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*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 the nvim-lspconfig plugin. It provides common configuration for
various servers so you can get started quickly.
https://github.com/neovim/nvim-lspconfig
2. Install a language server. A list of language servers can be found here:
https://microsoft.github.io/language-server-protocol/implementors/servers/
See individual server documentation for installation instructions.
3. Add `lua require('lspconfig').xx.setup{…}` to your init.vim, where "xx" is
the name of the relevant config. See the nvim-lspconfig README for details.
NOTE: Make sure to restart nvim after installing and configuring.
4. Check that an LSP client has attached to the current buffer: >
:lua print(vim.inspect(vim.lsp.buf_get_clients()))
<
*lsp-config*
Inline diagnostics are enabled automatically, e.g. syntax errors will be
annotated in the buffer. But you probably also want to use other features
like go-to-definition, hover, etc.
While Nvim does not provide an "auto-completion" framework by default, it is
still possible to get completions from the LSP server. To incorporate these
completions, it is recommended to use |vim.lsp.omnifunc|, which is an 'omnifunc'
handler. When 'omnifunc' is set to `v:lua.vim.lsp.omnifunc`, |i_CTRL-X_CTRL-O|
will provide completions from the language server.
Example config (in init.vim): >
lua << EOF
local custom_lsp_attach = function(client)
-- See `:help nvim_buf_set_keymap()` for more information
vim.api.nvim_buf_set_keymap(0, 'n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', {noremap = true})
vim.api.nvim_buf_set_keymap(0, 'n', '<c-]>', '<cmd>lua vim.lsp.buf.definition()<CR>', {noremap = true})
-- ... and other keymappings for LSP
-- Use LSP as the handler for omnifunc.
-- See `:help omnifunc` and `:help ins-completion` for more information.
vim.api.nvim_buf_set_option(0, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
-- For plugins with an `on_attach` callback, call them here. For example:
-- require('completion').on_attach()
end
-- An example of configuring for `sumneko_lua`,
-- a language server for Lua.
-- set the path to the sumneko installation
local system_name = "Linux" -- (Linux, macOS, or Windows)
local sumneko_root_path = '/path/to/lua-language-server'
local sumneko_binary = sumneko_root_path.."/bin/"..system_name.."/lua-language-server"
require('lspconfig').sumneko_lua.setup({
cmd = {sumneko_binary, "-E", sumneko_root_path .. "/main.lua"};
-- An example of settings for an LSP server.
-- For more options, see nvim-lspconfig
settings = {
Lua = {
runtime = {
-- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
version = 'LuaJIT',
-- Setup your lua path
path = vim.split(package.path, ';'),
},
diagnostics = {
-- Get the language server to recognize the `vim` global
globals = {'vim'},
},
workspace = {
-- Make the server aware of Neovim runtime files
library = {
[vim.fn.expand('$VIMRUNTIME/lua')] = true,
[vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true,
},
},
}
},
on_attach = custom_lsp_attach
})
EOF
<
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. >
: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": >
: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: Use the `_sync` variant of the function provided by |lsp-buf|, if it
exists.
E.g. code formatting: >
" Auto-format *.rs (rust) files prior to saving them
autocmd BufWritePre *.rs lua vim.lsp.buf.formatting_sync(nil, 1000)
<
*vim.lsp.callbacks*
- Q: What happened to `vim.lsp.callbacks`?
A: After better defining the interface of |lsp-handler|s, we thought it best
to remove the generic usage of `callbacks` and transform to `handlers`.
Due to this, `vim.lsp.callbacks` was renamed to |vim.lsp.handlers|.
*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: >
: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/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, method, result, client_id, bufnr, 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|.
{method} (string)
The |lsp-method| name.
{result} (Result | Params | nil)
When the language server is able to succesfully
complete a request, this contains the `result` key
of the response. See |lsp-response|.
{client_id} (number)
The ID of the |vim.lsp.client|.
{bufnr} (Buffer)
Buffer handle, or 0 for current.
{config} (table)
Configuration for the handler.
Each handler can define it's 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_response_error()| to create this object.
For |lsp-notification|, each |lsp-handler| has this signature: >
function(err, method, params, client_id, bufnr, config)
<
Parameters: ~
{err} (nil)
This is always `nil`.
See |lsp-notification|
{method} (string)
The |lsp-method| name.
{params} (Params)
This contains the `params` key of the notification.
See |lsp-notification|
{client_id} (number)
The ID of the |vim.lsp.client|
{bufnr} (nil)
`nil`, as the server doesn't have an associated buffer.
{config} (table)
Configuration for the handler.
