Class option
Synopsis
#include <include/cpptoml.h>
template <class T>
class option
Description
No description yet.
Mentioned in
- Getting Started / Obtaining Basic Values
- Getting Started / Arrays of Values
Methods
| option overload | ||
| operator bool | ||
| operator* | ||
| operator-> | ||
| value_or | Mentioned in
|
Source
Lines 58-98 in include/cpptoml.h.
template <class T>
class option
{
public:
option() : empty_{true}
{
// nothing
}
option(T value) : empty_{false}, value_(std::move(value))
{
// nothing
}
explicit operator bool() const
{
return !empty_;
}
const T& operator*() const
{
return value_;
}
const T* operator->() const
{
return &value_;
}
template <class U>
T value_or(U&& alternative) const
{
if (!empty_)
return value_;
return static_cast<T>(std::forward<U>(alternative));
}
private:
bool empty_;
T value_;
};