OmniSciDB  d2f719934e
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
ResultSetReductionInterpreter.h
Go to the documentation of this file.
1 /*
2  * Copyright 2019 OmniSci, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include "ResultSetReductionOps.h"
20 
21 #include <optional>
22 #include <unordered_map>
23 
25  public:
26  union EvalValue {
27  int64_t int_val;
28  double double_val;
29  float float_val;
30  const void* ptr;
31  void* mutable_ptr;
32  };
33 
34  static EvalValue run(const Function* function, const std::vector<EvalValue>& inputs);
35 
36  template <typename T>
37  static EvalValue MakeEvalValue(const T& val) {
38  EvalValue ret;
39  if constexpr (std::is_integral<T>::value) {
40  ret.int_val = static_cast<int64_t>(val);
41  } else if constexpr (std::is_same<T, float>::value) {
42  ret.float_val = val;
43  } else if constexpr (std::is_same<T, double>::value) {
44  ret.double_val = val;
45  } else if constexpr (std::is_pointer<T>::value) {
46  ret.ptr = val;
47  }
48  return ret;
49  }
50 
51  static std::optional<EvalValue> run(
52  const std::vector<std::unique_ptr<Instruction>>& body,
53  const std::vector<EvalValue>& vars);
54 };
static EvalValue run(const Function *function, const std::vector< EvalValue > &inputs)
static EvalValue MakeEvalValue(const T &val)