Initial Support For If Statements

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

Sources/P4Lang/Parser.swift

@@ -95,15 +95,6 @@ public struct ParserTransitionStatement {
   }
 }
 
-public struct VariableDeclarationStatement {
-  public var initializer: EvaluatableExpression
-  public var identifier: Identifier
-  public init(identifier: Identifier, withInitializer initializer: EvaluatableExpression) {
-    self.identifier = identifier
-    self.initializer = initializer
-  }
-}
-
 public class ParserState: Equatable, CustomStringConvertible, Comparable {
 
   public private(set) var state_name: String

Sources/P4Lang/Statement.swift

@@ -0,0 +1,54 @@
+// 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 VariableDeclarationStatement {
+  public var initializer: EvaluatableExpression
+  public var identifier: Identifier
+  public init(identifier: Identifier, withInitializer initializer: EvaluatableExpression) {
+    self.identifier = identifier
+    self.initializer = initializer
+  }
+}
+
+public struct ConditionalStatement {
+  public var condition: EvaluatableExpression
+  public var thenn: EvaluatableStatement
+  public var elss: EvaluatableStatement?
+
+  public init(condition: EvaluatableExpression, withThen thenn: EvaluatableStatement) {
+    self.condition = condition
+    self.thenn = thenn
+    self.elss = .none
+  }
+
+  public init(condition: EvaluatableExpression, withThen thenn: EvaluatableStatement, andElse elss: EvaluatableStatement) {
+    self.condition = condition
+    self.thenn = thenn
+    self.elss = elss
+  }
+}
+
+public struct BlockStatement {
+  public var statements: [EvaluatableStatement]
+
+  public init(_ statements: [EvaluatableStatement]) {
+    self.statements = statements
+  }
+
+}