Version_test.h

/*
 * This file contains code from "C++ Primer, Fifth Edition", by Stanley B.
 * Lippman, Josee Lajoie, and Barbara E. Moo, and is covered under the
 * copyright and warranty notices given in that book:
 * 
 * "Copyright (c) 2013 by Objectwrite, Inc., Josee Lajoie, and Barbara E. Moo."
 * 
 * 
 * "The authors and publisher have taken care in the preparation of this book,
 * but make no expressed or implied warranty of any kind and assume no
 * responsibility for errors or omissions. No liability is assumed for
 * incidental or consequential damages in connection with or arising out of the
 * use of the information or programs contained herein."
 * 
 * Permission is granted for this code to be used for educational purposes in
 * association with the book, given proper citation if and when posted or
 * reproduced. Any commercial use of this code requires the explicit written
 * permission of the publisher, Addison-Wesley Professional, a division of
 * Pearson Education, Inc. Send your request for permission, stating clearly
 * what code you would like to use, and in what specific way, to the following
 * address: 
 * 
 * 	Pearson Education, Inc.
 * 	Rights and Permissions Department
 * 	One Lake Street
 * 	Upper Saddle River, NJ  07458
 * 	Fax: (201) 236-3290
*/

#ifndef VERSION_TEST_H
#define VERSION_TEST_H


/* As of the first printing of C++ Primer, 5th Edition (July 2012), 
 * the gcc Version 4.7.0 did not yet support some C++ 11 features.  
 *
 * The code we distribute contains both normal C++ code and 
 * workarounds for missing features.  We use preprocessor variables to
 * determine whether a given features is implemented in a given release
 * of the compiler.  
 * The base version we used to test the code in the book
 * is gcc version 4.7.0 (GCC) 
 *
 * When new releases are available we will update this file which will
 * #define the features implmented in that release.
*/

#if __cplusplus == 201103L 
// base version, future releases of this file will 
// #define these variables as features as they are implemented 

/* Code in this delivery use the following variables to control compilation

   Variable tests           C++ 11 Feature 
HEX_MANIPS               hexfloat and defaultfloat manipulators
REFMEMS                  reference qualified member functions
REGEX                    regular expressions library
STRING_NUMERIC_CONVS     conversions to and from string to numeric
*/
#endif  // ends compiler version check

#ifndef STRING_NUMERIC_CONVS
// if the library doesn't define to_string 
// or the numeric conversion functions
// as a workaround we define to_string and stod in this file

// Readers can ignore the implemnetations of to_string and stod 
// but can use these functions in their code.

#include <iostream>
#include <cstdlib>
#include <cstddef>
#include <string>
// we use sprintf from stdio to implement to_string
#include <cstdio>

inline
std::string to_string(int i)
{
	char buf[100];
	std::sprintf(buf, "%d", i);
	return buf;
}

inline
double stod(const std::string &s, std::size_t * = 0)
{
	char **buf = 0;
	return std::strtod(s.c_str(), buf);
}
#endif   // STRING_NUMERIC_CONVS

#include <iostream>

#ifndef HEX_MANIPS
inline
std::ostream &defaultfloat(std::ostream &os) 
{
	os.unsetf(std::ios_base::floatfield);
	return os;
}
#endif   // HEX_MANIPS

#endif  // ends header guard