Refactor Parsing/Runtime

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

Sources/P4Runtime/Protocols.swift

@@ -0,0 +1,47 @@
+// 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
+import P4Lang
+
+protocol EvaluatableParserTransition {
+  func program(execution: ProgramExecution) -> (ParserState, ProgramExecution)
+}
+
+protocol EvaluatableParserTransitionStatement {
+  func transition(execution: ProgramExecution) -> (ParserState, ProgramExecution)
+}
+
+public protocol Execution {
+    func execute() -> (ParserState, ProgramExecution)
+}
+
+public protocol Compilable {
+  associatedtype ToCompile
+  associatedtype Compiled
+  static func compile(_: ToCompile) -> Result<Compiled>
+}
+
+public protocol ParserStateInstance {
+    func execute(program: ProgramExecution) -> (ParserStateInstance, ProgramExecution)
+    func done() -> Bool
+    func current() -> ParserState
+}
+
+public protocol ParserExecution {
+    func execute() -> (ParserState, ProgramExecution)
+}