Description:

Spirit is an object oriented recursive descent parser
generator framework implemented using template meta-programming
techniques. Expression templates allow us to approximate the syntax of
Extended Backus Normal Form (EBNF) completely in C++. Parser objects
are composed through operator overloading and the result is a
backtracking LL(inf) parser that is capable of parsing rather
ambiguous grammars.

The Spirit framework enables a target grammar to be written
exclusively in C++. Inline EBNF grammar specifications can mix freely
with other C++ code and, thanks to the generative power of C++
templates, are immediately executable. In retrospect, conventional
compiler-compilers or parser-generators have to perform an additional
translation step from the source EBNF code to C or C++ code.