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Boost-Commit : |
From: bdawes_at_[hidden]
Date: 2007-12-05 17:16:18
Author: bemandawes
Date: 2007-12-05 17:16:18 EST (Wed, 05 Dec 2007)
New Revision: 41763
URL: http://svn.boost.org/trac/boost/changeset/41763
Log:
First cut at complete Duration requirements. Class nanoseconds specified based on those requirements.
Text files modified:
sandbox/committee/branches/date_time/thread_library.html | 1036 ++++-----------------------------------
1 files changed, 114 insertions(+), 922 deletions(-)
Modified: sandbox/committee/branches/date_time/thread_library.html
==============================================================================
--- sandbox/committee/branches/date_time/thread_library.html (original)
+++ sandbox/committee/branches/date_time/thread_library.html 2007-12-05 17:16:18 EST (Wed, 05 Dec 2007)
@@ -3494,9 +3494,9 @@
E</code>, <code>c</code> denotes an <code>int</code> value.</p>
<table style="border-collapse: collapse;" border="1" bordercolor="#111111" cellpadding="5" cellspacing="0" width="100%">
<tr>
- <td width="25%">expression</td>
- <td width="11%">return type</td>
- <td width="39%">return value</td>
+ <td width="25%"><b><i>expression</i></b></td>
+ <td width="11%"><b><i>return type</i></b></td>
+ <td width="39%"><b><i>return value or other requirement</i></b></td>
</tr>
<tr>
<td valign="top" width="25%"><code>D::tick_type</code></td>
@@ -3504,95 +3504,72 @@
<td width="39%"> </td>
</tr>
<tr>
- <td valign="top" width="25%"><code>D::ticks_per_second();</code></td>
+ <td valign="top" width="25%"><code>D::ticks_per_second;</code></td>
<td valign="top" width="11%"><code>D::tick_type</code></td>
- <td valign="top" width="39%">A constant indicating the number of ticks per
- second (or 0 for types for which <code>is_subsecond() == false</code>. </td>
+ <td valign="top" width="39%">The number of ticks per
+ second, or 0 for types for which <code>is_subsecond() == false</code>. </td>
</tr>
<tr>
- <td valign="top" width="25%"><code>D::seconds_per_tick();</code></td>
+ <td valign="top" width="25%"><code>D::seconds_per_tick;</code></td>
<td valign="top" width="11%"><code>D::tick_type</code></td>
- <td valign="top" width="39%">A constant indicating the number of seconds per
- tick (or 0 for types for which <code>is_subsecond() == true</code>. </td>
+ <td valign="top" width="39%">The number of seconds per
+ tick, or 0 for types for which <code>is_subsecond() == true</code>. </td>
</tr>
<tr>
- <td valign="top" width="25%"><code>D::is_subsecond();</code></td>
+ <td valign="top" width="25%"><code>D::is_subsecond;</code></td>
<td valign="top" width="11%"><code>bool</code></td>
- <td valign="top" width="39%"><code>true</code> if the resolution of D is
+ <td valign="top" width="39%"><code>true</code> if the resolution of <code>D</code> is
finer than 1 second, and otherwise <code>false</code>. </td>
</tr>
<tr>
<td valign="top" width="25%"><code>d.get_count();</code></td>
<td valign="top" width="11%"><code>D::tick_type</code></td>
- <td valign="top" width="39%"> </td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d <= e</code></td>
- <td valign="top" width="11%"><code>bool</code></td>
- <td valign="top" width="39%"><code>!(e < d)</code></td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d > e</code></td>
- <td valign="top" width="11%"><code>bool</code></td>
- <td valign="top" width="39%"><code>e < d</code></td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d >= e</code></td>
- <td valign="top" width="11%"><code>bool</code></td>
- <td valign="top" width="39%"><code>!(d < e)</code></td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d != e</code></td>
- <td valign="top" width="11%"><code>bool</code></td>
- <td valign="top" width="39%"><code>!(d == e)</code></td>
+ <td valign="top" width="39%">The most recent value established by a
+ non-const function.</td>
</tr>
<tr>
<td valign="top" width="25%"><code>-d;</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d - e</code></td>
- <td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><code>D(-d.tick_count())</code></td>
</tr>
<tr>
<td valign="top" width="25%"><code>d -= e</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
- </tr>
- <tr>
- <td valign="top" width="25%"><code>d + e</code></td>
- <td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><i>Postcondition:</i><code> d.tick_count ==
+ d.tick_count()</code><sub>at-entry</sub><code>-x</code>, where <code>x</code>
