From ca9fd3ae3a1ef5ca1fbe33a83abb12e656a2556f Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Wed, 25 Nov 2020 23:10:58 -0800
Subject: Chapter 8: Add blocks and scopes

---
 src/com/craftinginterpreters/lox/AstPrinter.java | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/com/craftinginterpreters/lox/AstPrinter.java')

diff --git a/src/com/craftinginterpreters/lox/AstPrinter.java b/src/com/craftinginterpreters/lox/AstPrinter.java
index 58376cb..d5163df 100644
--- a/src/com/craftinginterpreters/lox/AstPrinter.java
+++ b/src/com/craftinginterpreters/lox/AstPrinter.java
@@ -1,5 +1,7 @@
 package com.craftinginterpreters.lox;
 
+import java.util.List;
+
 /**
  * AstPrinter
  */
@@ -55,6 +57,11 @@ class AstPrinter implements Expr.Visitor<String>, Stmt.Visitor<String> {
         return expression.expression.accept(this);
     }
 
+    @Override
+    public String visitBlockStmt(Stmt.Block block) {
+        return parenthesize("", block.statements);
+    }
+
     private String parenthesize(String name, Expr... exprs) {
         StringBuilder builder = new StringBuilder();
 
@@ -68,6 +75,19 @@ class AstPrinter implements Expr.Visitor<String>, Stmt.Visitor<String> {
         return builder.toString();
     }
 
+    private String parenthesize(String name, List<Stmt> statements) {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append("(").append(name);
+        for (Stmt statement : statements) {
+            builder.append(" ");
+            builder.append(statement.accept(this));
+        }
+        builder.append(")");
+
+        return builder.toString();
+    }
+
     public static void main(String[] args) {
         Expr expression = new Expr.Binary(
                 new Expr.Unary(new Token(TokenType.MINUS, "-", null, 1), new Expr.Literal(123)),
-- 
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