From fc44658dad550e0141bcda6f0ff6fae2cd7b6e2a Mon Sep 17 00:00:00 2001
From: Stephen Williams <steve@icarus.com>
Date: Sun, 6 Nov 2011 09:13:09 -0800
Subject: [PATCH] Handle empty argument list to system function.
 (SystemVerilog)

---
 parse.y | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/parse.y b/parse.y
index 2bab54732..3ede668e6 100644
--- a/parse.y
+++ b/parse.y
@@ -1661,6 +1661,17 @@ expr_primary
 	      yyerror(@1, "error: Empty function argument list requires SystemVerilog.");
 	}
       }
+  | SYSTEM_IDENTIFIER '('  ')'
+      { perm_string tn = lex_strings.make($1);
+	const vector<PExpr*>empty;
+	PECallFunction*tmp = new PECallFunction(tn, empty);
+	FILE_NAME(tmp, @1);
+	delete[]$1;
+	$$ = tmp;
+	if (!gn_system_verilog()) {
+	      yyerror(@1, "error: Empty function argument list requires SystemVerilog.");
+	}
+      }
 
   /* Many of the VAMS built-in functions are available as builtin
      functions with $system_function equivalents. */