support typedef forward declarations

ad0db916 · Zachary Snow · 1a6e0ce9 · ad0db916
Commit ad0db916 authored Sep 04, 2019 by Zachary Snow
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src/Language/SystemVerilog/Parser/Parse.y
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--- a/src/Language/SystemVerilog/Parser/Parse.y
+++ b/src/Language/SystemVerilog/Parser/Parse.y
@@ -736,6 +736,11 @@ NonDeclPackageItem :: { [PackageItem] }
  | "import" PackageImportItems ";" { map (uncurry Import) $2 }
  | "export" PackageImportItems ";" { map (Export .  Just) $2 }
  | "export" "*" "::" "*" ";"       { [Export Nothing] } -- "Nothing" being no restrictions
+  | ForwardTypedef ";"              { $1 }
+ForwardTypedef :: { [PackageItem] }
+  : "typedef" "enum"   Identifier { [] }
+  | "typedef" "struct" Identifier { [] }
+  | "typedef" "union"  Identifier { [] }
 PackageImportItems :: { [(Identifier, Maybe Identifier)] }
  : PackageImportItem                        { [$1] }