1 files changed, 22 insertions, 0 deletions
diff --git a/src/com/craftinginterpreters/lox/Parser.java b/src/com/craftinginterpreters/lox/Parser.java
index df3ce3f..c427bc4 100644
--- a/src/com/craftinginterpreters/lox/Parser.java
+++ b/src/com/craftinginterpreters/lox/Parser.java
@@ -33,6 +33,8 @@ class Parser {
 
     private Stmt declaration() {
         try {
+            if (match(FUN))
+                return function("function");
             if (match(VAR))
                 return varDeclaration();
 
@@ -145,6 +147,26 @@ class Parser {
         return new Stmt.Expression(expr);
     }
 
+    private Stmt.Function function(String kind) {
+        Token name = consume(IDENTIFIER, "Expect " + kind + " name.");
+        consume(LEFT_PAREN, "Expect '(' after " + kind + " name.");
+        List<Token> parameters = new ArrayList();
+        if (!check(RIGHT_PAREN)) {
+            do {
+                if (parameters.size() >= 255) {
+                    error(peek(), "Can't have more than 255 parameters.");
+                }
+
+                parameters.add(consume(IDENTIFIER, "Expect parameter name."));
+            } while (match(COMMA));
+        }
+        consume(RIGHT_PAREN, "Expect ')' after parameters.");
+
+        consume(LEFT_BRACE, "Expect '{' before " + kind + " body.");
+        List<Stmt> body = block();
+        return new Stmt.Function(name, parameters, body);
+    }
+
     private List<Stmt> block() {
         List<Stmt> statements = new ArrayList<>();