{
    "nvim-treesitter/nvim-treesitter",
    event = { "BufReadPost", "BufNewFile" },
    cmd = { "TSInstall", "TSBufEnable", "TSBufDisable", "TSModuleInfo" },
    build = ":TSUpdate",
    dependencies = {
      "nvim-treesitter/nvim-treesitter-textobjects",
    },
    opts = function()
      return require "plugins.configs.treesitter"
    end,
    config = function(_, opts)
      dofile(vim.g.base46_cache .. "syntax")
      require("nvim-treesitter.configs").setup(opts)
      -- use the python highlighter for .mojo files, which are recognized as conf ones
      -- vim.treesitter.language.register('python', 'conf')

      local parser_config = require "nvim-treesitter.parsers".get_parser_configs()
      parser_config.mojo = {
        install_info = {
          url = "https://github.com/lsh/tree-sitter-mojo", -- local path or git repo
          files = {"src/parser.c"}, -- note that some parsers also require src/scanner.c or src/scanner.cc
          -- optional entries:
          branch = "main", -- default branch in case of git repo if different from master
          generate_requires_npm = false, -- if stand-alone parser without npm dependencies
          requires_generate_from_grammar = false, -- if folder contains pre-generated src/parser.c
        },
        filetype = "mojo", -- if filetype does not match the parser name
      }

      -- Set the comment string for Mojo files
      vim.api.nvim_create_autocmd("FileType", {
        pattern = "mojo",
        callback = function()
          vim.bo.commentstring = "# %s"
        end,
      })
    end,
  },

   {
    "nvim-treesitter/nvim-treesitter",
    event = { "BufReadPost", "BufNewFile" },
    cmd = { "TSInstall", "TSBufEnable", "TSBufDisable", "TSModuleInfo" },
    build = ":TSUpdate",
    dependencies = {
      "nvim-treesitter/nvim-treesitter-textobjects",
    },
    opts = function()
      return require "plugins.configs.treesitter"
    end,
    config = function(_, opts)
      dofile(vim.g.base46_cache .. "syntax")
      require("nvim-treesitter.configs").setup(opts)
      -- use the python highlighter for .mojo files, which are recognized as conf ones
      -- vim.treesitter.language.register('python', 'conf')

      local parser_config = require "nvim-treesitter.parsers".get_parser_configs()
      parser_config.mojo = {
        install_info = {
          url = "https://github.com/lsh/tree-sitter-mojo", -- local path or git repo
          files = {"src/parser.c"}, -- note that some parsers also require src/scanner.c or src/scanner.cc
          -- optional entries:
          branch = "main", -- default branch in case of git repo if different from master
          generate_requires_npm = false, -- if stand-alone parser without npm dependencies
          requires_generate_from_grammar = false, -- if folder contains pre-generated src/parser.c
        },
        filetype = "mojo", -- if filetype does not match the parser name
      }

      -- Set the comment string for Mojo files
      vim.api.nvim_create_autocmd("FileType", {
        pattern = "mojo",
        callback = function()
          vim.bo.commentstring = "# %s"
        end,
      })
    end,
  },

@value
struct Shape:
    var area: Float64


trait Drawable:
    fn get_shapes(ref self) -> ref [self] List[Shape]:
        ...

@value
struct Canvas(Drawable):
    var shapes: List[Shape]

    fn get_shapes(ref self) -> ref [self] List[Shape]:
        return self.shapes

    fn total_area(self) -> Float64:
        var total: Float64 = 0
        for shape in self.shapes:
            total += shape[].area
        return total

fn main():
    var canvas = Canvas(shapes=List[Shape]())

    shapes = canvas.get_shapes()
    shapes.append(Shape(area=10.5))
    print(canvas.total_area())

@value
struct Shape:
    var area: Float64


trait Drawable:
    fn get_shapes(ref self) -> ref [self] List[Shape]:
        ...

@value
struct Canvas(Drawable):
    var shapes: List[Shape]

    fn get_shapes(ref self) -> ref [self] List[Shape]:
        return self.shapes

    fn total_area(self) -> Float64:
        var total: Float64 = 0
        for shape in self.shapes:
            total += shape[].area
        return total

fn main():
    var canvas = Canvas(shapes=List[Shape]())

    shapes = canvas.get_shapes()
    shapes.append(Shape(area=10.5))
    print(canvas.total_area())

error: invalid call to 'high_order_func': argument #0 cannot be converted from unknown overload to an instance of 'fn(Foo) -> Int'; did you mean to instantiate 'fn(Foo) -> Int'?
    print(high_order_func(foo.func))
          ~~~~~~~~~~~~~~~^~~~~~~~~~

error: invalid call to 'high_order_func': argument #0 cannot be converted from unknown overload to an instance of 'fn(Foo) -> Int'; did you mean to instantiate 'fn(Foo) -> Int'?
    print(high_order_func(foo.func))
          ~~~~~~~~~~~~~~~^~~~~~~~~~