mirror of http://192.168.1.51:8099/lmh188/twain3.0
331 lines
20 KiB
C++
331 lines
20 KiB
C++
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/* Try operation macros
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(C) 2017-2020 Niall Douglas <http://www.nedproductions.biz/> (20 commits)
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File Created: July 2017
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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_TRY_HPP
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#define BOOST_OUTCOME_TRY_HPP
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#include "success_failure.hpp"
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BOOST_OUTCOME_V2_NAMESPACE_BEGIN
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namespace detail
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{
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struct has_value_overload
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{
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};
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struct as_failure_overload
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{
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};
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struct assume_error_overload
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{
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};
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struct error_overload
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{
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};
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struct assume_value_overload
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{
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};
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struct value_overload
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{
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};
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BOOST_OUTCOME_TEMPLATE(class T, class R = decltype(std::declval<T>().as_failure()))
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(BOOST_OUTCOME_V2_NAMESPACE::is_failure_type<R>))
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constexpr inline bool has_as_failure(int /*unused */) { return true; }
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template <class T> constexpr inline bool has_as_failure(...) { return false; }
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TEXPR(std::declval<T>().assume_error()))
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constexpr inline bool has_assume_error(int /*unused */) { return true; }
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template <class T> constexpr inline bool has_assume_error(...) { return false; }
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TEXPR(std::declval<T>().error()))
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constexpr inline bool has_error(int /*unused */) { return true; }
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template <class T> constexpr inline bool has_error(...) { return false; }
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TEXPR(std::declval<T>().assume_value()))
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constexpr inline bool has_assume_value(int /*unused */) { return true; }
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template <class T> constexpr inline bool has_assume_value(...) { return false; }
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TEXPR(std::declval<T>().value()))
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constexpr inline bool has_value(int /*unused */) { return true; }
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template <class T> constexpr inline bool has_value(...) { return false; }
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} // namespace detail
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TEXPR(std::declval<T>().has_value()))
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constexpr inline bool try_operation_has_value(T &&v, detail::has_value_overload = {})
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{
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return v.has_value();
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(detail::has_as_failure<T>(5)))
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constexpr inline decltype(auto) try_operation_return_as(T &&v, detail::as_failure_overload = {})
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{
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return static_cast<T &&>(v).as_failure();
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(!detail::has_as_failure<T>(5) && detail::has_assume_error<T>(5)))
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constexpr inline decltype(auto) try_operation_return_as(T &&v, detail::assume_error_overload = {})
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{
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return failure(static_cast<T &&>(v).assume_error());
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(!detail::has_as_failure<T>(5) && !detail::has_assume_error<T>(5) && detail::has_error<T>(5)))
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constexpr inline decltype(auto) try_operation_return_as(T &&v, detail::error_overload = {})
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{
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return failure(static_cast<T &&>(v).error());
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(detail::has_assume_value<T>(5)))
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constexpr inline decltype(auto) try_operation_extract_value(T &&v, detail::assume_value_overload = {})
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{
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return static_cast<T &&>(v).assume_value();
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}
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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BOOST_OUTCOME_TEMPLATE(class T)
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BOOST_OUTCOME_TREQUIRES(BOOST_OUTCOME_TPRED(!detail::has_assume_value<T>(5) && detail::has_value<T>(5)))
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constexpr inline decltype(auto) try_operation_extract_value(T &&v, detail::value_overload = {})
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{
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return static_cast<T &&>(v).value();
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}
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BOOST_OUTCOME_V2_NAMESPACE_END
