xref: /llvm-project-15.0.7/libcxx/test/std/strings/basic.string/string.capacity/clear.pass.cpp (revision f2f2a639)

//===----------------------------------------------------------------------===//
//
//                     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>

// void clear();

#include <string>
#include <cassert>

#include "min_allocator.h"

template <class S>
void
test(S s)
{
    s.clear();
    assert(s.size() == 0);
}

int main()
{
    {
    typedef std::string S;
    S s;
    test(s);

    s.assign(10, 'a');
    s.erase(5);
    test(s);

    s.assign(100, 'a');
    s.erase(50);
    test(s);
    }
#if TEST_STD_VER >= 11
    {
    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
    S s;
    test(s);

    s.assign(10, 'a');
    s.erase(5);
    test(s);

    s.assign(100, 'a');
    s.erase(50);
    test(s);
    }
#endif
}