Language Server Index Format

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Language Server Index Format, aka Language Server Index Format, is a json format created in 2019 by Dan Adler.

#1404on PLDB

5Years Old

Download source code:

git clone https://github.com/lsif/lsif.github.io

Homepage · Source Code

https://lsif.dev

Tags: jsonFormat
Language Server Index Format is developed on GitHub and has 17 stars
Early development of Language Server Index Format happened in Sourcegraph
Language Server Index Format is written in HTML, CSS, Markdown

Example from the web:

// a vertex representing the document
{ id: 1, type: "vertex", label: "document", uri: "file:///Users/username/sample.ts", languageId: "typescript" }
// a vertex representing the range for the identifier bar
{ id: 4, type: "vertex", label: "range", start: { line: 0, character: 9}, end: { line: 0, character: 12 } }
// an edge saying that the document with id 1 contains the range with id 4
{ id: 5, type: "edge", label: "contains", outV: 1, inV: 4}
// a vertex representing the actual hover result
{ id: 6, type: "vertex", label: "hoverResult",
  result: {
    contents: [
      { language: "typescript", value: "function bar(): void" }
    ]
  }
}
// an edge linking the hover result to the range.
{ id: 7, type: "edge", label: "textDocument/hover", outV: 4, inV: 6 }

Language features

Feature	Supported	Example	Token
Comments	✓	// A comment
Line Comments	✓	// A comment	//
Semantic Indentation	X