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This commit is contained in:
Emil Dotchevski
2020-10-20 12:23:13 -07:00
parent c20262d1f8
commit 44eec77cf0
103 changed files with 15900 additions and 15900 deletions
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138
examples/error_trace.cpp
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@@ -26,24 +26,24 @@ namespace leaf = boost::leaf;
// The error trace is activated only if an error-handling scope provides a handler for e_error_trace.
struct e_error_trace
{
struct rec
{
char const * file;
int line;
friend std::ostream & operator<<( std::ostream & os, rec const & x )
{
return os << x.file << '(' << x.line << ')' << std::endl;
}
};
struct rec
{
char const * file;
int line;
friend std::ostream & operator<<( std::ostream & os, rec const & x )
{
return os << x.file << '(' << x.line << ')' << std::endl;
}
};
std::deque<rec> value;
std::deque<rec> value;
friend std::ostream & operator<<( std::ostream & os, e_error_trace const & tr )
{
for( auto & i : tr.value )
os << i;
return os;
}
friend std::ostream & operator<<( std::ostream & os, e_error_trace const & tr )
{
for( auto & i : tr.value )
os << i;
return os;
}
};
// The ERROR_TRACE macro is designed for use in functions that detect or forward errors
@@ -58,71 +58,71 @@ int const failure_percent = 25;
leaf::result<void> f1()
{
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return { };
else
return leaf::new_error();
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return { };
else
return leaf::new_error();
}
leaf::result<void> f2()
{
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f1();
else
return leaf::new_error();
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f1();
else
return leaf::new_error();
}
leaf::result<void> f3()
{
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f2();
else
return leaf::new_error();
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f2();
else
return leaf::new_error();
}
leaf::result<void> f4()
{
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f3();
else
return leaf::new_error();
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f3();
else
return leaf::new_error();
}
leaf::result<void> f5()
{
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f4();
else
return leaf::new_error();
ERROR_TRACE;
if( (std::rand()%100) > failure_percent )
return f4();
else
return leaf::new_error();
}
int main()
{
for( int i=0; i!=10; ++i )
leaf::try_handle_all(
[&]() -> leaf::result<void>
{
std::cout << "Run # " << i << ": ";
BOOST_LEAF_CHECK(f5());
std::cout << "Success!" << std::endl;
return { };
},
for( int i=0; i!=10; ++i )
leaf::try_handle_all(
[&]() -> leaf::result<void>
{
std::cout << "Run # " << i << ": ";
BOOST_LEAF_CHECK(f5());
std::cout << "Success!" << std::endl;
return { };
},
#if ENABLE_ERROR_TRACE // This single #if enables or disables the capturing of the error trace.
[]( e_error_trace const & tr )
{
std::cerr << "Error! Trace:" << std::endl << tr;
},
[]( e_error_trace const & tr )
{
std::cerr << "Error! Trace:" << std::endl << tr;
},
#endif
[]
{
std::cerr << "Error!" << std::endl;
} );
return 0;
[]
{
std::cerr << "Error!" << std::endl;
} );
return 0;
}
////////////////////////////////////////
@@ -131,17 +131,17 @@ int main()
namespace boost
{
BOOST_LEAF_NORETURN void throw_exception( std::exception const & e )
{
std::cerr << "Terminating due to a C++ exception under BOOST_LEAF_NO_EXCEPTIONS: " << e.what();
std::terminate();
}
BOOST_LEAF_NORETURN void throw_exception( std::exception const & e )
{
std::cerr << "Terminating due to a C++ exception under BOOST_LEAF_NO_EXCEPTIONS: " << e.what();
std::terminate();
}
struct source_location;
BOOST_LEAF_NORETURN void throw_exception( std::exception const & e, boost::source_location const & )
{
throw_exception(e);
}
struct source_location;
BOOST_LEAF_NORETURN void throw_exception( std::exception const & e, boost::source_location const & )
{
throw_exception(e);
}
}
#endif