Author Name: Rupert Swarbrick (@rswarbrick)
Original Redmine Issue: 1283 from https://www.veripool.org

The default behaviour of verilog-mode is that '_' is a word constituent (syntax class 'w'). This means that M-f and M-b jump over entire symbols, so hitting M-f when point is at the start of "my_long_symbol_name" jumps to the end.

It would be nice to make this configurable. I thought that I could do this without any hacking on the internals of verilog-mode with this snippet in my .emacs:

(defun rjs/verilog-mode-hook ()
  (set-syntax-table
    (let ((table (make-syntax-table verilog-mode-syntax-table)))
      (modify-syntax-entry ?_ "_" table)
      table)))

(add-hook 'verilog-mode-hook #'rjs/verilog-mode-hook)

This kind of works, but now the font locking gets a little weird if you have a variable like "get_a_from_b" because "from" gets highlighted as a keyword.

To fix this, please could you change the regexps for defining verilog-font-lock-keywords to use \< and \> instead of \< and \>? This is lines starting at verilog-mode.el:3246 in the checkout I have. I think this will have no effect if the user has "" as a word constituent, but it fixes font locking if "" is given the syntax of a symbol (which is more compatible with how other emacs major modes work).

Many thanks,

Rupert