*lsp.txt*   LSP


                            NVIM REFERENCE MANUAL


LSP client/framework                                     *lsp* *LSP*

Nvim supports the Language Server Protocol (LSP), which means it acts as
a client to LSP servers and includes a Lua framework `vim.lsp` for building
enhanced LSP tools.

    https://microsoft.github.io/language-server-protocol/

LSP facilitates features like go-to-definition, find-references, hover,
completion, rename, format, refactor, etc., using semantic whole-project
analysis (unlike |ctags|).

                                      Type |gO| to see the table of contents.

==============================================================================
QUICKSTART                                              *lsp-quickstart*

Nvim provides an LSP client, but the servers are provided by third parties.
Follow these steps to get LSP features:

  1. Install language servers using your package manager or by
     following the upstream installation instruction.

     A list of language servers is available at:

     https://microsoft.github.io/language-server-protocol/implementors/servers/

  2. Configure the LSP client per language server.
     A minimal example:
>lua
    vim.lsp.start({
      name = 'my-server-name',
      cmd = {'name-of-language-server-executable'},
      root_dir = vim.fs.dirname(vim.fs.find({'setup.py', 'pyproject.toml'}, { upward = true })[1]),
    })
<
     See |vim.lsp.start()| for details.

  3. Configure keymaps and autocmds to utilize LSP features.
     See |lsp-config|.

                                                        *lsp-config*

Starting a LSP client will automatically report diagnostics via
|vim.diagnostic|. Read |vim.diagnostic.config()| to learn how to customize the
display.

It also sets some buffer options if the options are otherwise empty and if the
language server supports the functionality.

- 'omnifunc' is set to |vim.lsp.omnifunc()|. This allows to trigger completion
  using |i_CTRL-X_CTRL-O|
- 'tagfunc' is set to |vim.lsp.tagfunc()|. This enables features like
  go-to-definition, |:tjump|, and keymaps like |CTRL-]|, |CTRL-W_]|,
  |CTRL-W_}| to utilize the language server.
- 'formatexpr' is set to |vim.lsp.formatexpr()| if both 'formatprg' and
  'formatexpr' are empty. This allows to format lines via |gq| if the language
  server supports it.

To use other LSP features like hover, rename, etc. you can setup some
additional keymaps. It's recommended to setup them in a |LspAttach| autocmd to
ensure they're only active if there is a LSP client running. An example:
>lua
    vim.api.nvim_create_autocmd('LspAttach', {
      callback = function(args)
        vim.keymap.set('n', 'K', vim.lsp.buf.hover, { buffer = args.buf })
      end,
    })

<
The most used functions are:

- |vim.lsp.buf.hover()|
- |vim.lsp.buf.format()|
- |vim.lsp.buf.references()|
- |vim.lsp.buf.implementation()|
- |vim.lsp.buf.code_action()|


Not all language servers provide the same capabilities. To ensure you only set
keymaps if the language server supports a feature, you can guard the keymap
calls behind capability checks:
>lua
    vim.api.nvim_create_autocmd('LspAttach', {
      callback = function(args)
        local client = vim.lsp.get_client_by_id(args.data.client_id)
        if client.server_capabilities.hoverProvider then
          vim.keymap.set('n', 'K', vim.lsp.buf.hover, { buffer = args.buf })
        end
      end,
    })
<

To learn what capabilities are available you can run the following command in
a buffer with a started LSP client:

>vim
    :lua =vim.lsp.get_active_clients()[1].server_capabilities
<

Full list of features provided by default can be found in |lsp-buf|.

================================================================================
FAQ                                                     *lsp-faq*

- Q: How to force-reload LSP?
  A: Stop all clients, then reload the buffer. >vim

     :lua vim.lsp.stop_client(vim.lsp.get_active_clients())
     :edit

- Q: Why isn't completion working?
  A: In the buffer where you want to use LSP, check that 'omnifunc' is set to
     "v:lua.vim.lsp.omnifunc": >vim

     :verbose set omnifunc?

<     Some other plugin may be overriding the option. To avoid that, you could
     set the option in an |after-directory| ftplugin, e.g.
     "after/ftplugin/python.vim".

- Q: How do I run a request synchronously (e.g. for formatting on file save)?
  A: Check if the function has an `async` parameter and set the value to
  false.

     E.g. code formatting: >vim

     " Auto-format *.rs (rust) files prior to saving them
     " (async = false is the default for format)
     autocmd BufWritePre *.rs lua vim.lsp.buf.format({ async = false })

<
                                                           *lsp-vs-treesitter*
- Q: How do LSP and Treesitter compare?
  A: LSP requires a client and language server. The language server uses
     semantic analysis to understand code at a project level. This provides
     language servers with the ability to rename across files, find
     definitions in external libraries and more.

     Treesitter is a language parsing library that provides excellent tools
     for incrementally parsing text and handling errors. This makes it a great
     fit for editors to understand the contents of the current file for things
     like syntax highlighting, simple goto-definitions, scope analysis and
     more.

     LSP and Treesitter are both great tools for editing and inspecting code.

================================================================================
LSP API                                                 *lsp-api*

LSP core API is described at |lsp-core|.  Those are the core functions for
creating and managing clients.

The `vim.lsp.buf_…` functions perform operations for all LSP clients attached
to the given buffer. |lsp-buf|

LSP request/response handlers are implemented as Lua functions (see
|lsp-handler|). The |vim.lsp.handlers| table defines default handlers used
when creating a new client. Keys are LSP method names: >vim

    :lua print(vim.inspect(vim.tbl_keys(vim.lsp.handlers)))
<
                                                                  *lsp-method*

Methods are the names of requests and notifications as defined by the LSP
specification. These LSP requests/notifications are defined by default:

    callHierarchy/incomingCalls
    callHierarchy/outgoingCalls
    textDocument/codeAction
    textDocument/completion
    textDocument/declaration*
    textDocument/definition
    textDocument/documentHighlight
    textDocument/documentSymbol
    textDocument/formatting
    textDocument/hover
    textDocument/implementation*
    textDocument/publishDiagnostics
    textDocument/rangeFormatting
    textDocument/references
    textDocument/rename
    textDocument/signatureHelp
    textDocument/typeDefinition*
    window/logMessage
    window/showMessage
    window/showDocument
    window/showMessageRequest
    workspace/applyEdit
    workspace/symbol

* NOTE: These are sometimes not implemented by servers.

                                                                 *lsp-handler*

lsp-handlers are functions with special signatures that are designed to handle
responses and notifications from LSP servers.

For |lsp-request|, each |lsp-handler| has this signature: >

  function(err, result, ctx, config)
<
    Parameters: ~
        {err}       (table|nil)
                        When the language server is unable to complete a
                        request, a table with information about the error is
                        sent. Otherwise, it is `nil`. See |lsp-response|.
        {result}    (Result | Params | nil)
                        When the language server is able to successfully
                        complete a request, this contains the `result` key of
                        the response. See |lsp-response|.
        {ctx}       (table)
                        Context describes additional calling state associated
                        with the handler. It consists of the following key,
                        value pairs:

                        {method}    (string)
                                    The |lsp-method| name.
                        {client_id} (number)
                                    The ID of the |vim.lsp.client|.
                        {bufnr}     (Buffer)
                                    Buffer handle, or 0 for current.
                        {params}    (table|nil)
                                    The parameters used in the original
                                    request which resulted in this handler
                                    call.
        {config}    (table)
                        Configuration for the handler.

                        Each handler can define its own configuration table
                        that allows users to customize the behavior of a
                        particular handler.

                        To configure a particular |lsp-handler|, see:
                            |lsp-handler-configuration|


    Returns: ~
        The |lsp-handler| can respond by returning two values: `result, err`
        Where `err` must be shaped like an RPC error:
            `{ code, message, data? }`

        You can use |vim.lsp.rpc.rpc_response_error()| to create this object.

For |lsp-notification|, each |lsp-handler| has this signature: >

  function(err, result, ctx, config)
<
    Parameters: ~
        {err}       (nil)
                        This is always `nil`.
                        See |lsp-notification|
        {result}    (Result)
                        This contains the `params` key of the notification.
                        See |lsp-notification|
        {ctx}       (table)
                        Context describes additional calling state associated
                        with the handler. It consists of the following key,
                        value pairs:

                        {method}    (string)
                                        The |lsp-method| name.
                        {client_id} (number)
                                        The ID of the |vim.lsp.client|.
        {config}    (table)
                        Configuration for the handler.

                        Each handler can define its own configuration table
                        that allows users to customize the behavior of a
                        particular handler.

