lass::python::Self< T > Class Template Reference

Wrapper to type-hint a return value as Self. More...

#include <self.h>

Public Member Functions
T &	reference ()
	Return reference to wrapped value.
const T &	reference () const
	Return reference to wrapped value.

Detailed Description

template<typename T>
class lass::python::Self< T >

Wrapper to type-hint a return value as Self.

This is helpful for virtual methods that return an object of the same type as the this pointer. Here's an example with a clone method:

class Spam
{
public:
    Self<TSpamPtr> clone() const
    {
        auto result = doClone();
        const Spam* cloned = result.get();
        LASS_ENFORCE(typeid(*cloned) != typeid(*this));
        return result;
    }
private:
    virtual TSpamPtr doClone() const // must be overriden by each derived class 
    {
        return TSpamPtr(new Spam(*this));
    }
};

This will make sure the type-hint of Spam will look like:

class Spam:
    def clone(self) -> Self: ...

See typing.Self and PEP 673 for more info.

See also

PyExportTraits<Self<T>>

NoNone

MaybeNone

Definition at line 91 of file self.h.

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The documentation for this class was generated from the following file:

• self.h