|
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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#ifndef CommonTools_Utils_ExpressionVar_h
#define CommonTools_Utils_ExpressionVar_h
/* \class reco::parser::ExpressionVar
*
* Variable expression
*
* \author original version: Chris Jones, Cornell,
* adapted by Luca Lista, INFN
*
*/
#include "CommonTools/Utils/interface/parser/ExpressionBase.h"
#include "CommonTools/Utils/interface/parser/MethodInvoker.h"
#include "CommonTools/Utils/interface/TypeCode.h"
#include <vector>
#include <oneapi/tbb/concurrent_queue.h>
namespace reco {
namespace parser {
/// Evaluate an object's method or datamember (or chain of them) to get a number
class ExpressionVar : public ExpressionBase {
private: // Private Data Members
std::vector<MethodInvoker> methods_;
using Objects = std::vector<std::pair<edm::ObjectWithDict, bool>>;
mutable oneapi::tbb::concurrent_queue<Objects> objectsCache_;
method::TypeCode retType_;
private: // Private Methods
[[nodiscard]] Objects initObjects_() const;
Objects borrowObjects() const;
void returnObjects(Objects&&) const;
public: // Public Static Methods
static bool isValidReturnType(method::TypeCode);
/// performs the needed conversion from void* to double
/// this method is used also from the ExpressionLazyVar code
static double objToDouble(const edm::ObjectWithDict& obj, method::TypeCode type);
/// allocate an object to hold the result of a given member (if needed)
/// this method is used also from the LazyInvoker code
/// returns true if objects returned from this will require a destructor
static bool makeStorage(edm::ObjectWithDict& obj, const edm::TypeWithDict& retType);
/// delete an objecty, if needed
/// this method is used also from the LazyInvoker code
static void delStorage(edm::ObjectWithDict&);
public: // Public Methods
ExpressionVar(const std::vector<MethodInvoker>& methods, method::TypeCode retType);
ExpressionVar(const ExpressionVar&);
~ExpressionVar() override;
double value(const edm::ObjectWithDict&) const override;
};
/// Same as ExpressionVar but with lazy resolution of object methods
/// using the dynamic type of the object, and not the one fixed at compile time
class ExpressionLazyVar : public ExpressionBase {
private: // Private Data Members
std::vector<LazyInvoker> methods_;
public:
ExpressionLazyVar(const std::vector<LazyInvoker>& methods);
~ExpressionLazyVar() override;
double value(const edm::ObjectWithDict&) const override;
};
} // namespace parser
} // namespace reco
#endif // CommonTools_Utils_ExpressionVar_h
|