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<title>BOOST_&lt;level&gt;_NO_THROW</title>
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<div class="titlepage"><div><div><h4 class="title">
<a name="boost_test.utf_reference.testing_tool_ref.assertion_boost_level_no_throw"></a><a class="link" href="assertion_boost_level_no_throw.html" title="BOOST_&lt;level&gt;_NO_THROW"><code class="computeroutput"><span class="identifier">BOOST_</span><span class="special">&lt;</span><span class="identifier">level</span><span class="special">&gt;</span><span class="identifier">_NO_THROW</span></code></a>
</h4></div></div></div>
<pre class="programlisting"><span class="identifier">BOOST_WARN_NO_THROW</span><span class="special">(</span><span class="identifier">expression</span><span class="special">);</span>
<span class="identifier">BOOST_CHECK_NO_THROW</span><span class="special">(</span><span class="identifier">expression</span><span class="special">);</span>
<span class="identifier">BOOST_REQUIRE_NO_THROW</span><span class="special">(</span><span class="identifier">expression</span><span class="special">);</span>
</pre>
<p>
          These assertions validate that the execution of <code class="computeroutput"><span class="identifier">expression</span></code>
          does not throw any exception. To that extent, all possible exception are
          caught by assertion itself and no exception is propagated to the test body.
        </p>
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<td rowspan="2" align="center" valign="top" width="25"><img alt="[Tip]" src="../../../../../../../doc/src/images/tip.png"></td>
<th align="left">Tip</th>
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<tr><td align="left" valign="top"><p>
            It is possible to test for complex expressions with the use of constructs
            such as <code class="computeroutput"><span class="keyword">do</span> <span class="special">{</span>
            <span class="comment">/* ... */</span><span class="special">}</span>
            <span class="keyword">while</span><span class="special">(</span><span class="number">0</span><span class="special">)</span></code> block.
          </p></td></tr>
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<h6>
<a name="boost_test.utf_reference.testing_tool_ref.assertion_boost_level_no_throw.h0"></a>
          <span class="phrase"><a name="boost_test.utf_reference.testing_tool_ref.assertion_boost_level_no_throw.example_descr"></a></span><a class="link" href="assertion_boost_level_no_throw.html#boost_test.utf_reference.testing_tool_ref.assertion_boost_level_no_throw.example_descr">Example:
          BOOST_&lt;level&gt;_NO_THROW usage</a>
        </h6>
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<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="preprocessor">#define</span> <span class="identifier">BOOST_TEST_MODULE</span> <span class="identifier">example</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">test</span><span class="special">/</span><span class="identifier">included</span><span class="special">/</span><span class="identifier">unit_test</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="keyword">class</span> <span class="identifier">my_exception</span><span class="special">{};</span>

<span class="keyword">void</span> <span class="identifier">some_func</span><span class="special">(</span> <span class="keyword">int</span> <span class="identifier">i</span> <span class="special">)</span> <span class="special">{</span> <span class="keyword">if</span><span class="special">(</span> <span class="identifier">i</span><span class="special">&lt;</span><span class="number">0</span> <span class="special">)</span> <span class="keyword">throw</span> <span class="identifier">my_exception</span><span class="special">();</span> <span class="special">}</span>

<span class="identifier">BOOST_AUTO_TEST_CASE</span><span class="special">(</span> <span class="identifier">test</span> <span class="special">)</span>
<span class="special">{</span>
    <span class="identifier">BOOST_CHECK_NO_THROW</span><span class="special">(</span> <span class="identifier">some_func</span><span class="special">(-</span><span class="number">1</span><span class="special">)</span> <span class="special">);</span>
    <span class="identifier">BOOST_CHECK_NO_THROW</span><span class="special">(</span>
      <span class="keyword">do</span> <span class="special">{</span>
        <span class="keyword">int</span> <span class="identifier">i</span><span class="special">(-</span><span class="number">2</span><span class="special">);</span>
        <span class="identifier">some_func</span><span class="special">(</span><span class="identifier">i</span><span class="special">);</span>
      <span class="special">}</span> <span class="keyword">while</span><span class="special">(</span><span class="number">0</span><span class="special">)</span>
    <span class="special">);</span>
<span class="special">}</span>
</pre>
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<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="special">&gt;</span> <span class="identifier">example</span>
<span class="identifier">Running</span> <span class="number">1</span> <span class="identifier">test</span> <span class="keyword">case</span><span class="special">...</span>
<span class="special">../</span><span class="identifier">doc</span><span class="special">/</span><span class="identifier">examples</span><span class="special">/</span><span class="identifier">exception_nothrow</span><span class="special">.</span><span class="identifier">run</span><span class="special">-</span><span class="identifier">fail</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">18</span><span class="special">:</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"test"</span><span class="special">:</span> <span class="identifier">exception</span> <span class="identifier">thrown</span> <span class="identifier">by</span> <span class="identifier">some_func</span><span class="special">(-</span><span class="number">1</span><span class="special">)</span>
<span class="special">../</span><span class="identifier">doc</span><span class="special">/</span><span class="identifier">examples</span><span class="special">/</span><span class="identifier">exception_nothrow</span><span class="special">.</span><span class="identifier">run</span><span class="special">-</span><span class="identifier">fail</span><span class="special">.</span><span class="identifier">cpp</span><span class="special">:</span><span class="number">24</span><span class="special">:</span> <span class="identifier">error</span><span class="special">:</span> <span class="identifier">in</span> <span class="string">"test"</span><span class="special">:</span> <span class="identifier">exception</span> <span class="identifier">thrown</span> <span class="identifier">by</span> <span class="keyword">do</span> <span class="special">{</span> <span class="keyword">int</span> <span class="identifier">i</span><span class="special">(-</span><span class="number">2</span><span class="special">);</span> <span class="identifier">some_func</span><span class="special">(</span><span class="identifier">i</span><span class="special">);</span>
 <span class="special">}</span> <span class="keyword">while</span><span class="special">(</span><span class="number">0</span><span class="special">)</span>

<span class="special">***</span> <span class="number">2</span> <span class="identifier">failures</span> <span class="identifier">are</span> <span class="identifier">detected</span> <span class="identifier">in</span> <span class="identifier">the</span> <span class="identifier">test</span> <span class="identifier">module</span> <span class="string">"example"</span>
</pre>
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<p>
          See also:
        </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <a class="link" href="assertion_boost_level_throw.html" title="BOOST_&lt;level&gt;_THROW"><code class="computeroutput"><span class="identifier">BOOST_</span><span class="special">&lt;</span><span class="identifier">level</span><span class="special">&gt;</span><span class="identifier">_THROW</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="../../testing_tools/exception_correctness.html" title="Exception correctness">Exception
              correctness</a> section
            </li>
</ul></div>
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