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In specs2 there is a method called Around, documented here that has the following example:

object http extends Around { def around[T <% Result](t: =>T) = openHttpSession("test") { t // execute t inside a http session } }

The source for this code can be found here.

I'm curious what the <% operator means in this context?

EDIT: here is a solid answer on this subject, What are Scala context and view bounds?

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    Google is painful to use to search for symbols, but PDF viewers are pretty good: take a look at the Scala Language Specification (or "SLS"). The term for this type restriction is "View Bounds". Commented Jul 17, 2012 at 4:27
  • I had to use this symbol-specific search engine to find it: symbolhound.com Commented Oct 23, 2016 at 11:01

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This is a view bound. It means, that the type T must be convertible to the type Result. For more information about type bounds I recommend you http://www.cs.uwaterloo.ca/~brecht/courses/702/Possible-Readings/scala/ProgrammingInScala.pdf, starting at page 61.

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