treesitter(docs): update and refresh docs

runtime/doc/lua.txt

@@ -574,6 +574,14 @@ 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.
 
+Parser files						*treesitter-parsers*
+
+Parsers are the heart of tree-sitter. They are libraries that tree-sitter will
+search for in the `parsers` runtime directory.
+
+For a parser to be available for a given language, there must be a file named
+`{lang}.so` within the parser directory.
+
 Parser methods						*lua-treesitter-parser*
 
 tsparser:parse()					*tsparser:parse()*
@@ -593,9 +601,9 @@ 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.
 
-tsparser:set_included_ranges(ranges)			*tsparser:set_included_ranges()*
+tsparser:set_included_ranges({ranges})			*tsparser:set_included_ranges()*
 	Changes the ranges the parser should consider. This is used for
-	language injection.  `ranges` should be of the form (all zero-based): >
+	language injection.  {ranges} should be of the form (all zero-based): >
 	{
 		{start_node, end_node},
 		...
@@ -617,15 +625,15 @@ tsnode:parent()						*tsnode:parent()*
 tsnode:child_count()					*tsnode:child_count()*
 	Get the node's number of children.
 
-tsnode:child(N)						*tsnode:child()*
+tsnode:child({index})						*tsnode:child()*
-	Get the node's child at the given index, where zero represents the
+	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(N)					*tsnode:named_child()*
+tsnode:named_child({index})					*tsnode:named_child()*
-	Get the node's named child at the given index, where zero represents
+	Get the node's named child at the given {index}, where zero represents
 	the first named child.
 
 tsnode:start()						*tsnode:start()*
@@ -661,12 +669,12 @@ tsnode:has_error()					*tsnode:has_error()*
 tsnode:sexpr()						*tsnode:sexpr()*
 	Get an S-expression representing the node as a string.
 
-tsnode:descendant_for_range(start_row, start_col, end_row, end_col)
+tsnode:descendant_for_range({start_row}, {start_col}, {end_row}, {end_col})
 						*tsnode:descendant_for_range()*
 	Get the smallest node within this node that spans the given range of
 	(row, column) positions
 
-tsnode:named_descendant_for_range(start_row, start_col, end_row, end_col)
+tsnode:named_descendant_for_range({start_row}, {start_col}, {end_row}, {end_col})
 					*tsnode:named_descendant_for_range()*
 	Get the smallest named node within this node that spans the given
 	range of (row, column) positions
@@ -677,17 +685,17 @@ Tree-sitter queries are supported, with some limitations. Currently, the only
 supported match predicate is `eq?` (both comparing a capture against a string
 and two captures against each other).
 
-vim.treesitter.parse_query(lang, query)
+vim.treesitter.parse_query({lang}, {query})
-						*vim.treesitter.parse_query(()*
+						*vim.treesitter.parse_query()*
-	Parse the query as a string. (If the query is in a file, the caller
+	Parse {query} as a string. (If the query is in a file, the caller
         should read the contents into a string before calling).
 
-query:iter_captures(node, bufnr, start_row, end_row)
+query:iter_captures({node}, {bufnr}, {start_row}, {end_row})
 							*query:iter_captures()*
-	Iterate over all captures from all matches inside a `node`.
+	Iterate over all captures from all matches inside {node}.
-	`bufnr` is needed if the query contains predicates, then the caller
+	{bufnr} 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. `start_row` and `end_row` can be used to limit
+	text of the buffer. {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)
@@ -704,7 +712,7 @@ query:iter_captures(node, bufnr, start_row, end_row)
 	  ... use the info here ...
 	end
 <
-query:iter_matches(node, bufnr, start_row, end_row)
+query:iter_matches({node}, {bufnr}, {start_row}, {end_row})
 							*query:iter_matches()*
 	Iterate over all matches within a node. The arguments are the same as
 	for |query:iter_captures()| but the iterated values are different:

runtime/lua/vim/treesitter.lua

@@ -10,6 +10,12 @@ local parsers = {}
 local Parser = {}
 Parser.__index = Parser
 
