Treesitter

Nvim :help pages, generated from source using the tree-sitter-vimdoc parser.

Treesitter integration
Nvim integrates the tree-sitter library for incremental parsing of buffers: https://tree-sitter.github.io/tree-sitter/
WARNING: Treesitter support is still experimental and subject to frequent changes. This documentation may also not fully reflect the latest changes.

PARSER FILES treesitter-parsers

Parsers are the heart of tree-sitter. They are libraries that tree-sitter will search for in the parser runtime directory. By default, Nvim bundles only parsers for C, Lua, and Vimscript, but parsers can be installed manually or via a plugin like https://github.com/nvim-treesitter/nvim-treesitter. Parsers are searched for as parser/{lang}.* in any 'runtimepath' directory. If multiple parsers for the same language are found, the first one is used. (This typically implies the priority "user config > plugins > bundled". A parser can also be loaded manually using a full path:
vim.treesitter.require_language("python", "/path/to/python.so")

LANGUAGE TREES treesitter-languagetree

LanguageTree
As buffers can contain multiple languages (e.g., Vimscript commands in a Lua file), multiple parsers may be needed to parse the full buffer. These are combined in a LanguageTree object.
To create a LanguageTree (parser object) for a buffer and a given language, use
tsparser = vim.treesitter.get_parser(bufnr, lang)
bufnr=0 can be used for current buffer. lang will default to 'filetype'. Currently, the parser will be retained for the lifetime of a buffer but this is subject to change. A plugin should keep a reference to the parser object as long as it wants incremental updates.
Whenever you need to access the current syntax tree, parse the buffer:
tstree = tsparser:parse()
This will return a table of immutable treesitter-trees that represent the current state of the buffer. When the plugin wants to access the state after a (possible) edit it should call parse() again. If the buffer wasn't edited, the same tree will be returned again without extra work. If the buffer was parsed before, incremental parsing will be done of the changed parts.
Note: To use the parser directly inside a nvim_buf_attach() Lua callback, you must call get_parser() before you register your callback. But preferably parsing shouldn't be done directly in the change callback anyway as they will be very frequent. Rather a plugin that does any kind of analysis on a tree should use a timer to throttle too frequent updates.
See lua-treesitter-languagetree for the list of available methods.

TREESITTER TREES treesitter-tree

tstree
A "treesitter tree" represents the parsed contents of a buffer, which can be used to perform further analysis. It is a luaref-userdata reference to an object held by the tree-sitter library.
An instance tstree of a treesitter tree supports the following methods.
tstree:root() tstree:root() Return the root node of this tree.
tstree:copy() tstree:copy() Returns a copy of the tstree.

