Re: Errors using shared_ptr<> and get_deleter in g++-4.1/4.3/4.4

From:

=?ISO-8859-1?Q?Daniel_Kr=FCgler?= <daniel.kruegler@googlemail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Tue, 13 Apr 2010 03:52:37 CST

Message-ID:

<08380e4b-627c-4d39-99bc-2835aca6816c@u34g2000yqu.googlegroups.com>

On 12 Apr., 23:41, Mike <mh...@bluezoosoftware.com> wrote:

I'm trying to use shared_ptr and get_deleter in a library I'm
developing, but having problems with syntax errors. Below is a
reduced version that shows the errors I'm getting when building with g+
+-4.1/4.3/4.4:

[..]

template <typename T>
struct NoDeleter
{
     void operator()(T *p)
     {
         return;
     }
};

template <typename T>
struct Deleter
{
     void operator()(T *p)
     {
         delete p;
     }
};

Note that these are class templates, so you
need to instantiate specializations of them
by providing a corresponding type as in

Deleter<Base>

which you didn't do, instead you wrote

Deleter

Either instantiate them with proper types or
consider to change these templates to
normal classes with a template operator()
overload like this:

struct NoDeleter {
   template <typename T>
   void operator()(T *p) {}
};

struct Deleter {
   template <typename T>
   void operator()(T *p) {
     delete p;
   }
};

With the latter changes your code should compile
as written.

HTH & Greetings from Bremen,

Daniel Kr?gler

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