Update documentation

doc/uuid/design_notes.adoc

@@ -3,6 +3,6 @@
 
 :idprefix: design_notes_
 
-The document, http://www.itu.int/ITU-T/studygroups/com17/oid/X.667-E.pdf, was used to design and implement the *boost::uuids::uuid* struct.
+The document http://www.itu.int/ITU-T/studygroups/com17/oid/X.667-E.pdf was used to design and implement the `uuid` struct.
 
-All functions are re-entrant. Classes are as thread-safe as an int. That is an instance can not be shared between threads without proper synchronization.
+All functions are re-entrant. Classes are as thread-safe as an int. That is an instance cannot be shared between threads without proper synchronization.

doc/uuid/name_generator.adoc

@@ -18,7 +18,7 @@ namespace uuids {
 using name_generator = name_generator_sha1;
 using name_generator_latest = name_generator_sha1;
 
-}} //namespace boost::uuids
+}} // namespace boost::uuids
 ----
 
 This header makes `name_generator_sha1` and `name_generator_md5` available and declares the compatibility aliases `name_generator` and `name_generator_latest`.

doc/uuid/name_generator_md5.adoc

@@ -29,7 +29,7 @@ public:
     uuid operator()( void const* buffer, std::size_t byte_count ) const noexcept;
 };
 
-}} //namespace boost::uuids
+}} // namespace boost::uuids
 ----
 
 === name_generator_md5

doc/uuid/name_generator_sha1.adoc

@@ -29,7 +29,7 @@ public:
     uuid operator()( void const* buffer, std::size_t byte_count ) const noexcept;
 };
 
-}} //namespace boost::uuids
+}} // namespace boost::uuids
 ----
 
 === name_generator_sha1

doc/uuid/nil_generator.adoc

@@ -18,7 +18,7 @@ struct nil_generator
 
 uuid nil_uuid() noexcept;
 
-}} //namespace boost::uuids
+}} // namespace boost::uuids
 ----
 
 === nil_generator

doc/uuid/string_generator.adoc

@@ -24,7 +24,7 @@ struct string_generator
       uuid operator()( CharIterator begin, CharIterator end ) const;
 };
 
-}} //namespace boost::uuids
+}} // namespace boost::uuids
 ----
 
 === string_generator

doc/uuid/uuid_clock.adoc

@@ -23,8 +23,12 @@ public:
 
     static time_point now() noexcept;
 
-    static time_point from_sys( std::chrono::system_clock::time_point const& tp ) noexcept;
-    static std::chrono::system_clock::time_point to_sys( time_point const& tp ) noexcept;
+    template<class Duration>
+      static time_point from_sys(
+        std::chrono::time_point<std::chrono::system_clock, Duration> const& tp ) noexcept;
+
+    static std::chrono::time_point<std::chrono::system_clock, duration>
+      to_sys( time_point const& tp ) noexcept;
 
     static time_point from_timestamp( std::uint64_t timestamp ) noexcept;
     static std::uint64_t to_timestamp( time_point const& tp ) noexcept;
@@ -48,15 +52,18 @@ Returns: :: The current system time (`std::chrono::system_clock::now()`, convert
 === from_sys
 
 ```
-static time_point from_sys( std::chrono::system_clock::time_point const& tp ) noexcept;
+template<class Duration>
+  static time_point from_sys(
+    std::chrono::time_point<std::chrono::system_clock, Duration> const& tp ) noexcept;
 ```
 
 Returns: :: The `uuid_clock::time_point` corresponding to `tp`.
 
 === to_sys
 
 ```
-static std::chrono::system_clock::time_point to_sys( time_point const& tp ) noexcept;
+static std::chrono::time_point<std::chrono::system_clock, duration>
+  to_sys( time_point const& tp ) noexcept;
 ```
 
 Returns: :: The `std::chrono::system_clock::time_point` corresponding to `tp`.