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#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ >= 8
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wparentheses"
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#endif
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#define BOOST_OUTCOME_TRY_GLUE2(x, y) x##y
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#define BOOST_OUTCOME_TRY_GLUE(x, y) BOOST_OUTCOME_TRY_GLUE2(x, y)
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#define BOOST_OUTCOME_TRY_UNIQUE_NAME BOOST_OUTCOME_TRY_GLUE(_outcome_try_unique_name_temporary, __COUNTER__)
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#define BOOST_OUTCOME_TRY_RETURN_ARG_COUNT(_1_, _2_, _3_, _4_, _5_, _6_, _7_, _8_, count, ...) count
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#define BOOST_OUTCOME_TRY_EXPAND_ARGS(args) BOOST_OUTCOME_TRY_RETURN_ARG_COUNT args
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#define BOOST_OUTCOME_TRY_COUNT_ARGS_MAX8(...) BOOST_OUTCOME_TRY_EXPAND_ARGS((__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0))
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#define BOOST_OUTCOME_TRY_OVERLOAD_MACRO2(name, count) name##count
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#define BOOST_OUTCOME_TRY_OVERLOAD_MACRO1(name, count) BOOST_OUTCOME_TRY_OVERLOAD_MACRO2(name, count)
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#define BOOST_OUTCOME_TRY_OVERLOAD_MACRO(name, count) BOOST_OUTCOME_TRY_OVERLOAD_MACRO1(name, count)
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#define BOOST_OUTCOME_TRY_OVERLOAD_GLUE(x, y) x y
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#define BOOST_OUTCOME_TRY_CALL_OVERLOAD(name, ...) \
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BOOST_OUTCOME_TRY_OVERLOAD_GLUE(BOOST_OUTCOME_TRY_OVERLOAD_MACRO(name, BOOST_OUTCOME_TRY_COUNT_ARGS_MAX8(__VA_ARGS__)), (__VA_ARGS__))
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#ifndef BOOST_OUTCOME_TRY_LIKELY
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#if defined(__clang__) || defined(__GNUC__)
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#define BOOST_OUTCOME_TRY_LIKELY(expr) (__builtin_expect(!!(expr), true))
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#else
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#define BOOST_OUTCOME_TRY_LIKELY(expr) (expr)
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#endif
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#endif
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// Use if(!expr); else as some compilers assume else clauses are always unlikely
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#define BOOST_OUTCOME_TRYV2_SUCCESS_LIKELY(unique, ...) \
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auto &&unique = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(unique))) \
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; \
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else \
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return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_TRY2_SUCCESS_LIKELY(unique, v, ...) \
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BOOST_OUTCOME_TRYV2_SUCCESS_LIKELY(unique, __VA_ARGS__); \
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auto &&v = BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_TRYV2_FAILURE_LIKELY(unique, ...) \
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auto &&unique = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(!BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(unique))) \
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return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_TRY2_FAILURE_LIKELY(unique, v, ...) \
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BOOST_OUTCOME_TRYV2_FAILURE_LIKELY(unique, __VA_ARGS__); \
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auto &&v = BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_CO_TRYV2_SUCCESS_LIKELY(unique, ...) \
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auto &&unique = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(unique))) \
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; \
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else \
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co_return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_CO_TRY2_SUCCESS_LIKELY(unique, v, ...) \
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BOOST_OUTCOME_CO_TRYV2_SUCCESS_LIKELY(unique, __VA_ARGS__); \
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auto &&v = BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_CO_TRYV2_FAILURE_LIKELY(unique, ...) \
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auto &&unique = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(!BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(unique))) \
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co_return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(unique) &&>(unique))
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#define BOOST_OUTCOME_CO_TRY2_FAILURE_LIKELY(unique, v, ...) \
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BOOST_OUTCOME_CO_TRYV2_FAILURE_LIKELY(unique, __VA_ARGS__); \
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auto &&v = BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(unique) &&>(unique))
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRYV(...) BOOST_OUTCOME_TRYV2_SUCCESS_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRYV_FAILURE_LIKELY(...) BOOST_OUTCOME_TRYV2_FAILURE_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRYV(...) BOOST_OUTCOME_CO_TRYV2_SUCCESS_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRYV_FAILURE_LIKELY(...) BOOST_OUTCOME_CO_TRYV2_FAILURE_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, __VA_ARGS__)
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#if defined(__GNUC__) || defined(__clang__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRYX(...) \
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({ \
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auto &&res = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(res))) \
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; \
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else \
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return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(res) &&>(res)); \
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BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(res) &&>(res)); \
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})
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRYX(...) \
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({ \
