From eb5d3e5df99de2c3d8da2e8bc7b12ed427465dba Mon Sep 17 00:00:00 2001
From: B Stack <bgstack15@gmail.com>
Date: Sun, 9 Sep 2018 18:53:23 -0400
Subject: pull in latest 10.4 from upstream

---
 zen/optional.h | 114 ---------------------------------------------------------
 1 file changed, 114 deletions(-)
 delete mode 100755 zen/optional.h

(limited to 'zen/optional.h')

diff --git a/zen/optional.h b/zen/optional.h
deleted file mode 100755
index e4605c5f..00000000
--- a/zen/optional.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// *****************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under    *
-// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0          *
-// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
-// *****************************************************************************
-
-#ifndef OPTIONAL_H_2857428578342203589
-#define OPTIONAL_H_2857428578342203589
-
-#include <type_traits>
-
-
-namespace zen
-{
-/*
-Optional return value without heap memory allocation!
- -> interface like a pointer, performance like a value
-
- Usage:
- ------
- Opt<MyEnum> someFunction();
-{
-   if (allIsWell)
-       return enumVal;
-   else
-       return NoValue();
-}
-
- Opt<MyEnum> optValue = someFunction();
- if (optValue)
-       ... use *optValue ...
-*/
-
-struct NoValue {};
-
-template <class T>
-class Opt
-{
-public:
-    Opt()        {}
-    Opt(NoValue) {}
-    Opt(const T& val) : valid_(true) { new (&rawMem_) T(val); } //throw X
-    Opt(     T&& tmp) : valid_(true) { new (&rawMem_) T(std::move(tmp)); }
-
-    Opt(const Opt& other) : valid_(other.valid_)
-    {
-        if (const T* val = other.get())
-            new (&rawMem_) T(*val); //throw X
-    }
-
-    ~Opt() { if (T* val = get()) val->~T(); }
-
-    Opt& operator=(const Opt& other) //strong exception-safety iff T::operator=() is strongly exception-safe
-    {
-        if (T* val = get())
-        {
-            if (const T* valOther = other.get())
-                *val = *valOther; //throw X
-            else
-            {
-                valid_ = false;
-                val->~T();
-            }
-        }
-        else if (const T* valOther = other.get())
-        {
-            new (&rawMem_) T(*valOther); //throw X
-            valid_ = true;
-        }
-        return *this;
-    }
-
-    Opt& operator=(NoValue) //support assignment to Opt<const T>
-    {
-        if (T* val = get())
-        {
-            valid_ = false;
-            val->~T();
-        }
-        return *this;
-    }
-
-    explicit operator bool() const { return valid_; } //thank you, C++11!!!
-
-    const T* get() const { return valid_ ? reinterpret_cast<const T*>(&rawMem_) : nullptr; }
-    T*       get()       { return valid_ ? reinterpret_cast<      T*>(&rawMem_) : nullptr; }
-
-    const T& operator*() const { return *get(); }
-    /**/  T& operator*()       { return *get(); }
-
-    const T* operator->() const { return get(); }
-    /**/  T* operator->()       { return get(); }
-
-private:
-    std::aligned_storage_t<sizeof(T), alignof(T)> rawMem_; //don't require T to be default-constructible!
-    bool valid_ = false;
-};
-
-
-template <class T> inline
-bool operator==(const Opt<T>& lhs, const Opt<T>& rhs)
-{
-    if (static_cast<bool>(lhs) != static_cast<bool>(rhs))
-        return false;
-    if (!lhs)
-        return true;
-    return *lhs == *rhs;
-}
-template <class T> inline
-bool operator!=(const Opt<T>& lhs, const Opt<T>& rhs) { return !(lhs == rhs); }
-
-}
-
-#endif //OPTIONAL_H_2857428578342203589
-- 
cgit