[Boost-bugs] [Boost C++ Libraries] #13105: Add missing top level include guards

Subject: [Boost-bugs] [Boost C++ Libraries] #13105: Add missing top level include guards
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-07-03 20:56:21

#13105: Add missing top level include guards
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 Reporter:  anonymous         |      Owner:  dgregor
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  function
  Version:  Boost 1.64.0      |   Severity:  Problem
 Keywords:                    |
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 This ticket is addressed by this pull request:
 https://github.com/boostorg/function/pull/13/files

 The missing top level include guard means that even if boost/function.hpp
 is included in a pre-compiled header, we still pay the heavy boost pp pre-
 processing cost every time it is also included.

 This is very problematic with Visual Studio intellisense:
 It pre-process and parses the translation unit on the fly to provide
 syntax/semantic highlighting.

 In our projects, this fix remove a couple of seconds in this process.
 (boost/function.hpp is included in many headers that result in pre-
 processing it multiple time per compilation units)

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Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13105>
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