[clang] [clang] WIP: Warn on mismatched RequiresCapability attributes (PR #67520)

[Timm Baeder via cfe-commits]

Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>,
Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>,
Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>,
Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>,
Timm =?utf-8?q?Bäder?= <tbaeder at redhat.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/67520 at github.com>


tbaederr wrote:

This example from the failing test should warn I think:
```c++

class Foo {
public:
  void foo1();
  void foo2();
  void foo3(Foo *other);

  template<class T>
  void fooT1(const T& dummy1);

  template<class T>
  void fooT2(const T& dummy2) EXCLUSIVE_LOCKS_REQUIRED(mu_);

  Mutex mu_;
  int a GUARDED_BY(mu_);
};

void Foo::foo2() EXCLUSIVE_LOCKS_REQUIRED(mu_) {
  a = 2;
}
```
Since the definition of `foo2` specifies attributes that aren't present in the previous declaration.

https://github.com/llvm/llvm-project/pull/67520