                        For an example, see:
                            |vim.lsp.diagnostic.on_publish_diagnostics()|

                        To configure a particular |lsp-handler|, see:
                            |lsp-handler-configuration|

    Returns: ~
        The |lsp-handler|'s return value will be ignored.

                                                   *lsp-handler-configuration*

To configure the behavior of a builtin |lsp-handler|, the convenient method
|vim.lsp.with()| is provided for users.

  To configure the behavior of |vim.lsp.diagnostic.on_publish_diagnostics()|,
  consider the following example, where a new |lsp-handler| is created using
  |vim.lsp.with()| that no longer generates signs for the diagnostics: >lua

    vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(
      vim.lsp.diagnostic.on_publish_diagnostics, {
        -- Disable signs
        signs = false,
      }
    )
<
  To enable signs, use |vim.lsp.with()| again to create and assign a new
  |lsp-handler| to |vim.lsp.handlers| for the associated method: >lua

    vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(
      vim.lsp.diagnostic.on_publish_diagnostics, {
        -- Enable signs
        signs = true,
      }
    )
<
  To configure a handler on a per-server basis, you can use the {handlers} key
  for |vim.lsp.start_client()| >lua

    vim.lsp.start_client {
      ..., -- Other configuration omitted.
      handlers = {
        ["textDocument/publishDiagnostics"] = vim.lsp.with(
          vim.lsp.diagnostic.on_publish_diagnostics, {
            -- Disable virtual_text
            virtual_text = false,
          }
        ),
      },
    }
<
  or if using "nvim-lspconfig", you can use the {handlers} key of `setup()`:
  >lua

    require('lspconfig').rust_analyzer.setup {
      handlers = {
        ["textDocument/publishDiagnostics"] = vim.lsp.with(
          vim.lsp.diagnostic.on_publish_diagnostics, {
            -- Disable virtual_text
            virtual_text = false
          }
        ),
      }
    }
<
  Some handlers do not have an explicitly named handler function (such as
  ||vim.lsp.diagnostic.on_publish_diagnostics()|). To override these, first
  create a reference to the existing handler: >lua

    local on_references = vim.lsp.handlers["textDocument/references"]
    vim.lsp.handlers["textDocument/references"] = vim.lsp.with(
      on_references, {
        -- Use location list instead of quickfix list
        loclist = true,
      }
    )
<
                                                      *lsp-handler-resolution*
Handlers can be set by:

- Setting a field in vim.lsp.handlers.                      *vim.lsp.handlers*
    vim.lsp.handlers is a global table that contains the default mapping of
    |lsp-method| names to |lsp-handlers|.

    To override the handler for the `"textDocument/definition"` method: >lua

    vim.lsp.handlers["textDocument/definition"] = my_custom_default_definition
<
- The {handlers} parameter for |vim.lsp.start_client()|.
    This will set the |lsp-handler| as the default handler for this server.

    For example: >lua

    vim.lsp.start_client {
      ..., -- Other configuration omitted.
      handlers = {
        ["textDocument/definition"] = my_custom_server_definition
      },
    }

- The {handler} parameter for |vim.lsp.buf_request()|.
    This will set the |lsp-handler| ONLY for the current request.

    For example: >lua

    vim.lsp.buf_request(
      0,
      "textDocument/definition",
      definition_params,
      my_request_custom_definition
    )
<
In summary, the |lsp-handler| will be chosen based on the current |lsp-method|
in the following order:

1. Handler passed to |vim.lsp.buf_request()|, if any.
2. Handler defined in |vim.lsp.start_client()|, if any.
3. Handler defined in |vim.lsp.handlers|, if any.

                                                            *vim.lsp.log_levels*
Log levels are defined in |vim.log.levels|


VIM.LSP.PROTOCOL                                              *vim.lsp.protocol*

Module `vim.lsp.protocol` defines constants dictated by the LSP specification,
and helper functions for creating protocol-related objects.
https://github.com/microsoft/language-server-protocol/raw/gh-pages/_specifications/specification-3-14.md

For example `vim.lsp.protocol.ErrorCodes` allows reverse lookup by number or
name: >lua

    vim.lsp.protocol.TextDocumentSyncKind.Full == 1
    vim.lsp.protocol.TextDocumentSyncKind[1] == "Full"
<

                                                                *lsp-response*
For the format of the response message, see:
    https://microsoft.github.io/language-server-protocol/specifications/specification-current/#responseMessage

                                                                *lsp-notification*
For the format of the notification message, see:
    https://microsoft.github.io/language-server-protocol/specifications/specification-current/#notificationMessage

                                                                *lsp-on-list-handler*

`on_list` receives a table with:

 - `items` table[], structured like |setqflist-what|
 - `title` string, title for the list.
 - `context` table|nil. `ctx` from |lsp-handler|

This table can be used with vim.fn.setqflist or vim.fn.setloclist. E.g.:
>lua
    local function on_list(options)
      vim.fn.setqflist({}, ' ', options)
      vim.api.nvim_command('cfirst')
    end

    vim.lsp.buf.definition{on_list=on_list}
    vim.lsp.buf.references(nil, {on_list=on_list})
<
If you prefer loclist do something like this:
>lua
    local function on_list(options)
      vim.fn.setloclist(0, {}, ' ', options)
      vim.api.nvim_command('lopen')
    end
<
================================================================================
LSP HIGHLIGHT                                                    *lsp-highlight*

Reference Highlights:

Highlight groups that are meant to be used by |vim.lsp.buf.document_highlight()|.

You can see more about the differences in types here:
https://microsoft.github.io/language-server-protocol/specification#textDocument_documentHighlight

                                                           *hl-LspReferenceText*
LspReferenceText          used for highlighting "text" references
                                                           *hl-LspReferenceRead*
LspReferenceRead          used for highlighting "read" references
                                                          *hl-LspReferenceWrite*
LspReferenceWrite         used for highlighting "write" references


                                                      *lsp-highlight-codelens*

Highlight groups related to |lsp-codelens| functionality.

                                                              *hl-LspCodeLens*
LspCodeLens
    Used to color the virtual text of the codelens. See
    |nvim_buf_set_extmark()|.

LspCodeLensSeparator                                 *hl-LspCodeLensSeparator*
    Used to color the separator between two or more code lenses.

                                                     *lsp-highlight-signature*

Highlight groups related to |vim.lsp.handlers.signature_help()|.

                                              *hl-LspSignatureActiveParameter*
LspSignatureActiveParameter
    Used to highlight the active parameter in the signature help. See
    |vim.lsp.handlers.signature_help()|.

==============================================================================
EVENTS                                                            *lsp-events*

                                                                   *LspAttach*
After an LSP client attaches to a buffer. The |autocmd-pattern| is the
name of the buffer. When used from Lua, the client ID is passed to the
callback in the "data" table. Example: >lua

    vim.api.nvim_create_autocmd("LspAttach", {
      callback = function(args)
        local bufnr = args.buf
        local client = vim.lsp.get_client_by_id(args.data.client_id)
        if client.server_capabilities.completionProvider then
          vim.bo[bufnr].omnifunc = "v:lua.vim.lsp.omnifunc"
        end
        if client.server_capabilities.definitionProvider then
          vim.bo[bufnr].tagfunc = "v:lua.vim.lsp.tagfunc"
        end
      end,
    })
<
                                                                   *LspDetach*
Just before an LSP client detaches from a buffer. The |autocmd-pattern| is the
name of the buffer. When used from Lua, the client ID is passed to the
callback in the "data" table. Example: >lua

    vim.api.nvim_create_autocmd("LspDetach", {
      callback = function(args)
        local client = vim.lsp.get_client_by_id(args.data.client_id)
        -- Do something with the client
        vim.cmd("setlocal tagfunc< omnifunc<")
      end,
    })
<
Also the following |User| |autocommand|s are provided:

LspProgressUpdate                                          *LspProgressUpdate*
    Upon receipt of a progress notification from the server. See
    |vim.lsp.util.get_progress_messages()|.

LspRequest                                                        *LspRequest*
    After a change to the active set of pending LSP requests. See {requests}
    in |vim.lsp.client|.

Example: >vim
    autocmd User LspProgressUpdate redrawstatus
    autocmd User LspRequest redrawstatus
<

==============================================================================
Lua module: vim.lsp                                                 *lsp-core*

buf_attach_client({bufnr}, {client_id})          *vim.lsp.buf_attach_client()*
    Implements the `textDocument/did…` notifications required to track a
    buffer for any language server.

    Without calling this, the server won't be notified of changes to a buffer.

    Parameters: ~
      • {bufnr}      (number) Buffer handle, or 0 for current
      • {client_id}  (number) Client id

buf_detach_client({bufnr}, {client_id})          *vim.lsp.buf_detach_client()*
    Detaches client from the specified buffer. Note: While the server is
    notified that the text document (buffer) was closed, it is still able to
    send notifications should it ignore this notification.