+ is <code>e.tick_count()</code> converted to the resolution of <code>D</code>.</td>
</tr>
<tr>
<td valign="top" width="25%"><code>d += e</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><i>Postcondition:</i><code> d.tick_count ==
+ d.tick_count()</code><sub>at-entry</sub><code>+x</code>, where <code>x</code>
+ is <code>e.tick_count()</code> converted to the resolution of <code>D</code>.</td>
</tr>
<tr>
<td valign="top" width="25%"><code>d / c</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><code>D(d.tick_count()/c)</code></td>
</tr>
<tr>
<td valign="top" width="25%"><code>d /= c</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><i>Postcondition:</i> <code>d.tick_count() ==
+ d.tick_count()</code><sub>at-entry</sub><code>/c</code></td>
</tr>
<tr>
<td valign="top" width="25%"><code>d * c</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><code>D(d.tick_count()*c)</code></td>
</tr>
<tr>
<td valign="top" width="25%"><code>d *= c</code></td>
<td valign="top" width="11%"><code>D</code></td>
- <td valign="top" width="39%"> </td>
+ <td valign="top" width="39%"><i>Postcondition:</i> <code>d.tick_count()
+ == d.tick_count()</code><sub>at-entry</sub><code>*c</code></td>
</tr>
</table>
-<p>Unless otherwise specified, no operations on duration types shall throw
+<p>Unless otherwise specified, no functions specified for duration types shall throw
exceptions.</p>
<h3><a name="time.system">31.2 Class system_time [time.system]</a></h3>
@@ -3671,6 +3648,10 @@
—<i>end note</i>]
</p>
+<p>Unless otherwise specified, no
+<code>system_time</code> member functions shall throw
+exceptions.</p>
+
<pre><code>
system_time();
</code></pre>
@@ -3683,10 +3664,6 @@
object representing the epoch time point 1970-01-01 00:00:00.000000000
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3709,10 +3686,6 @@
incremented appropriately.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3727,10 +3700,6 @@
The count of seconds since 1970-01-01 00:00:00.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3746,10 +3715,6 @@
since 1970-01-01 00:00:00.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3764,10 +3729,6 @@
1000000000
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3782,15 +3743,6 @@
0
</dd>
-<dt>Remarks:</dt>
-<dd>
-Since this is a subsecond type it returns 0 for seconds_per_tick.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3805,10 +3757,6 @@
true.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3825,10 +3773,6 @@
represented by <code>*this</code> is equal to the time represented by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3844,10 +3788,6 @@
by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3863,10 +3803,6 @@
<code>*this</code> is greater than the time represented by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3882,10 +3818,6 @@
by <code>*this</code> is greater or equal than the time represented by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3901,10 +3833,6 @@
is less than the time represented by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3920,10 +3848,6 @@
is less or equal than the time represented by <var>rhs</var>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -3942,757 +3866,187 @@
<dt>Remarks:</dt>
<dd>
-If rhs is greater the result will be a negative nanosecond.
-count.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename Duration>
-system_time operator+(const Duration& td) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-The duration converted to nanosecond resolution
-and added to the time represented by <code>*this</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename Duration>
-system_time& operator+=(const Duration& td);
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Effects:</dt>
-<dd>
-Convert the duration to nanosecond resolution
-and add it to the time represented by <code>*this</code>.
-</dd>
-
-<dt>Returns:</dt>
-<dd>
-Modified value of this.
-<b>[Crowl: not a reference to this?]</b>
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename Duration>
-system_time operator-(const Duration& td) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-The duration converted to nanosecond resolution
-and subtracted from the time represented by <code>*this</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename Duration>
-system_time& operator-=(const Duration& td)
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Effects:</dt>
-<dd>
-Convert the duration to nanosecond resolution
-and subtract it from the time represented by <code>*this</code>.
