cutParser.cc

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#include "CommonTools/Utils/interface/cutParser.h"
#include "CommonTools/Utils/src/AnyObjSelector.h"
#include "CommonTools/Utils/interface/Grammar.h"
#include "FWCore/Utilities/interface/EDMException.h"

using namespace reco::parser;
bool reco::parser::cutParser(const edm::TypeWithDict& t, const std::string& cut, SelectorPtr& sel, bool lazy = false) {
  bool justBlanks = true;
  for (std::string::const_iterator c = cut.begin(); c != cut.end(); ++c) {
    if (*c != ' ') {
      justBlanks = false;
      break;
    }
  }
  if (justBlanks) {
    sel = SelectorPtr(new AnyObjSelector);
    return true;
  } else {
    using namespace boost::spirit::classic;
    Grammar grammar(sel, t, lazy);
    bool returnValue = false;
    const char* startingFrom = cut.c_str();
    try {
      returnValue = parse(startingFrom, grammar.use_parser<0>() >> end_p, space_p).full;
    } catch (BaseException& e) {
      throw edm::Exception(edm::errors::Configuration)
          << "Cut parser error:" << baseExceptionWhat(e) << " (char " << e.where - startingFrom << ")\n"
          << "Cut string was " << cut;
    }
    return returnValue;
  }
}