Refactor P4Compiler to P4Parser

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

Sources/P4Parser/Protocols.swift

@@ -0,0 +1,73 @@
+// 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 SwiftTreeSitter
+import TreeSitterExtensions
+import TreeSitterP4
+
+/*
+public protocol CompilableValue {
+  static func CompileValue(withValue value: String) -> Result<P4DataValue>
+}
+*/
+
+public protocol MaybeParsableType {
+  static func MaybeParseType(
+    type: SwiftTreeSitter.Node, withContext: CSTCompilerContext
+  ) -> Result<CST.Tipe?>
+}
+
+public protocol ParsableType {
+  static func ParseType(
+    type: SwiftTreeSitter.Node, withContext: CSTCompilerContext
+  ) -> Result<CST.Tipe>
+}
+public protocol ParsableExpression {
+  static func ParseExpression(
+    node: Node, withContext context: CSTCompilerContext
+  ) -> Result<CST.AnExpression>
+}
+
+public protocol Parsable<C> {
+  associatedtype C
+  static func Parse(
+    node: Node, withContext context: CSTCompilerContext
+  ) -> Result<C>
+}
+
+public protocol ParsableStatement {
+  static func ParseStatement(
+    node: Node, withContext context: CSTCompilerContext
+  ) -> Result<CST.Statement>
+}
+
+public protocol CSTVisitor<T> {
+  associatedtype T
+  func visit(node: CST.BinaryOperatorExpression, driver: CSTVisitorDriver, context: T) -> Result<T>
+  func visit(node: CST.Literal, driver: CSTVisitorDriver, context: T) -> Result<T>
+  func visit(node: CST.Identifier, driver: CSTVisitorDriver, context: T) -> Result<T>
+
+  func visit(node: CST.Parser, driver: CSTVisitorDriver, context: T) -> Result<T>
+  func visit(
+    node: CST.ParserStateDirectTransition, driver: CSTVisitorDriver, context: T
+  ) -> Result<T>
+  func visit(node: CST.ParserStateNoTransition, driver: CSTVisitorDriver, context: T) -> Result<T>
+  func visit(
+    node: CST.ParserStateSelectTransition, driver: CSTVisitorDriver, context: T
+  ) -> Result<T>
+}