Hi!
Another non-problematic attribute.
Tested on x86_64-linux and i686-linux, ok for trunk?
2024-09-05 Jakub Jelinek <ja...@redhat.com>
PR c++/110345
* g++.dg/cpp0x/attr-no_unique_address1.C: New test.
--- gcc/testsuite/g++.dg/cpp0x/attr-no_unique_address1.C.jj 2024-09-05
14:01:00.396886959 +0200
+++ gcc/testsuite/g++.dg/cpp0x/attr-no_unique_address1.C 2024-09-05
14:11:04.710883438 +0200
@@ -0,0 +1,151 @@
+// C++ 26 P2552R3 - On the ignorability of standard attributes
+// { dg-do compile { target c++11 } }
+
+int arr[2];
+struct S { int a, b; };
+S arr2[2];
+
+struct S2 {
+ [[no_unique_address]] struct {} a;
+ [[no_unique_address ("foobar")]] struct {} b; // { dg-error
"'no_unique_address' attribute does not take any arguments" }
+ [[no_unique_address (0)]] struct {} c; // { dg-error
"'no_unique_address' attribute does not take any arguments" }
+ struct {} d [[no_unique_address]];
+};
+
+void
+foo (int n)
+{
+ auto a = [] [[no_unique_address]] () { }; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ auto b = [] constexpr [[no_unique_address]] {}; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+ // { dg-error
"parameter declaration before lambda declaration specifiers only optional with"
"" { target c++20_down } .-1 }
+ // { dg-error
"'constexpr' lambda only available with" "" { target c++14_down } .-2 }
+ auto c = [] noexcept [[no_unique_address]] {}; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+ // { dg-error
"parameter declaration before lambda exception specification only optional
with" "" { target c++20_down } .-1 }
+ auto d = [] () [[no_unique_address]] {}; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+ auto e = new int [n] [[no_unique_address]]; // { dg-warning
"attributes ignored on outermost array type in new expression" }
+ auto e2 = new int [n] [[no_unique_address]] [42]; // { dg-warning
"attributes ignored on outermost array type in new expression" }
+ auto f = new int [n][42] [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+ [[no_unique_address]]; // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] {} // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] if (true) {} // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] while (false) {} // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] goto lab; // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] lab:; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] try {} catch (int) {} // { dg-warning
"attributes at the beginning of statement are ignored" }
+ if ([[no_unique_address]] int x = 0) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ switch (n)
+ {
+ [[no_unique_address]] case 1: // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] break; // { dg-warning
"attributes at the beginning of statement are ignored" }
+ [[no_unique_address]] default: // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ break;
+ }
+ for ([[no_unique_address]] auto a : arr) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ for ([[no_unique_address]] auto [a, b] : arr2) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ // { dg-error
"structured bindings only available with" "" { target c++14_down } .-1 }
+ [[no_unique_address]] asm (""); // { dg-warning
"attributes ignored on 'asm' declaration" }
+ try {} catch ([[no_unique_address]] int x) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ try {} catch ([[no_unique_address]] int) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ try {} catch (int [[no_unique_address]] x) {} // { dg-warning
"attribute ignored" }
+ try {} catch (int [[no_unique_address]]) {} // { dg-warning
"attribute ignored" }
+ try {} catch (int x [[no_unique_address]]) {} // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+}
+
+[[no_unique_address]] int bar (); // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+using foobar [[no_unique_address]] = int; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+[[no_unique_address]] int a; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+[[no_unique_address]] auto [b, c] = arr; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ // { dg-error
"structured bindings only available with" "" { target c++14_down } .-1 }
+[[no_unique_address]]; // { dg-warning
"attribute ignored" }
+inline [[no_unique_address]] void baz () {} // { dg-warning
"attribute ignored" }
+ // { dg-error "standard
attributes in middle of decl-specifiers" "" { target *-*-* } .-1 }
+constexpr [[no_unique_address]] int qux () { return 0; } // { dg-warning
"attribute ignored" }
+ // { dg-error "standard
attributes in middle of decl-specifiers" "" { target *-*-* } .-1 }
+int [[no_unique_address]] d; // { dg-warning
"attribute ignored" }
+int const [[no_unique_address]] e = 1; // { dg-warning
"attribute ignored" }
+struct A {} [[no_unique_address]]; // { dg-warning
"attribute ignored in declaration of 'struct A'" }
+struct A [[no_unique_address]]; // { dg-warning
"attribute ignored" }
+struct A [[no_unique_address]] a1; // { dg-warning
"attribute ignored" }
+A [[no_unique_address]] a2; // { dg-warning
