From 9b7d003ea4e53f63e2edb4524312a49583caa966 Mon Sep 17 00:00:00 2001
From: Zachary Snow <zach@zachjs.com>
Date: Wed, 7 Aug 2019 21:58:20 -0400
Subject: [PATCH] support for empty packages (resolves #9)

---
 src/Language/SystemVerilog/Parser/Parse.y | 2 +-
 test/basic/empty_constructs.sv            | 8 ++++++++
 test/basic/empty_constructs.v             | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 test/basic/empty_constructs.sv
 create mode 100644 test/basic/empty_constructs.v

diff --git a/src/Language/SystemVerilog/Parser/Parse.y b/src/Language/SystemVerilog/Parser/Parse.y
index 83d74dc..3e3e460 100644
--- a/src/Language/SystemVerilog/Parser/Parse.y
+++ b/src/Language/SystemVerilog/Parser/Parse.y
@@ -570,7 +570,7 @@ DefparamAsgn :: { (LHS, Expr) }
   : LHS "=" Expr { ($1, $3) }
 
 PackageItems :: { [PackageItem] }
-  : PackageItem              { $1 }
+  : {- empty -}              { [] }
   | PackageItems PackageItem { $1 ++ $2 }
 PackageItem :: { [PackageItem] }
   : DeclTokens(";")    { map Decl $ parseDTsAsDecls $1 }
diff --git a/test/basic/empty_constructs.sv b/test/basic/empty_constructs.sv
new file mode 100644
index 0000000..3d43442
--- /dev/null
+++ b/test/basic/empty_constructs.sv
@@ -0,0 +1,8 @@
+task fun;
+endtask
+function fun;
+endfunction
+package pop;
+endpackage
+module top;
+endmodule
diff --git a/test/basic/empty_constructs.v b/test/basic/empty_constructs.v
new file mode 100644
index 0000000..4a271fc
--- /dev/null
+++ b/test/basic/empty_constructs.v
@@ -0,0 +1,2 @@
+module top;
+endmodule