Adds asio library and Storage Module

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Assign a new error value.
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<pre class="programlisting">void assign(
int v,
const error_category &amp; c);
</pre>
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Get the error category.
</p>
<pre class="programlisting">const error_category &amp; category() const;
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<p>
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Clear the error value to
the default.
</p>
<pre class="programlisting">void clear();
</pre>
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Default constructor.
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<pre class="programlisting"><a class="link" href="error_code/overload1.html" title="error_code::error_code (1 of 3 overloads)">error_code</a>();
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Construct with specific error code and category.
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int v,
const error_category &amp; c);
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Construct from an error code enum.
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<pre class="programlisting">template&lt;
typename ErrorEnum&gt;
<a class="link" href="error_code/overload3.html" title="error_code::error_code (3 of 3 overloads)">error_code</a>(
ErrorEnum e);
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Default constructor.
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<pre class="programlisting">error_code();
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<p>
Construct with specific error code and category.
</p>
<pre class="programlisting">error_code(
int v,
const error_category &amp; c);
</pre>
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<p>
Construct from an error code enum.
</p>
<pre class="programlisting">template&lt;
typename ErrorEnum&gt;
error_code(
ErrorEnum e);
</pre>
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<p>
<a class="indexterm" name="asio.indexterm.error_code.message"></a>
Get the message associated
with the error.
</p>
<pre class="programlisting">std::string message() const;
</pre>
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<p>
<a class="indexterm" name="asio.indexterm.error_code.operator_eq__eq_"></a>
Equality
operator to compare two error objects.
</p>
<pre class="programlisting">friend bool operator==(
const error_code &amp; e1,
const error_code &amp; e2);
</pre>
<h6>
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<span><a name="asio.reference.error_code.operator_eq__eq_.requirements"></a></span><a class="link" href="operator_eq__eq_.html#asio.reference.error_code.operator_eq__eq_.requirements">Requirements</a>
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<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/error_code.hpp</code>
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Operator to test
if the error represents success.
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<pre class="programlisting">bool operator!() const;
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<p>
<a class="indexterm" name="asio.indexterm.error_code.operator_not__eq_"></a>
Inequality
operator to compare two error objects.
</p>
<pre class="programlisting">friend bool operator!=(
const error_code &amp; e1,
const error_code &amp; e2);
</pre>
<h6>
<a name="asio.reference.error_code.operator_not__eq_.h0"></a>
<span><a name="asio.reference.error_code.operator_not__eq_.requirements"></a></span><a class="link" href="operator_not__eq_.html#asio.reference.error_code.operator_not__eq_.requirements">Requirements</a>
</h6>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/error_code.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
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<a class="indexterm" name="asio.indexterm.error_code.operator_unspecified_bool_type"></a>
Operator
returns non-null if there is a non-success error code.
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<pre class="programlisting">operator unspecified_bool_type() const;
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<span><a name="asio.reference.error_code.unspecified_bool_type.requirements"></a></span><a class="link" href="unspecified_bool_type.html#asio.reference.error_code.unspecified_bool_type.requirements">Requirements</a>
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<p>
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Get the error value.
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