    Parameters: ~
      • {bufnr}      (number) Buffer handle, or 0 for current
      • {client_id}  (number) Client id

buf_is_attached({bufnr}, {client_id})              *vim.lsp.buf_is_attached()*
    Checks if a buffer is attached for a particular client.

    Parameters: ~
      • {bufnr}      (number) Buffer handle, or 0 for current
      • {client_id}  (number) the client id

buf_notify({bufnr}, {method}, {params})                 *vim.lsp.buf_notify()*
    Send a notification to a server

    Parameters: ~
      • {bufnr}   (number|nil) The number of the buffer
      • {method}  (string) Name of the request method
      • {params}  (any) Arguments to send to the server

    Return: ~
        (boolean) success true if any client returns true; false otherwise

                                                   *vim.lsp.buf_request_all()*
buf_request_all({bufnr}, {method}, {params}, {callback})
    Sends an async request for all active clients attached to the buffer.
    Executes the callback on the combined result. Parameters are the same as
    |vim.lsp.buf_request()| but the return result and callback are different.

    Parameters: ~
      • {bufnr}     (number) Buffer handle, or 0 for current.
      • {method}    (string) LSP method name
      • {params}    (table|nil) Parameters to send to the server
      • {callback}  (function) The callback to call when all requests are
                    finished. Unlike `buf_request`, this will collect all the
                    responses from each server instead of handling them. A map
                    of client_id:request_result will be provided to the
                    callback

    Return: ~
        fun() cancel A function that will cancel all requests

                                                  *vim.lsp.buf_request_sync()*
buf_request_sync({bufnr}, {method}, {params}, {timeout_ms})
    Sends a request to all server and waits for the response of all of them.

    Calls |vim.lsp.buf_request_all()| but blocks Nvim while awaiting the
    result. Parameters are the same as |vim.lsp.buf_request()| but the return
    result is different. Wait maximum of {timeout_ms} (default 1000) ms.

    Parameters: ~
      • {bufnr}       (number) Buffer handle, or 0 for current.
      • {method}      (string) LSP method name
      • {params}      (table|nil) Parameters to send to the server
      • {timeout_ms}  (number|nil) Maximum time in milliseconds to wait for a
                      result. Defaults to 1000

    Return: ~
        table<integer, any>|nil result, string|nil err Map of
        client_id:request_result. On timeout, cancel or error, returns `(nil,
        err)` where `err` is a string describing the failure reason.

client()                                                      *vim.lsp.client*
    LSP client object. You can get an active client object via
    |vim.lsp.get_client_by_id()| or |vim.lsp.get_active_clients()|.

    • Methods:
      • request(method, params, [handler], bufnr) Sends a request to the
        server. This is a thin wrapper around {client.rpc.request} with some
        additional checking. If {handler} is not specified, If one is not
        found there, then an error will occur. Returns: {status},
        {[client_id]}. {status} is a boolean indicating if the notification
        was successful. If it is `false`, then it will always be `false` (the
        client has shutdown). If {status} is `true`, the function returns
        {request_id} as the second result. You can use this with
        `client.cancel_request(request_id)` to cancel the request.
      • request_sync(method, params, timeout_ms, bufnr) Sends a request to the
        server and synchronously waits for the response. This is a wrapper
        around {client.request} Returns: { err=err, result=result }, a
        dictionary, where `err` and `result` come from the |lsp-handler|. On
        timeout, cancel or error, returns `(nil, err)` where `err` is a string
        describing the failure reason. If the request was unsuccessful returns
        `nil`.
      • notify(method, params) Sends a notification to an LSP server. Returns:
        a boolean to indicate if the notification was successful. If it is
        false, then it will always be false (the client has shutdown).
      • cancel_request(id) Cancels a request with a given request id. Returns:
        same as `notify()`.
      • stop([force]) Stops a client, optionally with force. By default, it
        will just ask the server to shutdown without force. If you request to
        stop a client which has previously been requested to shutdown, it will
        automatically escalate and force shutdown.
      • is_stopped() Checks whether a client is stopped. Returns: true if the
        client is fully stopped.
      • on_attach(client, bufnr) Runs the on_attach function from the client's
        config if it was defined. Useful for buffer-local setup.

    • Members
      • {id} (number): The id allocated to the client.
      • {name} (string): If a name is specified on creation, that will be
        used. Otherwise it is just the client id. This is used for logs and
        messages.
      • {rpc} (table): RPC client object, for low level interaction with the
        client. See |vim.lsp.rpc.start()|.
      • {offset_encoding} (string): The encoding used for communicating with
        the server. You can modify this in the `config`'s `on_init` method
        before text is sent to the server.
      • {handlers} (table): The handlers used by the client as described in
        |lsp-handler|.
      • {requests} (table): The current pending requests in flight to the
        server. Entries are key-value pairs with the key being the request ID
        while the value is a table with `type`, `bufnr`, and `method`
        key-value pairs. `type` is either "pending" for an active request, or
        "cancel" for a cancel request.
      • {config} (table): copy of the table that was passed by the user to
        |vim.lsp.start_client()|.
      • {server_capabilities} (table): Response from the server sent on
        `initialize` describing the server's capabilities.

client_is_stopped({client_id})                   *vim.lsp.client_is_stopped()*
    Checks whether a client is stopped.

    Parameters: ~
      • {client_id}  (number)

    Return: ~
        (boolean) stopped true if client is stopped, false otherwise.

                                            *vim.lsp.for_each_buffer_client()*
for_each_buffer_client({bufnr}, {fn})
    Invokes a function for each LSP client attached to a buffer.

    Parameters: ~
      • {bufnr}  (number) Buffer number
      • {fn}     (function) Function to run on each client attached to buffer
                 {bufnr}. The function takes the client, client ID, and buffer
                 number as arguments. Example: >lua

                   vim.lsp.for_each_buffer_client(0, function(client, client_id, bufnr)
                     print(vim.inspect(client))
                   end)
<

formatexpr({opts})                                      *vim.lsp.formatexpr()*
    Provides an interface between the built-in client and a `formatexpr`
    function.

    Currently only supports a single client. This can be set via `setlocal
    formatexpr=v:lua.vim.lsp.formatexpr()` but will typically or in
    `on_attach` via `vim.api.nvim_buf_set_option(bufnr, 'formatexpr',
    'v:lua.vim.lsp.formatexpr(#{timeout_ms:250})')`.

    Parameters: ~
      • {opts}  (table) options for customizing the formatting expression
                which takes the following optional keys:
                • timeout_ms (default 500ms). The timeout period for the
                  formatting request.

get_active_clients({filter})                    *vim.lsp.get_active_clients()*
    Get active clients.

    Parameters: ~
      • {filter}  (table|nil) A table with key-value pairs used to filter the
                  returned clients. The available keys are:
                  • id (number): Only return clients with the given id
                  • bufnr (number): Only return clients attached to this
                    buffer
                  • name (string): Only return clients with the given name

    Return: ~
        (table) List of |vim.lsp.client| objects

                                          *vim.lsp.get_buffers_by_client_id()*
get_buffers_by_client_id({client_id})
    Returns list of buffers attached to client_id.

    Parameters: ~
      • {client_id}  (integer) client id

    Return: ~
        integer[] buffers list of buffer ids

get_client_by_id({client_id})                     *vim.lsp.get_client_by_id()*
    Gets a client by id, or nil if the id is invalid. The returned client may
    not yet be fully initialized.

    Parameters: ~
      • {client_id}  (number) client id

    Return: ~
        |vim.lsp.client| object, or nil

get_log_path()                                        *vim.lsp.get_log_path()*
    Gets the path of the logfile used by the LSP client.

    Return: ~
        (string) path to log file

omnifunc({findstart}, {base})                             *vim.lsp.omnifunc()*
    Implements 'omnifunc' compatible LSP completion.

    Parameters: ~
      • {findstart}  (number) 0 or 1, decides behavior
      • {base}       (number) findstart=0, text to match against

    Return: ~
        (number) Decided by {findstart}:
        • findstart=0: column where the completion starts, or -2 or -3
        • findstart=1: list of matches (actually just calls |complete()|)

    See also: ~
        |complete-functions|
        |complete-items|
        |CompleteDone|

set_log_level({level})                               *vim.lsp.set_log_level()*
    Sets the global log level for LSP logging.

    Levels by name: "TRACE", "DEBUG", "INFO", "WARN", "ERROR", "OFF"

    Level numbers begin with "TRACE" at 0

    Use `lsp.log_levels` for reverse lookup.

