Fix an issue with scoped assignment.

- For loop now work as expected

Sources/Lox/Environment.swift

@@ -53,6 +53,11 @@ public final class Environment {
             return
         }
 
+        if let enclosing {
+            try enclosing.assign(name: name, value: value)
+            return
+        }
+
         throw InterpreterError.runtime(message: "Undefined variable '\(name.lexeme)'.", onLine: name.line, locationDescription: nil)
     }
 }

Sources/Lox/Parser.swift

@@ -68,6 +68,8 @@ public class Parser {
     }
 
     private func forStatement() throws -> Statement {
+        let printer = AbstractSyntaxTreePrinter()
+
         do { try consume(.leftParenthesis) }
         catch { throw reportError("Expect '(' after for 'for'.", token: latestToken) }
 
@@ -80,6 +82,10 @@ public class Parser {
             initializer = try expressionStatement()
         }
 
+        /*if let initializer {
+            print("Initializer: ", printer.toPrint(initializer))
+        }*/
+
         let condition: Expression = matchLatest(.semicolon) ? Literal(value: true) : try expression()
         do { try consume(.semicolon) }
         catch { throw reportError("Expect ';' after loop condition.", token: latestToken) }
@@ -100,6 +106,8 @@ public class Parser {
             body = Block(statements: [initializer, body])
         }
 
+        print(printer.toPrint(body))
+
         return body
     }