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auto &&res = (__VA_ARGS__); \
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if(BOOST_OUTCOME_TRY_LIKELY(BOOST_OUTCOME_V2_NAMESPACE::try_operation_has_value(res))) \
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; \
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else \
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co_return BOOST_OUTCOME_V2_NAMESPACE::try_operation_return_as(static_cast<decltype(res) &&>(res)); \
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BOOST_OUTCOME_V2_NAMESPACE::try_operation_extract_value(static_cast<decltype(res) &&>(res)); \
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})
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#endif
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRYA(v, ...) BOOST_OUTCOME_TRY2_SUCCESS_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, v, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRYA_FAILURE_LIKELY(v, ...) BOOST_OUTCOME_TRY2_FAILURE_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, v, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRYA(v, ...) BOOST_OUTCOME_CO_TRY2_SUCCESS_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, v, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(v, ...) BOOST_OUTCOME_CO_TRY2_FAILURE_LIKELY(BOOST_OUTCOME_TRY_UNIQUE_NAME, v, __VA_ARGS__)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY8(a, b, c, d, e, f, g, h) BOOST_OUTCOME_TRYA(a, b, c, d, e, f, g, h)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY7(a, b, c, d, e, f, g) BOOST_OUTCOME_TRYA(a, b, c, d, e, f, g)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY6(a, b, c, d, e, f) BOOST_OUTCOME_TRYA(a, b, c, d, e, f)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY5(a, b, c, d, e) BOOST_OUTCOME_TRYA(a, b, c, d, e)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY4(a, b, c, d) BOOST_OUTCOME_TRYA(a, b, c, d)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY3(a, b, c) BOOST_OUTCOME_TRYA(a, b, c)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY2(a, b) BOOST_OUTCOME_TRYA(a, b)
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#define BOOST_OUTCOME_TRY_INVOKE_TRY1(a) BOOST_OUTCOME_TRYV(a)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRY(...) BOOST_OUTCOME_TRY_CALL_OVERLOAD(BOOST_OUTCOME_TRY_INVOKE_TRY, __VA_ARGS__)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY8(a, b, c, d, e, f, g, h) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c, d, e, f, g, h)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY7(a, b, c, d, e, f, g) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c, d, e, f, g)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY6(a, b, c, d, e, f) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c, d, e, f)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY5(a, b, c, d, e) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c, d, e)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY4(a, b, c, d) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c, d)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY3(a, b, c) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b, c)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY2(a, b) BOOST_OUTCOME_TRYA_FAILURE_LIKELY(a, b)
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY1(a) BOOST_OUTCOME_TRYV_FAILURE_LIKELY(a)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRY_FAILURE_LIKELY(...) BOOST_OUTCOME_TRY_CALL_OVERLOAD(BOOST_OUTCOME_TRY_FAILURE_LIKELY_INVOKE_TRY, __VA_ARGS__)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY8(a, b, c, d, e, f, g, h) BOOST_OUTCOME_CO_TRYA(a, b, c, d, e, f, g, h)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY7(a, b, c, d, e, f, g) BOOST_OUTCOME_CO_TRYA(a, b, c, d, e, f, g)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY6(a, b, c, d, e, f) BOOST_OUTCOME_CO_TRYA(a, b, c, d, e, f)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY5(a, b, c, d, e) BOOST_OUTCOME_CO_TRYA(a, b, c, d, e)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY4(a, b, c, d) BOOST_OUTCOME_CO_TRYA(a, b, c, d)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY3(a, b, c) BOOST_OUTCOME_CO_TRYA(a, b, c)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY2(a, b) BOOST_OUTCOME_CO_TRYA(a, b)
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#define BOOST_OUTCOME_CO_TRY_INVOKE_TRY1(a) BOOST_OUTCOME_CO_TRYV(a)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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||
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_CO_TRY(...) BOOST_OUTCOME_TRY_CALL_OVERLOAD(BOOST_OUTCOME_CO_TRY_INVOKE_TRY, __VA_ARGS__)
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/*! AWAITING HUGO JSON CONVERSION TOOL
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||
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SIGNATURE NOT RECOGNISED
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*/
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#define BOOST_OUTCOME_TRY(...) BOOST_OUTCOME_TRY_CALL_OVERLOAD(BOOST_OUTCOME_TRY_INVOKE_TRY, __VA_ARGS__)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY8(a, b, c, d, e, f, g, h) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c, d, e, f, g, h)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY7(a, b, c, d, e, f, g) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c, d, e, f, g)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY6(a, b, c, d, e, f) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c, d, e, f)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY5(a, b, c, d, e) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c, d, e)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY4(a, b, c, d) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c, d)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY3(a, b, c) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b, c)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY2(a, b) BOOST_OUTCOME_CO_TRYA_FAILURE_LIKELY(a, b)
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#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY1(a) BOOST_OUTCOME_CO_TRYV_FAILURE_LIKELY(a)
|
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|
/*! AWAITING HUGO JSON CONVERSION TOOL
|
||
|
SIGNATURE NOT RECOGNISED
|
||
|
*/
|
||
|
#define BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY(...) BOOST_OUTCOME_TRY_CALL_OVERLOAD(BOOST_OUTCOME_CO_TRY_FAILURE_LIKELY_INVOKE_TRY, __VA_ARGS__)
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|
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|
#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ >= 8
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||
|
#pragma GCC diagnostic pop
|
||
|
#endif
|
||
|
|
||
|
#endif
|