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#pragma once
#include <regex>
#include <string>
#include <array>
enum Type {
operand,
sum,
substraction,
multiplication,
division,
left_parens,
right_parens,
equals
};
struct Token {
Type type;
int value;
};
class Tokenizer {
private:
// Private attributes
std::array<Token *, 16> tokens;
const std::string *to_tokenize;
size_t current_char_index;
short tokens_head;
// Regexes
std::regex operand_regex = std::regex("^0{1}|\\d+");
std::regex operation_regex = std::regex("\\+|-|/|\\*");
std::regex parens_regex = std::regex("(|)");
// End of private attributes
// Private methods
void clearTokens();
void insertToken(Type type, int value);
void matchOperation(const std::string &operation);
void matchParens(const std::string &operation);
void matchOperand(const std::string &operation);
std::string buildNumber(char *current);
// End of private methods
public:
Tokenizer();
~Tokenizer();
const std::array<Token *, 16> &tokenize(const std::string &operation);
const std::array<Token *, 16> &getTokens();
};
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