Allow trailing commas when writing a compound

source/toy_parser.c

@@ -168,6 +168,10 @@ static Toy_Opcode compound(Toy_Parser* parser, Toy_ASTNode** nodeHandle) {
 			consume(parser, TOY_TOKEN_COMMA, "Expected ',' in array or dictionary");
 		}
 
+		if (match(parser, TOY_TOKEN_BRACKET_RIGHT)) { //allow for trailing commas
+			break;
+		}
+
 		iterations++;
 
 		Toy_ASTNode* left = NULL;

test/scripts/trailing-comma-bugfix.toy

@@ -0,0 +1,8 @@
+var array = [
+    1, 2, 3,
+    4, 5, 6,
+    7, 8, 9, //explicitly leave a trailing comma
+];
+
+
+print "All good";

test/test_interpreter.c

@@ -140,6 +140,7 @@ int main() {
 			"polyfill-remove.toy",
 			"short-circuiting-support.toy",
 			"ternary-expressions.toy",
+			"trailing-comma-bugfix.toy",
 			"types.toy",
 			NULL
 		};