TREESITTER NODES treesitter-node

tsnode
A "treesitter node" represents one specific element of the parsed contents of a buffer, which can be captured by aQuery for, e.g., highlighting. It is a luaref-userdata reference to an object held by the tree-sitter library.
An instance tsnode of a treesitter node supports the following methods.
tsnode:parent() tsnode:parent() Get the node's immediate parent.
tsnode:next_sibling() tsnode:next_sibling() Get the node's next sibling.
tsnode:prev_sibling() tsnode:prev_sibling() Get the node's previous sibling.
tsnode:next_named_sibling() tsnode:next_named_sibling() Get the node's next named sibling.
tsnode:prev_named_sibling() tsnode:prev_named_sibling() Get the node's previous named sibling.
tsnode:iter_children() tsnode:iter_children() Iterates over all the direct children of {tsnode}, regardless of whether they are named or not. Returns the child node plus the eventual field name corresponding to this child node.
tsnode:field({name}) tsnode:field() Returns a table of the nodes corresponding to the {name} field.
tsnode:child_count() tsnode:child_count() Get the node's number of children.
tsnode:child({index}) tsnode:child() Get the node's child at the given {index}, where zero represents the first child.
tsnode:named_child_count() tsnode:named_child_count() Get the node's number of named children.
tsnode:named_child({index}) tsnode:named_child() Get the node's named child at the given {index}, where zero represents the first named child.
tsnode:start() tsnode:start() Get the node's start position. Return three values: the row, column and total byte count (all zero-based).
tsnode:end_() tsnode:end_() Get the node's end position. Return three values: the row, column and total byte count (all zero-based).
tsnode:range() tsnode:range() Get the range of the node. Return four values: the row, column of the start position, then the row, column of the end position.
tsnode:type() tsnode:type() Get the node's type as a string.
tsnode:symbol() tsnode:symbol() Get the node's type as a numerical id.
tsnode:named() tsnode:named() Check if the node is named. Named nodes correspond to named rules in the grammar, whereas anonymous nodes correspond to string literals in the grammar.
tsnode:missing() tsnode:missing() Check if the node is missing. Missing nodes are inserted by the parser in order to recover from certain kinds of syntax errors.
tsnode:has_error() tsnode:has_error() Check if the node is a syntax error or contains any syntax errors.
tsnode:sexpr() tsnode:sexpr() Get an S-expression representing the node as a string.
tsnode:id() tsnode:id() Get an unique identifier for the node inside its own tree.
No guarantees are made about this identifier's internal representation, except for being a primitive Lua type with value equality (so not a table). Presently it is a (non-printable) string.
Note: The id is not guaranteed to be unique for nodes from different trees.
tsnode:descendant_for_range() tsnode:descendant_for_range({start_row}, {start_col}, {end_row}, {end_col}) Get the smallest node within this node that spans the given range of (row, column) positions
tsnode:named_descendant_for_range() tsnode:named_descendant_for_range({start_row}, {start_col}, {end_row}, {end_col}) Get the smallest named node within this node that spans the given range of (row, column) positions

TREESITTER QUERIES treesitter-query

Treesitter queries are a way to extract information about a parsed tstree, e.g., for the purpose of highlighting. Briefly, a query consists of one or more patterns. A pattern is defined over node types in the syntax tree. A match corresponds to specific elements of the syntax tree which match a pattern. Patterns may optionally define captures and predicates. A capture allows you to associate names with a specific node in a pattern. A predicate adds arbitrary metadata and conditional data to a match.
Queries are written in a lisp-like language documented in https://tree-sitter.github.io/tree-sitter/using-parsers#query-syntax Note: The predicates listed there page differ from those Nvim supports. See treesitter-predicates for a complete list of predicates supported by Nvim.
Nvim looks for queries as *.scm files in a queries directory under runtimepath, where each file contains queries for a specific language and purpose, e.g., queries/lua/highlights.scm for highlighting Lua files. By default, the first query on runtimepath is used (which usually implies that user config takes precedence over plugins, which take precedence over queries bundled with Neovim). If a query should extend other queries instead of replacing them, use treesitter-query-modeline-extends.
See lua-treesitter-query for the list of available methods for working with treesitter queries from Lua.

TREESITTER QUERY PREDICATES treesitter-predicates

Predicates are special scheme nodes that are evaluated to conditionally capture nodes. For example, the eq? predicate can be used as follows:
((identifier) @foo (#eq? @foo "foo"))
to only match identifier corresponding to the "foo" text.
The following predicates are built in:
eq? treesitter-predicate-eq? Match a string against the text corresponding to a node:
((identifier) @foo (#eq? @foo "foo"))
((node1) @left (node2) @right (#eq? @left @right))
match? treesitter-predicate-match? vim-match? treesitter-predicate-vim-match? Match a regexp against the text corresponding to a node:
((identifier) @constant (#match? @constant "^[A-Z_]+$"))
Note: The ^ and $ anchors will match the start and end of the node's text.
lua-match? treesitter-predicate-lua-match? Match lua-patterns against the text corresponding to a node, similar to match?
contains? treesitter-predicate-contains? Match a string against parts of the text corresponding to a node:
((identifier) @foo (#contains? @foo "foo"))
((identifier) @foo-bar (#contains? @foo-bar "foo" "bar"))
any-of? treesitter-predicate-any-of? Match any of the given strings against the text corresponding to a node:
((identifier) @foo (#any-of? @foo "foo" "bar"))
This is the recommended way to check if the node matches one of many keywords, as it has been optimized for this.
lua-treesitter-not-predicate Each predicate has a not- prefixed predicate that is just the negation of the predicate.
Further predicates can be added via vim.treesitter.query.add_predicate(). Use vim.treesitter.query.list_predicates() to list all available predicates.