    Parameters: ~
      • {level}  (number|string) the case insensitive level name or number

    See also: ~
        |vim.lsp.log_levels|

start({config}, {opts})                                      *vim.lsp.start()*
    Create a new LSP client and start a language server or reuses an already
    running client if one is found matching `name` and `root_dir`. Attaches
    the current buffer to the client.

    Example: >lua

     vim.lsp.start({
        name = 'my-server-name',
        cmd = {'name-of-language-server-executable'},
        root_dir = vim.fs.dirname(vim.fs.find({'pyproject.toml', 'setup.py'}, { upward = true })[1]),
     })
<

    See |vim.lsp.start_client()| for all available options. The most important
    are:

    • `name` arbitrary name for the LSP client. Should be unique per language
      server.
    • `cmd` command (in list form) used to start the language server. Must be
      absolute, or found on `$PATH`. Shell constructs like `~` are not
      expanded.
    • `root_dir` path to the project root. By default this is used to decide
      if an existing client should be re-used. The example above uses
      |vim.fs.find()| and |vim.fs.dirname()| to detect the root by traversing
      the file system upwards starting from the current directory until either
      a `pyproject.toml` or `setup.py` file is found.
    • `workspace_folders` list of `{ uri:string, name: string }` tables
      specifying the project root folders used by the language server. If
      `nil` the property is derived from `root_dir` for convenience.

    Language servers use this information to discover metadata like the
    dependencies of your project and they tend to index the contents within
    the project folder.

    To ensure a language server is only started for languages it can handle,
    make sure to call |vim.lsp.start()| within a |FileType| autocmd. Either
    use |:au|, |nvim_create_autocmd()| or put the call in a
    `ftplugin/<filetype_name>.lua` (See |ftplugin-name|)

    Parameters: ~
      • {config}  (table) Same configuration as documented in
                  |vim.lsp.start_client()|
      • {opts}    nil|table Optional keyword arguments:
                  • reuse_client (fun(client: client, config: table): boolean)
                    Predicate used to decide if a client should be re-used.
                    Used on all running clients. The default implementation
                    re-uses a client if name and root_dir matches.
                  • bufnr (number) Buffer handle to attach to if starting or
                    re-using a client (0 for current).

    Return: ~
        (number|nil) client_id

start_client({config})                                *vim.lsp.start_client()*
    Starts and initializes a client with the given configuration.

    Field `cmd` in {config} is required.

    Parameters: ~
      • {config}  (table) Configuration for the server:
                  • cmd: (table|string|fun(dispatchers: table):table) command
                    string or list treated like |jobstart()|. The command must
                    launch the language server process. `cmd` can also be a
                    function that creates an RPC client. The function receives
                    a dispatchers table and must return a table with the
                    functions `request`, `notify`, `is_closing` and
                    `terminate` See |vim.lsp.rpc.request()| and
                    |vim.lsp.rpc.notify()| For TCP there is a built-in rpc
                    client factory: |vim.lsp.rpc.connect()|
                  • cmd_cwd: (string, default=|getcwd()|) Directory to launch
                    the `cmd` process. Not related to `root_dir`.
                  • cmd_env: (table) Environment flags to pass to the LSP on
                    spawn. Can be specified using keys like a map or as a list
                    with `k=v` pairs or both. Non-string values are coerced to string.
                    Example: >

                       { "PRODUCTION=true"; "TEST=123"; PORT = 8080; HOST = "0.0.0.0"; }
<
                  • detached: (boolean, default true) Daemonize the server
                    process so that it runs in a separate process group from
                    Nvim. Nvim will shutdown the process on exit, but if Nvim
                    fails to exit cleanly this could leave behind orphaned
                    server processes.
                  • workspace_folders: (table) List of workspace folders
                    passed to the language server. For backwards compatibility
                    rootUri and rootPath will be derived from the first
                    workspace folder in this list. See `workspaceFolders` in
                    the LSP spec.
                  • capabilities: Map overriding the default capabilities
                    defined by |vim.lsp.protocol.make_client_capabilities()|,
                    passed to the language server on initialization. Hint: use
                    make_client_capabilities() and modify its result.
                    • Note: To send an empty dictionary use
                      `{[vim.type_idx]=vim.types.dictionary}`, else it will be
                      encoded as an array.

                  • handlers: Map of language server method names to
                    |lsp-handler|
                  • settings: Map with language server specific settings.
                    These are returned to the language server if requested via
                    `workspace/configuration`. Keys are case-sensitive.
                  • commands: table Table that maps string of clientside
                    commands to user-defined functions. Commands passed to
                    start_client take precedence over the global command
                    registry. Each key must be a unique command name, and the
                    value is a function which is called if any LSP action
                    (code action, code lenses, ...) triggers the command.
                  • init_options Values to pass in the initialization request
                    as `initializationOptions`. See `initialize` in the LSP
                    spec.
                  • name: (string, default=client-id) Name in log messages.
                  • get_language_id: function(bufnr, filetype) -> language ID
                    as string. Defaults to the filetype.
                  • offset_encoding: (default="utf-16") One of "utf-8",
                    "utf-16", or "utf-32" which is the encoding that the LSP
                    server expects. Client does not verify this is correct.
                  • on_error: Callback with parameters (code, ...), invoked
                    when the client operation throws an error. `code` is a
                    number describing the error. Other arguments may be passed
                    depending on the error kind. See
                    `vim.lsp.rpc.client_errors` for possible errors. Use
                    `vim.lsp.rpc.client_errors[code]` to get human-friendly
                    name.
                  • before_init: Callback with parameters (initialize_params,
                    config) invoked before the LSP "initialize" phase, where
                    `params` contains the parameters being sent to the server
                    and `config` is the config that was passed to
                    |vim.lsp.start_client()|. You can use this to modify
                    parameters before they are sent.
                  • on_init: Callback (client, initialize_result) invoked
                    after LSP "initialize", where `result` is a table of
                    `capabilities` and anything else the server may send. For
                    example, clangd sends `initialize_result.offsetEncoding`
                    if `capabilities.offsetEncoding` was sent to it. You can
                    only modify the `client.offset_encoding` here before any
                    notifications are sent. Most language servers expect to be
                    sent client specified settings after initialization.
                    Neovim does not make this assumption. A
                    `workspace/didChangeConfiguration` notification should be
                    sent to the server during on_init.
                  • on_exit Callback (code, signal, client_id) invoked on
                    client exit.
                    • code: exit code of the process
                    • signal: number describing the signal used to terminate
                      (if any)
                    • client_id: client handle

                  • on_attach: Callback (client, bufnr) invoked when client
                    attaches to a buffer.
                  • trace: ("off" | "messages" | "verbose" | nil) passed
                    directly to the language server in the initialize request.
                    Invalid/empty values will default to "off"
                  • flags: A table with flags for the client. The current
                    (experimental) flags are:
                    • allow_incremental_sync (bool, default true): Allow using
                      incremental sync for buffer edits
                    • debounce_text_changes (number, default 150): Debounce
                      didChange notifications to the server by the given
                      number in milliseconds. No debounce occurs if nil
                    • exit_timeout (number|boolean, default false):
                      Milliseconds to wait for server to exit cleanly after
                      sending the "shutdown" request before sending kill -15.
                      If set to false, nvim exits immediately after sending
                      the "shutdown" request to the server.

                  • root_dir: (string) Directory where the LSP server will
                    base its workspaceFolders, rootUri, and rootPath on
                    initialization.

    Return: ~
        (integer|nil) client_id. |vim.lsp.get_client_by_id()| Note: client may
        not be fully initialized. Use `on_init` to do any actions once the
        client has been initialized.

stop_client({client_id}, {force})                      *vim.lsp.stop_client()*
    Stops a client(s).

    You can also use the `stop()` function on a |vim.lsp.client| object. To stop all clients: >lua

     vim.lsp.stop_client(vim.lsp.get_active_clients())
<

    By default asks the server to shutdown, unless stop was requested already
    for this client, then force-shutdown is attempted.

    Parameters: ~
      • {client_id}  number|table id or |vim.lsp.client| object, or list
                     thereof
      • {force}      (boolean|nil) shutdown forcefully

tagfunc({...})                                             *vim.lsp.tagfunc()*
    Provides an interface between the built-in client and 'tagfunc'.

    When used with normal mode commands (e.g. |CTRL-]|) this will invoke the
    "textDocument/definition" LSP method to find the tag under the cursor.
    Otherwise, uses "workspace/symbol". If no results are returned from any
    LSP servers, falls back to using built-in tags.

    Parameters: ~
      • {pattern}  (string) Pattern used to find a workspace symbol
      • {flags}    (string) See |tag-function|

    Return: ~
        table[] tags A list of matching tags

with({handler}, {override_config})                            *vim.lsp.with()*
    Function to manage overriding defaults for LSP handlers.

