Neovim 101 —Tree-sitter Usage

Practical usage of Neovim Tree-sitter.

Previously, we went through the basics of Tree-sitter. In this article, let’s go through Tree-sitter usage to help us in coding.

This article is part of the Neovim 101 series.

The Neovim configuration files are available in this repository.

• Neovim 101 — Tree-sitter

Getting Started

We already went through some of the practical usages of Tree-sitter in the Neovim Tips for a Betting Coding Experience series. This article covers additional tips not mentioned in the series.

Swapping

Previously we use the nvim-treesitter-textobjects plugin to swap parameters. Let’s extend this feature to other text objects.

In the lua/config/treesitter.lua file, we add the following code.

• We define the key mappings to swap different text objects (line 1 — line 15)
• We configure the swap mappings (line 25 — line 29)

Now we can swap classes.

• <Alt-n><Alt-c> to swap with the next class
• <Alt-p><Alt-c> to swap with the previous class

Swapping Classes

We can swap functions

• <Alt-n><Alt-f> to swap with the next function
• <Alt-p><Alt-f> to swap with the previous function

Swapping Functions

We can swap parameters

• <Alt-n><Alt-p> to swap with the next parameter
• <Alt-p><Alt-p> to swap with the previous parameter