TREESITTER QUERY DIRECTIVES treesitter-directives

Treesitter directives store metadata for a node or match and perform side effects. For example, the set! directive sets metadata on the match or node:
((identifier) @foo (#set! "type" "parameter"))
The following directives are built in:
set! treesitter-directive-set! Sets key/value metadata for a specific match or capture. Value is accessible as either metadata[key] (match specific) or metadata[capture_id][key] (capture specific).
Parameters:
{capture_id} (optional) {key} {value}
Examples:
((identifier) @foo (#set! @foo "kind" "parameter"))
((node1) @left (node2) @right (#set! "type" "pair"))
offset! treesitter-directive-offset! Takes the range of the captured node and applies an offset. This will generate a new range object for the captured node as metadata[capture_id].range.
Parameters:
{capture_id} {start_row} {start_col} {end_row} {end_col}
Example:
((identifier) @constant (#offset! @constant 0 1 0 -1))
Further directives can be added via vim.treesitter.query.add_directive(). Use vim.treesitter.query.list_directives() to list all available directives.

TREESITTER QUERY MODELINES treesitter-query-modeline

Neovim supports to customize the behavior of the queries using a set of "modelines", that is comments in the queries starting with ;. Here are the currently supported modeline alternatives:
inherits: {lang}... treesitter-query-modeline-inherits Specifies that this query should inherit the queries from {lang}. This will recursively descend in the queries of {lang} unless wrapped in parentheses: ({lang}). Note: This is meant to be used to include queries from another language. If you want your query to extend the queries of the same language, use extends.
extends treesitter-query-modeline-extends Specifies that this query should be used as an extension for the query, i.e. that it should be merged with the others. Note: The order of the extensions, and the query that will be used as a base depends on your 'runtimepath' value.
Note: These modeline comments must be at the top of the query, but can be repeated, for example, the following two modeline blocks are both valid:
;; inherits: foo,bar
;; extends

;; extends
;;
;; inherits: baz

TREESITTER SYNTAX HIGHLIGHTING treesitter-highlight

Syntax highlighting is specified through queries named highlights.scm, which match a tsnode in the parsed tstree to a capture that can be assigned a highlight group. For example, the query
(parameters (identifier) @parameter)
matches any identifier node inside a function parameter node (e.g., the bar in foo(bar)) to the capture named @parameter. It is also possible to match literal expressions (provided the parser returns them):
"return" @keyword.return
Assuming a suitable parser and highlights.scm query is found in runtimepath, treesitter highlighting for the current buffer can be enabled simply via vim.treesitter.start().
treesitter-highlight-groups The capture names, with @ included, are directly usable as highlight groups. For many commonly used captures, the corresponding highlight groups are linked to Nvim's standard highlight-groups by default but can be overridden in colorschemes.
A fallback system is implemented, so that more specific groups fallback to more generic ones. For instance, in a language that has separate doc comments, @comment.doc could be used. If this group is not defined, the highlighting for an ordinary @comment is used. This way, existing color schemes already work out of the box, but it is possible to add more specific variants for queries that make them available.
As an additional rule, capture highlights can always be specialized by language, by appending the language name after an additional dot. For instance, to highlight comments differently per language:
hi @comment.c guifg=Blue
hi @comment.lua @guifg=DarkBlue
hi link @comment.doc.java String
The following captures are linked by default to standard group-names: 
@text.literal      Comment
@text.reference    Identifier
@text.title        Title
@text.uri          Underlined
@text.underline    Underlined
@text.todo         Todo

@comment           Comment
@punctuation       Delimiter


@constant          Constant
@constant.builtin  Special
@constant.macro    Define
@define            Define
@macro             Macro
@string            String
@string.escape     SpecialChar
@string.special    SpecialChar
@character         Character
@character.special SpecialChar
@number            Number
@boolean           Boolean
@float             Float


@function          Function
@function.builtin  Special
@function.macro    Macro
@parameter         Identifier
@method            Function
@field             Identifier
@property          Identifier
@constructor       Special


