tokens.h

#ifndef TOKENS_H
#define TOKENS_H

#include <string>
#include <vector>

namespace Math_Interpreter {

enum class TokenType {
    NUMBER,
    PLUS,
    MINUS,
    MULTIPLY,
    DIVIDE,
    LPAREN,
    RPAREN,
    EOF_
};

class Token {
public:
    TokenType type;
    double value;

    Token(TokenType type) : type(type) {}
    Token(TokenType type, double value) : type(type), value(value) {}

    explicit operator bool() const; // returns true if type != TokenType::EOF_ else returns false

    std::string str() const;
    operator std::string() const; // this will call str(), this is just to make kind of like a "__repr__" function in Python
};

void print_tokens(const std::vector<Token>& tokens);

} // namespace Math_Interpreter


#endif // TOKENS_H