"attribute ignored" }
+enum B { B0 } [[no_unique_address]]; // { dg-warning
"attribute ignored in declaration of 'enum B'" }
+enum B [[no_unique_address]]; // { dg-warning
"attribute ignored" }
+enum B [[no_unique_address]] b1; // { dg-warning
"attribute ignored" }
+B [[no_unique_address]] b2; // { dg-warning
"attribute ignored" }
+struct [[no_unique_address]] C {}; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int f [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+int g[2] [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int g2 [[no_unique_address]] [2]; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+int corge () [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int *[[no_unique_address]] h; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int & [[no_unique_address]] i = f; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int && [[no_unique_address]] j = 0; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int S::* [[no_unique_address]] k; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+auto l = sizeof (int [2] [[no_unique_address]]); // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+int freddy ([[no_unique_address]] int a, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int c = 0, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int = 0); // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+void
+corge ([[no_unique_address]] int a, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int c = 0, // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int = 0) // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+{
+}
+[[no_unique_address]] void
+garply () // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+{
+}
+int grault (int [[no_unique_address]] a, // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]], // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]] c = 0, // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]] = 0); // { dg-warning
"attribute ignored" }
+void
+waldo (int [[no_unique_address]] a, // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]], // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]] c = 0, // { dg-warning
"attribute ignored" }
+ int [[no_unique_address]] = 0) // { dg-warning
"attribute ignored" }
+{
+}
+int plugh (int a [[no_unique_address]], // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ int b [[no_unique_address]] = 0); // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+void
+thud (int a [[no_unique_address]], // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ int b [[no_unique_address]] = 0) // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+{
+}
+enum [[no_unique_address]] D { D0 }; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+enum class [[no_unique_address]] E { E0 }; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+enum F {};
+enum [[no_unique_address]] F; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+enum G {
+ G0 [[no_unique_address]], // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ G1 [[no_unique_address]] = 2 // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+};
+namespace [[no_unique_address]] H { using H0 = int; } // { dg-warning
"'no_unique_address' attribute directive ignored" }
+namespace [[no_unique_address]] {} // { dg-warning
"'no_unique_address' attribute directive ignored" }
+[[no_unique_address]] using namespace H; // { dg-warning
"'no_unique_address' attribute directive ignored" }
+struct [[no_unique_address]] I // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+{
+ [[no_unique_address]]; // { dg-error
"declaration does not declare anything" }
+ [[no_unique_address]] int i;
+ [[no_unique_address]] int foo (); // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int bar () { return 1; } // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ [[no_unique_address]] int : 0; // { dg-warning
"'no_unique_address' attribute cannot be applied to a bit-field" }
+ [[no_unique_address]] int i2 : 5; // { dg-warning
"'no_unique_address' attribute cannot be applied to a bit-field" }
+ [[no_unique_address]] static int i3; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+ static int i4;
+};
+[[no_unique_address]] int I::i4 = 0; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+struct J : [[no_unique_address]] C {}; // { dg-warning
"attributes on base specifiers are ignored" }
+#if __cpp_concepts >= 201907L
+template <typename T>
+concept K [[no_unique_address]] = requires { true; }; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members"
"" { target c++20 } }
+#endif
+typedef int L [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
+template <typename T>
+struct M {};
+template <>
+struct [[no_unique_address]] M<int> { int m; }; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+typedef int N[2] [[no_unique_address]]; // { dg-warning
"'no_unique_address' attribute does not apply to types" }
+typedef int O [[no_unique_address]] [2]; // { dg-warning
"'no_unique_address' attribute can only be applied to non-static data members" }
Jakub
