Add regression test for #1217: Unpacked array literal parsing

This bug was fixed by the #1265 fix. The error 'Array needs an array
index here' no longer occurs for unpacked array literals in
continuous assignments.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ivtest/ivltests/br_gh1217.v

@@ -0,0 +1,20 @@
+// Test for GitHub issue #1217
+// Unpacked array literal parsing
+module a(output bit b [0:0]);
+  assign b = '{1'b0};
+endmodule
+
+module test;
+  wire bit out_b [0:0];
+
+  a dut(.b(out_b));
+
+  initial begin
+    #1;
+    if (out_b[0] !== 1'b0) begin
+      $display("FAILED: out_b[0] = %b, expected 0", out_b[0]);
+      $finish;
+    end
+    $display("PASSED");
+  end
+endmodule

ivtest/regress-sv.list

@@ -230,6 +230,7 @@ br_gh782b		normal,-g2009		ivltests gold=br_gh782b.gold
 br_gh800		normal,-g2009		ivltests
 br_gh801		normal,-g2012		ivltests
 br_gh801b		normal,-g2012		ivltests
+br_gh1217		normal,-g2012		ivltests
 br_gh1220		normal,-g2012		ivltests
 br_gh1222		CE,-g2009		ivltests gold=br_gh1222.gold
 br_gh1223a		normal,-g2009		ivltests