[MacPorts] #68036: lib2geom: build failure for 10.13: cannot use parentheses when declaring variable with deduced class template specialization type

[MacPorts]

#68036: lib2geom: build failure for 10.13: cannot use parentheses when declaring
variable with deduced class template specialization type
-------------------------+---------------------
  Reporter:  dyne2meter  |      Owner:  mascguy
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:  fixed       |   Keywords:
      Port:  lib2geom    |
-------------------------+---------------------

Comment (by kencu):

 Don't forget that your command line tools have to match your Xcode...

 you probably upgraded them, so now you would have to downgrade them again
 and ignore the endless reminders from MacOS to upgrade them forever more.

 (Personally, I added the MacOSX10.13.sdk to Xcode 10.x instead of
 downgrading.)

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Ticket URL: <https://trac.macports.org/ticket/68036#comment:9>
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