pkg syscall (darwin-arm64), const IPPROTO_RDP = 27
pkg syscall (darwin-arm64), const IPPROTO_RDP ideal-int
pkg syscall (darwin-arm64), const IPPROTO_ROUTING = 43
pkg syscall (darwin-arm64), const IPPROTO_ROUTING ideal-int
pkg syscall (darwin-arm64), const IPPROTO_RSVP = 46
pkg syscall (darwin-arm64), const IPPROTO_RSVP ideal-int
pkg syscall (darwin-arm64), const IPPROTO_RVD = 66

Repetition  = "{" Expression "}" .
</pre>

<p>
Productions are expressions constructed from terms and the following
operators, in increasing precedence:
</p>
<pre class="grammar">
|   alternation
()  grouping
[]  option (0 or 1 times)
{}  repetition (0 to n times)
</pre>

<p>
Lowercase production names are used to identify lexical (terminal) tokens.
Non-terminals are in CamelCase. Lexical tokens are enclosed in