85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* Proposed SG14 status_code
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(C) 2018-2022 Niall Douglas <http://www.nedproductions.biz/> (5 commits)
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File Created: Feb 2018
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#ifndef BOOST_OUTCOME_SYSTEM_ERROR2_IOSTREAM_SUPPORT_HPP
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#define BOOST_OUTCOME_SYSTEM_ERROR2_IOSTREAM_SUPPORT_HPP
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#include "error.hpp"
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#include <ostream>
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BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE_BEGIN
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/*! Print the status code to a `std::ostream &`.
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Requires that `DomainType::value_type` implements an `operator<<` overload for `std::ostream`.
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*/
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BOOST_OUTCOME_SYSTEM_ERROR2_TEMPLATE(class DomainType) //
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BOOST_OUTCOME_SYSTEM_ERROR2_TREQUIRES(BOOST_OUTCOME_SYSTEM_ERROR2_TPRED(std::is_same<std::ostream, typename std::decay<decltype(std::declval<std::ostream>() << std::declval<typename status_code<DomainType>::value_type>())>::type>::value)) inline std::ostream &operator<<(std::ostream &s, const status_code<DomainType> &v)
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{
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if(v.empty())
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{
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return s << "(empty)";
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}
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return s << v.domain().name().c_str() << ": " << v.value();
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}
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/*! Print a status code domain's `string_ref` to a `std::ostream &`.
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*/
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inline std::ostream &operator<<(std::ostream &s, const status_code_domain::string_ref &v)
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{
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return s << v.c_str();
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}
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/*! Print the erased status code to a `std::ostream &`.
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*/
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template <class ErasedType> inline std::ostream &operator<<(std::ostream &s, const status_code<erased<ErasedType>> &v)
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{
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if(v.empty())
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{
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return s << "(empty)";
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}
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return s << v.domain().name() << ": " << v.message();
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}
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/*! Print the generic code to a `std::ostream &`.
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*/
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inline std::ostream &operator<<(std::ostream &s, const generic_code &v)
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{
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if(v.empty())
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{
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return s << "(empty)";
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}
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return s << v.domain().name() << ": " << v.message();
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}
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BOOST_OUTCOME_SYSTEM_ERROR2_NAMESPACE_END
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#endif
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