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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_units.ReleaseNotes"></a><a class="link" href="ReleaseNotes.html" title="Release Notes">Release Notes</a>
</h2></div></div></div>
<p>
1.2 (March 2010)
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Added autoprefix ready for Boost 1.43
</li></ul></div>
<p>
1.0.0 (August 1, 2008) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Initial release with Boost 1.36
</li></ul></div>
<p>
0.7.1 (March 14, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Boost.Typeof emulation support.
</li>
<li class="listitem">
attempting to rebind a heterogeneous_system to a different set of dimensions
now fails.
</li>
<li class="listitem">
cmath.hpp now works with como-win32.
</li>
<li class="listitem">
minor changes to the tests and examples to make msvc 7.1 happy.
</li>
</ul></div>
<p>
0.7.0 (March 13, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
heterogeneous and mixed system functionality added.
</li>
<li class="listitem">
added fine-grained implicit unit conversion on a per fundamental dimension
basis.
</li>
<li class="listitem">
added a number of utility metafunction classes and predicates.
</li>
<li class="listitem">
<code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.operators_hpp" title="Header <boost/units/operators.hpp>">boost/units/operators.hpp</a></code>
now uses <code class="computeroutput"><span class="identifier">BOOST_TYPEOF</span></code> when
possible.
</li>
<li class="listitem">
angular units added in <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.systems.angle.gradians_hpp" title="Header <boost/units/systems/angle/gradians.hpp>">boost/units/systems/angle/gradians.hpp</a></code>
and <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.systems.angle.gradians_hpp" title="Header <boost/units/systems/angle/gradians.hpp>">boost/units/systems/angle/gradians.hpp</a></code>.
Implicit conversion of radians between trigonometric, SI, and CGS systems
is allowed.
</li>
<li class="listitem">
a variety of <span class="underline"><code class="computeroutput"><a class="link" href="../boost/units/unit.html" title="Class template unit">unit</a></code></span>
and <span class="underline"><code class="computeroutput"><a class="link" href="../boost/units/quantity.html" title="Class template quantity">quantity</a></code></span>
tests added.
</li>
<li class="listitem">
examples now provide self-tests.
</li>
</ul></div>
<p>
0.6.2 (February 22, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
changed template order in <code class="computeroutput"><span class="identifier">unit</span></code>
so dimension precedes unit system
</li>
<li class="listitem">
added <code class="computeroutput"><span class="identifier">homogeneous_system</span><span class="special"><</span><span class="identifier">S</span><span class="special">></span></code> for unit systems
</li>
<li class="listitem">
incorporated changes to <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.dimension_hpp" title="Header <boost/units/dimension.hpp>">boost/units/dimension.hpp</a></code>
(compile-time sorting by predicate), <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.conversion_hpp" title="Header <boost/units/conversion.hpp>">boost/units/conversion.hpp</a></code>
(thread-safe implementation of quantity conversions), and <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.io_hpp" title="Header <boost/units/io.hpp>">boost/units/io.hpp</a></code>
(now works with any <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span></code>)
by SW
</li>
<li class="listitem">
added abstract units in <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.systems.abstract_hpp" title="Header <boost/units/systems/abstract.hpp>">boost/units/systems/abstract.hpp</a></code>
to allow abstract dimensional analysis
</li>
<li class="listitem">
new example demonstrating implementation of code based on requirements
from Michael Fawcett (<a href="../../../libs/units/example/radar_beam_height.cpp" target="_top">radar_beam_height.cpp</a>)
</li>
</ul></div>
<p>
0.6.1 (February 13, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
added metafunctions to test if a type is
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
a valid dimension list (<code class="computeroutput"><span class="identifier">is_dimension_list</span><span class="special"><</span><span class="identifier">D</span><span class="special">></span></code>)
</li>
<li class="listitem">
a unit (<code class="computeroutput"><span class="identifier">is_unit</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code>
and <code class="computeroutput"><span class="identifier">is_unit_of_system</span><span class="special"><</span><span class="identifier">U</span><span class="special">,</span><span class="identifier">System</span><span class="special">></span></code>)
</li>
<li class="listitem">
a quantity (<code class="computeroutput"><span class="identifier">is_quantity</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code> and <code class="computeroutput"><span class="identifier">is_quantity_of_system</span><span class="special"><</span><span class="identifier">Q</span><span class="special">,</span><span class="identifier">System</span><span class="special">></span></code>)
</li>
</ul></div>
</li>
<li class="listitem">
quantity conversion factor is now computed at compile time
</li>
<li class="listitem">
static constants now avoid ODR problems
</li>
<li class="listitem">
unit_example_14.cpp now uses Boost.Timer
</li>
<li class="listitem">
numerous minor fixes suggested by SW
</li>
</ul></div>
<p>
0.6.0 (February 8, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
incorporated Steven Watanabe's optimized code for dimension.hpp, leading
to <span class="bold"><strong>dramatic</strong></span> decreases in compilation time
(nearly a factor of 10 for unit_example_4.cpp in my tests).
