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File indexing completed on 2021-12-17 23:35:56

0001 #include "CommonTools/Utils/interface/cutParser.h"
0002 #include "CommonTools/Utils/src/AnyObjSelector.h"
0003 #include "CommonTools/Utils/interface/Grammar.h"
0004 #include "FWCore/Utilities/interface/EDMException.h"
0005 
0006 using namespace reco::parser;
0007 bool reco::parser::cutParser(const edm::TypeWithDict& t, const std::string& cut, SelectorPtr& sel, bool lazy = false) {
0008   bool justBlanks = true;
0009   for (std::string::const_iterator c = cut.begin(); c != cut.end(); ++c) {
0010     if (*c != ' ') {
0011       justBlanks = false;
0012       break;
0013     }
0014   }
0015   if (justBlanks) {
0016     sel = SelectorPtr(new AnyObjSelector);
0017     return true;
0018   } else {
0019     using namespace boost::spirit::classic;
0020     Grammar grammar(sel, t, lazy);
0021     bool returnValue = false;
0022     const char* startingFrom = cut.c_str();
0023     try {
0024       returnValue = parse(startingFrom, grammar.use_parser<0>() >> end_p, space_p).full;
0025     } catch (BaseException& e) {
0026       throw edm::Exception(edm::errors::Configuration)
0027           << "Cut parser error:" << baseExceptionWhat(e) << " (char " << e.where - startingFrom << ")\n"
0028           << "Cut string was " << cut;
0029     }
0030     return returnValue;
0031   }
0032 }