[642] | 1 | #ifndef __XIOS_SCALAR_EXPR_NODE_HPP__ |
---|
| 2 | #define __XIOS_SCALAR_EXPR_NODE_HPP__ |
---|
| 3 | |
---|
| 4 | #include <string> |
---|
| 5 | #include <boost/smart_ptr/scoped_ptr.hpp> |
---|
| 6 | |
---|
| 7 | namespace xios |
---|
| 8 | { |
---|
| 9 | /*! |
---|
| 10 | * Interface implemented by all the nodes of a tree representing an expression |
---|
| 11 | * which can be reduced to a scalar value. |
---|
| 12 | */ |
---|
| 13 | struct IScalarExprNode |
---|
| 14 | { |
---|
| 15 | /*! |
---|
| 16 | * Builds a filter graph corresponding to the expression tree. |
---|
| 17 | * |
---|
| 18 | * \return the output pin of the filter producing the result of the expression |
---|
| 19 | */ |
---|
| 20 | virtual double reduce() const = 0; |
---|
| 21 | }; |
---|
| 22 | |
---|
| 23 | /*! |
---|
| 24 | * Expression node corresponding to a scalar value. |
---|
| 25 | */ |
---|
| 26 | class CScalarValExprNode : public IScalarExprNode |
---|
| 27 | { |
---|
| 28 | public: |
---|
| 29 | /*! |
---|
| 30 | * Constructs an expression node corresponding to the specified scalar value. |
---|
| 31 | * |
---|
| 32 | * \param strVal the string representation of the scalar value |
---|
| 33 | */ |
---|
| 34 | CScalarValExprNode(const std::string& strVal); |
---|
| 35 | |
---|
| 36 | double reduce() const; |
---|
| 37 | |
---|
| 38 | private: |
---|
| 39 | std::string strVal; //!< The string representation of the scalar value |
---|
| 40 | }; |
---|
| 41 | |
---|
| 42 | /*! |
---|
| 43 | * Expression node corresponding to a scalar variable. |
---|
| 44 | */ |
---|
| 45 | class CScalarVarExprNode : public IScalarExprNode |
---|
| 46 | { |
---|
| 47 | public: |
---|
| 48 | /*! |
---|
| 49 | * Constructs an expression node corresponding |
---|
| 50 | * to the scalar variable whose id is provided. |
---|
| 51 | * |
---|
| 52 | * \param varId the identifier of the scalar variable |
---|
| 53 | */ |
---|
| 54 | CScalarVarExprNode(const std::string& varId); |
---|
| 55 | |
---|
| 56 | double reduce() const; |
---|
| 57 | |
---|
| 58 | private: |
---|
| 59 | std::string varId; //!< The identifier of the field |
---|
| 60 | }; |
---|
| 61 | |
---|
| 62 | /*! |
---|
| 63 | * Expression node corresponding to a unary operation on a scalar. |
---|
| 64 | */ |
---|
| 65 | class CScalarUnaryOpExprNode : public IScalarExprNode |
---|
| 66 | { |
---|
| 67 | public: |
---|
| 68 | /*! |
---|
| 69 | * Constructs an expression node corresponding to the specified unary operation |
---|
| 70 | * applied to the provided scalar node. |
---|
| 71 | * Note that the child node will be destroyed automatically when the parent node |
---|
| 72 | * is destroyed. |
---|
| 73 | * |
---|
| 74 | * \param opId the identifier of the operator |
---|
| 75 | * \param child the scalar child node to which the operator is applied |
---|
| 76 | */ |
---|
| 77 | CScalarUnaryOpExprNode(const std::string& opId, IScalarExprNode* child); |
---|
| 78 | |
---|
| 79 | double reduce() const; |
---|
| 80 | |
---|
| 81 | private: |
---|
| 82 | std::string opId; //!< The identifier of the field |
---|
| 83 | boost::scoped_ptr<IScalarExprNode> child; //!< The scalar child node to which the operator is applied |
---|
| 84 | }; |
---|
| 85 | |
---|
| 86 | /*! |
---|
| 87 | * Expression node corresponding to a binary operation on two scalars. |
---|
| 88 | */ |
---|
| 89 | class CScalarBinaryOpExprNode : public IScalarExprNode |
---|
| 90 | { |
---|
| 91 | public: |
---|
| 92 | /*! |
---|
| 93 | * Constructs an expression node corresponding to the specified binary operation |
---|
| 94 | * applied to the provided scalar child nodes. |
---|
| 95 | * Note that the child nodes will be destroyed automatically when the parent node |
---|
| 96 | * is destroyed. |
---|
| 97 | * |
---|
| 98 | * \param opId the identifier of the operator |
---|
| 99 | * \param child1, child2 the scalar child nodes to which the operator is applied |
---|
| 100 | */ |
---|
| 101 | CScalarBinaryOpExprNode(IScalarExprNode* child1, const std::string& opId, IScalarExprNode* child2); |
---|
| 102 | |
---|
| 103 | double reduce() const; |
---|
| 104 | |
---|
| 105 | private: |
---|
| 106 | std::string opId; //!< The identifier of the field |
---|
| 107 | boost::scoped_ptr<IScalarExprNode> child1, child2; //!< The scalar child nodes to which the operator is applied |
---|
| 108 | }; |
---|
[1158] | 109 | |
---|
| 110 | class CScalarTernaryOpExprNode : public IScalarExprNode |
---|
| 111 | { |
---|
| 112 | public: |
---|
| 113 | /*! |
---|
| 114 | * Constructs an expression node corresponding to the specified ternary operation |
---|
| 115 | * applied to the provided scalar child nodes. |
---|
| 116 | * Note that the child nodes will be destroyed automatically when the parent node |
---|
| 117 | * is destroyed. |
---|
| 118 | * |
---|
| 119 | * \param opId the identifier of the operator |
---|
| 120 | * \param child1, child2 , child3 the scalar child nodes to which the operator is applied |
---|
| 121 | */ |
---|
| 122 | CScalarTernaryOpExprNode(IScalarExprNode* child1, const std::string& opId, IScalarExprNode* child2, IScalarExprNode* child3); |
---|
| 123 | |
---|
| 124 | double reduce() const; |
---|
| 125 | |
---|
| 126 | private: |
---|
| 127 | std::string opId; //!< The identifier of the field |
---|
| 128 | boost::scoped_ptr<IScalarExprNode> child1, child2, child3; //!< The scalar child nodes to which the operator is applied |
---|
| 129 | }; |
---|
[642] | 130 | } |
---|
| 131 | |
---|
| 132 | #endif // __XIOS_SCALAR_EXPR_NODE_HPP__ |
---|