</li></ul></div>
<p>
0.5.8 (February 7, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
fixed <code class="computeroutput"><span class="preprocessor">#include</span></code> in <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.systems.si.base_hpp" title="Header <boost/units/systems/si/base.hpp>">boost/units/systems/si/base.hpp</a></code>
(thanks to Michael Fawcett and Steven Watanabe)
</li>
<li class="listitem">
removed references to obsolete <code class="computeroutput"><span class="identifier">base_type</span></code>
in <span class="underline">__unit_info</span> (thanks to Michael
Fawcett)
</li>
<li class="listitem">
moved functions in <code class="computeroutput"><a class="link" href="Reference.html#header.boost.units.cmath_hpp" title="Header <boost/units/cmath.hpp>">boost/units/cmath.hpp</a></code>
into <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">units</span></code> namespace (thanks to Steven Watanabe)
</li>
<li class="listitem">
fixed <code class="computeroutput"><span class="preprocessor">#include</span></code> guards
to be consistently named <code class="computeroutput"><span class="identifier">BOOST_UNITS_XXX</span></code>
(thanks to Steven Watanabe)
</li>
</ul></div>
<p>
0.5.7 (February 5, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
changed quantity conversion helper to increase flexibility
</li>
<li class="listitem">
minor documentation changes
</li>
<li class="listitem">
submitted for formal review as a Boost library
</li>
</ul></div>
<p>
0.5.6 (January 22, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
added IEEE 1541 standard binary prefixes along with SI prefixes to and
extended algebra of <code class="computeroutput"><span class="identifier">scale</span></code>
and <code class="computeroutput"><span class="identifier">scaled_value</span></code> classes
(thanks to Kevin Lynch)
</li>
<li class="listitem">
split SI units into separate header files to minimize the "kitchen
sink" include problem (thanks to Janek Kozicki)
</li>
<li class="listitem">
added convenience classes for declaring fundamental dimensions and composite
dimensions with integral powers (<code class="computeroutput"><span class="identifier">fundamental_dimension</span></code>
and <code class="computeroutput"><span class="identifier">composite_dimension</span></code>
respectively)
</li>
</ul></div>
<p>
0.5.5 (January 18, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
template parameter order in <code class="computeroutput"><span class="identifier">quantity</span></code>
switched and default <code class="computeroutput"><span class="identifier">value_type</span></code>
of <code class="computeroutput"><span class="keyword">double</span></code> added (thanks to
Andrey Semashev and Paul Bristow)
</li>
<li class="listitem">
added implicit <code class="computeroutput"><span class="identifier">value_type</span></code>
conversion where allowed (thanks to Andrey Semashev)
</li>
<li class="listitem">
added <code class="computeroutput"><span class="identifier">quantity_cast</span></code> for
three cases (thanks to Andrey Semashev):
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
constructing <code class="computeroutput"><span class="identifier">quantity</span></code>
from raw <code class="computeroutput"><span class="identifier">value_type</span></code>
</li>
<li class="listitem">
casting from one <code class="computeroutput"><span class="identifier">value_type</span></code>
to another
</li>
<li class="listitem">
casting from one <code class="computeroutput"><span class="identifier">unit</span></code>
to another (where conversion is allowed)
</li>
</ul></div>
</li>
<li class="listitem">
added<code class="computeroutput"> <span class="identifier">metre</span></code> and <code class="computeroutput"><span class="identifier">metres</span></code> and related constants to the SI
system for the convenience of our Commonwealth friends...
