|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
#ifndef CommonTools_Utils_ExpressionSelectorSetter_h
#define CommonTools_Utils_ExpressionSelectorSetter_h
/* \class reco::parser::ExpressionSelectorSetter
*
* Creates an implicit Binary selector setter by comparing an expression to 0
*
* \author original version: Chris Jones, Cornell,
* adapted by Luca Lista, INFN
*
* \version $Revision: 1.2 $
*
*/
#include "CommonTools/Utils/interface/parser/SelectorStack.h"
#include "CommonTools/Utils/interface/parser/ExpressionStack.h"
#include "CommonTools/Utils/interface/parser/BinarySelector.h"
#include "CommonTools/Utils/interface/parser/ExpressionNumber.h"
#include "CommonTools/Utils/interface/parser/Comparison.h"
#include "CommonTools/Utils/interface/parser/Exception.h"
#include <functional>
namespace reco {
namespace parser {
class ExpressionSelectorSetter {
public:
ExpressionSelectorSetter(SelectorStack& selStack, ExpressionStack& expStack)
: selStack_(selStack), expStack_(expStack) {}
void operator()(const char* begin, const char*) const {
if (expStack_.empty())
throw Exception(begin) << "Grammar error: empty expression stack. Please contact developer."
<< "\"";
std::shared_ptr<ExpressionBase> rhs = expStack_.back();
expStack_.pop_back();
std::shared_ptr<ExpressionBase> lhs(new ExpressionNumber(0.0));
std::shared_ptr<ComparisonBase> comp(new Comparison<std::not_equal_to<double> >());
#ifdef BOOST_SPIRIT_DEBUG
BOOST_SPIRIT_DEBUG_OUT << "pushing expression selector" << std::endl;
#endif
selStack_.push_back(SelectorPtr(new BinarySelector(lhs, comp, rhs)));
}
private:
SelectorStack& selStack_;
ExpressionStack& expStack_;
};
} // namespace parser
} // namespace reco
#endif
|