Each handler can define it's 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: >
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: >
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()| >
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()`: >
require('lspconfig').rust_analyzer.setup {
handlers = {
["textDocument/publishDiagnostics"] = vim.lsp.with(
vim.lsp.diagnostic.on_publish_diagnostics, {
-- Disable virtual_text
virtual_text = false
}
),
}
}
<
*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: >
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: >
vim.lsp.start_client {
..., -- Other configuration ommitted.
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: >
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.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: >
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 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-diagnostics*
All highlights defined for diagnostics begin with `LspDiagnostics` followed by
the type of highlight (e.g., `Sign`, `Underline`, etc.) and then the Severity
of the highlight (e.g. `Error`, `Warning`, etc.)
Sign, underline and virtual text highlights (by default) are linked to their
corresponding LspDiagnosticsDefault highlight.
For example, the default highlighting for |hl-LspDiagnosticsSignError| is
linked to |hl-LspDiagnosticsDefaultError|. To change the default (and
therefore the linked highlights), use the |:highlight| command: >
highlight LspDiagnosticsDefaultError guifg="BrightRed"
<
*hl-LspDiagnosticsDefaultError*
LspDiagnosticsDefaultError
Used as the base highlight group.
Other LspDiagnostic highlights link to this by default (except Underline)
*hl-LspDiagnosticsDefaultWarning*
LspDiagnosticsDefaultWarning
Used as the base highlight group.
Other LspDiagnostic highlights link to this by default (except Underline)
*hl-LspDiagnosticsDefaultInformation*
LspDiagnosticsDefaultInformation
Used as the base highlight group.
Other LspDiagnostic highlights link to this by default (except Underline)
*hl-LspDiagnosticsDefaultHint*
LspDiagnosticsDefaultHint
Used as the base highlight group.
Other LspDiagnostic highlights link to this by default (except Underline)
*hl-LspDiagnosticsVirtualTextError*
LspDiagnosticsVirtualTextError
Used for "Error" diagnostic virtual text.
See |vim.lsp.diagnostic.set_virtual_text()|
*hl-LspDiagnosticsVirtualTextWarning*
LspDiagnosticsVirtualTextWarning
Used for "Warning" diagnostic virtual text.
See |vim.lsp.diagnostic.set_virtual_text()|
*hl-LspDiagnosticsVirtualTextInformation*
LspDiagnosticsVirtualTextInformation
Used for "Information" diagnostic virtual text.
See |vim.lsp.diagnostic.set_virtual_text()|
*hl-LspDiagnosticsVirtualTextHint*
LspDiagnosticsVirtualTextHint
Used for "Hint" diagnostic virtual text.
See |vim.lsp.diagnostic.set_virtual_text()|
*hl-LspDiagnosticsUnderlineError*
LspDiagnosticsUnderlineError
Used to underline "Error" diagnostics.
See |vim.lsp.diagnostic.set_underline()|
*hl-LspDiagnosticsUnderlineWarning*
LspDiagnosticsUnderlineWarning
Used to underline "Warning" diagnostics.
See |vim.lsp.diagnostic.set_underline()|
*hl-LspDiagnosticsUnderlineInformation*
LspDiagnosticsUnderlineInformation
Used to underline "Information" diagnostics.
See |vim.lsp.diagnostic.set_underline()|
*hl-LspDiagnosticsUnderlineHint*
LspDiagnosticsUnderlineHint
Used to underline "Hint" diagnostics.
See |vim.lsp.diagnostic.set_underline()|
*hl-LspDiagnosticsFloatingError*
LspDiagnosticsFloatingError
Used to color "Error" diagnostic messages in diagnostics float.
See |vim.lsp.diagnostic.show_line_diagnostics()|
*hl-LspDiagnosticsFloatingWarning*
LspDiagnosticsFloatingWarning
Used to color "Warning" diagnostic messages in diagnostics float.
See |vim.lsp.diagnostic.show_line_diagnostics()|
*hl-LspDiagnosticsFloatingInformation*
LspDiagnosticsFloatingInformation
Used to color "Information" diagnostic messages in diagnostics float.
See |vim.lsp.diagnostic.show_line_diagnostics()|
*hl-LspDiagnosticsFloatingHint*
LspDiagnosticsFloatingHint
Used to color "Hint" diagnostic messages in diagnostics float.
See |vim.lsp.diagnostic.show_line_diagnostics()|
*hl-LspDiagnosticsSignError*
LspDiagnosticsSignError
Used for "Error" signs in sign column.
See |vim.lsp.diagnostic.set_signs()|
*hl-LspDiagnosticsSignWarning*
LspDiagnosticsSignWarning
Used for "Warning" signs in sign column.