    Parameters: ~
      • {handler}          (function) See |lsp-handler|
      • {override_config}  (table) Table containing the keys to override
                           behavior of the {handler}


==============================================================================
Lua module: vim.lsp.buf                                              *lsp-buf*

                                          *vim.lsp.buf.add_workspace_folder()*
add_workspace_folder({workspace_folder})
    Add the folder at path to the workspace folders. If {path} is not
    provided, the user will be prompted for a path using |input()|.

clear_references()                            *vim.lsp.buf.clear_references()*
    Removes document highlights from current buffer.

code_action({options})                             *vim.lsp.buf.code_action()*
    Selects a code action available at the current cursor position.

    Parameters: ~
      • {options}  (table|nil) Optional table which holds the following
                   optional fields:
                   • context: (table|nil) Corresponds to `CodeActionContext` of the LSP specification:
                     • diagnostics (table|nil): LSP`Diagnostic[]` . Inferred from the current position if not provided.
                     • only (table|nil): List of LSP `CodeActionKind`s used to
                       filter the code actions. Most language servers support
                       values like `refactor` or `quickfix`.
                     • triggerKind (number|nil): The reason why code actions
                       were requested.

                   • filter: (function|nil) Predicate taking an `CodeAction`
                     and returning a boolean.
                   • apply: (boolean|nil) When set to `true`, and there is
                     just one remaining action (after filtering), the action
                     is applied without user query.
                   • range: (table|nil) Range for which code actions should be
                     requested. If in visual mode this defaults to the active
                     selection. Table must contain `start` and `end` keys with
                     {row, col} tuples using mark-like indexing. See
                     |api-indexing|

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_codeAction
        vim.lsp.protocol.constants.CodeActionTriggerKind

completion({context})                               *vim.lsp.buf.completion()*
    Retrieves the completion items at the current cursor position. Can only be
    called in Insert mode.

    Parameters: ~
      • {context}  (context support not yet implemented) Additional
                   information about the context in which a completion was
                   triggered (how it was triggered, and by which trigger
                   character, if applicable)

    See also: ~
        vim.lsp.protocol.constants.CompletionTriggerKind

declaration({options})                             *vim.lsp.buf.declaration()*
    Jumps to the declaration of the symbol under the cursor.
    Note:
        Many servers do not implement this method. Generally, see
        |vim.lsp.buf.definition()| instead.

    Parameters: ~
      • {options}  (table|nil) additional options
                   • reuse_win: (boolean) Jump to existing window if buffer is
                     already open.
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

definition({options})                               *vim.lsp.buf.definition()*
    Jumps to the definition of the symbol under the cursor.

    Parameters: ~
      • {options}  (table|nil) additional options
                   • reuse_win: (boolean) Jump to existing window if buffer is
                     already open.
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

document_highlight()                        *vim.lsp.buf.document_highlight()*
    Send request to the server to resolve document highlights for the current
    text document position. This request can be triggered by a key mapping or
    by events such as `CursorHold` , e.g.: >vim
      autocmd CursorHold  <buffer> lua vim.lsp.buf.document_highlight()
      autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight()
      autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
<

    Note: Usage of |vim.lsp.buf.document_highlight()| requires the following
    highlight groups to be defined or you won't be able to see the actual
    highlights. |hl-LspReferenceText| |hl-LspReferenceRead|
    |hl-LspReferenceWrite|

document_symbol({options})                     *vim.lsp.buf.document_symbol()*
    Lists all symbols in the current buffer in the quickfix window.

    Parameters: ~
      • {options}  (table|nil) additional options
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

execute_command({command_params})              *vim.lsp.buf.execute_command()*
    Executes an LSP server command.

    Parameters: ~
      • {command_params}  (table) A valid `ExecuteCommandParams` object

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#workspace_executeCommand

format({options})                                       *vim.lsp.buf.format()*
    Formats a buffer using the attached (and optionally filtered) language
    server clients.

    Parameters: ~
      • {options}  table|nil Optional table which holds the following optional
                   fields:
                   • formatting_options (table|nil): Can be used to specify
                     FormattingOptions. Some unspecified options will be
                     automatically derived from the current Neovim options.
                     See https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#formattingOptions
                   • timeout_ms (integer|nil, default 1000): Time in
                     milliseconds to block for formatting requests. No effect
                     if async=true
                   • bufnr (number|nil): Restrict formatting to the clients
                     attached to the given buffer, defaults to the current
                     buffer (0).
                   • filter (function|nil): Predicate used to filter clients.
                     Receives a client as argument and must return a boolean.
                     Clients matching the predicate are included. Example:               • >lua

              -- Never request typescript-language-server for formatting
              vim.lsp.buf.format {
                filter = function(client) return client.name ~= "tsserver" end
              }
<
                   • async boolean|nil If true the method won't block.
                     Defaults to false. Editing the buffer while formatting
                     asynchronous can lead to unexpected changes.
                   • id (number|nil): Restrict formatting to the client with
                     ID (client.id) matching this field.
                   • name (string|nil): Restrict formatting to the client with
                     name (client.name) matching this field.
                   • range (table|nil) Range to format. Table must contain
                     `start` and `end` keys with {row, col} tuples using (1,0)
                     indexing. Defaults to current selection in visual mode
                     Defaults to `nil` in other modes, formatting the full
                     buffer

hover()                                                  *vim.lsp.buf.hover()*
    Displays hover information about the symbol under the cursor in a floating
    window. Calling the function twice will jump into the floating window.

implementation({options})                       *vim.lsp.buf.implementation()*
    Lists all the implementations for the symbol under the cursor in the
    quickfix window.

    Parameters: ~
      • {options}  (table|nil) additional options
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

incoming_calls()                                *vim.lsp.buf.incoming_calls()*
    Lists all the call sites of the symbol under the cursor in the |quickfix|
    window. If the symbol can resolve to multiple items, the user can pick one
    in the |inputlist()|.

list_workspace_folders()                *vim.lsp.buf.list_workspace_folders()*
    List workspace folders.

outgoing_calls()                                *vim.lsp.buf.outgoing_calls()*
    Lists all the items that are called by the symbol under the cursor in the
    |quickfix| window. If the symbol can resolve to multiple items, the user
    can pick one in the |inputlist()|.

references({context}, {options})                    *vim.lsp.buf.references()*
    Lists all the references to the symbol under the cursor in the quickfix
    window.

    Parameters: ~
      • {context}  (table|nil) Context for the request
      • {options}  (table|nil) additional options
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_references

                                       *vim.lsp.buf.remove_workspace_folder()*
remove_workspace_folder({workspace_folder})
    Remove the folder at path from the workspace folders. If {path} is not
    provided, the user will be prompted for a path using |input()|.

rename({new_name}, {options})                           *vim.lsp.buf.rename()*
    Renames all references to the symbol under the cursor.

    Parameters: ~
      • {new_name}  (string|nil) If not provided, the user will be prompted
                    for a new name using |vim.ui.input()|.
      • {options}   (table|nil) additional options
                    • filter (function|nil): Predicate used to filter clients.
                      Receives a client as argument and must return a boolean.
                      Clients matching the predicate are included.
                    • name (string|nil): Restrict clients used for rename to
                      ones where client.name matches this field.

server_ready()                                    *vim.lsp.buf.server_ready()*
    Checks whether the language servers attached to the current buffer are
    ready.

    Return: ~
        `true` if server responds.

signature_help()                                *vim.lsp.buf.signature_help()*
    Displays signature information about the symbol under the cursor in a
    floating window.

type_definition({options})                     *vim.lsp.buf.type_definition()*
    Jumps to the definition of the type of the symbol under the cursor.

    Parameters: ~
      • {options}  (table|nil) additional options
                   • reuse_win: (boolean) Jump to existing window if buffer is
                     already open.
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|

workspace_symbol({query}, {options})          *vim.lsp.buf.workspace_symbol()*
    Lists all symbols in the current workspace in the quickfix window.

    The list is filtered against {query}; if the argument is omitted from the
    call, the user is prompted to enter a string on the command line. An empty
    string means no filtering is done.

    Parameters: ~
      • {query}    (string, optional)
      • {options}  (table|nil) additional options
                   • on_list: (function) handler for list results. See
                     |lsp-on-list-handler|


==============================================================================
Lua module: vim.lsp.diagnostic                                *lsp-diagnostic*

get_namespace({client_id})                *vim.lsp.diagnostic.get_namespace()*
    Get the diagnostic namespace associated with an LSP client
    |vim.diagnostic|.

