Dev411 Blog

Perl 6 [...] introduces an indentable, nestable, multi-line-able delimited comment:

#{ comment 
    here 
}
#[ comment 
    here 
]
#( comment here )
#< comment here >
#« comment etc. »

A delimited comment is introduced by a # followed immediately by any kind of opening bracket. It is closed by the corresponding closing bracket.

Would it be too much to ask that it accept any sequence of openingbrackets — e.g.

#<<<
#<{[

because I could easily see myself wanting to comment out blocks of code with unbalanced closing brackets of all four types (or, more to the point, a dynamic selection of closing bracket types). Having an unlimited variety of comment "identifiers" also facilitates arbitrarily nesting comments without artificial restrictions.

Not to much to ask at all. At least, not as long as you can be satisfied with multiple repetitions of the same delimiter character. From the latest update of Synopsis 2:

• For all quoting constructs that use user-selected brackets, multiple, adjacent, identical opening brackets must always be matched by an equal number of adjacent closing brackets. Bracket counting naturally applies only to sets of brackets of the same length:

  say #{{
      Comment contains unmatched } and { { { {
      plus a counted {{ ... }} pair.
  }} q<< <<woot>> >>   # says "<<woot>>"