Re: Can I overload with unused arguments to make the code clear?

From:

red floyd <no.spam.here@its.invalid>

Newsgroups:

comp.lang.c++.moderated

Date:

Tue, 19 Mar 2013 17:11:47 -0700 (PDT)

Message-ID:

<kiajtn$n03$1@dont-email.me>

On 3/19/2013 12:41 PM, DeMarcus wrote:

]redacted]
I have a class that takes a handle and a function with
how to deallocate the handle, like this.

class HandleHolder
{
public:
HandleHolder( int handle, std::function<void(int)> deallocator );
};

I /can/ use it like this.

HandleHolder myHandleHolder( someHandle, nullptr );

but I want to find a way to avoid using nullptr here since that forces a
documentation lookup what argument two actually is. If I instead write
something like:

HandleHolder myHandleHolder( someHandle, NO_DEALLOCATION );

then it's much more clear what's going on and I don't need to check the
documentation. If overloading the constructor so I can use:

namespace {
    const std::function<void(int)> NO_DEALLOCATION = nullptr;
}

or, if you'd rather use the preprocessor:

#define NO_DEALLOCATION nullptr

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