[libcxx-commits] [libcxx] [libc++] P2165R4: Update deduction guides for map containers and container adaptors (PR #136011)

[A. Jiang via libcxx-commits]

================
@@ -101,6 +103,18 @@ int main(int, char**) {
     std::map m(PC{1, 1L});
     // expected-error-re at -1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}map'}}
   }
-
+  {
+    // cannot deduce from tuple-like objects without proper iterator
+    std::tuple<int, double> t{1, 2.0};
+    std::map m(t);
+    // expected-error-re at -1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}map'}}
+  }
+  {
+    // cannot deduce from array-like objects without proper iterator
+    std::array<int, 2> arr{1, 2};
+    std::map m(arr);
+    // expected-error-re at -1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}map'}}
+  }
+  
----------------
frederick-vs-ja wrote:

LGTM with format issue resolved.
```suggestion

```

https://github.com/llvm/llvm-project/pull/136011