See |vim.lsp.diagnostic.set_signs()|
*hl-LspDiagnosticsSignInformation*
LspDiagnosticsSignInformation
Used for "Information" signs in sign column.
See |vim.lsp.diagnostic.set_signs()|
*hl-LspDiagnosticsSignHint*
LspDiagnosticsSignHint
Used for "Hint" signs in sign column.
See |vim.lsp.diagnostic.set_signs()|
==============================================================================
AUTOCOMMANDS *lsp-autocommands*
*LspDiagnosticsChanged*
LspDiagnosticsChanged After receiving publishDiagnostics server response
==============================================================================
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_get_clients({bufnr}) *vim.lsp.buf_get_clients()*
Gets a map of client_id:client pairs for the given buffer,
where each value is a |vim.lsp.client| object.
Parameters: ~
{bufnr} (optional, number): Buffer handle, or 0 for
current
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] (optional): The number of the buffer
{method} [string]: Name of the request method
{params} [string]: Arguments to send to the server
Return: ~
true if any client returns true; false otherwise
*vim.lsp.buf_request()*
buf_request({bufnr}, {method}, {params}, {handler})
Sends an async request for all active clients attached to the
buffer.
Parameters: ~
{bufnr} (number) Buffer handle, or 0 for current.
{method} (string) LSP method name
{params} (optional, table) Parameters to send to the
server
{handler} (optional, function) See |lsp-handler|
Return: ~
2-tuple:
• Map of client-id:request-id pairs for all successful
requests.
• Function which can be used to cancel all the requests.
You could instead iterate all clients and call their
`cancel_request()` methods.
*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} (optional, table) Parameters to send to the
server
{callback} (function) The callback to call when all
requests are finished.
Return: ~
(function) A function that will cancel all requests which
is the same as the one returned from `buf_request` .
*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 100) ms.
Parameters: ~
{bufnr} (number) Buffer handle, or 0 for current.
{method} (string) LSP method name
{params} (optional, table) Parameters to send to the
server
{timeout_ms} (optional, number, default=100) Maximum time
in milliseconds to wait for a result.
Return: ~
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.
• 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|.
• {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.
• {resolved_capabilities} (table): Normalized table of
capabilities that we have detected based on the initialize
response from the server in `server_capabilities` .
client_is_stopped({client_id}) *vim.lsp.client_is_stopped()*
Checks whether a client is stopped.
Parameters: ~
{client_id} (Number)
Return: ~
true if client is stopped, false otherwise.
flush({client}) *vim.lsp.flush()*
TODO: Documentation
get_active_clients() *vim.lsp.get_active_clients()*
Gets all active clients.
Return: ~
Table of |vim.lsp.client| objects
*vim.lsp.get_buffers_by_client_id()*
get_buffers_by_client_id({client_id})
Parameters: ~
{client_id} client id
Return: ~
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} client id number
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 logfile.
init({client}, {bufnr}) *vim.lsp.init()*
client_id → state
state pending_change?: function that the timer starts to
trigger didChange pending_changes: list of tables with the
pending changesets; for incremental_sync only
use_incremental_sync: bool buffers?: table (bufnr → lines);
for incremental sync only timer?: uv_timer
omnifunc({findstart}, {base}) *vim.lsp.omnifunc()*
Implements 'omnifunc' compatible LSP completion.
Parameters: ~
{findstart} 0 or 1, decides behavior
{base} If 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|
*vim.lsp.prepare()*
prepare({bufnr}, {firstline}, {new_lastline}, {changedtick})
TODO: Documentation
reset({client_id}) *vim.lsp.reset()*
TODO: Documentation
reset_buf({client}, {bufnr}) *vim.lsp.reset_buf()*
TODO: Documentation
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"
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_client({config}) *vim.lsp.start_client()*
Starts and initializes a client with the given configuration.
Parameters `cmd` and `root_dir` are required.
The following parameters describe fields in the {config}
table.
Parameters: ~
{root_dir} (required, string) Directory where the
LSP server will base its rootUri on
initialization.
{cmd} (required, string or list treated like
|jobstart()|) Base command that
initiates the LSP client.
{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"; }
<
{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.
{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.client_errors| for
possible errors. Use
`vim.lsp.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 nil): Debounce didChange
notifications to the server by the
given number in milliseconds. No
debounce occurs if nil
Return: ~
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:
>
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} client id or |vim.lsp.client| object, or list
thereof
{force} boolean (optional) shutdown forcefully
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({context}) *vim.lsp.buf.code_action()*
Selects a code action from the input list that is available at
the current cursor position.
Parameters: ~
{context} (table, optional) Valid `CodeActionContext`
object
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_codeAction
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() *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.
definition() *vim.lsp.buf.definition()*
Jumps to the definition of the symbol under the cursor.