-</dd>
-
-<dt>Returns:</dt>
-<dd>
-Modified value of this.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-
-<h3><a name="time.getsystem">32.3 Function get_system_time [time.getsystem]</a></h3>
-
-<p>
-The function <code>get_system_time</code>
-provides access to the system clock at a
-resolution up to nanoseconds.
-The actual resolution may vary from platform to platform.
-</p>
-
-<blockquote>
-<pre><code>
-system_time get_system_time();
-</code></pre>
-</blockquote>
-
-
-<p>
-[<b>Comment:</b>
-Typical personal computer platforms currently achieve microsecond level
-resolution from calls to the clock.
-The
-<a href="http://www.boost.org/libs/date_time/index.html">
-Boost Date-Time Library</a>
-has a class that portably implements the proposed interface,
-but it uses different C-level interfaces depending on the operating
-system.
-—<b>end comment</b>]
-</p>
-
-<h3><span style="background-color: #FFFF00">xxxx Common Duration Functions [time.duration]</span></h3>
-
-<p>
-The following functions are common functions to all durations types.
-These
-functions provide the basis
-for durations to be EqualityComparable, LessThanComparable
-as well arithmetic operations.
-</p>
-
-<p>
-In the following text duration_type refers to the containing duration type.
-</p>
-
-<p>
-All duration types are EqualityComparable, LessThanComparable,
-CopyConstructable, DefaultConstructable, and Assignable for duration
-objects of the same type.
-</p>
-
-<blockquote>
-<pre><code>
-class Duration {
-
- // <em>traits information</em>
- typedef <var><strong>implementation-defined</strong></var> tick_type;
- static tick_type ticks_per_second();
- static tick_type seconds_per_tick();
- static bool is_subsecond();
-
- // <em>comparison operators</em>
- template<typename RhsDuration>
- bool operator< (const RhsDuration&) const;
-
- template<typename RhsDuration>
- bool operator<= (const RhsDuration&) const;
-
- template<typename RhsDuration>
- bool operator> (const RhsDuration&) const;
-
- template<typename RhsDuration>
- bool operator>= (const RhsDuration&) const;
-
- template<typename RhsDuration>
- bool operator== (const RhsDuration&) const;
-
- template<typename RhsDuration>
- bool operator!= (const RhsDuration&) const;
-
-
- // <em>sign inversion</em>
- Duration operator-() const
-
- // <em>arithmetic operations</em>
- template<typename RhsDuration>
- Duration operator- (const RhsDuration& d) const
-
- template<typename RhsDuration>
- Duration operator-=(const RhsDuration& d)
-
- template<typename RhsDuration>
- Duration operator+ (const RhsDuration& d) const
-
- template<typename RhsDuration>
- Duration operator+=(const RhsDuration& d)
-
- Duration operator/ (int divisor) const
- Duration operator/=(int divisor)
- Duration operator* (int rhs) const
- Duration operator*=(int divisor)
-
- tick_type get_count() const
-
-}
-</code></pre>
-</blockquote>
-
-<pre><code>
-static tick_type ticks_per_second();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-A constant defined separately for each <tt>Duration</tt> type indicating the
-number of ticks per second (or 0 for types which are not <code>is_subsecond</code>).
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-static tick_type seconds_per_tick();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-A constant defined separately for each <tt>Duration</tt> type indicating the
-number of seconds per tick (or 0 for types which are <code>is_subsecond</code>).
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-static bool is_subsecond();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-<code>true</code> if the resolution of this Duration is finer than 1 second,
-and otherwise <code>false</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator==(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if rhs duration is greater.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator!=(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if rhs is not the same time.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator>(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if the rhs duration is larger.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator>=(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if greater or equal than the rhs duration.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator<(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if less than the rhs duration.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-bool operator<=(const RhsDuration& rhs) const;
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-True if less or equal to the rhs duration.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-// <em>sign inversion</em>
-Duration operator-() const
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-Negated value of the duration.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-// <em>arithmetic operations</em>
-template<typename RhsDuration>
-Duration operator- (const RhsDuration& d) const
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-A duration value equal to this-rhs_duration.
