extract structural items (functions, classes, etc.). Default: true.
`imports`	`bool`	`true`	Extract import statements. Default: true.
`exports`	`bool`	`true`	Extract export statements. Default: true.
`comments`	`bool`	`false`	Extract comments. Default: false.
`docstrings`	`bool`	`false`	Extract docstrings. Default: false.
`symbols`	`bool`	`false`	Extract symbol definitions. Default: false.
`diagnostics`	`bool`	`false`	Include parse diagnostics. Default: false.
`chunkMaxSize`	`u64?`	`null`	Maximum chunk size in bytes. `null` disables chunking.

Methods¶

default()¶

Signature:

pub fn default() ProcessConfig

withChunking()¶

Enable chunking with the given maximum chunk size in bytes.

Signature:

pub fn withChunking(self: *const ProcessConfig, max_size: u64) ProcessConfig

all()¶

Enable all analysis features.

Signature:

pub fn all(self: *const ProcessConfig) ProcessConfig

minimal()¶

Disable all analysis features (only metrics computed).

Signature:

pub fn minimal(self: *const ProcessConfig) ProcessConfig

ProcessResult¶

Complete analysis result from processing a source file.

Contains metrics, structural analysis, imports/exports, comments, docstrings, symbols, diagnostics, and optionally chunked code segments. Fields are populated based on the ProcessConfig flags.

Field	Type	Default	Description
`language`	`[:0]const u8`	—	The language name used to parse the source file.
`metrics`	`FileMetrics`	—	File-level metrics (line counts, byte size, error count).
`structure`	`[]const StructureItem`	`[]`	Top-level structural items (functions, classes, etc.).
`imports`	`[]const ImportInfo`	`[]`	Import statements extracted from the source.
`exports`	`[]const ExportInfo`	`[]`	Export statements extracted from the source.
`comments`	`[]const CommentInfo`	`[]`	Comments extracted from the source.
`docstrings`	`[]const DocstringInfo`	`[]`	Docstrings extracted from the source.
`symbols`	`[]const SymbolInfo`	`[]`	Symbol definitions (variables, types, functions) extracted from the source.
`diagnostics`	`[]const Diagnostic`	`[]`	Parse diagnostics (syntax errors, missing nodes) from tree-sitter.
`chunks`	`[]const CodeChunk`	`[]`	Syntax-aware code chunks produced when chunking is enabled.

Span¶

Byte and line/column range in source code.

Represents both byte offsets (for slicing) and human-readable line/column positions (for display and diagnostics).

Field	Type	Default	Description
`startByte`	`u64`	—	Inclusive start byte offset in the source.
`endByte`	`u64`	—	Exclusive end byte offset in the source.
`startLine`	`u64`	—	Zero-indexed line number of the span's start.
`startColumn`	`u64`	—	Zero-indexed column number of the span's start.
`endLine`	`u64`	—	Zero-indexed line number of the span's end.
`endColumn`	`u64`	—	Zero-indexed column number of the span's end.

StructureItem¶

A structural item (function, class, struct, etc.) in source code.

Field	Type	Default	Description
`kind`	`StructureKind`	`StructureKind.Function`	The kind of structural item.
`name`	`[:0]const u8?`	`null`	The declared name of the item, if present.
`visibility`	`[:0]const u8?`	`null`	Visibility modifier (e.g., `"pub"`, `"public"`, `"private"`).
`span`	`Span`	—	Source span covering the entire item declaration.
`children`	`[]const StructureItem`	`[]`	Nested structural items (e.g., methods within a class).
`decorators`	`[]const [:0]const u8`	`[]`	Decorator or attribute names applied to the item.
`docComment`	`[:0]const u8?`	`null`	Documentation comment attached to the item, if any.
`signature`	`[:0]const u8?`	`null`	Full signature text of the item (e.g., function parameters and return type).
`bodySpan`	`Span?`	`null`	Source span covering only the body of the item, if distinct from the declaration.

SymbolInfo¶

A symbol (variable, function, type, etc.) extracted from source code.

Field	Type	Default	Description
`name`	`[:0]const u8`	—	The name of the symbol.
`kind`	`SymbolKind`	`SymbolKind.Variable`	The kind of symbol (variable, function, class, etc.).
`span`	`Span`	—	Source span covering the symbol definition.
`typeAnnotation`	`[:0]const u8?`	`null`	Explicit type annotation, if present in the source.
`doc`	`[:0]const u8?`	`null`	Documentation comment associated with this symbol.

Tree¶

A parsed syntax tree. Cheap to clone (refcount bump).

Methods¶

rootNode()¶

Return the root Node of this tree.

Signature:

pub fn rootNode(self: *const Tree) Node

walk()¶

Return a TreeCursor positioned at the root.

Signature:

pub fn walk(self: *const Tree) TreeCursor

TreeCursor¶

A cursor for traversing a Tree.

Methods¶

node()¶

Return the Node at the cursor's current position.

