1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp2a/array-conv5.C b/gcc/testsuite/g++.dg/cpp2a/array-conv5.C
new file mode 100644
index 00000000000..34678f5cead
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp2a/array-conv5.C
@@ -0,0 +1,24 @@
+// PR c++/91364 - Implement P0388R4: Permit conversions to arrays of unknown bound.
+// { dg-do run { target c++2a } }
+
+// Ranking of list-initialization sequences
+int b(int   (&&)[] ) { return 1; }   // #1
+int b(long  (&&)[] ) { return 2; }   // #2
+int b(int   (&&)[1]) { return 3; }   // #3
+int b(long  (&&)[1]) { return 4; }   // #4
+int b(int   (&&)[2]) { return 5; }   // #5
+
+/* Here,
+   -- #1, #3 and #5 should rank better than both #2 and #4, as no promotion
+      is necessitated.
+   -- #1 should rank worse than #3, being far less specialized.
+   -- #1 should rank better than #5, as the latter requires a larger array
+      temporary.  (#3 also ranks better than #5 for the same reason--cf. core
+      issue 1307).  */
+
+int
+main ()
+{
+  if (b({1}) != 3)
+    __builtin_abort ();
+}