vty: enable optional-multi-choice syntax: [(one|two)]

Since very recently we sensibly handle commands like

  cmd ([one]|[two]|[three])

as optional multi-choice arguments. In addition, support the more obvious
syntax of

  cmd [(one|two|three)]

Internally, the tokens are mangled to [one] [two] and [three], which is how the
rest of the code detects optional args, and makes sense in terms of UI:

  > cmd ?
  [one]
  [two]
  [three]

(i.e. optional arguments are always shown in braces in '?' listings)

Before this patch, commands defined with a syntax like [(one|two)], would lead
to an assertion (shows as "multiple") during program startup.

Change-Id: I952b3c00f97e2447f2308b0ec6f5f1714692b5b2

0 files changed, 0 insertions, 0 deletions