    Parameters: ~
      • {client_id}  (number) The id of the LSP client

                                 *vim.lsp.diagnostic.on_publish_diagnostics()*
on_publish_diagnostics({_}, {result}, {ctx}, {config})
    |lsp-handler| for the method "textDocument/publishDiagnostics"

    See |vim.diagnostic.config()| for configuration options. Handler-specific
    configuration can be set using |vim.lsp.with()|: >lua

     vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(
       vim.lsp.diagnostic.on_publish_diagnostics, {
         -- Enable underline, use default values
         underline = true,
         -- Enable virtual text, override spacing to 4
         virtual_text = {
           spacing = 4,
         },
         -- Use a function to dynamically turn signs off
         -- and on, using buffer local variables
         signs = function(namespace, bufnr)
           return vim.b[bufnr].show_signs == true
         end,
         -- Disable a feature
         update_in_insert = false,
       }
     )
<

    Parameters: ~
      • {config}  (table) Configuration table (see |vim.diagnostic.config()|).


==============================================================================
Lua module: vim.lsp.codelens                                    *lsp-codelens*

clear({client_id}, {bufnr})                         *vim.lsp.codelens.clear()*
    Clear the lenses

    Parameters: ~
      • {client_id}  (number|nil) filter by client_id. All clients if nil
      • {bufnr}      (number|nil) filter by buffer. All buffers if nil

display({lenses}, {bufnr}, {client_id})           *vim.lsp.codelens.display()*
    Display the lenses using virtual text

    Parameters: ~
      • {lenses}     (table) of lenses to display (`CodeLens[] | null`)
      • {bufnr}      (number)
      • {client_id}  (number)

get({bufnr})                                          *vim.lsp.codelens.get()*
    Return all lenses for the given buffer

    Parameters: ~
      • {bufnr}  (number) Buffer number. 0 can be used for the current buffer.

    Return: ~
        (table) (`CodeLens[]`)

                                              *vim.lsp.codelens.on_codelens()*
on_codelens({err}, {result}, {ctx}, {_})
    |lsp-handler| for the method `textDocument/codeLens`

refresh()                                         *vim.lsp.codelens.refresh()*
    Refresh the codelens for the current buffer

    It is recommended to trigger this using an autocmd or via keymap.

    Example: >vim
      autocmd BufEnter,CursorHold,InsertLeave <buffer> lua vim.lsp.codelens.refresh()
<

run()                                                 *vim.lsp.codelens.run()*
    Run the code lens in the current line

save({lenses}, {bufnr}, {client_id})                 *vim.lsp.codelens.save()*
    Store lenses for a specific buffer and client

    Parameters: ~
      • {lenses}     (table) of lenses to store (`CodeLens[] | null`)
      • {bufnr}      (number)
      • {client_id}  (number)


==============================================================================
Lua module: vim.lsp.semantic_tokens                      *lsp-semantic_tokens*

force_refresh({bufnr})               *vim.lsp.semantic_tokens.force_refresh()*
    Force a refresh of all semantic tokens

    Only has an effect if the buffer is currently active for semantic token
    highlighting (|vim.lsp.semantic_tokens.start()| has been called for it)

    Parameters: ~
      • {bufnr}  (nil|number) default: current buffer

                                        *vim.lsp.semantic_tokens.get_at_pos()*
get_at_pos({bufnr}, {row}, {col})
    Return the semantic token(s) at the given position. If called without
    arguments, returns the token under the cursor.

    Parameters: ~
      • {bufnr}  (number|nil) Buffer number (0 for current buffer, default)
      • {row}    (number|nil) Position row (default cursor position)
      • {col}    (number|nil) Position column (default cursor position)

    Return: ~
        (table|nil) List of tokens at position

start({bufnr}, {client_id}, {opts})          *vim.lsp.semantic_tokens.start()*
    Start the semantic token highlighting engine for the given buffer with the
    given client. The client must already be attached to the buffer.

    NOTE: This is currently called automatically by
    |vim.lsp.buf_attach_client()|. To opt-out of semantic highlighting with a
    server that supports it, you can delete the semanticTokensProvider table
    from the {server_capabilities} of your client in your |LspAttach| callback
    or your configuration's `on_attach` callback: >lua

       client.server_capabilities.semanticTokensProvider = nil
<

    Parameters: ~
      • {bufnr}      (number)
      • {client_id}  (number)
      • {opts}       (nil|table) Optional keyword arguments
                     • debounce (number, default: 200): Debounce token
                       requests to the server by the given number in
                       milliseconds

stop({bufnr}, {client_id})                    *vim.lsp.semantic_tokens.stop()*
    Stop the semantic token highlighting engine for the given buffer with the
    given client.

    NOTE: This is automatically called by a |LspDetach| autocmd that is set up
    as part of `start()`, so you should only need this function to manually
    disengage the semantic token engine without fully detaching the LSP client
    from the buffer.

    Parameters: ~
      • {bufnr}      (number)
      • {client_id}  (number)


==============================================================================
Lua module: vim.lsp.handlers                                    *lsp-handlers*

hover({_}, {result}, {ctx}, {config})               *vim.lsp.handlers.hover()*
    |lsp-handler| for the method "textDocument/hover" >lua

       vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(
         vim.lsp.handlers.hover, {
           -- Use a sharp border with `FloatBorder` highlights
           border = "single",
           -- add the title in hover float window
           title = "hover"
         }
       )
<

    Parameters: ~
      • {config}  (table) Configuration table.
                  • border: (default=nil)
                    • Add borders to the floating window
                    • See |nvim_open_win()|

                                           *vim.lsp.handlers.signature_help()*
signature_help({_}, {result}, {ctx}, {config})
    |lsp-handler| for the method "textDocument/signatureHelp". The active
    parameter is highlighted with |hl-LspSignatureActiveParameter|. >lua

       vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(
         vim.lsp.handlers.signature_help, {
           -- Use a sharp border with `FloatBorder` highlights
           border = "single"
         }
       )
<

    Parameters: ~
      • {config}  (table) Configuration table.
                  • border: (default=nil)
                    • Add borders to the floating window
                    • See |nvim_open_win()|


==============================================================================
Lua module: vim.lsp.util                                            *lsp-util*

                                     *vim.lsp.util.apply_text_document_edit()*
apply_text_document_edit({text_document_edit}, {index}, {offset_encoding})
    Applies a `TextDocumentEdit`, which is a list of changes to a single
    document.

    Parameters: ~
      • {text_document_edit}  (table) a `TextDocumentEdit` object
      • {index}               (number) Optional index of the edit, if from a
                              list of edits (or nil, if not from a list)

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentEdit

                                             *vim.lsp.util.apply_text_edits()*
apply_text_edits({text_edits}, {bufnr}, {offset_encoding})
    Applies a list of text edits to a buffer.

    Parameters: ~
      • {text_edits}       (table) list of `TextEdit` objects
      • {bufnr}            (number) Buffer id
      • {offset_encoding}  (string) utf-8|utf-16|utf-32

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textEdit

                                         *vim.lsp.util.apply_workspace_edit()*
apply_workspace_edit({workspace_edit}, {offset_encoding})
    Applies a `WorkspaceEdit`.

    Parameters: ~
      • {workspace_edit}   (table) `WorkspaceEdit`
      • {offset_encoding}  (string) utf-8|utf-16|utf-32 (required)

buf_clear_references({bufnr})            *vim.lsp.util.buf_clear_references()*
    Removes document highlights from a buffer.

    Parameters: ~
      • {bufnr}  (number) Buffer id

                                     *vim.lsp.util.buf_highlight_references()*
buf_highlight_references({bufnr}, {references}, {offset_encoding})
    Shows a list of document highlights for a certain buffer.

    Parameters: ~
      • {bufnr}            (number) Buffer id
      • {references}       (table) List of `DocumentHighlight` objects to
                           highlight
      • {offset_encoding}  (string) One of "utf-8", "utf-16", "utf-32".

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentContentChangeEvent

                                             *vim.lsp.util.character_offset()*
character_offset({buf}, {row}, {col}, {offset_encoding})
    Returns the UTF-32 and UTF-16 offsets for a position in a certain buffer.

    Parameters: ~
      • {buf}              (number) buffer number (0 for current)
      • {row}              0-indexed line
      • {col}              0-indexed byte offset in line
      • {offset_encoding}  (string) utf-8|utf-16|utf-32|nil defaults to
                           `offset_encoding` of first client of `buf`

    Return: ~
        (number, number) `offset_encoding` index of the character in line
        {row} column {col} in buffer {buf}

                              *vim.lsp.util.convert_input_to_markdown_lines()*
convert_input_to_markdown_lines({input}, {contents})
    Converts any of `MarkedString` | `MarkedString[]` | `MarkupContent` into a
    list of lines containing valid markdown. Useful to populate the hover
    window for `textDocument/hover`, for parsing the result of
    `textDocument/signatureHelp`, and potentially others.

