Parse Struct Declarations

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>

Sources/P4Lang/Declarations.swift

@@ -0,0 +1,20 @@
+// p4rse, Copyright 2026, Will Hawkins
+//
+// This file is part of p4rse.
+//
+// This file is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import Common
+
+public struct Declaration {}

Sources/P4Lang/Program.swift

@@ -23,6 +23,7 @@ public struct ExpressionStatement {
 
 public struct Program {
   public var types: [P4Type] = Array()
+  public var instances: [P4Type] = Array()
 
   /// Find the program's main parser
   ///
@@ -32,8 +33,8 @@ public struct Program {
   }
 
   public func find_parser(withName name: Identifier) -> Result<Parser> {
-    for type in self.types {
-      guard let parser = type as? Parser else {
+    for instances in self.instances {
+      guard let parser = instances as? Parser else {
         continue
       }
       if parser.name == name {