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#ifndef PARSER_NODE_H_
#define PARSER_NODE_H_
#include <vector>
#include <string>
#include <sstream>
#include <memory>
#include <cmath>
namespace SimpleParser {
enum NodeType {
OPERAND_NODE,
OPERATOR_NODE,
};
class Node {
public:
virtual ~Node() {};
virtual double solve() = 0;
virtual NodeType getType() = 0;
virtual std::string print() = 0;
Node* leftChild;
Node* rightChild;
};
class OperatorNode: public Node {
public:
explicit OperatorNode(char);
virtual double solve();
virtual NodeType getType();
virtual std::string print();
char getFunction();
private:
char function_;
};
class OperandNode: public Node {
public:
explicit OperandNode(double);
virtual double solve();
virtual NodeType getType();
virtual std::string print();
private:
double value_;
};
class Tree {
public:
void setRoot(Node*);
double solve();
Node* addOperand(Node**, double);
Node* addOperator(Node**, char);
std::string print(std::string);
private:
Node* root_node_;
std::vector<std::unique_ptr<Node>> node_collection_;
};
class divide_exception: public std::exception {
virtual const char* what() const throw()
{
return "A divison through zero had to be prevented by the parser - check your input term.";
}
};
}
#endif // PARSER_NODE_H_
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