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46 lines
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<title>default_policy<T, EC, EP> - Boost.Outcome documentation</title>
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<div class="titlepage"><div><div><h1 style="clear: both"><code>default_policy<T, EC, EP></code></h1></div></div></div>
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<p>A type alias to a no-value policy selected based on traits matching of <code>T</code>, <code>EC</code> and <code>EP</code>. It is defined as follows:</p>
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<ol>
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<li><p>If <code>EC</code> and <code>EP</code> is <code>void</code>, choose <a href="../../reference/policies/terminate.html" class="api-reference"><code>terminate</code></a>
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.</p></li>
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<li><p>If <a href="../../reference/traits/is_error_code_available.html" class="api-reference"><code>is_error_code_available<T></code></a>
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true for <code>EC</code>, choose <a href="../../reference/policies/error_code_throw_as_system_error_outcome.html" class="api-reference"><code>error_code_throw_as_system_error<T, EC, EP></code></a>
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for <code>basic_outcome</code> or <a href="../../reference/policies/error_code_throw_as_system_error_result.html" class="api-reference"><code>error_code_throw_as_system_error<T, EC, void></code></a>
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for <code>basic_result</code>.</p></li>
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<li><p>If <a href="../../reference/traits/is_exception_ptr_available.html" class="api-reference"><code>is_exception_ptr_available<T></code></a>
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true for <code>EC</code> or <code>EP</code>, choose <a href="../../reference/policies/exception_ptr_rethrow_outcome.html" class="api-reference"><code>exception_ptr_rethrow<T, EC, EP></code></a>
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for <code>basic_outcome</code> or <a href="../../reference/policies/exception_ptr_rethrow_result.html" class="api-reference"><code>exception_ptr_rethrow<T, EC, void></code></a>
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for <code>basic_result</code>.</p></li>
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<li><p>Else choose <a href="../../reference/policies/fail_to_compile_observers.html" class="api-reference"><code>fail_to_compile_observers</code></a>
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, which fails the build with a useful message.</p></li>
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</ol>
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<p><em>Namespace</em>: <code>BOOST_OUTCOME_V2_NAMESPACE::policy</code></p>
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<p><em>Header</em>: <code><boost/outcome/std_result.hpp></code></p>
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</div><p><small>Last revised: February 05, 2019 at 21:41:47 UTC</small></p>
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