RAII pointers

Russel Winder via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Mon May 29 16:39:17 PDT 2017


C++ allows one to create types that are pointer types but wrap a
primitive pointer to give RAII handling of resources. For example:


    class Dvb::FrontendParameters_Ptr {
    private:
    	    dvb_v5_fe_parms * ptr;
    public:
    	    FrontendParameters_Ptr(FrontendId const & fei, unsigned int const verbose = 0, unsigned int const legacy = 0);
    	    FrontendParameters_Ptr(FrontendParameters_Ptr const &) = delete;
    	    FrontendParameters_Ptr & operator=(FrontendParameters_Ptr const &) = delete;
    	    ~FrontendParameters_Ptr() {dvb_fe_close(ptr); }
    	    dvb_v5_fe_parms * c_ptr() const { return ptr; }
    	    dvb_v5_fe_parms * operator->() const { return ptr; }
    };


Has anyone any experience of doing the analogous thing idiomatically in
D.

I just re-realised I manually constructed a C++ abstraction layer
around some of libdvbv5, so I am going to do the same for D. However
whilst I (sort of) understand doing the wrapping with C++, I am not
sure I have seen anyone wrapping C pointers with RAII in D.

-- 
Russel.
=============================================================================
Dr Russel Winder      t: +44 20 7585 2200   voip: sip:russel.winder at ekiga.net
41 Buckmaster Road    m: +44 7770 465 077   xmpp: russel at winder.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder
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