Signature:

pub fn node(self: *const TreeCursor) Node

gotoFirstChild()¶

Move the cursor to the first child of the current node. Returns true if a child existed.

Signature:

pub fn gotoFirstChild(self: *const TreeCursor) bool

gotoParent()¶

Move the cursor to the parent of the current node. Returns true if a parent existed.

Signature:

pub fn gotoParent(self: *const TreeCursor) bool

gotoNextSibling()¶

Move the cursor to the next sibling of the current node. Returns true if a sibling existed.

Signature:

pub fn gotoNextSibling(self: *const TreeCursor) bool

fieldName()¶

Return the field name for the current node, if any.

Signature:

pub fn fieldName(self: *const TreeCursor) ?[:0]const u8

Enums¶

StructureKind¶

The kind of structural item found in source code.

Categorizes top-level and nested declarations such as functions, classes, structs, enums, traits, and more. Use Other for language-specific constructs that do not fit a standard category.

Value	Description
`Function`	A free-standing or associated function.
`Method`	A method defined inside a class, struct, trait, or impl block.
`Class`	A class definition.
`Struct`	A struct definition.
`Interface`	An interface or protocol definition.
`Enum`	An enum definition.
`Module`	A module or package declaration.
`Trait`	A trait definition.
`Impl`	An impl block (Rust) or similar implementation block.
`Namespace`	A namespace declaration.
`Other`	A language-specific construct that does not fit any standard category. — Fields: `0`: `[:0]const u8`

CommentKind¶

The kind of a comment found in source code.

Distinguishes between single-line comments, block (multi-line) comments, and documentation comments.

Value	Description
`Line`	A single-line comment (e.g., `// ...` or `# ...`).
`Block`	A block or multi-line comment (e.g., `/* ... */`).
`Doc`	A documentation comment (e.g., `/// ...` or `/** ... */`).

DocstringFormat¶

The format of a docstring extracted from source code.

Identifies the docstring convention used, which varies by language (e.g., Python triple-quoted strings, JSDoc, Rustdoc /// comments).

Value	Description
`PythonTripleQuote`	Python triple-quoted string docstring (`"""..."""`).
`JsDoc`	JavaScript/TypeScript JSDoc comment (`/** ... */`).
`Rustdoc`	Rust `///` or `//!` doc comment.
`GoDoc`	Go doc comment (a comment block immediately preceding a declaration).
`JavaDoc`	Java Javadoc comment (`/** ... */`).
`Other`	A language-specific docstring format not covered by the standard variants. — Fields: `0`: `[:0]const u8`

ExportKind¶

The kind of an export statement found in source code.

Covers named exports, default exports, and re-exports from other modules.

Value	Description
`Named`	A named export (e.g., `export { foo }`).
`Default`	A default export (e.g., `export default foo`).
`ReExport`	A re-export from another module (e.g., `export { foo } from 'bar'`).

SymbolKind¶

The kind of a symbol definition found in source code.

Categorizes symbol definitions such as variables, constants, functions, classes, types, interfaces, enums, and modules.

Value	Description
`Variable`	A variable binding.
`Constant`	A constant (immutable binding).
`Function`	A function definition.
`Class`	A class definition.
`Type`	A type alias or typedef.
`Interface`	An interface definition.
`Enum`	An enum definition.
`Module`	A module declaration.
`Other`	A symbol kind not covered by the standard variants. — Fields: `0`: `[:0]const u8`

DiagnosticSeverity¶

Severity level of a diagnostic produced during parsing.

Used to classify parse errors, warnings, and informational messages found in the syntax tree.

Value	Description
`Error`	A parse error (e.g., an `ERROR` or `MISSING` node in the tree).
`Warning`	A warning-level diagnostic.
`Info`	An informational diagnostic.

Errors¶

Error¶

Errors that can occur when using the tree-sitter language pack.

Covers language lookup failures, parse errors, query errors, and I/O issues. Feature-gated variants are included when config, download, or related features are enabled.

Variant	Description
`LanguageNotFound`	The requested language name (or alias) was not found in the registry.
`DynamicLoad`	A dynamic shared library could not be loaded at runtime.
`NullLanguagePointer`	The tree-sitter language function returned a null pointer for the given language name.
`ParserSetup`	The language could not be applied to the parser (e.g., ABI version mismatch).
`LockPoisoned`	An internal `RwLock` or `Mutex` was poisoned by a previous panic.
`Config`	A configuration file or value was invalid or could not be applied.
`ParseFailed`	The tree-sitter parser returned no tree for the given source input.
`QueryError`	A tree-sitter query could not be compiled or executed.
`InvalidRange`	A byte range was invalid (e.g., end before start, or out of bounds).
`Download`	A parser download from GitHub releases failed.
`ChecksumMismatch`	The downloaded file's SHA-256 digest did not match the manifest's expected value.
`CacheLock`	The cross-process download cache lock file could not be acquired or created.

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