final/test/strings/basic.string/string.ops/string.accessors/data.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <string>

// const charT* data() const;

#include <string>
#include <cassert>

template <class S>
void
test(const S& s)
{
    typedef typename S::traits_type T;
    const typename S::value_type* str = s.data();
    if (s.size() > 0)
    {
        assert(T::compare(str, &s[0], s.size()) == 0);
        assert(T::eq(str[s.size()], typename S::value_type()));
    }
    else
        assert(T::eq(str[0], typename S::value_type()));
}

int main()
{
    typedef std::string S;
    test(S(""));
    test(S("abcde"));
    test(S("abcdefghij"));
    test(S("abcdefghijklmnopqrst"));
}