@conditional       Conditional
@repeat            Repeat
@label             Label
@operator          Operator
@keyword           Keyword
@exception         Exception


@variable          Identifier
@type              Type
@type.definition   Typedef
@storageclass      StorageClass
@structure         Structure
@namespace         Identifier
@include           Include
@preproc           PreProc
@debug             Debug
@tag               Tag

treesitter-highlight-spell The special @spell capture can be used to indicate that a node should be spell checked by Nvim's builtin spell checker. For example, the following capture marks comments as to be checked:
(comment) @spell
There is also @nospell which disables spellchecking regions with @spell.
treesitter-highlight-conceal Treesitter highlighting supports conceal via the conceal metadata. By convention, nodes to be concealed are captured as @conceal, but any capture can be used. For example, the following query can be used to hide code block delimiters in Markdown:
(fenced_code_block_delimiter) @conceal (#set! conceal "")
It is also possible to replace a node with a single character, which (unlike legacy syntax) can be given a custom highlight. For example, the following (ill-advised) query replaces the != operator by a Unicode glyph, which is still highlighted the same as other operators:
"!=" @operator (#set! conceal "≠")
Conceals specified in this way respect 'conceallevel'.
treesitter-highlight-priority Treesitter uses nvim_buf_set_extmark() to set highlights with a default priority of 100. This enables plugins to set a highlighting priority lower or higher than tree-sitter. It is also possible to change the priority of an individual query pattern manually by setting its "priority" metadata attribute:
(super_important_node) @ImportantHighlight (#set! "priority" 105)

VIM.TREESITTER lua-treesitter

The remainder of this document is a reference manual for the vim.treesitter Lua module, which is the main interface for Nvim's tree-sitter integration. Most of the following content is automatically generated from the function documentation.
vim.treesitter.language_version The latest parser ABI version that is supported by the bundled tree-sitter library.
vim.treesitter.minimum_language_version The earliest parser ABI version that is supported by the bundled tree-sitter library.

Lua module: vim.treesitter lua-treesitter-core

get_captures_at_cursor({winnr}) get_captures_at_cursor() Returns a list of highlight capture names under the cursor
Parameters:
{winnr} (number|nil) Window handle or 0 for current window (default)
Return:
string[] List of capture names
get_captures_at_pos({bufnr}, {row}, {col}) get_captures_at_pos() Returns a list of highlight captures at the given position
Each capture is represented by a table containing the capture name as a string as well as a table of metadata (priority, conceal, ...; empty if none are defined).
Parameters:
{bufnr} (number) Buffer number (0 for current buffer)
{row} (number) Position row
{col} (number) Position column
Return:
table[] List of captures{ capture = "capture name", metadata = { ... } }` get_node_at_cursor({winnr}) get_node_at_cursor() Returns the smallest named node under the cursor
Parameters:
{winnr} (number|nil) Window handle or 0 for current window (default)
Return:
(string) Name of node under the cursor
get_node_at_pos({bufnr}, {row}, {col}, {opts}) get_node_at_pos() Returns the smallest named node at the given position
Parameters:
{bufnr} (number) Buffer number (0 for current buffer)
{row} (number) Position row
{col} (number) Position column
{opts} (table) Optional keyword arguments:
ignore_injections boolean Ignore injected languages (default true)
Return:
userdata tsnode under the cursor
get_node_range({node_or_range}) get_node_range() Returns the node's range or an unpacked range table
Parameters:
{node_or_range} (userdata|table) tsnode or table of positions
Return:
(table) { start_row, start_col, end_row, end_col }
get_parser({bufnr}, {lang}, {opts}) get_parser() Returns the parser for a specific buffer and filetype and attaches it to the buffer
If needed, this will create the parser.
Parameters:
{bufnr} (number|nil) Buffer the parser should be tied to (default: current buffer)
{lang} (string|nil) Filetype of this parser (default: buffer filetype)
{opts} (table|nil) Options to pass to the created language tree
Return:
LanguageTree LanguageTree object to use for parsing
get_string_parser({str}, {lang}, {opts}) get_string_parser() Returns a string parser
Parameters:
{str} (string) Text to parse
{lang} (string) Language of this string
{opts} (table|nil) Options to pass to the created language tree
Return:
LanguageTree LanguageTree object to use for parsing
is_ancestor({dest}, {source}) is_ancestor() Determines whether a node is the ancestor of another
Parameters:
{dest} userdata Possible ancestor tsnode
{source} userdata Possible descendant tsnode
Return:
(boolean) True if {dest} is an ancestor of {source}
is_in_node_range({node}, {line}, {col}) is_in_node_range() Determines whether (line, col) position is in node range
Parameters:
{node} userdata tsnode defining the range
{line} (number) Line (0-based)
{col} (number) Column (0-based)
Return:
(boolean) True if the position is in node range
node_contains({node}, {range}) node_contains() Determines if a node contains a range
Parameters:
{node} userdata tsnode
{range} (table)
Return:
(boolean) True if the {node} contains the {range}
start({bufnr}, {lang}) start() Starts treesitter highlighting for a buffer
Can be used in an ftplugin or FileType autocommand.
Note: By default, disables regex syntax highlighting, which may be required for some plugins. In this case, add vim.bo.syntax = 'on' after the call to start.
Example:
vim.api.nvim_create_autocmd( 'FileType', { pattern = 'tex',
    callback = function(args)
        vim.treesitter.start(args.buf, 'latex')
        vim.bo[args.buf].syntax = 'on'  -- only if additional legacy syntax is needed
    end
})
Parameters:
{bufnr} (number|nil) Buffer to be highlighted (default: current buffer)
{lang} (string|nil) Language of the parser (default: buffer filetype)
stop({bufnr}) stop() Stops treesitter highlighting for a buffer
Parameters:
{bufnr} (number|nil) Buffer to stop highlighting (default: current buffer)

