63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
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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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// <array>
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// reference front();
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// reference back();
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// const_reference front(); // constexpr in C++14
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// const_reference back(); // constexpr in C++14
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#include <array>
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#include <cassert>
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int main()
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{
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{
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typedef double T;
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typedef std::array<T, 3> C;
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C c = {1, 2, 3.5};
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C::reference r1 = c.front();
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assert(r1 == 1);
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r1 = 5.5;
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assert(c[0] == 5.5);
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C::reference r2 = c.back();
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assert(r2 == 3.5);
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r2 = 7.5;
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assert(c[2] == 7.5);
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}
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{
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typedef double T;
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typedef std::array<T, 3> C;
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const C c = {1, 2, 3.5};
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C::const_reference r1 = c.front();
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assert(r1 == 1);
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C::const_reference r2 = c.back();
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assert(r2 == 3.5);
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}
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#if _LIBCPP_STD_VER > 11
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{
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typedef double T;
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typedef std::array<T, 3> C;
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constexpr C c = {1, 2, 3.5};
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constexpr T t1 = c.front();
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static_assert (t1 == 1, "");
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constexpr T t2 = c.back();
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static_assert (t2 == 3.5, "");
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}
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#endif
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}
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