    Parameters: ~
      • {input}     (`MarkedString` | `MarkedString[]` | `MarkupContent`)
      • {contents}  (table|nil) List of strings to extend with converted
                    lines. Defaults to {}.

    Return: ~
        {contents}, extended with lines of converted markdown.

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_hover

                     *vim.lsp.util.convert_signature_help_to_markdown_lines()*
convert_signature_help_to_markdown_lines({signature_help}, {ft}, {triggers})
    Converts `textDocument/SignatureHelp` response to markdown lines.

    Parameters: ~
      • {signature_help}  Response of `textDocument/SignatureHelp`
      • {ft}              optional filetype that will be use as the `lang` for
                          the label markdown code block
      • {triggers}        optional list of trigger characters from the lsp
                          server. used to better determine parameter offsets

    Return: ~
        (list) of lines of converted markdown.

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_signatureHelp

                                     *vim.lsp.util.extract_completion_items()*
extract_completion_items({result})
    Can be used to extract the completion items from a `textDocument/completion` request, which may return one of `CompletionItem[]` , `CompletionList` or null.

    Parameters: ~
      • {result}  (table) The result of a `textDocument/completion` request

    Return: ~
        (table) List of completion items

    See also: ~
        https://microsoft.github.io/language-server-protocol/specification#textDocument_completion

get_effective_tabstop({bufnr})          *vim.lsp.util.get_effective_tabstop()*
    Returns indentation size.

    Parameters: ~
      • {bufnr}  (number|nil) Buffer handle, defaults to current

    Return: ~
        (number) indentation size

    See also: ~
        'shiftwidth'

                                             *vim.lsp.util.jump_to_location()*
jump_to_location({location}, {offset_encoding}, {reuse_win})
    Jumps to a location.

    Parameters: ~
      • {location}         (table) (`Location`|`LocationLink`)
      • {offset_encoding}  "utf-8" | "utf-16" | "utf-32"
      • {reuse_win}        (boolean|nil) Jump to existing window if buffer is
                           already open.

    Return: ~
        (boolean) `true` if the jump succeeded

                                           *vim.lsp.util.locations_to_items()*
locations_to_items({locations}, {offset_encoding})
    Returns the items with the byte position calculated correctly and in
    sorted order, for display in quickfix and location lists.

    The result can be passed to the {list} argument of |setqflist()| or
    |setloclist()|.

    Parameters: ~
      • {locations}        (table) list of `Location`s or `LocationLink`s
      • {offset_encoding}  (string) offset_encoding for locations
                           utf-8|utf-16|utf-32

    Return: ~
        (table) list of items

lookup_section({settings}, {section})          *vim.lsp.util.lookup_section()*
    Helper function to return nested values in language server settings

    Parameters: ~
      • {settings}  a table of language server settings
      • {section}   a string indicating the field of the settings table

    Return: ~
        (table or string) The value of settings accessed via section

                                  *vim.lsp.util.make_floating_popup_options()*
make_floating_popup_options({width}, {height}, {opts})
    Creates a table with sensible default options for a floating window. The
    table can be passed to |nvim_open_win()|.

    Parameters: ~
      • {width}   (number) window width (in character cells)
      • {height}  (number) window height (in character cells)
      • {opts}    (table, optional)
                  • offset_x (number) offset to add to `col`
                  • offset_y (number) offset to add to `row`
                  • border (string or table) override `border`
                  • focusable (string or table) override `focusable`
                  • zindex (string or table) override `zindex`, defaults to 50
                  • relative ("mouse"|"cursor") defaults to "cursor"

    Return: ~
        (table) Options

                                       *vim.lsp.util.make_formatting_params()*
make_formatting_params({options})
    Creates a `DocumentFormattingParams` object for the current buffer and
    cursor position.

    Parameters: ~
      • {options}  (table|nil) with valid `FormattingOptions` entries

    Return: ~
        `DocumentFormattingParams` object

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_formatting

                                      *vim.lsp.util.make_given_range_params()*
make_given_range_params({start_pos}, {end_pos}, {bufnr}, {offset_encoding})
    Using the given range in the current buffer, creates an object that is
    similar to |vim.lsp.util.make_range_params()|.

    Parameters: ~
      • {start_pos}        number[]|nil {row, col} mark-indexed position.
                           Defaults to the start of the last visual selection.
      • {end_pos}          number[]|nil {row, col} mark-indexed position.
                           Defaults to the end of the last visual selection.
      • {bufnr}            (number|nil) buffer handle or 0 for current,
                           defaults to current
      • {offset_encoding}  "utf-8"|"utf-16"|"utf-32"|nil defaults to
                           `offset_encoding` of first client of `bufnr`

    Return: ~
        { textDocument = { uri = `current_file_uri` }, range = { start =
        `start_position`, end = `end_position` } }

                                         *vim.lsp.util.make_position_params()*
make_position_params({window}, {offset_encoding})
    Creates a `TextDocumentPositionParams` object for the current buffer and
    cursor position.

    Parameters: ~
      • {window}           (number|nil) window handle or 0 for current,
                           defaults to current
      • {offset_encoding}  (string|nil) utf-8|utf-16|utf-32|nil defaults to
                           `offset_encoding` of first client of buffer of
                           `window`

    Return: ~
        `TextDocumentPositionParams` object

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentPositionParams

                                            *vim.lsp.util.make_range_params()*
make_range_params({window}, {offset_encoding})
    Using the current position in the current buffer, creates an object that
    can be used as a building block for several LSP requests, such as
    `textDocument/codeAction`, `textDocument/colorPresentation`,
    `textDocument/rangeFormatting`.

    Parameters: ~
      • {window}           (number|nil) window handle or 0 for current,
                           defaults to current
      • {offset_encoding}  "utf-8"|"utf-16"|"utf-32"|nil defaults to
                           `offset_encoding` of first client of buffer of
                           `window`

    Return: ~
        { textDocument = { uri = `current_file_uri` }, range = { start =
        `current_position`, end = `current_position` } }

                                    *vim.lsp.util.make_text_document_params()*
make_text_document_params({bufnr})
    Creates a `TextDocumentIdentifier` object for the current buffer.

    Parameters: ~
      • {bufnr}  (number|nil) Buffer handle, defaults to current

    Return: ~
        `TextDocumentIdentifier`

    See also: ~
        https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentIdentifier

                                        *vim.lsp.util.make_workspace_params()*
make_workspace_params({added}, {removed})
    Create the workspace params

    Parameters: ~
      • {added}    
      • {removed}

                                        *vim.lsp.util.open_floating_preview()*
open_floating_preview({contents}, {syntax}, {opts})
    Shows contents in a floating window.

    Parameters: ~
      • {contents}  (table) of lines to show in window
      • {syntax}    (string) of syntax to set for opened buffer
      • {opts}      (table) with optional fields (additional keys are passed
                    on to |nvim_open_win()|)
                    • height: (number) height of floating window
                    • width: (number) width of floating window
                    • wrap: (boolean, default true) wrap long lines
                    • wrap_at: (number) character to wrap at for computing
                      height when wrap is enabled
                    • max_width: (number) maximal width of floating window
                    • max_height: (number) maximal height of floating window
                    • pad_top: (number) number of lines to pad contents at top
                    • pad_bottom: (number) number of lines to pad contents at
                      bottom
                    • focus_id: (string) if a popup with this id is opened,
                      then focus it
                    • close_events: (table) list of events that closes the
                      floating window
                    • focusable: (boolean, default true) Make float focusable
                    • focus: (boolean, default true) If `true`, and if
                      {focusable} is also `true`, focus an existing floating
                      window with the same {focus_id}

    Return: ~
        bufnr,winnr buffer and window number of the newly created floating
        preview window

parse_snippet({input})                          *vim.lsp.util.parse_snippet()*
    Parses snippets in a completion entry.

    Parameters: ~
      • {input}  (string) unparsed snippet

    Return: ~
        (string) parsed snippet

preview_location({location}, {opts})         *vim.lsp.util.preview_location()*
    Previews a location in a floating window

    behavior depends on type of location:
    • for Location, range is shown (e.g., function definition)
    • for LocationLink, targetRange is shown (e.g., body of function
      definition)

    Parameters: ~
      • {location}  a single `Location` or `LocationLink`

    Return: ~
        (bufnr,winnr) buffer and window number of floating window or nil

rename({old_fname}, {new_fname}, {opts})               *vim.lsp.util.rename()*
    Rename old_fname to new_fname

    Parameters: ~
      • {opts}  (table)

set_lines({lines}, {A}, {B}, {new_lines})           *vim.lsp.util.set_lines()*
    Replaces text in a range with new text.

