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The format library provides a type-safe mechanism for formatting arguments according to a printf-like format-string.
Boost.IOStreams provides a framework for defining streams, stream buffers and i/o filters.
General literal text conversions, such as an int represented a string, or vice-versa.
LL parser framework represents parsers directly as EBNF grammars in inlined C++.
Break of a string or other character sequence into a series of tokens.
The Boost.Wave library is a Standards conformant, and highly configurable implementation of the mandated C99/C++ preprocessor functionality packed behind an easy to use iterator interface.