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57 lines
1.2 KiB
57 lines
1.2 KiB
4 months ago
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// const charT& front() const;
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// charT& front();
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#ifdef _LIBCPP_DEBUG
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#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
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#endif
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#include <string>
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#include <cassert>
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#include "min_allocator.h"
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template <class S>
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void
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test(S s)
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{
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const S& cs = s;
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assert(&cs.front() == &cs[0]);
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assert(&s.front() == &s[0]);
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s.front() = typename S::value_type('z');
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assert(s.front() == typename S::value_type('z'));
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}
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int main()
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{
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{
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typedef std::string S;
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test(S("1"));
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test(S("1234567890123456789012345678901234567890"));
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}
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#if TEST_STD_VER >= 11
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{
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typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
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test(S("1"));
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test(S("1234567890123456789012345678901234567890"));
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}
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#endif
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#ifdef _LIBCPP_DEBUG
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{
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std::string s;
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char c = s.front();
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assert(false);
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}
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#endif
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}
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