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` ,
eg:
>
vim.api.nvim_command [[autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()]]
vim.api.nvim_command [[autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight()]]
vim.api.nvim_command [[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. |LspReferenceText|
|LspReferenceRead| |LspReferenceWrite|
document_symbol() *vim.lsp.buf.document_symbol()*
Lists all symbols in the current buffer in the quickfix
window.
execute_command({command}) *vim.lsp.buf.execute_command()*
Executes an LSP server command.
Parameters: ~
{command} A valid `ExecuteCommandParams` object
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#workspace_executeCommand
formatting({options}) *vim.lsp.buf.formatting()*
Formats the current buffer.
Parameters: ~
{options} (optional, table) Can be used to specify
FormattingOptions. Some unspecified options
will be automatically derived from the current
Neovim options.
See also: ~
https://microsoft.github.io/language-server-protocol/specification#textDocument_formatting
*vim.lsp.buf.formatting_sync()*
formatting_sync({options}, {timeout_ms})
Performs |vim.lsp.buf.formatting()| synchronously.
Useful for running on save, to make sure buffer is formatted
prior to being saved. {timeout_ms} is passed on to
|vim.lsp.buf_request_sync()|. Example:
>
vim.api.nvim_command[[autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_sync()]]
<
Parameters: ~
{options} Table with valid `FormattingOptions` entries
{timeout_ms} (number) Request timeout
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() *vim.lsp.buf.implementation()*
Lists all the implementations for the symbol under the cursor
in the quickfix window.
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|.
*vim.lsp.buf.range_code_action()*
range_code_action({context}, {start_pos}, {end_pos})
Performs |vim.lsp.buf.code_action()| for a given range.
Parameters: ~
{context} (table, optional) Valid `CodeActionContext`
object
{start_pos} ({number, number}, optional) mark-indexed
position. Defaults to the start of the last
visual selection.
{end_pos} ({number, number}, optional) mark-indexed
position. Defaults to the end of the last
visual selection.
*vim.lsp.buf.range_formatting()*
range_formatting({options}, {start_pos}, {end_pos})
Formats a given range.
Parameters: ~
{options} Table with valid `FormattingOptions` entries.
{start_pos} ({number, number}, optional) mark-indexed
position. Defaults to the start of the last
visual selection.
{end_pos} ({number, number}, optional) mark-indexed
position. Defaults to the end of the last
visual selection.
references({context}) *vim.lsp.buf.references()*
Lists all the references to the symbol under the cursor in the
quickfix window.
Parameters: ~
{context} (table) Context for the request
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}) *vim.lsp.buf.rename()*
Renames all references to the symbol under the cursor.
Parameters: ~
{new_name} (string) If not provided, the user will be
prompted for a new name using |input()|.
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() *vim.lsp.buf.type_definition()*
Jumps to the definition of the type of the symbol under the
cursor.
workspace_symbol({query}) *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)
==============================================================================
Lua module: vim.lsp.diagnostic *lsp-diagnostic*
*vim.lsp.diagnostic.clear()*
clear({bufnr}, {client_id}, {diagnostic_ns}, {sign_ns})
Clears the currently displayed diagnostics
Parameters: ~
{bufnr} number The buffer number
{client_id} number the client id
{diagnostic_ns} number|nil Associated diagnostic
namespace
{sign_ns} number|nil Associated sign namespace
get({bufnr}, {client_id}) *vim.lsp.diagnostic.get()*
Return associated diagnostics for bufnr
Parameters: ~
{bufnr} number
{client_id} number|nil If nil, then return all of the
diagnostics. Else, return just the
diagnostics associated with the client_id.
get_all() *vim.lsp.diagnostic.get_all()*
Get all diagnostics for all clients
Return: ~
{bufnr:Diagnostic[]}
*vim.lsp.diagnostic.get_count()*
get_count({bufnr}, {severity}, {client_id})
Get the counts for a particular severity
Useful for showing diagnostic counts in statusline. eg:
>
function! LspStatus() abort
let sl = ''
if luaeval('not vim.tbl_isempty(vim.lsp.buf_get_clients(0))')
let sl.='%#MyStatuslineLSP#E:'
let sl.='%#MyStatuslineLSPErrors#%{luaeval("vim.lsp.diagnostic.get_count(0, [[Error]])")}'
let sl.='%#MyStatuslineLSP# W:'
let sl.='%#MyStatuslineLSPWarnings#%{luaeval("vim.lsp.diagnostic.get_count(0, [[Warning]])")}'
else
let sl.='%#MyStatuslineLSPErrors#off'
endif
return sl
endfunction
let &l:statusline = '%#MyStatuslineLSP#LSP '.LspStatus()
<
Parameters: ~
{bufnr} number The buffer number
{severity} DiagnosticSeverity
{client_id} number the client id
*vim.lsp.diagnostic.get_line_diagnostics()*
get_line_diagnostics({bufnr}, {line_nr}, {opts}, {client_id})
Get the diagnostics by line
Parameters: ~
{bufnr} number The buffer number
{line_nr} number The line number
{opts} table|nil Configuration keys
• severity: (DiagnosticSeverity, default nil)
• Only return diagnostics with this
severity. Overrides severity_limit
• severity_limit: (DiagnosticSeverity, default nil)
• Limit severity of diagnostics found. E.g.