Lua module: vim.treesitter.language lua-treesitter-language

inspect_language({lang}) inspect_language() Inspects the provided language.
Inspecting provides some useful information on the language like node names, ...
Parameters:
{lang} (string) Language
Return:
(table)
require_language() require_language({lang}, {path}, {silent}, {symbol_name}) Asserts that a parser for the language {lang} is installed.
Parsers are searched in the parser runtime directory, or the provided {path}
Parameters:
{lang} (string) Language the parser should parse
{path} (string|nil) Optional path the parser is located at
{silent} (boolean|nil) Don't throw an error if language not found
{symbol_name} (string|nil) Internal symbol name for the language to load
Return:
(boolean) If the specified language is installed

Lua module: vim.treesitter.query lua-treesitter-query

add_directive({name}, {handler}, {force}) add_directive() Adds a new directive to be used in queries
Handlers can set match level data by setting directly on the metadata object metadata.key = value, additionally, handlers can set node level data by using the capture id on the metadata table metadata[capture_id].key = value
Parameters:
{name} (string) Name of the directive, without leading #
{handler} function(match:string, pattern:string, bufnr:number, predicate:function, metadata:table)
add_predicate({name}, {handler}, {force}) add_predicate() Adds a new predicate to be used in queries
Parameters:
{name} (string) Name of the predicate, without leading #
{handler} function(match:string, pattern:string, bufnr:number, predicate:function)
get_node_text({node}, {source}, {opts}) get_node_text() Gets the text corresponding to a given node
Parameters:
{node} userdata tsnode
{source} (number|string) Buffer or string from which the {node} is extracted
{opts} (table|nil) Optional parameters.
concat: (boolean) Concatenate result in a string (default true)
Return:
(string[]|string)
get_query({lang}, {query_name}) get_query() Returns the runtime query {query_name} for {lang}.
Parameters:
{lang} (string) Language to use for the query
{query_name} (string) Name of the query (e.g. "highlights")
Return:
Query Parsed query
get_query_files() get_query_files({lang}, {query_name}, {is_included}) Gets the list of files used to make up a query
Parameters:
{lang} (string) Language to get query for
{query_name} (string) Name of the query to load (e.g., "highlights")
{is_included} (boolean|nil) Internal parameter, most of the time left as nil
Return:
string[] query_files List of files to load for given query and language
list_directives() list_directives() Lists the currently available directives to use in queries.
Return:
string[] List of supported directives.
list_predicates() list_predicates() Lists the currently available predicates to use in queries.
Return:
string[] List of supported predicates.
parse_query({lang}, {query}) parse_query() Parse {query} as a string. (If the query is in a file, the caller should read the contents into a string before calling).
Returns a Query (see lua-treesitter-query) object which can be used to search nodes in the syntax tree for the patterns defined in {query} using iter_* methods below.
Exposes info and captures with additional context about {query}.
captures contains the list of unique capture names defined in {query}. -`info.captures` also points to captures.
info.patterns contains information about predicates.
Parameters:
{lang} (string) Language to use for the query
{query} (string) Query in s-expr syntax
Return:
Query Parsed query
