c++: Add carries_dependency further test coverage [PR110345]
This patch adds additional test coverage for the carries_dependency attribute (unlike other attributes, the attribute actually isn't implemented for real, so we warn even in the cases of valid uses because we ignore those as well). 2024-12-18 Jakub Jelinek <jakub@redhat.com> PR c++/110345 * g++.dg/cpp0x/attr-carries_dependency2.C: New test.
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Jakub Jelinek
Jakub Jelinek
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152
gcc/testsuite/g++.dg/cpp0x/attr-carries_dependency2.C
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152
gcc/testsuite/g++.dg/cpp0x/attr-carries_dependency2.C
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// C++ 26 P2552R3 - On the ignorability of standard attributes
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// { dg-do compile { target c++11 } }
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int arr[2];
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struct S { int a, b; };
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S arr2[2];
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void
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xyzzy (int *a [[carries_dependency]], // { dg-warning "'carries_dependency' attribute ignored" }
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int *b [[carries_dependency (1)]]) // { dg-error "'carries_dependency' attribute does not take any arguments" }
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{ // { dg-error "expected ',' or '...' before 'b'" "" { target *-*-* } .-1 }
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}
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void
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foo (int n)
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{
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[[carries_dependency]] int x1; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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auto a = [] [[carries_dependency]] () {}; // { dg-warning "'carries_dependency' attribute ignored" }
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auto b = [] constexpr [[carries_dependency]] {}; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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// { dg-error "parameter declaration before lambda declaration specifiers only optional with" "" { target c++20_down } .-1 }
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// { dg-error "'constexpr' lambda only available with" "" { target c++14_down } .-2 }
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auto c = [] noexcept [[carries_dependency]] {}; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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// { dg-error "parameter declaration before lambda exception specification only optional with" "" { target c++20_down } .-1 }
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auto d = [] () [[carries_dependency]] {}; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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auto e = new int [n] [[carries_dependency]]; // { dg-warning "attributes ignored on outermost array type in new expression" }
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auto e2 = new int [n] [[carries_dependency]] [42]; // { dg-warning "attributes ignored on outermost array type in new expression" }
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auto f = new int [n][42] [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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[[carries_dependency]]; // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] {} // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] if (true) {} // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] while (false) {} // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] goto lab; // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] lab:; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] try {} catch (int) {} // { dg-warning "attributes at the beginning of statement are ignored" }
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if ([[carries_dependency]] int x = 0) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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switch (n)
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{
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[[carries_dependency]] case 1: // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] break; // { dg-warning "attributes at the beginning of statement are ignored" }
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[[carries_dependency]] default: // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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break;
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}
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for ([[carries_dependency]] auto a : arr) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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for ([[carries_dependency]] auto [a, b] : arr2) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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// { dg-error "structured bindings only available with" "" { target c++14_down } .-1 }
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[[carries_dependency]] asm (""); // { dg-warning "attributes ignored on 'asm' declaration" }
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try {} catch ([[carries_dependency]] int x) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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try {} catch ([[carries_dependency]] int) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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try {} catch (int [[carries_dependency]] x) {} // { dg-warning "attribute ignored" }
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try {} catch (int [[carries_dependency]]) {} // { dg-warning "attribute ignored" }
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try {} catch (int x [[carries_dependency]]) {} // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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}
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[[carries_dependency]] int bar (); // { dg-warning "'carries_dependency' attribute ignored" }
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using foobar [[carries_dependency]] = int; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] int a; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] auto [b, c] = arr; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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// { dg-error "structured bindings only available with" "" { target c++14_down } .-1 }
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[[carries_dependency]]; // { dg-warning "attribute ignored" }
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inline [[carries_dependency]] void baz () {} // { dg-warning "attribute ignored" }
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// { dg-error "standard attributes in middle of decl-specifiers" "" { target *-*-* } .-1 }
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constexpr [[carries_dependency]] int qux () { return 0; } // { dg-warning "attribute ignored" }
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// { dg-error "standard attributes in middle of decl-specifiers" "" { target *-*-* } .-1 }
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int [[carries_dependency]] d; // { dg-warning "attribute ignored" }
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int const [[carries_dependency]] e = 1; // { dg-warning "attribute ignored" }
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struct A {} [[carries_dependency]]; // { dg-warning "attribute ignored in declaration of 'struct A'" }
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struct A [[carries_dependency]]; // { dg-warning "attribute ignored" }
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struct A [[carries_dependency]] a1; // { dg-warning "attribute ignored" }
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A [[carries_dependency]] a2; // { dg-warning "attribute ignored" }
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enum B { B0 } [[carries_dependency]]; // { dg-warning "attribute ignored in declaration of 'enum B'" }
