124 lines
4.0 KiB
C++
124 lines
4.0 KiB
C++
// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
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// RUN: %clang_cc1 -std=c++2a -triple x86_64-unknown-unknown %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
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#if __cplusplus < 201103L
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// expected-error@+1 {{variadic macro}}
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#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
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#endif
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namespace dr1813 { // dr1813: 7
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struct B { int i; };
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struct C : B {};
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struct D : C {};
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struct E : D { char : 4; };
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static_assert(__is_standard_layout(B), "");
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static_assert(__is_standard_layout(C), "");
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static_assert(__is_standard_layout(D), "");
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static_assert(!__is_standard_layout(E), "");
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struct Q {};
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struct S : Q {};
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struct T : Q {};
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struct U : S, T {};
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static_assert(__is_standard_layout(Q), "");
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static_assert(__is_standard_layout(S), "");
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static_assert(__is_standard_layout(T), "");
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static_assert(!__is_standard_layout(U), "");
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}
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namespace dr1814 { // dr1814: yes
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#if __cplusplus >= 201103L
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void test() {
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auto lam = [](int x = 42) { return x; };
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}
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#endif
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}
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namespace dr1815 { // dr1815: no
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#if __cplusplus >= 201402L
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// FIXME: needs codegen test
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struct A { int &&r = 0; }; // expected-note {{default member init}}
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A a = {}; // FIXME expected-warning {{not supported}}
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struct B { int &&r = 0; }; // expected-error {{binds to a temporary}} expected-note {{default member init}}
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B b; // expected-note {{here}}
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#endif
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}
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namespace dr1872 { // dr1872: 9
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#if __cplusplus >= 201103L
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template<typename T> struct A : T {
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constexpr int f() const { return 0; }
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};
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struct X {};
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struct Y { virtual int f() const; };
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struct Z : virtual X {};
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constexpr int x = A<X>().f();
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constexpr int y = A<Y>().f();
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#if __cplusplus <= 201703L
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// expected-error@-2 {{constant expression}} expected-note@-2 {{call to virtual function}}
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#else
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static_assert(y == 0);
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#endif
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// Note, this is invalid even though it would not use virtual dispatch.
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constexpr int y2 = A<Y>().A<Y>::f();
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#if __cplusplus <= 201703L
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// expected-error@-2 {{constant expression}} expected-note@-2 {{call to virtual function}}
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#else
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static_assert(y == 0);
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#endif
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constexpr int z = A<Z>().f(); // expected-error {{constant expression}} expected-note {{non-literal type}}
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#endif
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}
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namespace dr1881 { // dr1881: 7
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struct A { int a : 4; };
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struct B : A { int b : 3; };
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static_assert(__is_standard_layout(A), "");
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static_assert(!__is_standard_layout(B), "");
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struct C { int : 0; };
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struct D : C { int : 0; };
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static_assert(__is_standard_layout(C), "");
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static_assert(!__is_standard_layout(D), "");
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}
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void dr1891() { // dr1891: 4
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#if __cplusplus >= 201103L
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int n;
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auto a = []{}; // expected-note 0-4{{}}
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auto b = [=]{ return n; }; // expected-note 0-4{{}}
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typedef decltype(a) A;
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typedef decltype(b) B;
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static_assert(!__has_trivial_constructor(A), "");
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#if __cplusplus > 201703L
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// expected-error@-2 {{failed}}
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#endif
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static_assert(!__has_trivial_constructor(B), "");
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// C++20 allows default construction for non-capturing lambdas (P0624R2).
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A x;
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#if __cplusplus <= 201703L
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// expected-error@-2 {{no matching constructor}}
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#endif
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B y; // expected-error {{no matching constructor}}
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// C++20 allows assignment for non-capturing lambdas (P0624R2).
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a = a;
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a = static_cast<A&&>(a);
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#if __cplusplus <= 201703L
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// expected-error@-3 {{copy assignment operator is implicitly deleted}}
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// expected-error@-3 {{copy assignment operator is implicitly deleted}}
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#endif
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b = b; // expected-error {{copy assignment operator is implicitly deleted}}
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b = static_cast<B&&>(b); // expected-error {{copy assignment operator is implicitly deleted}}
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#endif
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}
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