"Warning" means { "Error", "Warning" }
will be valid.
{client_id} number the client id
Return: ~
table Table with map of line number to list of
diagnostics.
get_next({opts}) *vim.lsp.diagnostic.get_next()*
Get the next diagnostic closest to the cursor_position
Parameters: ~
{opts} table See |vim.lsp.diagnostic.goto_next()|
Return: ~
table Next diagnostic
get_next_pos({opts}) *vim.lsp.diagnostic.get_next_pos()*
Return the pos, {row, col}, for the next diagnostic in the
current buffer.
Parameters: ~
{opts} table See |vim.lsp.diagnostic.goto_next()|
Return: ~
table Next diagnostic position
get_prev({opts}) *vim.lsp.diagnostic.get_prev()*
Get the previous diagnostic closest to the cursor_position
Parameters: ~
{opts} table See |vim.lsp.diagnostic.goto_next()|
Return: ~
table Previous diagnostic
get_prev_pos({opts}) *vim.lsp.diagnostic.get_prev_pos()*
Return the pos, {row, col}, for the prev diagnostic in the
current buffer.
Parameters: ~
{opts} table See |vim.lsp.diagnostic.goto_next()|
Return: ~
table Previous diagnostic position
*vim.lsp.diagnostic.get_virtual_text_chunks_for_line()*
get_virtual_text_chunks_for_line({bufnr}, {line}, {line_diags}, {opts})
Default function to get text chunks to display using `nvim_buf_set_virtual_text` .
Parameters: ~
{bufnr} number The buffer to display the virtual
text in
{line} number The line number to display the
virtual text on
{line_diags} Diagnostic [] The diagnostics associated with the line
{opts} table See {opts} from
|vim.lsp.diagnostic.set_virtual_text()|
Return: ~
table chunks, as defined by |nvim_buf_set_virtual_text()|
goto_next({opts}) *vim.lsp.diagnostic.goto_next()*
Move to the next diagnostic
Parameters: ~
{opts} table|nil Configuration table. Keys:
• {client_id}: (number)
• If nil, will consider all clients attached to
buffer.
• {cursor_position}: (Position, default current
position)
• See |nvim_win_get_cursor()|
• {wrap}: (boolean, default true)
• Whether to loop around file or not. Similar to
'wrapscan'
• {severity}: (DiagnosticSeverity)
• Exclusive severity to consider. Overrides
{severity_limit}
• {severity_limit}: (DiagnosticSeverity)
• Limit severity of diagnostics found. E.g.
"Warning" means { "Error", "Warning" } will be
valid.
• {enable_popup}: (boolean, default true)
• Call
|vim.lsp.diagnostic.show_line_diagnostics()|
on jump
• {popup_opts}: (table)
• Table to pass as {opts} parameter to
|vim.lsp.diagnostic.show_line_diagnostics()|
• {win_id}: (number, default 0)
• Window ID
goto_prev({opts}) *vim.lsp.diagnostic.goto_prev()*
Move to the previous diagnostic
Parameters: ~
{opts} table See |vim.lsp.diagnostic.goto_next()|
*vim.lsp.diagnostic.on_publish_diagnostics()*
on_publish_diagnostics({_}, {_}, {params}, {client_id}, {_}, {config})
|lsp-handler| for the method "textDocument/publishDiagnostics"
Note:
Each of the configuration options accepts:
• `false` : Disable this feature
• `true` : Enable this feature, use default settings.
• `table` : Enable this feature, use overrides.
• `function`: Function with signature (bufnr, client_id) that
returns any of the above.>
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(bufnr, client_id)
return vim.bo[bufnr].show_signs == false
end,
-- Disable a feature
update_in_insert = false,
}
)
<
Parameters: ~
{config} table Configuration table.
• underline: (default=true)
• Apply underlines to diagnostics.
• See |vim.lsp.diagnostic.set_underline()|
• virtual_text: (default=true)
• Apply virtual text to line endings.
