Arrow Function Syntax Highlighting

[paskozdilar]

I opened an issue in NeoVim related to this issue: https://github.com/neovim/neovim/issues/26246

They have pointed out that I should report this issue to the maintainer of the syntax files, which seems to be you :)

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Here's a code example that reproduces the invalid syntax highlighing when used in NeoVim:

function example(foo: string, bar: (baz: string, foobar: (foobaz: string, foobarbaz: () => void) => void) => void) {
  console.log('foo 1', foo);
  bar(foo, () => {
    console.log('foo 2', foo);
  });
}

function main() {
 example('foo', (baz: string, foobar: (foobaz: string, foobarbaz: () => void) => void) => {
   foobar(baz, () => {
      console.log('baz', baz);
   });
 });
}

In my Neovim (v0.10.0-dev) without any language server I get the following highlighting:

The arrow function callback on the line 10 is not highlighted properly. In contrast, the arrow function callback on line 3 is highlighted properly.