    CAUTION: Changes in-place!

    Parameters: ~
      • {lines}      (table) Original list of strings
      • {A}          (table) Start position; a 2-tuple of {line, col} numbers
      • {B}          (table) End position; a 2-tuple of {line, col} numbers
      • {new_lines}  A list of strings to replace the original

    Return: ~
        (table) The modified {lines} object

                                                *vim.lsp.util.show_document()*
show_document({location}, {offset_encoding}, {opts})
    Shows document and optionally jumps to the location.

    Parameters: ~
      • {location}         (table) (`Location`|`LocationLink`)
      • {offset_encoding}  "utf-8" | "utf-16" | "utf-32"
      • {opts}             (table|nil) options
                           • reuse_win (boolean) Jump to existing window if
                             buffer is already open.
                           • focus (boolean) Whether to focus/jump to location
                             if possible. Defaults to true.

    Return: ~
        (boolean) `true` if succeeded

                                             *vim.lsp.util.stylize_markdown()*
stylize_markdown({bufnr}, {contents}, {opts})
    Converts markdown into syntax highlighted regions by stripping the code
    blocks and converting them into highlighted code. This will by default
    insert a blank line separator after those code block regions to improve
    readability.

    This method configures the given buffer and returns the lines to set.

    If you want to open a popup with fancy markdown, use
    `open_floating_preview` instead

    Parameters: ~
      • {contents}  (table) of lines to show in window
      • {opts}      dictionary with optional fields
                    • height of floating window
                    • width of floating window
                    • wrap_at character to wrap at for computing height
                    • max_width maximal width of floating window
                    • max_height maximal height of floating window
                    • pad_top number of lines to pad contents at top
                    • pad_bottom number of lines to pad contents at bottom
                    • separator insert separator after code block

    Return: ~
        width,height size of float

symbols_to_items({symbols}, {bufnr})         *vim.lsp.util.symbols_to_items()*
    Converts symbols to quickfix list items.

    Parameters: ~
      • {symbols}  DocumentSymbol[] or SymbolInformation[]

              *vim.lsp.util.text_document_completion_list_to_complete_items()*
text_document_completion_list_to_complete_items({result}, {prefix})
    Turns the result of a `textDocument/completion` request into
    vim-compatible |complete-items|.

    Parameters: ~
      • {result}  The result of a `textDocument/completion` call, e.g. from
                  |vim.lsp.buf.completion()|, which may be one of
                  `CompletionItem[]`, `CompletionList` or `null`
      • {prefix}  (string) the prefix to filter the completion items

    Return: ~
        { matches = complete-items table, incomplete = bool }

    See also: ~
        |complete-items|

trim_empty_lines({lines})                    *vim.lsp.util.trim_empty_lines()*
    Removes empty lines from the beginning and end.

    Parameters: ~
      • {lines}  (table) list of lines to trim

    Return: ~
        (table) trimmed list of lines

                                *vim.lsp.util.try_trim_markdown_code_blocks()*
try_trim_markdown_code_blocks({lines})
    Accepts markdown lines and tries to reduce them to a filetype if they
    comprise just a single code block.

    CAUTION: Modifies the input in-place!

    Parameters: ~
      • {lines}  (table) list of lines

    Return: ~
        (string) filetype or "markdown" if it was unchanged.


==============================================================================
Lua module: vim.lsp.log                                              *lsp-log*

get_filename()                                    *vim.lsp.log.get_filename()*
    Returns the log filename.

    Return: ~
        (string) log filename

get_level()                                          *vim.lsp.log.get_level()*
    Gets the current log level.

    Return: ~
        (string) current log level

set_format_func({handle})                      *vim.lsp.log.set_format_func()*
    Sets formatting function used to format logs

    Parameters: ~
      • {handle}  (function) function to apply to logging arguments, pass
                  vim.inspect for multi-line formatting

set_level({level})                                   *vim.lsp.log.set_level()*
    Sets the current log level.

    Parameters: ~
      • {level}  (string|number) One of `vim.lsp.log.levels`

should_log({level})                                 *vim.lsp.log.should_log()*
    Checks whether the level is sufficient for logging.

    Parameters: ~
      • {level}  (number) log level

    Return: ~
        (bool) true if would log, false if not


==============================================================================
Lua module: vim.lsp.rpc                                              *lsp-rpc*

connect({host}, {port})                                *vim.lsp.rpc.connect()*
    Create a LSP RPC client factory that connects via TCP to the given host
    and port

    Parameters: ~
      • {host}  (string)
      • {port}  (number)

    Return: ~
        (function)

format_rpc_error({err})                       *vim.lsp.rpc.format_rpc_error()*
    Constructs an error message from an LSP error object.

    Parameters: ~
      • {err}  (table) The error object

    Return: ~
        (string) The formatted error message

notify({method}, {params})                              *vim.lsp.rpc.notify()*
    Sends a notification to the LSP server.

    Parameters: ~
      • {method}  (string) The invoked LSP method
      • {params}  (table|nil) Parameters for the invoked LSP method

    Return: ~
        (bool) `true` if notification could be sent, `false` if not

                                                       *vim.lsp.rpc.request()*
request({method}, {params}, {callback}, {notify_reply_callback})
    Sends a request to the LSP server and runs {callback} upon response.

    Parameters: ~
      • {method}                 (string) The invoked LSP method
      • {params}                 (table|nil) Parameters for the invoked LSP
                                 method
      • {callback}               fun(err: lsp.ResponseError | nil, result: any) Callback to invoke
      • {notify_reply_callback}  (function|nil) Callback to invoke as soon as
                                 a request is no longer pending

    Return: ~
        (boolean) success, integer|nil request_id true, message_id if request
        could be sent, `false` if not

                                            *vim.lsp.rpc.rpc_response_error()*
rpc_response_error({code}, {message}, {data})
    Creates an RPC response object/table.

    Parameters: ~
      • {code}     (number) RPC error code defined in
                   `vim.lsp.protocol.ErrorCodes`
      • {message}  (string|nil) arbitrary message to send to server
      • {data}     any|nil arbitrary data to send to server

                                                         *vim.lsp.rpc.start()*
start({cmd}, {cmd_args}, {dispatchers}, {extra_spawn_params})
    Starts an LSP server process and create an LSP RPC client object to
    interact with it. Communication with the spawned process happens via
    stdio. For communication via TCP, spawn a process manually and use
    |vim.lsp.rpc.connect()|

    Parameters: ~
      • {cmd}                 (string) Command to start the LSP server.
      • {cmd_args}            (table) List of additional string arguments to
                              pass to {cmd}.
      • {dispatchers}         (table|nil) Dispatchers for LSP message types.
                              Valid dispatcher names are:
                              • `"notification"`
                              • `"server_request"`
                              • `"on_error"`
                              • `"on_exit"`
      • {extra_spawn_params}  (table|nil) Additional context for the LSP
                              server process. May contain:
                              • {cwd} (string) Working directory for the LSP
                                server process
                              • {env} (table) Additional environment variables
                                for LSP server process

    Return: ~
        Client RPC object.
        Methods:
        • `notify()` |vim.lsp.rpc.notify()|
        • `request()` |vim.lsp.rpc.request()|
        • `is_closing()` returns a boolean indicating if the RPC is closing.
        • `terminate()` terminates the RPC client.


==============================================================================
Lua module: vim.lsp.sync                                            *lsp-sync*

                                                 *vim.lsp.sync.compute_diff()*
compute_diff({___MissingCloseParenHere___})
    Returns the range table for the difference between prev and curr lines

    Parameters: ~
      • {prev_lines}       (table) list of lines
      • {curr_lines}       (table) list of lines
      • {firstline}        (number) line to begin search for first difference
      • {lastline}         (number) line to begin search in old_lines for last
                           difference
      • {new_lastline}     (number) line to begin search in new_lines for last
                           difference
      • {offset_encoding}  (string) encoding requested by language server

    Return: ~
        (table) TextDocumentContentChangeEvent see https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentContentChangeEvent


==============================================================================
Lua module: vim.lsp.protocol                                    *lsp-protocol*

                                 *vim.lsp.protocol.make_client_capabilities()*
make_client_capabilities()
    Gets a new ClientCapabilities object describing the LSP client
    capabilities.

                                     *vim.lsp.protocol.resolve_capabilities()*
resolve_capabilities({server_capabilities})
    Creates a normalized object describing LSP server capabilities.

    Parameters: ~
      • {server_capabilities}  (table) Table of capabilities supported by the
                               server

    Return: ~
        (table) Normalized table of capabilities

 vim:tw=78:ts=8:sw=4:sts=4:et:ft=help:norl:
