Boost Users :
Subject: Re: [Boost-users] return type of boost::iostreams::stream<T>::read()
From: Eric MALENFANT (Eric.Malenfant_at_[hidden])
Date: 2008-10-14 09:47:29
Struebing, Axel, le-tex [axel.struebing_at_[hidden]]:
> Reading the documentation about boost::iostreams library I could not
> find the information which return type the boost::iostreams::stream's
> class is giving me calling read().
>From the documentation, a boost::iostreams::stream derives from an std::basic_[i|o]stream, depending on the model of its underlying Device. In your example, the device is a Source, so I guess that the stream derives from std::basic_istream, whose read(char*, streamsize) method returns a basic_istream, not a streamsize.
The library offers the "streamsize read(stream, char*, streamsize)" function template. Using it in your example yould give something like (not tested):
namespace bio = boost::iostreams;
std::streamsize i = bio::read(istr,buffer,10);
Two wrongs don't make a right but three rights make a left.
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