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Line break in lines with colons

I have Perl package name defined as command:


How can I tell LaTeX to hyphen package name after double colon but without any hyphen char eg.


should be

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marked as duplicate by Loop Space, Hendrik Vogt, Caramdir, lockstep, Martin Scharrer Mar 22 '11 at 22:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Maybe your question is answered here: Line break in lines with colons. (Possible duplicate?) – Hendrik Vogt Mar 22 '11 at 13:59
Yes, the main point of both questions is the same, but that question is more general - that's why I probably can't find it. – jesper Mar 22 '11 at 14:07
@jesper: So do the answers to that question answer yours? – Loop Space Mar 22 '11 at 14:09
Yes, but not as straight as this answers. I think this topic shouldn't be delete If you ask about this. – jesper Mar 22 '11 at 14:17
@Andrew: So what do you think? – Hendrik Vogt Mar 22 '11 at 14:28

1 Answer 1

up vote 3 down vote accepted

I usually define a command \dbr for discretionary breakpoints like this: \newcommand\dbr{\disretionary{}{}{}}. Then you can write XXXX::\dbr YYYY::\dbr ZZZZ, which should have the effect you desire.

To explain, \discretionary<arg1><arg2><arg3> tells TeX that a line break is permissible and that it should put <arg1> before the breakpoint, <arg2> after the breakpoint (in the next line), and <arg3> in the case that no line break is performed. See the TeXbook (page 95) for more details.

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