123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/***
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Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: auTryConstruct.hpp
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Date: 2022-3-25
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Author: Reece
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***/
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#pragma once
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#define _AU_TRYCONTRUST_CHECKCODE AU_TEMPLATE_ENABLE_WHEN(AuIsBaseOf_v<AuCtorErrorTag, CtorCode_t>)
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template <class T, class CtorCode_t = AuCtorCode_t, typename ... Args, _AU_TRYCONTRUST_CHECKCODE>
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inline T AuTryConstruct(CtorCode_t &status, Args&& ... args)
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{
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if constexpr (AuIsConstructible_v<T, CtorCode_t &, Args ...>)
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{
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status = CtorCode_t::Failed();
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return T(AuReference(status), AuForward<Args>(args)...);
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}
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else if constexpr (AuIsConstructible_v<T, Args ..., CtorCode_t &>)
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{
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status = CtorCode_t::Failed();
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return T(AuForward<Args>(args)..., AuReference(status));
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}
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else
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{
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try
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{
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status = CtorCode_t::Success();
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return T(AuForward<Args>(args)...);
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}
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catch (...)
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{
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status = CtorCode_t::Failed();
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return T();
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}
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}
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}
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template <class T, class CtorCode_t = AuCtorCode_t, typename ... Args, _AU_TRYCONTRUST_CHECKCODE>
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inline CtorCode_t AuTryConstruct(T &ref, Args&& ... args)
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{
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CtorCode_t status;
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if constexpr (AuIsConstructible_v<T, CtorCode_t &, Args ...>)
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{
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ref = AuMove(T(AuReference(status), AuForward<Args>(args)...));
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return status;
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}
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else if constexpr (AuIsConstructible_v<T, Args ..., CtorCode_t &>)
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{
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ref = AuMove(T(AuForward<Args>(args)..., AuReference(status)));
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return status;
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}
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else
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{
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try
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{
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ref = AuMove(T(AuForward<Args>(args)...));
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return CtorCode_t::Success();
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}
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catch (...)
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{
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ref = AuMove(T());
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return CtorCode_t::Failed();
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}
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}
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}
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template <class T, class CtorCode_t = AuCtorCode_t, typename ... Args, _AU_TRYCONTRUST_CHECKCODE>
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inline AuPair<CtorCode_t, T> AuTryConstructPair(Args&& ... args)
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{
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CtorCode_t code;
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T object = AuTryConstruct<T, CtorCode_t, Args...>(AuReference(code), AuForward<Args>(args)...);
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return AuMakePair(AuMove(code), AuMove(object));
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}
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template <class T, class CtorCode_t = AuCtorCode_t, typename ... Args, _AU_TRYCONTRUST_CHECKCODE>
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inline T AuTryConstructWithDefault(CtorCode_t &status, T &&def, Args&& ... args)
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{
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if constexpr (AuIsConstructible_v<T, CtorCode_t &, Args ...>)
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{
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status = CtorCode_t::Failed();
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T returnValue = T(AuReference(status), AuForward<Args>(args)...);
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if (!status)
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{
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return AuMove(def);
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}
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return returnValue;
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}
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else if constexpr (AuIsConstructible_v<T, Args ..., CtorCode_t &>)
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{
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status = CtorCode_t::Failed();
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T returnValue = T(AuForward<Args>(args)..., AuReference(status));
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if (!status)
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{
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return AuMove(def);
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}
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return returnValue;
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}
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else
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{
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try
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{
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status = CtorCode_t::Success();
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return T(AuForward<Args>(args)...);
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}
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catch (...)
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{
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status = CtorCode_t::Failed();
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return AuMove(def);
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}
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}
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}
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template <class T, class CtorCode_t = AuCtorCode_t, typename ... Args, _AU_TRYCONTRUST_CHECKCODE>
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inline AuPair<CtorCode_t, T> AuTryConstructWithDefaultPair(T &&def, Args&& ... args)
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{
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CtorCode_t code;
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T object = AuTryConstructWithDefault<T, CtorCode_t, Args...>(AuReference(code), AuForward(def), AuForward<Args>(args)...);
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return AuMakePair(AuMove(code), AuMove(object));
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}
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#undef _AU_TRYCONTRUST_CHECKCODE |