Binary-Swap: swap operands in binary expressions

Small plugin for neovim 0.8+ powered on treesitter for swapping operands and operators in binary expressions: 123 > 0 to 0 < 123 and 1 + 2 to 2 + 1

• Comparison operations;
• Mathematical operations;

demo_binary-swap.mov

Installation

With packer.nvim:

use({
  'Wansmer/binary-swap.nvim',
  setup = function ()
    vim.keymap.set('n', 'YOUR PREFER KEYS', function ()
      require('binary-swap').swap_operands()
    end)
    vim.keymap.set('n', 'YOUR PREFER KEYS', function ()
      require('binary-swap').swap_operands_with_operator()
    end)
  end
})

Binary-wap doesn't set up keymaps by default and no required additional settings.

There are two methods available outside:

1. require('binary-swap').swap_operands() – swap only operands (e.g., MAX_VALUE >= getCurrentValue() will transform to getCurrentValue() >= MAX_VALUE, here operator >= is not changed);

2. require('binary-swap').swap_operands_with_operator() – swap operands and operator to opposite if possible. (e.g., MAX_VALUE >= getCurrentValue() transforms to getCurrentValue() <= MAX_VALUE)

Note

I considered a few different languages and at each of them node with binary expression node has type binary_expression. Plugin searches this type by default because have no reason to add additional options to set up. If in your favorite language, this type is different, feel free to open an issue.