llvm-project/clang/test/SemaObjCXX/attr-trivial-abi.mm

// RUN: %clang_cc1 -std=c++11 -fobjc-runtime-has-weak -fobjc-weak -fobjc-arc -fsyntax-only -verify %s

void __attribute__((trivial_abi)) foo(); // expected-warning {{'trivial_abi' attribute only applies to classes}}

struct [[clang::trivial_abi]] S0 {
  int a;
};

struct __attribute__((trivial_abi)) S1 {
  int a;
};

struct __attribute__((trivial_abi)) S2 { // expected-warning {{'trivial_abi' cannot be applied to 'S2'}}
  __weak id a;
};

struct __attribute__((trivial_abi)) S3 { // expected-warning {{'trivial_abi' cannot be applied to 'S3'}}
  virtual void m();
};

struct S4 {
  int a;
};

struct __attribute__((trivial_abi)) S5 : public virtual S4 { // expected-warning {{'trivial_abi' cannot be applied to 'S5'}}
};

struct __attribute__((trivial_abi)) S9 : public S4 {
};

struct S6 {
  __weak id a;
};

struct __attribute__((trivial_abi)) S12 { // expected-warning {{'trivial_abi' cannot be applied to 'S12'}}
  __weak id a;
};

struct __attribute__((trivial_abi)) S13 { // expected-warning {{'trivial_abi' cannot be applied to 'S13'}}
  __weak id a[2];
};

struct __attribute__((trivial_abi)) S7 { // expected-warning {{'trivial_abi' cannot be applied to 'S7'}}
  S6 a;
};

struct __attribute__((trivial_abi)) S11 { // expected-warning {{'trivial_abi' cannot be applied to 'S11'}}
  S6 a[2];
};

struct __attribute__((trivial_abi(1))) S8 { // expected-error {{'trivial_abi' attribute takes no arguments}}
  int a;
};

// Do not warn when 'trivial_abi' is used to annotate a template class.
template<class T>
struct __attribute__((trivial_abi)) S10 {
  T p;
};

S10<int *> p1;
S10<__weak id> p2;

template<>
struct __attribute__((trivial_abi)) S10<id> { // expected-warning {{'trivial_abi' cannot be applied to 'S10<id>'}}
  __weak id a;
};

template<class T>
struct S14 {
  T a;
  __weak id b;
};

template<class T>
struct __attribute__((trivial_abi)) S15 : S14<T> {
};

S15<int> s15;

template<class T>
struct __attribute__((trivial_abi)) S16 {
  S14<T> a;
};

S16<int> s16;

template<class T>
struct __attribute__((trivial_abi)) S17 { // expected-warning {{'trivial_abi' cannot be applied to 'S17'}}
  __weak id a;
};

S17<int> s17;