Query:iter_captures() Query:iter_captures({self}, {node}, {source}, {start}, {stop}) Iterate over all captures from all matches inside {node}
{source} is needed if the query contains predicates; then the caller must ensure to use a freshly parsed tree consistent with the current text of the buffer (if relevant). {start_row} and {end_row} can be used to limit matches inside a row range (this is typically used with root node as the {node}, i.e., to get syntax highlight matches in the current viewport). When omitted, the {start} and {end} row values are used from the given node.
The iterator returns three values: a numeric id identifying the capture, the captured node, and metadata from any directives processing the match. The following example shows how to get captures by name:
for id, node, metadata in query:iter_captures(tree:root(), bufnr, first, last) do
  local name = query.captures[id] -- name of the capture in the query
  -- typically useful info about the node:
  local type = node:type() -- type of the captured node
  local row1, col1, row2, col2 = node:range() -- range of the capture
  ... use the info here ...
end
Parameters:
{node} userdata tsnode under which the search will occur
{source} (number|string) Source buffer or string to extract text from
{start} (number) Starting line for the search
{stop} (number) Stopping line for the search (end-exclusive)
{self}
Return:
(number) capture Matching capture id (table) capture_node Capture for {node} (table) metadata for the {capture}
Query:iter_matches() Query:iter_matches({self}, {node}, {source}, {start}, {stop}) Iterates the matches of self on a given range.
Iterate over all matches within a {node}. The arguments are the same as for Query:iter_captures() but the iterated values are different: an (1-based) index of the pattern in the query, a table mapping capture indices to nodes, and metadata from any directives processing the match. If the query has more than one pattern, the capture table might be sparse and e.g. pairs() method should be used over ipairs . Here is an example iterating over all captures in every match:
for pattern, match, metadata in cquery:iter_matches(tree:root(), bufnr, first, last) do
  for id, node in pairs(match) do
    local name = query.captures[id]
    -- `node` was captured by the `name` capture in the match

local node_data = metadata[id] -- Node level metadata

... use the info here ...


end
end

Parameters:
{node} userdata tsnode under which the search will occur
{source} (number|string) Source buffer or string to search
{start} (number) Starting line for the search
{stop} (number) Stopping line for the search (end-exclusive)
{self}
Return:
(number) pattern id (table) match (table) metadata
set_query({lang}, {query_name}, {text}) set_query() Sets the runtime query named {query_name} for {lang}
This allows users to override any runtime files and/or configuration set by plugins.
Parameters:
{lang} (string) Language to use for the query
{query_name} (string) Name of the query (e.g., "highlights")
{text} (string) Query text (unparsed).

Lua module: vim.treesitter.highlighter lua-treesitter-highlighter

new({tree}, {opts}) highlighter.new() Creates a new highlighter using
Parameters:
{tree} LanguageTree LanguageTree parser object to use for highlighting
{opts} (table|nil) Configuration of the highlighter:
queries table overwrite queries used by the highlighter
Return:
TSHighlighter Created highlighter object
TSHighlighter:destroy({self}) TSHighlighter:destroy() Removes all internal references to the highlighter
Parameters:
{self}

