dls 0.4.0

D Language Server

To use this package, run the following command in your project's root directory:

Manual usage
Put the following dependency into your project's dependences section:

This package provides sub packages which can be used individually:

dls:find - D Language Server

dls:bootstrap - DLS bootstrap utility

D Language Server

LSP compliance: 3.7.0

This is a work in progress. There ~~might~~ will be bugs and crashes...

DLS implements the server side of the Language Server Protocol (LSP) for the D programming language. It does not contain any language feature itself (yet), but uses already available components, and provides an interface to work with the LSP. Current features include:

  • Code completion
  • Go to definition
  • Error checking
  • Formatting
  • Symbol searching
  • Symbol highlighting
  • Documentation on hover
  • Random crashes

Libraries used (the stuff doing the actual hard work):


You can run dub fetch dls and then dub run dls:bootstrap to install dls. The second command will output a path to a symbolic link that will always point to the latest DLS executable. DLS will propose updates as they come, and update the symbolic link upon upgrading.

Client side configuration

All these keys should be formatted as d.dls.[section].[key] (e.g. d.dls.format.endOfLine).

Section: symbolTypeDefault value
Section: analysisTypeDefault value
Section: formatTypeDefault value
endOfLine"lf" or "cr" or "crlf""lf"
dfmtBraceStyle"allman" or "otbs" or "stroustrup""allman"
dfmtTemplateConstraintStyle"conditionalNewlineIndent" or "conditionalNewline" or "alwaysNewline" or "alwaysNewlineIndent""conditionalNewlineIndent"

The bootstrap subpackage and the update system

In order to simplify the process of updating DLS, an update system is implemented. However, the extension will need to locate a first version of DLS; this is where dls:bootstrap comes in. The steps are:

  • dub fetch dls will fetch the latest version of DLS
  • dub run --quiet dls:bootstrap will output the path to a symlink pointing to the latest DLS executable

Nothing specific is required on the client's part regarding updates: the server will send notifications to the user when an update is available, and build its next version (in parallel to responding to requests).


The server may delegate a few operations to the client-side extension depending on the language client's capabilities. The client should watch these files for the server to work properly:

  • dub.selections.json
  • dub.json
  • dub.sdl
  • *.ini

If the client supports dynamic registration of the workspace/didChangeWatchedFiles method, then the server will automatically register file watching. If the client doesn't support dynamic registration however, the client-side extension will need to manually do it. The server needs to know at least when dub.selections.json files change to properly provide completion support. If dub.json and dub.sdl are also watched, dub.selections.json will automatically be regenerated and then it will be used for completion support. Watching *.ini allows DLS to monitor D-Scanner config files, even if the name is changed in the config and isn't precisly dscanner.ini.

As support for messages regarding workspace folders are not yet supported in Visual Studio Code (used for testing the server), dls also lacks support for multiple workspace folders for now.

Example usage

I made a VSCode extension and an Atom package using DLS:

  • https://github.com/LaurentTreguier/vscode-dls
  • https://github.com/LaurentTreguier/ide-dlang
  • Laurent Tréguier
Sub packages:
dls:find, dls:bootstrap
dls:bootstrap, dub, arsd-official:color_base, dscanner, dcd, arsd-official:email, dfmt
0.26.2 2020-Mar-20
0.26.1 2020-Jan-25
0.26.0 2019-Dec-03
0.25.19 2019-Oct-29
0.25.18 2019-Oct-28
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