-</dd>
-
-<dt>Remarks:</dt>
-<dd>
-This will fail to compile
-if the <code>RhsDuration</code> is of finer resolution than <code>*this</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-Duration operator-=(const RhsDuration& <var>d</var>)
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Effects:</dt>
-<dd>
-Modifies the value to <code>*this-<var>d</var></code>.
-</dd>
-
-<dt>Returns:</dt>
-<dd>
-<p>
-<code>this</code>
-<b>[Crowl: but this statement is inconsistent with the declaration!]</b>
-</p>
-</dd>
-
-<dt>Remarks:</dt>
-<dd>
-This will fail to compile
-if the <code>RhsDuration</code> is of finer resolution
-than <code>*this</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-Duration operator+ (const RhsDuration& d) const
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-<p>
-Duration equal to this+rhs_duration.
-</p>
-</dd>
-
-<dt>Remarks:</dt>
-<dd>
-This will fail to compile
-if the <code>RhsDuration</code> is of finer resolution
-than <code>*this</code>.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-template<typename RhsDuration>
-Duration operator+=(const RhsDuration& d)
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Effects:</dt>
-<dd>
-Modifies to value equal to this+rhs_duration.
-</dd>
-
-<dt>Returns:</dt>
-<dd>
-<p>
-this
-</p>
-</dd>
-
-<dt>Remarks:</dt>
-<dd>
-This will fail to compile
-if the <code>RhsDuration</code> is of finer resolution
-than <code>*this</code>.
+If rhs is greater the result will be a negative nanosecond.
+count.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
<pre><code>
-Duration operator/ (int divisor) const
+template<typename Duration>
+system_time operator+(const Duration& td) const;
</code></pre>
<blockquote>
<dl>
<dt>Returns:</dt>
<dd>
-Duration with value equal to this/divisor according to
-integer arithmetic rules.
+The duration converted to nanosecond resolution
+and added to the time represented by <code>*this</code>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
<pre><code>
-Duration operator/=(int divisor)
+template<typename Duration>
+system_time& operator+=(const Duration& td);
</code></pre>
<blockquote>
<dl>
<dt>Effects:</dt>
<dd>
-Change value of this by this/divisor according to integer
-arithmetic rules.
+Convert the duration to nanosecond resolution
+and add it to the time represented by <code>*this</code>.
</dd>
<dt>Returns:</dt>
<dd>
-this
+Modified value of this.
+<b>[Crowl: not a reference to this?]</b>
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
<pre><code>
-Duration operator* (int rhs) const
+template<typename Duration>
+system_time operator-(const Duration& td) const;
</code></pre>
<blockquote>
<dl>
<dt>Returns:</dt>
<dd>
-Duration with value equal to this*rhs
+The duration converted to nanosecond resolution
+and subtracted from the time represented by <code>*this</code>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
<pre><code>
-Duration operator*=(int rhs)
+template<typename Duration>
+system_time& operator-=(const Duration& td)
</code></pre>
<blockquote>
<dl>
<dt>Effects:</dt>
<dd>
-Modifies to value equal to this*rhs.
+Convert the duration to nanosecond resolution
+and subtract it from the time represented by <code>*this</code>.
</dd>
<dt>Returns:</dt>
<dd>
-this
+Modified value of this.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
+
+<h3><a name="time.getsystem">32.3 Function get_system_time [time.getsystem]</a></h3>
+
+<p>
+The function <code>get_system_time</code>
+provides access to the system clock at a
+resolution up to nanoseconds.
+The actual resolution may vary from platform to platform.
+</p>
+
<pre><code>
-tick_type get_count() const
-</code></pre>
+system_time get_system_time();</code></pre>
<blockquote>
<dl>
+
<dt>Returns:</dt>
<dd>
-The count at the resolution of the time duration type.
