Extend the ELTL parser to support basic aliases of automaton
operators such as F=U(true,$0) or R=!U(!$0,!$1), and infix notation for binary automaton operators. * README: Document the ELTL directories. * src/eltlparse/eltlparse.yy, src/eltlparse/eltlscan.ll: Add support for aliases and infix notation. * src/eltlparse/public.hh, src/ltlast/nfa.cc, src/ltlast/nfa.hh: Clean them. * src/eltltest/acc.test, src/tgbatest/eltl2tgba.test: Add tests for the ELTL parser's extensions. * src/tgbatest/eltl2tgba.cc: Adjust.
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# include <utility>
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# include <iosfwd>
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// namespace
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// {
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// typedef std::map<std::string, spot::ltl::nfa::ptr> nfamap;
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// }
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namespace spot
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{
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using namespace ltl;
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/// \brief A list of parser diagnostics, as filled by parse.
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typedef std::list<parse_error> parse_error_list;
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///
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typedef std::map<std::string, nfa::ptr> nfamap;
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/// \brief Build a formula from a text file.
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/// \param name The name of the file to parse.
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/// \param error_list A list that will be filled with
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