• See |vim.lsp.diagnostic.set_virtual_text()|
• signs: (default=true)
• Apply signs for diagnostics.
• See |vim.lsp.diagnostic.set_signs()|
• update_in_insert: (default=false)
• Update diagnostics in InsertMode or wait
until InsertLeave
• severity_sort: (default=false)
• Sort diagnostics (and thus signs and virtual
text)
reset({client_id}, {buffer_client_map}) *vim.lsp.diagnostic.reset()*
Clear diagnotics and diagnostic cache
Handles saving diagnostics from multiple clients in the same
buffer.
Parameters: ~
{client_id} number
{buffer_client_map} table map of buffers to active
clients
save({diagnostics}, {bufnr}, {client_id}) *vim.lsp.diagnostic.save()*
Save diagnostics to the current buffer.
Handles saving diagnostics from multiple clients in the same
buffer.
Parameters: ~
{diagnostics} Diagnostic []
{bufnr} number
{client_id} number
set_loclist({opts}) *vim.lsp.diagnostic.set_loclist()*
Sets the location list
Parameters: ~
{opts} table|nil Configuration table. Keys:
• {open_loclist}: (boolean, default true)
• Open loclist after set
• {client_id}: (number)
• If nil, will consider all clients attached to
buffer.
• {severity}: (DiagnosticSeverity)
• Exclusive severity to consider. Overrides
{severity_limit}
• {severity_limit}: (DiagnosticSeverity)
• Limit severity of diagnostics found. E.g.
"Warning" means { "Error", "Warning" } will be
valid.
*vim.lsp.diagnostic.set_signs()*
set_signs({diagnostics}, {bufnr}, {client_id}, {sign_ns}, {opts})
Set signs for given diagnostics
Sign characters can be customized with the following commands:
>
sign define LspDiagnosticsSignError text=E texthl=LspDiagnosticsSignError linehl= numhl=
sign define LspDiagnosticsSignWarning text=W texthl=LspDiagnosticsSignWarning linehl= numhl=
sign define LspDiagnosticsSignInformation text=I texthl=LspDiagnosticsSignInformation linehl= numhl=
sign define LspDiagnosticsSignHint text=H texthl=LspDiagnosticsSignHint linehl= numhl=
<
Parameters: ~
{diagnostics} Diagnostic []
{bufnr} number The buffer number
{client_id} number the client id
{sign_ns} number|nil
{opts} table Configuration for signs. Keys:
• priority: Set the priority of the signs.
• severity_limit (DiagnosticSeverity):
• Limit severity of diagnostics found.
E.g. "Warning" means { "Error",
"Warning" } will be valid.
*vim.lsp.diagnostic.set_underline()*
set_underline({diagnostics}, {bufnr}, {client_id}, {diagnostic_ns}, {opts})
Set underline for given diagnostics
Underline highlights can be customized by changing the
following |:highlight| groups.
>
LspDiagnosticsUnderlineError
LspDiagnosticsUnderlineWarning
LspDiagnosticsUnderlineInformation
LspDiagnosticsUnderlineHint
<
Parameters: ~
{diagnostics} Diagnostic []
{bufnr} number: The buffer number
{client_id} number: The client id
{diagnostic_ns} number|nil: The namespace
{opts} table: Configuration table:
• severity_limit (DiagnosticSeverity):
• Limit severity of diagnostics found.
E.g. "Warning" means { "Error",
"Warning" } will be valid.
*vim.lsp.diagnostic.set_virtual_text()*
set_virtual_text({diagnostics}, {bufnr}, {client_id}, {diagnostic_ns}, {opts})
Set virtual text given diagnostics
Virtual text highlights can be customized by changing the
following |:highlight| groups.
>
LspDiagnosticsVirtualTextError
LspDiagnosticsVirtualTextWarning
LspDiagnosticsVirtualTextInformation
LspDiagnosticsVirtualTextHint
<
Parameters: ~
{diagnostics} Diagnostic []
{bufnr} number
{client_id} number
{diagnostic_ns} number
{opts} table Options on how to display virtual
text. Keys:
• prefix (string): Prefix to display
before virtual text on line
• spacing (number): Number of spaces to
insert before virtual text
• severity_limit (DiagnosticSeverity):
• Limit severity of diagnostics found.
E.g. "Warning" means { "Error",
"Warning" } will be valid.
*vim.lsp.diagnostic.show_line_diagnostics()*
show_line_diagnostics({opts}, {bufnr}, {line_nr}, {client_id})
Open a floating window with the diagnostics from {line_nr}
The floating window can be customized with the following
highlight groups: >
LspDiagnosticsFloatingError
LspDiagnosticsFloatingWarning
LspDiagnosticsFloatingInformation
LspDiagnosticsFloatingHint
<
Parameters: ~
{opts} table Configuration table
• show_header (boolean, default true): Show
"Diagnostics:" header.
