From e1d35966438b7729f1f671a423695cceef0af0c8 Mon Sep 17 00:00:00 2001
From: Lukas Werling <lukas.werling@gmail.com>
Date: Sat, 30 May 2015 22:17:58 +0200
Subject: [PATCH] Allow trailing comma in map literal

---
 src/vm/wren_compiler.c                | 3 +++
 test/language/map/trailing_comma.wren | 7 +++++++
 2 files changed, 10 insertions(+)
 create mode 100644 test/language/map/trailing_comma.wren

diff --git a/src/vm/wren_compiler.c b/src/vm/wren_compiler.c
index 48cc5659..390c7250 100644
--- a/src/vm/wren_compiler.c
+++ b/src/vm/wren_compiler.c
@@ -1853,6 +1853,9 @@ static void map(Compiler* compiler, bool allowAssignment)
     {
       ignoreNewlines(compiler);
 
+      // Map with trailing comma.
+      if (peek(compiler) == TOKEN_RIGHT_BRACE) break;
+
       // Push a copy of the map since the subscript call will consume it.
       emit(compiler, CODE_DUP);
 
diff --git a/test/language/map/trailing_comma.wren b/test/language/map/trailing_comma.wren
new file mode 100644
index 00000000..7dd0a69f
--- /dev/null
+++ b/test/language/map/trailing_comma.wren
@@ -0,0 +1,7 @@
+var map = {
+  "a": 1,
+  "b": 2,
+}
+
+IO.print(map["a"]) // expect: 1
+IO.print(map["b"]) // expect: 2