-</dd>
+The system time ([time.system]) as provided by the operating system.</dd>
<dt>Throws:</dt>
<dd>
-Nothing.
-</dd>
+<code>system_error</code>
+([syserr.syserr]) if unable to return the specified value. The conditions for
+which this might occur are implementation defined.</dd>
+
</dl>
</blockquote>
+
<h3><a name="time.nanoseconds">32.4 Class nanoseconds [time.nanoseconds]</a></h3>
<p>
Objects of class <code>nanoseconds</code> can be used to represent a count of nanoseconds.
Class <code>nanoseconds</code> shall be a duration type ([time.duration.requirements]).
-For the sake of exposition, the semantics of member functions is not described
-if they have the same apparent semantics as those specified by [time.duration.requirements].</p>
+For the sake of exposition, the semantics of member functions are not described
+if they have the same apparent semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
class nanoseconds
{
public:
-
- nanoseconds(long long=0);
- nanoseconds(const nanoseconds& rhs);
- ~nanoseconds();
-
// <em>traits information</em>
- static tick_type ticks_per_second();
- static tick_type seconds_per_tick();
- static bool is_subsecond();
typedef <var><strong>implementation-defined</strong></var> tick_type;
+ static const tick_type ticks_per_second = 1000000000;
+ static const tick_type seconds_per_tick = 0;
+ static const bool is_subsecond = true;
+
+ // <i>construct/copy/destroy functions</i>
+ nanoseconds(long long ns=0);
+ nanoseconds(const nanoseconds&);
+ nanoseconds(nanosecons&&);
+ nanoseconds& operator=(const nanoseconds&);
+ nanoseconds& operator=(nanoseconds&&);
+ ~nanoseconds();
- // <em>+ common functions</em>
-
-};
-</code></pre>
-</blockquote>
-
-<pre><code>
-nanoseconds(long long=0);
-</code></pre>
+ // <em>observer functions</em>
+ tick_type get_count() const;
-<blockquote>
-<dl>
-<dt>Effects:</dt>
-<dd>
-Constructs an object with a count of nanoseconds - default
-is zero.
-</dd>
+<i> // modifier functions</i>
+ template<typename RhsDuration>
+ nanoseconds& operator-=(const RhsDuration& d);
+ template<typename RhsDuration>
+ nanoseconds& operator+=(const RhsDuration& d);
+ nanoseconds& operator/=(int divisor);
+ nanoseconds& operator*=(int multiplier);
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
+ // <i>operations</i>
+ nanoseconds operator-() const;
+ nanoseconds operator*(int multiplier) const;
+ nanoseconds operator/(int divisor) const;
+};</code></pre>
</blockquote>
<pre><code>
-nanoseconds(const nanoseconds& rhs);
-</code></pre>
+nanoseconds(long long ns=0);</code></pre>
<blockquote>
<dl>
<dt>Effects:</dt>
<dd>
-Copy construction.
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-static tick_type ticks_per_second();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-1000000000
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<pre><code>
-static tick_type seconds_per_tick();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-0
+Constructs an object of type <code>nanoseconds</code>.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
+<dt>Postcondition:</dt>
+<dd><code>get_count() == ns;</code></dd>
</dl>
</blockquote>
<pre><code>
-static bool is_subsecond();
-</code></pre>
-
-<blockquote>
-<dl>
-<dt>Returns:</dt>
-<dd>
-true
-</dd>
-
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
-</dl>
-</blockquote>
-
-<h3><a name="time.microseconds">32.5 Class microseconds [time.microseconds]</a></h3>
+</code><a name="time.microseconds">32.5 Class microseconds [time.microseconds]</a></pre>
<p>
Objects of class <code>microseconds</code>
can be used to represent a count of microseconds. Class <code>microseconds</code>
shall be a duration type ([time.duration.requirements]). For the sake of
-exposition, the semantics of member functions is not described if they have the
-same apparent semantics as those specified by [time.duration.requirements].</p>
+exposition, the semantics of member functions are not described if they have the
+same apparent semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
@@ -4732,10 +4086,6 @@
is zero.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4750,10 +4100,6 @@
Copy construction.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4769,10 +4115,6 @@
microsecond count converted to nanoseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4787,10 +4129,6 @@
1000000
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4805,10 +4143,6 @@
0
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4823,10 +4157,6 @@
true
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4836,8 +4166,8 @@
Objects of class <code>milliseconds</code>
can be used to represent a count of milliseconds. Class <code>milliseconds</code>
shall be a duration type ([time.duration.requirements]). For the sake of
-exposition, the semantics of member functions is not described if they have the
-same apparent semantics as those specified by [time.duration.requirements].</p>
+exposition, the semantics of member functions are not described if they have the