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enum B [[carries_dependency]]; // { dg-warning "attribute ignored" }
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enum B [[carries_dependency]] b1; // { dg-warning "attribute ignored" }
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B [[carries_dependency]] b2; // { dg-warning "attribute ignored" }
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struct [[carries_dependency]] C {}; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int f [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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int g[2] [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int g2 [[carries_dependency]] [2]; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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int corge () [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int *[[carries_dependency]] h; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int & [[carries_dependency]] i = f; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int && [[carries_dependency]] j = 0; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int S::* [[carries_dependency]] k; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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auto l = sizeof (int [2] [[carries_dependency]]); // { dg-warning "'carries_dependency' attribute does not apply to types" }
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int freddy ([[carries_dependency]] int a, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int c = 0, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int = 0); // { dg-warning "'carries_dependency' attribute ignored" }
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void
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corge ([[carries_dependency]] int a, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int c = 0, // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int = 0) // { dg-warning "'carries_dependency' attribute ignored" }
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{
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}
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[[carries_dependency]] void
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garply () // { dg-warning "'carries_dependency' attribute ignored" }
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{
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}
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int grault (int [[carries_dependency]] a, // { dg-warning "attribute ignored" }
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int [[carries_dependency]], // { dg-warning "attribute ignored" }
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int [[carries_dependency]] c = 0, // { dg-warning "attribute ignored" }
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int [[carries_dependency]] = 0); // { dg-warning "attribute ignored" }
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void
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waldo (int [[carries_dependency]] a, // { dg-warning "attribute ignored" }
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int [[carries_dependency]], // { dg-warning "attribute ignored" }
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int [[carries_dependency]] c = 0, // { dg-warning "attribute ignored" }
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int [[carries_dependency]] = 0) // { dg-warning "attribute ignored" }
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{
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}
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int plugh (int a [[carries_dependency]], // { dg-warning "'carries_dependency' attribute ignored" }
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int b [[carries_dependency]] = 0); // { dg-warning "'carries_dependency' attribute ignored" }
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void
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thud (int a [[carries_dependency]], // { dg-warning "'carries_dependency' attribute ignored" }
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int b [[carries_dependency]] = 0) // { dg-warning "'carries_dependency' attribute ignored" }
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{
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}
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enum [[carries_dependency]] D { D0 }; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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enum class [[carries_dependency]] E { E0 }; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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enum F {};
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enum [[carries_dependency]] F; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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enum G {
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G0 [[carries_dependency]], // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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G1 [[carries_dependency]] = 2 // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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};
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namespace [[carries_dependency]] H { using H0 = int; } // { dg-warning "'carries_dependency' attribute directive ignored" } */
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namespace [[carries_dependency]] {} // { dg-warning "'carries_dependency' attribute directive ignored" }
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[[carries_dependency]] using namespace H; // { dg-warning "'carries_dependency' attribute directive ignored" }
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struct [[carries_dependency]] I // { dg-warning "'carries_dependency' attribute does not apply to types" }
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{
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[[carries_dependency]]; // { dg-error "declaration does not declare anything" }
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[[carries_dependency]] int i; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] int foo (); // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int bar () { return 1; } // { dg-warning "'carries_dependency' attribute ignored" }
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[[carries_dependency]] int : 0; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] int i2 : 5; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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[[carries_dependency]] static int i3; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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static int i4;
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};
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[[carries_dependency]] int I::i4 = 0; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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struct J : [[carries_dependency]] C {}; // { dg-warning "attributes on base specifiers are ignored" }
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#if __cpp_concepts >= 201907L
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template <typename T>
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concept K [[carries_dependency]] = requires { true; }; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" "" { target c++20 } }
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#endif
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typedef int L [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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template <typename T>
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struct M {};
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template <>
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struct [[carries_dependency]] M<int> { int m; }; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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typedef int N[2] [[carries_dependency]]; // { dg-warning "'carries_dependency' attribute does not apply to types" }
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typedef int O [[carries_dependency]] [2]; // { dg-warning "'carries_dependency' attribute can only be applied to functions or parameters" }
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