[libcxx-commits] [libcxx] [libc++] Make `<map>` `std::multimap` constexpr as part of P3372R3 (PR #161901)

[Vinay Deshmukh via libcxx-commits]

================
@@ -23,32 +23,36 @@
 #include "DefaultOnly.h"
 #include "min_allocator.h"
 
-int main(int, char**) {
-  {
-    typedef std::multimap<int, DefaultOnly> M;
-    typedef M::iterator R;
-    M m;
+TEST_CONSTEXPR_CXX26
+bool test() {
+  // DefaultOnly::count is static
----------------
vinay-deshmukh wrote:

Got it. Will send a separate patch.

I'm thinking something like:


```
{
    CounterScopeGuard g(0);
    std::map<Counter<...>, ...>
    ...
    Assert(g.value == 3);
}
```

And remove the Counter_base class entirely (and equivalent implementation for Default only)

Does that sound good?

https://github.com/llvm/llvm-project/pull/161901