+same apparent semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
@@ -4875,10 +4205,6 @@
is zero.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4893,10 +4219,6 @@
Copy construction.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4911,10 +4233,6 @@
millisecond count converted to nanoseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4929,10 +4247,6 @@
millisecond count converted to microseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4947,10 +4261,6 @@
1000
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4965,10 +4275,6 @@
0
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4983,10 +4289,6 @@
true
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -4996,8 +4298,8 @@
Objects of class <code>seconds</code>
can be used to represent a count of seconds. Class <code>seconds</code> shall be
a duration type ([time.duration.requirements]). For the sake of exposition, the
-semantics of member functions is not described if they have the same apparent
-semantics as those specified by [time.duration.requirements].</p>
+semantics of member functions are not described if they have the same apparent
+semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
@@ -5037,10 +4339,6 @@
zero.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5055,10 +4353,6 @@
Copy construction.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5073,10 +4367,6 @@
second count converted to nanoseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5091,10 +4381,6 @@
second count converted to microseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5109,10 +4395,6 @@
second count converted to milliseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5127,10 +4409,6 @@
1
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5145,10 +4423,6 @@
1
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5163,10 +4437,6 @@
false
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5176,8 +4446,8 @@
Objects of class <code>minutes</code>
can be used to represent a count of minutes. Class <code>minutes</code> shall be
a duration type ([time.duration.requirements]). For the sake of exposition, the
-semantics of member functions is not described if they have the same apparent
-semantics as those specified by [time.duration.requirements].</p>
+semantics of member functions are not described if they have the same apparent
+semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
@@ -5218,10 +4488,6 @@
zero.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5236,10 +4502,6 @@
Copy construction.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5254,10 +4516,6 @@
minute count converted to nanoseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5272,10 +4530,6 @@
minute count converted to microseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5290,10 +4544,6 @@
minute count converted to milliseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5308,10 +4558,6 @@
minute count converted to seconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5326,10 +4572,6 @@
0
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5344,10 +4586,6 @@
60
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5362,10 +4600,6 @@
false
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5375,8 +4609,8 @@
Objects of class <code>hours</code>
can be used to represent a count of hours. Class <code>hours</code> shall be a
duration type ([time.duration.requirements]). For the sake of exposition, the
-semantics of member functions is not described if they have the same apparent
-semantics as those specified by [time.duration.requirements].</p>
+semantics of member functions are not described if they have the same apparent
+semantics as those specified for duration types.</p>
<blockquote>
<pre><code>
@@ -5417,10 +4651,6 @@
Construct<var>s</var> an object with a count of hours - default is zero.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5435,10 +4665,6 @@
Copy construction.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5453,15 +4679,10 @@
hour count converted to nanoseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
-<pre><code>
-operator microseconds() const
+<pre><code>operator microseconds() const
</code></pre>
<blockquote>
@@ -5471,15 +4692,10 @@
hour count converted to microseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
-<pre><code>
-operator milliseconds() const
+<pre><code>operator milliseconds() const
</code></pre>
<blockquote>
@@ -5489,10 +4705,6 @@
hour count converted to milliseconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5507,10 +4719,6 @@
hour count converted to seconds
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5525,10 +4733,6 @@
hour count converted to seconds.
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5543,10 +4747,6 @@
0
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5561,10 +4761,6 @@
3600
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
@@ -5579,10 +4775,6 @@
false
</dd>
-<dt>Throws:</dt>
-<dd>
-Nothing.
-</dd>
</dl>
</blockquote>
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