TLA  Line data    Source code

       1                 : //
       2                 : // Copyright (c) 2026 Michael Vandeberg
       3                 : //
       4                 : // Distributed under the Boost Software License, Version 1.0. (See accompanying
       5                 : // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
       6                 : //
       7                 : // Official repository: https://github.com/cppalliance/capy
       8                 : //
       9                 : 
      10                 : #ifndef BOOST_CAPY_DETAIL_QUITTER_STOPPED_HPP
      11                 : #define BOOST_CAPY_DETAIL_QUITTER_STOPPED_HPP
      12                 : 
      13                 : #include <boost/capy/detail/config.hpp>
      14                 : #include <boost/capy/error.hpp>
      15                 : 
      16                 : #include <system_error>
      17                 : 
      18                 : /* What a stopped quitter<T> throws when T cannot hold canceled (void,
      19                 :    or a plain T). It is a std::system_error with canceled, so callers
      20                 :    catch it as one. Its own type lets run_async's default_handler drop
      21                 :    a quitter's stop that escapes a task, while it still terminates on
      22                 :    any other exception, a real ECANCELED included. A handler that
      23                 :    catches it and throws a std::system_error copy loses the type.
      24                 :    The type is visible so that catch still matches a stop thrown from
      25                 :    another shared library in a hidden-visibility build. */
      26                 : 
      27                 : namespace boost {
      28                 : namespace capy {
      29                 : namespace detail {
      30                 : 
      31                 : struct BOOST_CAPY_SYMBOL_VISIBLE
      32                 :     quitter_stopped
      33                 :     : std::system_error
      34                 : {
      35 HIT          29 :     quitter_stopped()
      36              29 :         : std::system_error(make_error_code(error::canceled))
      37                 :     {
      38              29 :     }
      39                 : };
      40                 : 
      41                 : } // namespace detail
      42                 : } // namespace capy
      43                 : } // namespace boost
      44                 : 
      45                 : #endif