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add operator= and ctor for result

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ToruNiina 2017-05-11 15:08:38 +09:00
parent f5d301016f
commit 855cbe5aff
1 changed files with 12 additions and 3 deletions
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15
toml/parser.hpp
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@ -27,13 +27,22 @@ struct result
result& operator=(const T& rhs){ok_ = true; value_ = rhs; return *this;} result& operator=(const T& rhs){ok_ = true; value_ = rhs; return *this;}
result& operator=(T&& rhs) {ok_ = true; value_ = rhs; return *this;} result& operator=(T&& rhs) {ok_ = true; value_ = rhs; return *this;}
template<typename U>
result& operator=(const result<U>& u) {ok_ = u.ok(); if(ok_)value_ = u.move(); return *this;}
template<typename U>
result& operator=(result<U>&& u) {ok_ = u.ok(); if(ok_)value_ = u.move(); return *this;}
template<typename U>
result(const result<U>& u): ok_(u.ok()){if(ok_)value_ = u.get();}
template<typename U>
result(result<U>&& u): ok_(u.ok()){if(ok_)value_ = u.move();}
bool ok() const {return ok_;} bool ok() const {return ok_;}
operator bool() const {return ok_;} operator bool() const {return ok_;}
T& get() {if(!ok_) throw std::logic_error("result"); return value_;} T& get() {if(!ok_) throw std::logic_error("result::get"); return value_;}
T const& get() const {if(!ok_) throw std::logic_error("result"); return value_;} T const& get() const {if(!ok_) throw std::logic_error("result::get"); return value_;}
T&& move() T&& move()
{if(!ok_) throw std::logic_error("result"); ok_ = false; return std::move(value_);} {if(!ok_) throw std::logic_error("result::move"); ok_ = false; return std::move(value_);}
private: private:
bool ok_; bool ok_;