Lua module: vim.treesitter.languagetree lua-treesitter-languagetree

LanguageTree:children({self}) LanguageTree:children() Returns a map of language to child tree.
Parameters:
{self}
LanguageTree:contains({self}, {range}) LanguageTree:contains() Determines whether {range} is contained in the LanguageTree.
Parameters:
{range} (table) { start_line, start_col, end_line, end_col }
{self}
Return:
(boolean)
LanguageTree:destroy({self}) LanguageTree:destroy() Destroys this LanguageTree and all its children.
Any cleanup logic should be performed here.
Note: This DOES NOT remove this tree from a parent. Instead, remove_child must be called on the parent to remove it.
Parameters:
{self}
LanguageTree:for_each_child() LanguageTree:for_each_child({self}, {fn}, {include_self}) Invokes the callback for each LanguageTree and its children recursively
Parameters:
{fn} function(tree: LanguageTree, lang: string)
{include_self} (boolean) Whether to include the invoking tree in the results
{self}
LanguageTree:for_each_tree({self}, {fn}) LanguageTree:for_each_tree() Invokes the callback for each LanguageTree recursively.
Note: This includes the invoking tree's child trees as well.
Parameters:
{fn} function(tree: TSTree, languageTree: LanguageTree)
{self}
LanguageTree:included_regions({self}) LanguageTree:included_regions() Gets the set of included regions
Parameters:
{self}
LanguageTree:invalidate({self}, {reload}) LanguageTree:invalidate() Invalidates this parser and all its children
Parameters:
{self}
LanguageTree:is_valid({self}) LanguageTree:is_valid() Determines whether this tree is valid. If the tree is invalid, call parse() . This will return the updated tree.
Parameters:
{self}
LanguageTree:lang({self}) LanguageTree:lang() Gets the language of this tree node.
Parameters:
{self}
LanguageTree:language_for_range() LanguageTree:language_for_range({self}, {range}) Gets the appropriate language that contains {range}.
Parameters:
{range} (table) { start_line, start_col, end_line, end_col }
{self}
Return:
LanguageTree Managing {range}
LanguageTree:named_node_for_range() LanguageTree:named_node_for_range({self}, {range}, {opts}) Gets the smallest named node that contains {range}.
Parameters:
{range} (table) { start_line, start_col, end_line, end_col }
{opts} (table|nil) Optional keyword arguments:
ignore_injections boolean Ignore injected languages (default true)
{self}
Return:
userdata|nil Found tsnode
LanguageTree:parse({self}) LanguageTree:parse() Parses all defined regions using a treesitter parser for the language this tree represents. This will run the injection query for this language to determine if any child languages should be created.
Parameters:
{self}
Return:
userdata[] Table of parsed tstree (table) Change list
LanguageTree:register_cbs({self}, {cbs}) LanguageTree:register_cbs() Registers callbacks for the LanguageTree.
Parameters:
{cbs} (table) An nvim_buf_attach()-like table argument with the following handlers:
on_bytes : see nvim_buf_attach(), but this will be called after the parsers callback.
on_changedtree : a callback that will be called every time the tree has syntactical changes. It will only be passed one argument, which is a table of the ranges (as node ranges) that changed.
on_child_added : emitted when a child is added to the tree.
on_child_removed : emitted when a child is removed from the tree.
{self}
LanguageTree:source({self}) LanguageTree:source() Returns the source content of the language tree (bufnr or string).
Parameters:
{self}
LanguageTree:tree_for_range() LanguageTree:tree_for_range({self}, {range}, {opts}) Gets the tree that contains {range}.
Parameters:
{range} (table) { start_line, start_col, end_line, end_col }
{opts} (table|nil) Optional keyword arguments:
ignore_injections boolean Ignore injected languages (default true)
{self}
Return:
userdata|nil Contained tstree
LanguageTree:trees({self}) LanguageTree:trees() Returns all trees this language tree contains. Does not include child languages.
Parameters:
{self}
new({source}, {lang}, {opts}) languagetree.new() A LanguageTree holds the treesitter parser for a given language {lang} used to parse a buffer. As the buffer may contain injected languages, the LanguageTree needs to store parsers for these child languages as well (which in turn may contain child languages themselves, hence the name).
Parameters:
{source} (number|string) Buffer or a string of text to parse
{lang} (string) Root language this tree represents
{opts} (table|nil) Optional keyword arguments:
injections table Mapping language to injection query strings. This is useful for overriding the built-in runtime file searching for the injection language query per language.
Return:
LanguageTree LanguageTree parser object