cpp курсач2

#include "stdafx.h"
#include <map>
#include <stdio.h>
#include <string>
#include <iostream>
#include <fstream>
#include <regex>

#include "parser_edsl.h"

enum TokType {
	END_OF_TEXT = 0,
	PRINT, READ, VARNAME, NUMBER, STRING,
	PLUS = '+', MINUS = '-', MUL = '*', DIV = '/', SET = '=',
	SEMICOLON = ';', COMMA = ',', LP = '(', RP = ')'
};

//double add_func1(double x, double y) {
//	return x + y;
//}
//NTerm<TokType, double> E =
//Rule() << E << PLUS << Term<double>(NUMBER) << add_func1
//| Rule() << Term<double>(NUMBER);
//
//void print_val_func(double value) {
//	printf("%f", value);
//}
//
//NTerm<TokType, void> P =
//Rule() << PRINT << E << print_val_func;

// <тип токена, возвращаемое значение функции (void, если функции нет)>
// Program
extern NTerm<TokType, void> Operator;

NTerm<TokType, void> Program =
Rule() << Operator
| Rule() << Program << ';' << Operator;


// Operator
extern NTerm<TokType, void> InputOperator, PrintOperator, AssignOperator;

NTerm<TokType, void> Operator =
Rule() << InputOperator
| Rule() << PrintOperator
| Rule() << AssignOperator;


// InputOperator
extern NTerm<TokType, double*> Variable;

void input_func(double *variable) {
	scanf("%lf", variable);
}

NTerm<TokType, void> InputOperator =
Rule() << READ << Variable << input_func
| Rule() << InputOperator << ',' << Variable << input_func;


// PrintOperator
extern NTerm<TokType, double> Expression;

void print_val_func(double value) {
	printf("%f", value);
}

void print_str_func(std::string str) {
	printf("%s", str.c_str());
}

NTerm<TokType, void> PrintOperator =
Rule() << PRINT << Expression << print_val_func
| Rule() << PRINT << Term<std::string>(STRING) << print_str_func
| Rule() << PrintOperator << ',' << Expression << print_val_func
| Rule() << PrintOperator << ',' << Term<std::string>(STRING) << print_str_func;


// AssignOperator
void assign_func(double *variable, double value) {
	*variable = value;
}

NTerm<TokType, void> AssignOperator =
Rule() << Variable << '=' << Expression << assign_func;


// Variable
std::map<std::string, double> variables;

double *variable_func(std::string name) {
	return &variables[name];
}

NTerm<TokType, double*> Variable =
Rule() << Term<std::string>(VARNAME) << variable_func;


// Expression
extern NTerm<TokType, double> ExprTerm;  // Слагаемое

double add_func(double x, double y) {
	return x + y;
}

double sub_func(double x, double y) {
	return x - y;
}

NTerm<TokType, double> Expression =
Rule() << ExprTerm
| Rule() << Expression << '+' << ExprTerm << add_func
| Rule() << Expression << '-' << ExprTerm << sub_func;


// ExprTerm
extern NTerm<TokType, double> Factor;

double mul_func(double x, double y) {
	return x * y;
}

double div_func(double x, double y) {
	return x / y;
}

NTerm<TokType, double> ExprTerm =
Rule() << Factor
| Rule() << ExprTerm << '*' << Factor << mul_func
| Rule() << ExprTerm << '/' << Factor << div_func;


// Factor
double deref_var_func(double *variable) {
	return *variable;
}

NTerm<TokType, double> Factor =
Rule() << Term<double>(NUMBER)
| Rule() << Variable << deref_var_func
| Rule() << LP << Expression << ')';

class MyLexer : public Lexer<TokType> {
	int i = 0;
	char* buffer;

	public:
		MyLexer(char *input_file)
		{
			buffer = input_file;
		}

	Token<TokType> *next_token() {
		Coord coord;
		coord.filename = "in.txt";
		coord.line = 1;
		coord.col = 1;
		i++;
		switch (i)
		{
			case 1:
				return new Token<TokType>(PRINT, coord);
			case 2:
				return new AttrToken<TokType, double>(NUMBER, 8, coord);
			case 3:
				return new Token<TokType>(PLUS, coord);
			case 4:
				return new AttrToken<TokType, double>(NUMBER, 10, coord);
			case 5:
				return new Token<TokType>(PLUS, coord);
			case 6:
			//	return new AttrToken<TokType, double>(NUMBER, 10, coord);
			//case 7:
				return new Token<TokType>(END_OF_TEXT, coord);
		}
	}
};


// Основная программа
int main(int argc, char *argv[]) {
	setlocale(LC_ALL, "RUS");

	if (argc > 1) {
		//MyLexer lexer(argv[1]);
		//Program.parse(lexer);
	}
	else {
		std::ifstream file;
		file.open("C:\\Users\\Lenovo\\Documents\\Visual Studio 2013\\Projects\\ConsoleApplication1\\ConsoleApplication1\\in.txt", std::ios::in);

		if (file) {
			std::filebuf* pbuf = file.rdbuf();
			std::size_t size = pbuf->pubseekoff(0, file.end, file.in);
			pbuf->pubseekpos(0, file.in);

			char* buffer = new char(size);
			int p = sizeof(char);
			pbuf->sgetn(buffer, size);
			//std::cout.write(buffer, size);

			MyLexer lexer(buffer);
			PrintOperator.parse(lexer);
			//delete[] buffer;
		}
		else
		{
			std::cout << "Где файл? Нет файла." << '\n';
		}
	}	
	
	return 0;
}