+--- Parses the buffer if needed and returns a tree.
+--
+-- Calling this will call the on_changedtree callbacks if the tree has changed.
+--
+-- @returns An up to date tree
+-- @returns If the tree changed with this call, the changed ranges
 function Parser:parse()
   if self.valid then
     return self.tree
@@ -40,6 +46,9 @@ function Parser:_on_lines(bufnr, changed_tick, start_row, old_stop_row, stop_row
   end
 end
 
+--- Sets the included ranges for the current parser
+--
+-- @param ranges A table of nodes that will be used as the ranges the parser should include.
 function Parser:set_included_ranges(ranges)
   self._parser:set_included_ranges(ranges)
   -- The buffer will need to be parsed again later

runtime/lua/vim/treesitter/highlighter.lua

@@ -7,9 +7,6 @@ local ts_hs_ns = a.nvim_create_namespace("treesitter_hl")
 
 -- These are conventions defined by tree-sitter, though it
 -- needs to be user extensible also.
--- TODO(bfredl): this is very much incomplete, we will need to
--- go through a few tree-sitter provided queries and decide
--- on translations that makes the most sense.
 TSHighlighter.hl_map = {
     ["error"] = "Error",
 
@@ -112,13 +109,10 @@ function TSHighlighter:set_query(query)
     query = vim.treesitter.get_query(self.parser.lang, 'highlights')
 
     if query == nil then
-      a.err_writeln("No highlights.scm query found for " .. self.parser.lang)
+      a.nvim_err_writeln("No highlights.scm query found for " .. self.parser.lang)
-
-      if query == nil then
       query = vim.treesitter.parse_query(self.parser.lang, "")
     end
   end
-  end
 
   self.query = query
 

runtime/lua/vim/treesitter/language.lua

@@ -2,6 +2,12 @@ local a = vim.api
 
 local M = {}
 
+--- Asserts that the provided language is installed, and optionnaly provide a path for the parser
+--
+-- Parsers are searched in the `parser` runtime directory.
+--
+-- @param lang The language the parser should parse
+-- @param path Optionnal path the parser is located at
 function M.require_language(lang, path)
   if vim._ts_has_language(lang) then
     return true
@@ -11,13 +17,18 @@ function M.require_language(lang, path)
     local paths = a.nvim_get_runtime_file(fname, false)
     if #paths == 0 then
       -- TODO(bfredl): help tag?
-      error("no parser for '"..lang.."' language")
+      error("no parser for '"..lang.."' language, see :help treesitter-parsers")
     end
     path = paths[1]
   end
   vim._ts_add_language(path, lang)
 end
 
+--- Inspects the provided language.
+--
+-- Inspecting provides some useful informations on the language like node names, ...
+--
+-- @param lang The language.
 function M.inspect_language(lang)
   M.require_language(lang)
   return vim._ts_inspect_language(lang)

runtime/lua/vim/treesitter/query.lua

@@ -67,6 +67,11 @@ local predicate_handlers = {
   end,
 }
 
+--- Adds a new predicates to be used in queries
+--
+-- @param name the name of the predicate, without leading #
+-- @param handler the handler function to be used
+--    signature will be (match, pattern, bufnr, predicate)
 function M.add_predicate(name, handler)
   if predicate_handlers[name] then
     a.nvim_err_writeln("It is recomended to not overwrite predicates.")
@@ -93,6 +98,15 @@ function Query:match_preds(match, pattern, bufnr)
   return true
 end
 
+--- Iterates of the captures of self on a given range.
+--
+-- @param node The node under witch the search will occur
+-- @param buffer The source buffer to search
+-- @param start The starting line of the search
+-- @param stop The stoping line of the search (end-exclusive)
+--
+-- @returns The matching capture id
+-- @returns The captured node
 function Query:iter_captures(node, bufnr, start, stop)
   if bufnr == 0 then
     bufnr = vim.api.nvim_get_current_buf()
@@ -112,6 +126,15 @@ function Query:iter_captures(node, bufnr, start, stop)
   return iter
 end
 
+--- Iterates of the matches of self on a given range.
+--
+-- @param node The node under witch the search will occur
+-- @param buffer The source buffer to search
+-- @param start The starting line of the search
+-- @param stop The stoping line of the search (end-exclusive)
+--
+-- @returns The matching pattern id
+-- @returns The matching match
 function Query:iter_matches(node, bufnr, start, stop)
   if bufnr == 0 then
     bufnr = vim.api.nvim_get_current_buf()