I tried to use an array-device based stream and wantet to pass the stream to std::ostream_iterator
or std::istream_iterator
, but unfortunately, I get a compilation error with gcc 4.3.5.
Boost::IOStreams documentation states that the io::stream
is either derived from std::basic_istream
or std::basic_ostream
or both (std::basic_iostream
) dependent on the underlying device category. array device has seekable category, so I'd expect io::stream to derive from std::basic_iostream
and be compatible with std::ostream_iterator
or std::istream_iterator
. But I unfortunately get a compilation error.
Here is the code snippet:
namespace io=boost::io;
typedef unsigned char byte;
typedef io::basi开发者_JAVA百科c_array<byte> array_device;
typedef io::stream<array_device> array_stream;
byte my_buffer[256]={};
array_stream ios_(my_buffer);
std::istream_iterator<byte> in(ios_);
And the last line results in the error stating:
src/my_file.cpp: In member function 'void my_test_class::ctor::test_method()':
src/my_file.cpp:86: error: no matching function for call to
'std::istream_iterator<unsigned char, char, std::char_traits<char>, int>::istream_iterator(my_test_class::<unnamed>::array_stream&)'
You're not supplying enough template arguments for std::istream_iterator
-- the second argument is the underlying character type of the stream, which defaults to char
, but the underlying character type of your stream is byte
(unsigned char
).
Changing
std::istream_iterator<byte> in(ios_);
to
std::istream_iterator<byte, byte> in(ios_);
should work.
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