From e219008320201ddbb0295daeed7a2e5c8ab2e83e Mon Sep 17 00:00:00 2001
From: Vinnie Falco <vinnie.falco@gmail.com>
Date: Fri, 14 Feb 2014 11:13:45 -0800
Subject: [PATCH] Make abstract_clock members const

---
 beast/chrono/abstract_clock.h | 12 ++++++------
 beast/chrono/manual_clock.h   |  4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/beast/chrono/abstract_clock.h b/beast/chrono/abstract_clock.h
index d150d267c..170e663a7 100644
--- a/beast/chrono/abstract_clock.h
+++ b/beast/chrono/abstract_clock.h
@@ -72,15 +72,15 @@ public:
     virtual bool is_steady () const = 0;
 
     /** Returns the current time. */
-    virtual time_point now () = 0;
+    virtual time_point now () const = 0;
 
     /** Convert the specified time point to a string. */
     /** @{ */
-    virtual std::string to_string (time_point const& tp) = 0;
+    virtual std::string to_string (time_point const& tp) const = 0;
 
     template <class Duration2>
     std::string to_string (
-        std::chrono::time_point <abstract_clock, Duration2> const& tp)
+        std::chrono::time_point <abstract_clock, Duration2> const& tp) const
     {
         return to_string (
             std::chrono::time_point_cast <Duration> (tp));
@@ -88,7 +88,7 @@ public:
     /** @} */
 
     /** Returning elapsed ticks since the epoch. */
-    rep elapsed ()
+    rep elapsed () const
     {
         return now().time_since_epoch().count();
     }
@@ -109,7 +109,7 @@ struct basic_abstract_clock_wrapper : public abstract_clock <Duration>
         return TrivialClock::is_steady;
     }
 
-    time_point now ()
+    time_point now () const
     {
         return time_point (duration (
             std::chrono::duration_cast <duration> (
@@ -123,7 +123,7 @@ struct abstract_clock_wrapper
 {
     // generic conversion displays the duration
     std::string to_string (typename basic_abstract_clock_wrapper <
-        TrivialClock, Duration>::time_point const& tp)
+        TrivialClock, Duration>::time_point const& tp) const
     {
         std::stringstream ss;
         ss << tp.time_since_epoch();
diff --git a/beast/chrono/manual_clock.h b/beast/chrono/manual_clock.h
index 032be6130..ad373725c 100644
--- a/beast/chrono/manual_clock.h
+++ b/beast/chrono/manual_clock.h
@@ -48,12 +48,12 @@ public:
         return IsSteady;
     }
 
-    time_point now ()
+    time_point now () const
     {
         return m_now;
     }
 
-    std::string to_string (time_point const& tp)
+    std::string to_string (time_point const& tp) const
     {
         std::stringstream ss;
         ss << tp.time_since_epoch() << " from start";