FEATURES.md

Supported Features

This document tracks which features defined in the Language Server Protocol (LSP) specification are currently supported by tower-lsp and to what degree. Please note that this document is provided as-is and will be updated over time on a best-effort basis. There is no guarantee that it will always reflect the current reality exactly on the mainline branch. However, it should be updated on every tower-lsp release at minimum.

Feel free to open a new discussion thread if there are any questions. Drive-by pull requests correcting this document are always welcome!

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Message Type

Symbol	Description	Location in API
↩️	Request, client to server	LanguageServer trait
↪️	Request, server to client	Client struct
➡️	Notification, client to server	LanguageServer trait
⬅️	Notification, server to client	Client struct

Support Status

Symbol	Description
🟢	Supported
🟡	Partial support (see footnote provided)
🔴	Unsupported

Overall status: (80.5/90) ~89.4%

3.17.0 - 2022-05-10

Status: (12/16)

Method Name	Message Type	Supported	Tracking Issue(s)
notebookDocument/didOpen	➡️	🔴
notebookDocument/didChange	➡️	🔴
notebookDocument/didSave	➡️	🔴
notebookDocument/didClose	➡️	🔴
textDocument/prepareTypeHierarchy	↩️	🟢
typeHierarchy/supertypes	↩️	🟢
typeHierarchy/subtypes	↩️	🟢
textDocument/inlayHint	↩️	🟢	#352
inlayHint/resolve	↩️	🟢	#352
workspace/inlayHint/refresh	↪️	🟢	#352
textDocument/inlineValue	↩️	🟢	#352
workspace/inlineValue/refresh	↪️	🟢	#352
textDocument/diagnostic	↩️	🟢	#374
workspace/diagnostic	↩️	🟢	#374
workspace/diagnostic/refresh	↪️	🟢	#374
workspaceSymbol/resolve	↩️	🟢

3.16.0 - 2020-12-14

Status: (18/20)

Method Name	Message Type	Supported	Tracking Issue(s)
$/setTrace	➡️	🔴
$/logTrace	⬅️	🔴
textDocument/prepareCallHierarchy	↩️	🟢
callHierarchy/incomingCalls	↩️	🟢
callHierarchy/outgoingCalls	↩️	🟢
workspace/codeLens/refresh	↪️	🟢
textDocument/semanticTokens/full	↩️	🟢	#146
textDocument/semanticTokens/full/delta	↩️	🟢	#146
textDocument/semanticTokens/range	↩️	🟢	#146
workspace/semanticTokens/refresh	↪️	🟢	#146
textDocument/moniker	↩️	🟢
codeAction/resolve	↪️	🟢
textDocument/linkedEditingRange	↩️	🟢
workspace/willCreateFiles	↩️	🟢
workspace/didCreateFiles	➡️	🟢
workspace/willRenameFiles	↩️	🟢
workspace/didRenameFiles	➡️	🟢
workspace/willDeleteFiles	↩️	🟢
workspace/didDeleteFiles	➡️	🟢
window/showDocument	↪️	🟢

3.15.0 - 2020-01-14

Status: (1/4)

Method Name	Message Type	Supported	Tracking Issue(s)
$/progress	➡️ ⬅️	🔴	#176, #380, #381
window/workDoneProgress/create	↪️	🔴	#381
window/workDoneProgress/cancel	➡️	🔴	#381
textDocument/selectionRange	↩️	🟢	#10

3.14.0 - 2018-12-13

Status: (1/1)

Method Name	Message Type	Supported	Tracking Issue(s)
textDocument/declaration	↩️	🟢	#10

3.12.0 - 2018-08-23

Status: (1/1)

Method Name	Message Type	Supported	Tracking Issue(s)
textDocument/prepareRename	↩️	🟢	#10

3.10.0 - 2018-07-23

Status: (1/1)

Method Name	Message Type	Supported	Tracking Issue(s)
textDocument/foldingRange	↩️	🟢	#10

3.6.0 - 2018-02-22

Status: (7/7)

Method Name	Message Type	Supported	Tracking Issue(s)
workspace/workspaceFolders	↪️	🟢	#13
workspace/didChangeWorkspaceFolders	➡️	🟢	#8
workspace/configuration	↪️	🟢	#13
textDocument/typeDefinition	↩️	🟢	#10
textDocument/implementation	↩️	🟢	#10
textDocument/documentColor	↩️	🟢	#10
textDocument/colorPresentation	↩️	🟢	#10

3.0.0 - 2017-02-08

Status: (39.5/40)

Method Name	Message Type	Supported	Tracking Issue(s)
initialize	↩️	🟢
initialized	➡️	🟢
client/registerCapability	↪️	🟢	#13
client/unregisterCapability	↪️	🟢	#13
shutdown	↩️	🟢
exit	➡️	🟢
textDocument/didOpen	➡️	🟢
textDocument/didChange	➡️	🟢
textDocument/willSave	➡️	🟢	#118
textDocument/willSaveWaitUntil	↩️	🟢	#10
textDocument/didSave	➡️	🟢
textDocument/didClose	➡️	🟢
textDocument/definition	↩️	🟢	#10
textDocument/references	↩️	🟢	#10
textDocument/documentHighlight	↩️	🟢
textDocument/documentLink	↩️	🟢	#10
documentLink/resolve	↩️	🟢	#12
textDocument/hover	↩️	🟢
textDocument/codeLens	↩️	🟢	#10
codeLens/resolve	↩️	🟢	#11
textDocument/documentSymbol	↩️	🟢	#10
textDocument/completion	↩️	🟢	#10
completionItem/resolve	↩️	🟢	#9
textDocument/publishDiagnostics	⬅️	🟢
textDocument/signatureHelp	↩️	🟢	#10
textDocument/codeAction	↩️	🟢	#10
textDocument/formatting	↩️	🟢	#10
textDocument/rangeFormatting	↩️	🟢	#10
textDocument/onTypeFormatting	↩️	🟢	#10
textDocument/rename	↩️	🟢	#10
workspace/symbol	↩️	🟢	#8
workspace/didChangeConfiguration	➡️	🟢	#8
workspace/didChangeWatchedFiles	➡️	🟢	#8
workspace/executeCommand	↩️	🟢	#8
workspace/applyEdit	↪️	🟢	#13
window/showMessage	⬅️	🟢
window/showMessageRequest	↪️	🟢	#13
window/logMessage	⬅️	🟢
telemetry/event	⬅️	🟢
$/cancelRequest	➡️ ⬅️	🟡1	#145, #231

Footnotes

1. Server-to-client $/cancelRequest support is not yet implemented. However, the raw message can be emitted manually using Client::send_notification(). Client-to-server support is implemented via async/await task cancellation. ↩