[libcxx-commits] [libcxx] [libc++][ranges] add static_assert for ranges::to (PR #135802)

[A. Jiang via libcxx-commits]

================
@@ -0,0 +1,17 @@
+#include <ranges>
+
+
+
+void test(){
+    struct R {
+        int* begin() const{reurn nullptr;};
+        int* end() const{return nullptr;};
+    
+        operator int() const { return 0; }
+      };
+      (void)std::ranges::to<int>(R{});
+        //expected-error-re@*:* {{static assertion failed{{.*}}The target must be a class type}}
+      (void)(R{} | std::ranges::to<int>());
+        //expected-error-re@*:* {{static assertion failed{{.*}}The target must be a class type}}
+    
+}
----------------
frederick-vs-ja wrote:

We conventionally add an empty line to the end of the file unless there's specific reason about lack of ending empty line.
```suggestion
}

```

https://github.com/llvm/llvm-project/pull/135802