I am exploring LSP to get a feel for what it can do. Most things are pretty obvious, completion, find references, etc. I've been told that LSP will allow me to find all functions/methods in a given language but I've yet to figure out how that might be possible. After much searching and doing some investigations with a few languages in Emacs, I am starting to doubt that it is even possible. Am I missing something? Is it possible with a given LSP instance to find all methods by file, line and column location?
You would use the workspace symbol functionality. If you look in the "vscode-languageserver-protocol project, it says:
/**
A request to list project-wide symbols matching the query string given
by the WorkspaceSymbolParams. The response is
of type SymbolInformation[] or a Thenable that
resolves to such.
*/
LSP Documentation on Workspace
If you're using a client, you'd find the method that calls that. In the project I'm trying to do, using the Brackets.io client, the method is
client.requestSymbolsForDocument
for example. If you're writing your own client, then you'd implement the appropriate method. You may get some extra help here. For all functions in the current document, then look at document symbols.
That's about as I know, I'm also learning.
Good luck.
Sethmo
Related
Just like TImageList contains a collection of images, is there a similar component for generic files?
I know I can embed files as resources, but I'd like the convenience of storing different groups of files in different "TFileList" components, and to be able to retrieve files by name or by their position in the list.
Extra points if such a component allowed some sort of design time preview of the file content (just like TImageList lets you see what each image looks like, at design time).
(I come from Delphi where I wrote my own component to do the above, but before I rewrite and port the property editor and all that to Lazarus, maybe there is already something that is tried and tested...)
Thanks!
You can use pre-defined lazarus TFPGList to specialize list of the type, that you want, for example - UTF8String
But, there's no T<>List as a component, only as object.
So, yes, this feature will be useful and i can implement, if have time,
also, there's a very limited RTTI, which has been updated only a few months ago, so you can access Methods and Properties now, so FP is more systemized, than delphi pascal, but also not so enterprise-developed, which limits it to implementations for common opensource and shareware project problems.
Nevertheless, it is more stable and supported, even my friends can contribute.
I was trying to repro a tutorial about the creation of an Excel Add-in when something get wrong with the IntelliSense of Visual Studio. I was writing this code:
function updateStocks() {
Excel.run(function (ctx) {
var **range** = ctx.workbook.names.getItem("Stocks")
At this step, everything was fine, but after the getItem, I have tried to add .getRange() at which point the IntelliSense was not able to understand anything related to my variable range.
Screenshot
What is really "funny" is the fact that even if the properties are not displayed, when I write the code of the tutorial manually, the code is executed without mistake.
Why does this behavior occur and how can I correct it?
Are you able to see IntelliSense for other types within that .run? I.e., do you have everything up to the point where you get a Range from a named item? If you were to obtain the range differently (e.g., context.workbook.getSelectedRange()), do you get IntelliSense then?
This might be related to an issue (now fixed) where the CDN accidentally had the namedItem.getRange method removed (it was the only one that was affected, and we've put in measures to ensure we catch those in the future). See "Can't get range from a defined name". The CDN has been patched a couple weeks ago, but the JS IntelliSense file ("VSDOC") probably hadn't. If that's the case, it's a point-in-time issue that should resolve itself very very soon, as new deployments of the CDN will have the getRange method both in the VSDOC and everywhere else.
FWIW, you may still run into limitations of the JS IntelliSense engine (there are plenty, unfortunately: for example, trying to pass values across Promises, or passing in API objects as parameters to functions). The only true good workaround for this is using TypeScript, which allows you to declaratively assert to the compiler/IntelliSense-engine that "I know this type is an Excel.Range!") -- and offers a number of other goodies, async/await being a very major one. I personally believe that if you really want a "premier" Office.js-coding experience, TypeScript is the way to go. To that end, I describe how to use TypeScript in my book, "Building Office Add-ins using Office.js" (full disclosure, I am the author; but I've had many readers comment on how helpful of a resource it's been to them). The book is very much TypeScript-oriented, IntelliSense being one of the reasons (and async/await and let being the primary others) -- though I also offer an Appendix where I describe the JavaScript-only way of accomplishing the same Office.js tasks. It takes only a small amount of effort to get started with using TypeScript, and once you do, I don't think you'll look back.
As I have asked questions in this form - thanks for your many helpful answers - i have found many really neat things that one can do using ExtLibUtil.???? however, other than a bit here and a bit there I have not found anything that gives a listing on the various functions. I one post I read that it is all in the source of the extension Library, and it might be if you really understand where in the source to look. Sure would appreciate a pointer and starting point.
I've been unable to find a JavaDoc for it. The library slipped passed us when we wrote the book - certainly I was not as au fait with Java to be aware of it and all the strength within it. So the best option currently is to look at the source code in Eclipse. Many of the methods are helper methods to easily access things like viewScope etc, which is easy from SSJS but less easy from Java. Most are pretty self-explanatory.
Content assist doesn't seem to work from SSJS, but will from any Java class or, alternatively, open up one of the Java classes created for XPages / Custom Controls under the "local" package in Package Explorer, type "ExtLibUtil." in any method and you'll see the list.
I am working on a language service and would like the parsing after the user types code to be faster.
Right now I rely on the ParseReason.Check and OnIdle mechanism that's documented on MSDN, but its often called a long time after the user has typed code. Sometimes it helps to move the cursor to another line to trigger it faster.
What I'd like to do is to force parse the file after I detect the user has typed in the file. I'm able to detect when the user is typing, but I don't know how to trigger the parser with a ParseRequest.
I was running into a similar problem, I wanted to scan files not opened in VS. The best I could do was to abstract out my parse functionality so it gets called by VS, but also called by another internal function to my extension whenever I desired without going through VS, and this would store my parse results to the same structures as the direct VS call on ParseRequest.
I'd be curious to know if you find a better way of doing it though.
You could try calling BeginParse() on your Source implementation. That creates a ParseRequest with the Check parse reason. I turned off the OnIdle timer in my language service and tested it out and it appears to work.
If your code that detects user key-presses has access to an instance of your LanguageService implementation, then you can use service.GetSource(...).BeginParse(). If it has access to the Source itself, then it's even easier.
Is it possible to modify the order of the intellisense options shown when I hit ctrl-space?
Specifically, I'd like to order them in scope, so that if I have a variable in my function that matches what I've typed so far then it goes to the top of the list. If there's a member in the class, that's next, etc. I'm just kind of sick of having to type enough that I don't match some random global symbol in Windows' crypto libraries or whatever.
Is this kind of this possible? Where do I start? I looked for an obvious option in vs2010, but didn't find anything.
My programming language is native c++.
Here's what I've found so far.
A walkthrough showing how to add items to the intellisense popup: http://msdn.microsoft.com/en-us/library/ee372314.aspx
The walkthrough uses the ICompletionSession interface:
http://msdn.microsoft.com/en-us/library/microsoft.visualstudio.language.intellisense.icompletionsession.aspx
It looks as if you might be able to clear the CompletionSets, and replace them with your own completion sets, but I'm not sure if there's any way to change the order, or if they are always sorted. There is the IIntellisensePresenter interface, but it looks like it's pretty much empty.
Also, from the walkthrough, it looks like you can fill the CompletionSets with a dumb list of strings, so you'd need some other way of interrogating the symbols to determine scope, which may not always be possible.
In short: Probably not possible at the moment.