rust-analyzer/lib/line-index/README.md

line-index

This crate is developped as part of rust-analyzer.

line-index is a library to convert between text offset and its corresponding line/column.

Installation

To add this crate to a project simply run cargo add line-index.

Usage

The main structure is LineIndex. It is constructed with an utf-8 text then various utility functions can be used on it.

Example

use line_index::LineIndex;

let line_index = LineIndex::new("This is a\nmulti-line\ntext.");
line_index.line_col(3.into()); // LineCol { line: 0, col: 3 }
line_index.line_col(13.into()); // LineCol { line: 1, col: 3 }
line_index.offset(LineCol { line: 2, col: 3 }); // Some (24)

SemVer

This crate follows semver principles.