To install this package, run in Emacs:
M-x package-install RET d-mode RET
This mode supports most of D's syntax, including nested /+ +/ comments and backquote `string literals`. This mode has been dubbed "2.0" because it is a complete rewrite from scratch. The previous d-mode was based on cc-mode 5.28 or so. This version is based on the cc-mode 5.30 derived mode example by Martin Stjernholm, 2002.