Re: [Boost-users] Data type to handle C++ and Boost streams?

Subject: Re: [Boost-users] Data type to handle C++ and Boost streams?
From: Richard (legalize+jeeves_at_[hidden])
Date: 2009-09-13 10:57:19

[Please do not mail me a copy of your followup]

boost-users_at_[hidden] spake the secret code
<h8hjl9$5h0$1_at_[hidden]> thusly:

>Bit of a basic question - I'd like to have some functions that work with files
>(using std::fstream) but can also handle boost::iostreams.  Is there a data
>type I can use that can handle both?  For example:
>
>  void writeSomeData(std::fstream out);
>
>I can't pass a boost::iostream::stream to this function.  What type can I use
>to achieve this?

Use the common base of std::basic_istream, std::basic_ostream,
std::basic_iostream.

I describe doing this in order to be able to unit test file handling
code with a string stream in this blog post:

How Do I Unit Test Something That Writes To A File?  <http://wp.me/pyVNs-V>
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