update ceph source to reef 18.1.2

[ceph.git] / ceph / src / boost / libs / leaf / examples / print_half.cpp

diff --git a/ceph/src/boost/libs/leaf/examples/print_half.cpp b/ceph/src/boost/libs/leaf/examples/print_half.cpp
deleted file mode 100644 (file)
index 0e0ec36..0000000
--- a/ceph/src/boost/libs/leaf/examples/print_half.cpp
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright (c) 2018-2020 Emil Dotchevski and Reverge Studios, Inc.
-
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-// This program is an adaptation of the following Boost Outcome example:
-// https://github.com/ned14/outcome/blob/master/doc/src/snippets/using_result.cpp
-
-#include <boost/leaf/handle_errors.hpp>
-#include <boost/leaf/pred.hpp>
-#include <boost/leaf/result.hpp>
-#include <algorithm>
-#include <ctype.h>
-#include <string>
-#include <iostream>
-
-namespace leaf = boost::leaf;
-
-enum class ConversionErrc
-{
-    EmptyString = 1,
-    IllegalChar,
-    TooLong
-};
-
-leaf::result<int> convert(const std::string& str) noexcept
-{
-    if (str.empty())
-        return leaf::new_error(ConversionErrc::EmptyString);
-
-    if (!std::all_of(str.begin(), str.end(), ::isdigit))
-        return leaf::new_error(ConversionErrc::IllegalChar);
-
-    if (str.length() > 9)
-        return leaf::new_error(ConversionErrc::TooLong);
-
-    return atoi(str.c_str());
-}
-
-// Do not static_store BigInt to actually work -- it's a stub.
-struct BigInt
-{
-    static leaf::result<BigInt> fromString(const std::string& s) { return BigInt{s}; }
-    explicit BigInt(const std::string&) { }
-    BigInt half() const { return BigInt{""}; }
-    friend std::ostream& operator<<(std::ostream& o, const BigInt&) { return o << "big int half"; }
-};
-
-// This function handles ConversionErrc::TooLong errors, forwards any other error to the caller.
-leaf::result<void> print_half(const std::string& text)
-{
-    return leaf::try_handle_some(
-        [&]() -> leaf::result<void>
-        {
-            BOOST_LEAF_AUTO(r,convert(text));
-            std::cout << r / 2 << std::endl;
-            return { };
-        },
-        [&]( leaf::match<ConversionErrc, ConversionErrc::TooLong> ) -> leaf::result<void>
-        {
-            BOOST_LEAF_AUTO(i, BigInt::fromString(text));
-            std::cout << i.half() << std::endl;
-            return { };
-        } );
-}
-
-int main( int argc, char const * argv[] )
-{
-    return leaf::try_handle_all(
-        [&]() -> leaf::result<int>
-        {
-            BOOST_LEAF_CHECK( print_half(argc<2 ? "" : argv[1]) );
-            std::cout << "ok" << std::endl;
-            return 0;
-        },
-
-        []( leaf::match<ConversionErrc, ConversionErrc::EmptyString> )
-        {
-            std::cerr << "Empty string!" << std::endl;
-            return 1;
-        },
-
-        []( leaf::match<ConversionErrc, ConversionErrc::IllegalChar> )
-        {
-            std::cerr << "Illegal char!" << std::endl;
-            return 2;
-        },
-
-        []( leaf::error_info const & unmatched )
-        {
-            // This will never execute in this program, but it would detect logic errors where an unknown error reaches main.
-            // In this case, we print diagnostic information.
-            std::cerr <<
-                "Unknown failure detected" << std::endl <<
-                "Cryptic diagnostic information follows" << std::endl <<
-                unmatched;
-            return 3;
-        } );
-}
-
-////////////////////////////////////////
-
-#ifdef BOOST_LEAF_NO_EXCEPTIONS
-
-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();
-    }
-
-    struct source_location;
-    BOOST_LEAF_NORETURN void throw_exception( std::exception const & e, boost::source_location const & )
-    {
-        throw_exception(e);
-    }
-}
-
-#endif