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https://github.com/boostorg/leaf.git
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118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
// Copyright 2018-2023 Emil Dotchevski and Reverge Studios, Inc.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifdef BOOST_LEAF_TEST_SINGLE_HEADER
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# include "leaf.hpp"
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#else
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# include <boost/leaf/result.hpp>
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# include <boost/leaf/capture.hpp>
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# include <boost/leaf/context.hpp>
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#endif
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#if BOOST_LEAF_CFG_STD_STRING
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# include <sstream>
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# include <iostream>
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#endif
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#include "lightweight_test.hpp"
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namespace leaf = boost::leaf;
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struct non_printable_value
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{
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};
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struct e_err
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{
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template <class CharT, class Traits>
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friend std::ostream & operator<<( std::basic_ostream<CharT, Traits> & os, e_err const & )
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{
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return os << "e_err";
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}
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};
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int main()
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{
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{
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leaf::result<int> r = 42;
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BOOST_TEST(r);
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#if BOOST_LEAF_CFG_STD_STRING
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std::stringstream ss;
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ss << r;
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std::string s = ss.str();
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std::cout << s << std::endl;
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#if BOOST_LEAF_CFG_DIAGNOSTICS
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BOOST_TEST_EQ(s, "42");
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#endif
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#endif
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}
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{
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leaf::result<non_printable_value> r;
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BOOST_TEST(r);
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#if BOOST_LEAF_CFG_STD_STRING
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std::stringstream ss;
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ss << r;
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std::string s = ss.str();
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std::cout << s << std::endl;
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#if BOOST_LEAF_CFG_DIAGNOSTICS
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BOOST_TEST_EQ(s, "{not printable}");
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#endif
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#endif
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}
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{
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leaf::result<void> r;
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BOOST_TEST(r);
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#if BOOST_LEAF_CFG_STD_STRING
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std::stringstream ss;
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ss << r;
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std::string s = ss.str();
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std::cout << s << std::endl;
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#if BOOST_LEAF_CFG_DIAGNOSTICS
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BOOST_TEST_EQ(s, "No error");
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#endif
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#endif
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}
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{
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leaf::result<int> r = leaf::new_error(e_err{ });
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BOOST_TEST(!r);
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#if BOOST_LEAF_CFG_STD_STRING
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std::stringstream ss;
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ss << r;
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std::string s = ss.str();
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std::cout << s << std::endl;
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leaf::error_id err = r.error();
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#if BOOST_LEAF_CFG_DIAGNOSTICS
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BOOST_TEST_EQ(s, "Error ID " + std::to_string(err.value()));
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#endif
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#endif
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}
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#if BOOST_LEAF_CFG_CAPTURE
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{
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using context_type = leaf::leaf_detail::polymorphic_context_impl<leaf::context<e_err>>;
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{
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leaf::result<int> r = leaf::capture( std::make_shared<context_type>(), []{ return leaf::result<int>( leaf::new_error( e_err { } ) ); } );
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#if BOOST_LEAF_CFG_STD_STRING
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std::stringstream ss;
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ss << r;
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std::string s = ss.str();
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std::cout << s << std::endl;
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leaf::error_id err = r.error();
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BOOST_TEST_NE(s.find("Error ID " + std::to_string(err.value())), s.npos);
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#if BOOST_LEAF_CFG_DIAGNOSTICS
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BOOST_TEST_NE(s.find("captured error objects"), s.npos);
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BOOST_TEST_NE(s.find("e_err"), s.npos);
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#endif
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#endif
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}
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}
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#endif
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return boost::report_errors();
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}
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