{bufnr} number The buffer number
{line_nr} number The line number
{client_id} number|nil the client id
Return: ~
table {popup_bufnr, win_id}
==============================================================================
Lua module: vim.lsp.handlers *lsp-handlers*
*vim.lsp.handlers.progress_handler()*
progress_handler({_}, {_}, {params}, {client_id})
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#workspace_executeCommand
*vim.lsp.handlers.signature_help()*
signature_help({_}, {method}, {result}, {_}, {bufnr}, {config})
Parameters: ~
{config} table Configuration table.
• border: (default=nil)
• Add borders to the floating window
• See |vim.api.nvim_open_win()|
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_declaration@seehttps://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_definition@seehttps://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_typeDefinition@seehttps://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_implementation|lsp-handler| for the method "textDocument/signatureHelp">
vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(
vim.lsp.handlers.signature_help, {
-- Use a sharp border with `FloatBorder` highlights
border = "single"
}
)
<
==============================================================================
Lua module: vim.lsp.util *lsp-util*
*vim.lsp.util.apply_text_document_edit()*
apply_text_document_edit({text_document_edit}, {index})
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})
Applies a list of text edits to a buffer.
Parameters: ~
{text_edits} (table) list of `TextEdit` objects
{buf_nr} (number) Buffer id
*vim.lsp.util.apply_workspace_edit()*
apply_workspace_edit({workspace_edit})
Applies a `WorkspaceEdit` .
Parameters: ~
{workspace_edit} (table) `WorkspaceEdit`
buf_clear_references({bufnr}) *vim.lsp.util.buf_clear_references()*
Removes document highlights from a buffer.
Parameters: ~
{bufnr} buffer id
*vim.lsp.util.buf_highlight_references()*
buf_highlight_references({bufnr}, {references})
Shows a list of document highlights for a certain buffer.
Parameters: ~
{bufnr} buffer id
{references} List of `DocumentHighlight` objects to
highlight
character_offset({buf}, {row}, {col}) *vim.lsp.util.character_offset()*
Returns the UTF-32 and UTF-16 offsets for a position in a
certain buffer.
Parameters: ~
{buf} buffer id (0 for current)
{row} 0-indexed line
{col} 0-indexed byte offset in line
Return: ~
(number, number) UTF-32 and UTF-16 index of the character
in line {row} column {col} in buffer {buf}
*vim.lsp.util.close_preview_autocmd()*
close_preview_autocmd({events}, {winnr})
Creates autocommands to close a preview window when events
happen.
Parameters: ~
{events} (table) list of events
{winnr} (number) window id of preview window
See also: ~
|autocmd-events|
*vim.lsp.util.compute_diff()*
compute_diff({old_lines}, {new_lines}, {start_line_idx}, {end_line_idx},
{offset_encoding})
Returns the range table for the difference between old and new
lines
Parameters: ~
{old_lines} table list of lines
{new_lines} table list of lines
{start_line_idx} int line to begin search for first
difference
{end_line_idx} int line to begin search for last
difference
{offset_encoding} string encoding requested by language
server
Return: ~
table start_line_idx and start_col_idx of range
*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, optional, default `{}` ) List of
strings to extend with converted lines
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})
Converts `textDocument/SignatureHelp` response to markdown
lines.
Parameters: ~
{signature_help} Response of `textDocument/SignatureHelp`
Return: ~
list of lines of converted markdown.
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_signatureHelp
create_file({change}) *vim.lsp.util.create_file()*
TODO: Documentation
delete_file({change}) *vim.lsp.util.delete_file()*
TODO: Documentation
*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
*vim.lsp.util.fancy_floating_markdown()*
fancy_floating_markdown({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. The result is shown
in a floating preview.
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_left number of columns to pad contents
at left
• pad_right number of columns to pad contents
at right
• 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
focusable_float({unique_name}, {fn}) *vim.lsp.util.focusable_float()*
Parameters: ~
{unique_name} (string) Window variable
{fn} (function) should return create a new
window and return a tuple of
({focusable_buffer_id}, {window_id}). if
{focusable_buffer_id} is a valid buffer id,
the newly created window will be the new
focus associated with the current buffer
via the tag `unique_name` .
Return: ~
(pbufnr, pwinnr) if `fn()` has created a new window; nil
otherwise
*vim.lsp.util.focusable_preview()*
focusable_preview({unique_name}, {fn})
Focuses/unfocuses the floating preview window associated with
the current buffer via the window variable `unique_name` . If
no such preview window exists, makes a new one.