</li>
</ul></div>
<p>
0.5.4 (January 12, 2007) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
completely reimplemented unit conversion to allow for arbitrary unit conversions
between systems
</li>
<li class="listitem">
strict quantity construction is default; quantities can be constructed
from bare values by using static member <code class="computeroutput"><span class="identifier">from_value</span></code>
</li>
</ul></div>
<p>
0.5.3 (December 12, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
added Boost.Serialization support to <code class="computeroutput"><span class="identifier">unit</span></code>
and <code class="computeroutput"><span class="identifier">quantity</span></code> classes
</li>
<li class="listitem">
added option to enforce strict construction of quantities (only constructible
by multiplication of scalar by unit or quantity by unit) by preprocessor
<code class="computeroutput"><span class="identifier">MCS_STRICT_QUANTITY_CONSTRUCTION</span></code>
switch
</li>
</ul></div>
<p>
0.5.2 (December 4, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
added <code class="computeroutput"><span class="special"><</span><span class="identifier">cmath</span><span class="special">></span></code> wrappers in the <code class="computeroutput"><span class="identifier">std</span></code>
namespace for functions that can support quantities
</li></ul></div>
<p>
0.5.1 (November 3, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
converted to Boost Software License
</li>
<li class="listitem">
boostified directory structure and file paths
</li>
</ul></div>
<p>
0.5 (November 2, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
completely reimplemented SI and CGS unit systems and changed syntax for
quantities
</li>
<li class="listitem">
significantly streamlined <code class="computeroutput"><span class="identifier">pow</span></code>
and <code class="computeroutput"><span class="identifier">root</span></code> so for most applications
it is only necessary to define <code class="computeroutput"><span class="identifier">power_typeof_helper</span></code>
and <code class="computeroutput"><span class="identifier">root_typeof_helper</span></code>
to gain this functionality
</li>
<li class="listitem">
added a selection of physical constants from the CODATA tables
</li>
<li class="listitem">
added a skeleton <code class="computeroutput"><span class="identifier">complex</span></code>
class that correctly supports both <code class="computeroutput"><span class="identifier">complex</span><span class="special"><</span><span class="identifier">quantity</span><span class="special"><</span><span class="identifier">Y</span><span class="special">,</span><span class="identifier">Unit</span><span class="special">></span> <span class="special">></span></code>
and <code class="computeroutput"><span class="identifier">quantity</span><span class="special"><</span><span class="identifier">complex</span><span class="special"><</span><span class="identifier">Y</span><span class="special">>,</span><span class="identifier">Unit</span><span class="special">></span></code>
as an example
</li>
<li class="listitem">
investigate using Boost.Typeof for compilers that do not support <code class="computeroutput"><span class="identifier">typeof</span></code>
</li>
</ul></div>
<p>
0.4 (October 13, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<code class="computeroutput"><span class="identifier">pow</span><span class="special"><</span><span class="identifier">R</span><span class="special">></span></code>
and <code class="computeroutput"><span class="identifier">root</span><span class="special"><</span><span class="identifier">R</span><span class="special">></span></code>
improved for user-defined types
</li>
<li class="listitem">
added unary + and unary - operators
</li>
<li class="listitem">
added new example of interfacing with <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">quaternion</span></code>
</li>
<li class="listitem">
added optional preprocessor switch to enable implicit unit conversions
(<code class="computeroutput"><span class="identifier">BOOST_UNITS_ENABLE_IMPLICIT_UNIT_CONVERSIONS</span></code>)
</li>
</ul></div>
<p>
0.3 (September 6, 2006) :
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Support for <code class="computeroutput"><span class="identifier">op</span><span class="special">(</span><span class="identifier">X</span> <span class="identifier">x</span><span class="special">,</span><span class="identifier">Y</span> <span class="identifier">y</span><span class="special">)</span></code> for g++ added. This is automatically active
when compiling with gcc and can be optionally enabled by defining the preprocessor
constant <code class="computeroutput"><span class="identifier">BOOST_UNITS_HAS_TYPEOF</span></code>
</li></ul></div>
<p>
0.2 (September 4, 2006) : Second alpha release based on slightly modified code
from 0.1 release
</p>
<p>
0.1 (December 13, 2003) : written as a Boost demonstration of MPL-based dimensional
analysis in 2003.
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2003-2008 Matthias Christian Schabel<br>Copyright © 2007-2010 Steven
Watanabe<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
</tr></table>
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