Start Rewrite

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

Sources/P4Compiler/Protocols.swift

@@ -16,8 +16,6 @@
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 import Common
-import P4Lang
-import P4Runtime
 import SwiftTreeSitter
 import TreeSitterExtensions
 import TreeSitterP4
@@ -26,33 +24,44 @@ public protocol CompilableValue {
   static func CompileValue(withValue value: String) -> Result<P4DataValue>
 }
 
+public protocol MaybeCompilableType {
+  static func MaybeCompileType(
+    type: SwiftTreeSitter.Node, withContext: ASTCompilerContext
+  ) -> Result<AST.Tipe?>
+}
+
 public protocol CompilableType {
   static func CompileType(
-    type: SwiftTreeSitter.Node, withContext: CompilerContext
-  ) -> Result<P4Type?>
+    type: SwiftTreeSitter.Node, withContext: ASTCompilerContext
+  ) -> Result<AST.Tipe>
 }
-
 public protocol CompilableExpression {
-  static func compile(
-    node: Node, withContext context: CompilerContext
-  ) -> Result<P4Expression?>
-}
-
-public protocol CompilableLValueExpression {
-  static func compile_as_lvalue(
-    node: Node, withContext context: CompilerContext
-  ) -> Result<P4LValueExpression?>
+  static func CompileExpression(
+    node: Node, withContext context: ASTCompilerContext
+  ) -> Result<AST.AnExpression>
 }
 
 public protocol Compilable<C> {
   associatedtype C
   static func Compile(
-    node: Node, withContext context: CompilerContext
+    node: Node, withContext context: ASTCompilerContext
   ) -> Result<C>
 }
 
 public protocol CompilableStatement {
   static func CompileStatement(
-    node: Node, withContext context: CompilerContext
-  ) -> Result<P4Statement>
+    node: Node, withContext context: ASTCompilerContext
+  ) -> Result<AST.AnStatement>
 }
+
+public protocol ASTVisitor<T> {
+  associatedtype T
+  func visit(node: AST.BinaryOperatorExpression, driver: ASTVisitorDriver, context: T) -> Result<T>
+  func visit(node: AST.Literal, driver: ASTVisitorDriver, context: T) -> Result<T>
+  func visit(node: AST.Identifier, driver: ASTVisitorDriver, context: T) -> Result<T>
+
+  func visit(node: AST.Parser, driver: ASTVisitorDriver, context: T) -> Result<T>
+  func visit(node: AST.ParserStateDirectTransition, driver: ASTVisitorDriver, context: T) -> Result<T>
+  func visit(node: AST.ParserStateNoTransition, driver: ASTVisitorDriver, context: T) -> Result<T>
+  func visit(node: AST.ParserStateSelectTransition, driver: ASTVisitorDriver, context: T) -> Result<T>
+}