ceph/src/boost/libs/leaf/test/BOOST_LEAF_CHECK_test.cpp

   1 // Copyright 2018-2022 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifdef BOOST_LEAF_TEST_SINGLE_HEADER
   7 #   include "leaf.hpp"
   8 #else
   9 #   include <boost/leaf/result.hpp>
  10 #   include <boost/leaf/handle_errors.hpp>
  11 #endif
  12
  13 #ifdef BOOST_LEAF_BOOST_AVAILABLE
  14 #   include <boost/config/workaround.hpp>
  15 #else
  16 #   define BOOST_WORKAROUND(a,b) 0
  17 #endif
  18
  19 #include "lightweight_test.hpp"
  20
  21 namespace leaf = boost::leaf;
  22
  23 struct value
  24 {
  25     int x;
  26
  27     explicit value( int x ): x(x) { };
  28
  29 #ifndef BOOST_LEAF_NO_CXX11_REF_QUALIFIERS
  30     value( value const & ) = delete;
  31     value( value && ) = default;
  32 #endif
  33 };
  34
  35 leaf::result<value> f1( bool success )
  36 {
  37     if( success )
  38         return value { 21 };
  39     else
  40         return leaf::new_error();
  41 }
  42
  43 #if BOOST_LEAF_GNUC_STMTEXPR
  44
  45 leaf::result<value> f2( bool success )
  46 {
  47     return value { BOOST_LEAF_CHECK(f1(success)).x + BOOST_LEAF_CHECK(f1(success)).x };
  48 }
  49
  50 #else
  51
  52 leaf::result<value> f2( bool success )
  53 {
  54     BOOST_LEAF_AUTO(a, f1(success));
  55     BOOST_LEAF_AUTO(b, f1(success));
  56     return value { a.x + b.x };
  57 }
  58
  59 #endif
  60
  61 leaf::result<void> f3( bool success )
  62 {
  63     BOOST_LEAF_CHECK(f2(success));
  64     return { };
  65 }
  66
  67 int main()
  68 {
  69     BOOST_TEST_EQ(f2(true).value().x, 42);
  70     BOOST_TEST(!f2(false));
  71     BOOST_TEST(f3(true));
  72     BOOST_TEST(!f3(false));
  73
  74     return boost::report_errors();
  75 }