Parameters: ~
{unique_name} (string) Window variable
{fn} (function) The return values of this
function will be passed directly to
|vim.lsp.util.open_floating_preview()|, in
the case that a new floating window should
be created
get_effective_tabstop({bufnr}) *vim.lsp.util.get_effective_tabstop()*
Returns visual width of tabstop.
Parameters: ~
{bufnr} (optional, number): Buffer handle, defaults to
current
Return: ~
(number) tabstop visual width
See also: ~
|softtabstop|
get_progress_messages() *vim.lsp.util.get_progress_messages()*
TODO: Documentation
jump_to_location({location}) *vim.lsp.util.jump_to_location()*
Jumps to a location.
Parameters: ~
{location} ( `Location` | `LocationLink` )
Return: ~
`true` if the jump succeeded
locations_to_items({locations}) *vim.lsp.util.locations_to_items()*
Returns the items with the byte position calculated correctly
and in sorted order, for display in quickfix and location
lists.
Parameters: ~
{locations} (table) list of `Location` s or
`LocationLink` s
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)
Return: ~
(table) Options
*vim.lsp.util.make_formatting_params()*
make_formatting_params({options})
Creates a `FormattingOptions` object for the current buffer
and cursor position.
Parameters: ~
{options} Table with valid `FormattingOptions` entries
Return: ~
`FormattingOptions 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})
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, number}, optional) mark-indexed
position. Defaults to the start of the last
visual selection.
{end_pos} ({number, number}, optional) mark-indexed
position. Defaults to the end of the last
visual selection.
Return: ~
{ textDocument = { uri = `current_file_uri` }, range = {
start = `start_position` , end = `end_position` } }
make_position_params() *vim.lsp.util.make_position_params()*
Creates a `TextDocumentPositionParams` object for the current
buffer and cursor position.
Return: ~
`TextDocumentPositionParams` object
See also: ~
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocumentPositionParams
make_range_params() *vim.lsp.util.make_range_params()*
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` .
Return: ~
{ textDocument = { uri = `current_file_uri` }, range = {
start = `current_position` , end = `current_position` } }
make_text_document_params() *vim.lsp.util.make_text_document_params()*
Creates a `TextDocumentIdentifier` object for the current
buffer.
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} dictionary with optional fields
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}) *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()*
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
set_loclist({items}) *vim.lsp.util.set_loclist()*
Fills current window's location list with given list of items.
Can be obtained with e.g. |vim.lsp.util.locations_to_items()|.
Parameters: ~
{items} (table) list of items
set_qflist({items}) *vim.lsp.util.set_qflist()*
Fills quickfix list with given list of items. Can be obtained
with e.g. |vim.lsp.util.locations_to_items()|.
Parameters: ~
{items} (table) list of items
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
set_level({level}) *vim.lsp.log.set_level()*
Sets the current log level.
Parameters: ~
{level} (string or 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*
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): Parameters for the invoked LSP method
Return: ~
(bool) `true` if notification could be sent, `false` if
not
request({method}, {params}, {callback}) *vim.lsp.rpc.request()*
Sends a request to the LSP server and runs {callback} upon
response.
Parameters: ~
{method} (string) The invoked LSP method
{params} (table) Parameters for the invoked LSP method
{callback} (function) Callback to invoke
Return: ~
(bool, number) `(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} RPC error code defined in
`vim.lsp.protocol.ErrorCodes`
{message} (optional) arbitrary message to send to server
{data} (optional) 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.
Parameters: ~
{cmd} (string) Command to start the LSP
server.
{cmd_args} (table) List of additional string
arguments to pass to {cmd}.
{dispatchers} (table, optional) Dispatchers for
LSP message types. Valid dispatcher
names are:
• `"notification"`
• `"server_request"`
• `"on_error"`
• `"on_exit"`
{extra_spawn_params} (table, optional) 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()|
Members:
• {pid} (number) The LSP server's PID.
• {handle} A handle for low-level interaction with the LSP
server process |vim.loop|.
==============================================================================
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})
`*` to match one or more characters in a path segment `?` to
match on one character in a path segment `**` to match any
number of path segments, including none `{}` to group
conditions (e.g. `**​/*.{ts,js}` matches all TypeScript and
JavaScript files) `[]` to declare a range of characters to
match in a path segment (e.g., `example.[0-9]` to match on
`example.0` , `example.1` , …) `[!...]` to negate a range of
characters to match in a path segment (e.g., `example.[!0-9]`
to match on `example.a` , `example.b` , but not `example.0` )
vim:tw=78:ts=8:ft=help:norl:
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