1f51a89d39
These were ignored by git accidentally. We want ALL OF THEM since they all came in the llvm/clang source distribution.
61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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// If the implicitly-defined constructor would satisfy the requirements of a
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// constexpr constructor, the implicitly-defined constructor is constexpr.
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struct Constexpr1 {
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constexpr Constexpr1() : n(0) {}
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int n;
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};
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constexpr Constexpr1 c1a = Constexpr1(Constexpr1()); // ok
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constexpr Constexpr1 c1b = Constexpr1(Constexpr1(c1a)); // ok
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struct Constexpr2 {
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Constexpr1 ce1;
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constexpr Constexpr2() = default;
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constexpr Constexpr2(const Constexpr2 &o) : ce1(o.ce1) {}
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// no move constructor
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};
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constexpr Constexpr2 c2a = Constexpr2(Constexpr2()); // ok
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constexpr Constexpr2 c2b = Constexpr2(Constexpr2(c2a)); // ok
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struct Constexpr3 {
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Constexpr2 ce2;
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// all special constructors are constexpr, move ctor calls ce2's copy ctor
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};
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constexpr Constexpr3 c3a = Constexpr3(Constexpr3()); // ok
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constexpr Constexpr3 c3b = Constexpr3(Constexpr3(c3a)); // ok
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struct NonConstexprCopy {
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constexpr NonConstexprCopy() = default;
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NonConstexprCopy(const NonConstexprCopy &);
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constexpr NonConstexprCopy(NonConstexprCopy &&) = default;
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int n = 42;
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};
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NonConstexprCopy::NonConstexprCopy(const NonConstexprCopy &) = default; // expected-note {{here}}
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constexpr NonConstexprCopy ncc1 = NonConstexprCopy(NonConstexprCopy()); // ok
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constexpr NonConstexprCopy ncc2 = ncc1; // expected-error {{constant expression}} expected-note {{non-constexpr constructor}}
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struct NonConstexprDefault {
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NonConstexprDefault() = default;
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constexpr NonConstexprDefault(int n) : n(n) {}
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int n;
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};
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struct Constexpr4 {
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NonConstexprDefault ncd;
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};
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constexpr NonConstexprDefault ncd = NonConstexprDefault(NonConstexprDefault(1));
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constexpr Constexpr4 c4a = { ncd };
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constexpr Constexpr4 c4b = Constexpr4(c4a);
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constexpr Constexpr4 c4c = Constexpr4(static_cast<Constexpr4&&>(const_cast<Constexpr4&>(c4b)));
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struct Constexpr5Base {};
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struct Constexpr5 : Constexpr5Base { constexpr Constexpr5() {} };
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constexpr Constexpr5 ce5move = Constexpr5();
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constexpr Constexpr5 ce5copy = ce5move;
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