Typedefs | |
| typedef basic_ios< char > | std::ios |
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| typedef basic_streambuf< char > | std::streambuf |
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| typedef basic_istream< char > | std::istream |
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| typedef basic_ostream< char > | std::ostream |
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| typedef basic_iostream< char > | std::iostream |
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| typedef basic_stringbuf< char > | std::stringbuf |
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| typedef basic_istringstream< char > | std::istringstream |
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| typedef basic_ostringstream< char > | std::ostringstream |
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| typedef basic_stringstream< char > | std::stringstream |
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| typedef basic_filebuf< char > | std::filebuf |
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| typedef basic_ifstream< char > | std::ifstream |
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| typedef basic_ofstream< char > | std::ofstream |
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| typedef basic_fstream< char > | std::fstream |
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For ease of use and compatibility, all of the basic_* I/O-related classes are given typedef names for both of the builtin character widths (wide and narrow). The typedefs are the same as the pre-Standard names, for example:
typedef basic_ifstream<char> ifstream;
Because properly forward-declaring these classes can be difficult, you should not do it yourself. Instead, include the <iosfwd> header, which contains only declarations of all the I/O classes as well as the typedefs. Trying to forward-declare the typedefs themselves (e.g., "class ostream;") is not valid ISO C++.
For more specific declarations, see http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#10
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1.3.6