From 3b9c44434e8bc395068eb8c3e319e384b66ed72e Mon Sep 17 00:00:00 2001
From: Tom Willemse
Date: Sat, 16 Jan 2021 22:16:31 -0800
Subject: Add while statement

---
 src/com/craftinginterpreters/lox/Parser.java | 11 +++++++++++
 1 file changed, 11 insertions(+)

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

diff --git a/src/com/craftinginterpreters/lox/Parser.java b/src/com/craftinginterpreters/lox/Parser.java
index 1643129..a85d70f 100644
--- a/src/com/craftinginterpreters/lox/Parser.java
+++ b/src/com/craftinginterpreters/lox/Parser.java
@@ -47,6 +47,8 @@ class Parser {
             return ifStatement();
         if (match(PRINT))
             return printStatement();
+        if (match(WHILE))
+            return whileStatement();
         if (match(LEFT_BRACE))
             return new Stmt.Block(block());
 
@@ -85,6 +87,15 @@ class Parser {
         return new Stmt.Var(name, initializer);
     }
 
+    private Stmt whileStatement() {
+        consume(LEFT_PAREN, "Expect '(' after 'while'.");
+        Expr condition = expression();
+        consume(RIGHT_PAREN, "Expect ')' after condition.");
+        Stmt body = statement();
+
+        return new Stmt.While(condition, body);
+    }
+
     private Stmt expressionStatement() {
         Expr expr = expression();
         consume(SEMICOLON, "Expect ';' after expression.");
-- 
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