libs/outcome/doc/html/reference/aliases/default_policy.html

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  13   <div class="titlepage"><div><div><h1 style="clear: both"><code>default_policy&lt;T, EC, EP&gt;</code></h1></div></div></div>
  14   <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>
  15
  16 <ol>
  17 <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>
  18 .</p></li>
  19
  20 <li><p>If <a href="../../reference/traits/is_error_code_available.html" class="api-reference"><code>is_error_code_available&lt;T&gt;</code></a>
  21  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&lt;T, EC, EP&gt;</code></a>
  22  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&lt;T, EC, void&gt;</code></a>
  23  for <code>basic_result</code>.</p></li>
  24
  25 <li><p>If <a href="../../reference/traits/is_exception_ptr_available.html" class="api-reference"><code>is_exception_ptr_available&lt;T&gt;</code></a>
  26  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&lt;T, EC, EP&gt;</code></a>
  27  for <code>basic_outcome</code> or <a href="../../reference/policies/exception_ptr_rethrow_result.html" class="api-reference"><code>exception_ptr_rethrow&lt;T, EC, void&gt;</code></a>
  28  for <code>basic_result</code>.</p></li>
  29
  30 <li><p>Else choose <a href="../../reference/policies/fail_to_compile_observers.html" class="api-reference"><code>fail_to_compile_observers</code></a>
  31 , which fails the build with a useful message.</p></li>
  32 </ol>
  33
  34 <p><em>Namespace</em>: <code>BOOST_OUTCOME_V2_NAMESPACE::policy</code></p>
  35
  36 <p><em>Header</em>: <code>&lt;boost/outcome/std_result.hpp&gt;</code></p>
  37
  38
  39         </div><p><small>Last revised: February 05, 2019 at 21:41:47 UTC</small></p>
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