C++ Frozen String Library

This library provides string which is constructible in both compile-time and runtime. std::string is modifiable and not immutable but frozen::string which this library provides is immutable and static.

Constexpr

#include "frozen/string.hpp"
#include <iostream>

using frozen::operator"" _fstr;


// construct string
constexpr frozen::string<10> s1 = "hoge";
constexpr auto s2 = frozen::make_string("hoge");

// immutable!
s1[0] = 'h'; // error!

// construct from numbers
constexpr auto answer = frozen::to_string(42); // from integer
constexpr auto pi = frozen::to_string(3.141592); // from floating point

// compare to string
s1 == frozen::make_string("hoge"); // true
s1 == "hoge?"; // false

// concat strings or numbers
s1 + frozen::make_string("poyo"); // "hogepoyo"
s1 + "poyo"; // "hogepoyo"
s1 + '!'; // "hoge!"
s1 + 42; // "hoge42"
s1 + 3.14; // "hoge3.14"
make_string("Today is ") + 8 + '/' + 5; // "Today is 8/5"

// output
std::cout << s1;

// conversion
s1.data(); // to char const *
s1.to_std_string(); // to std::string

// user defined literals
123.45_fstr; // "123.45"
42_fstr; // "12"
"hoge"_fstr; // "hoge"
u'ω'_fstr; // "ω"

// wide strings for wchar_t, char16_t, char32_t
frozen::wstring<13> ws1 = L"あああ";
auto ws2 = frozen::make_string(L"つらぽよ");
auto answer = frozen::to_u16string(3.14);

See example directory to see more examples.

Template level

Under construction.

Compiler Requirements

• gcc : 4.8 or later
• clang : 3.4 or later
• Boost.PreProcessor for frozen::type template meta functions

Author

@Linda_pp

License

Copyright (c) 2013 rhysd

Distributed under the Boost Software License, Version 1.0.

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
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must be included in all copies of the Software, in whole or in part, and
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