List literals.

test/class_inheritance.wren

@@ -24,3 +24,4 @@ bar.method(1, 2, 3, 4) // expect: bar
 // TODO(bob): Private fields.
 // TODO(bob): Super (or inner) calls.
 // TODO(bob): Grammar for what expressions can follow "is".
+// TODO(bob): Prevent extending built-in types.

test/list_count.wren

@@ -0,0 +1,7 @@
+io.write([].count)           // expect: 0
+io.write([1].count)          // expect: 1
+io.write([1, 2, 3, 4].count) // expect: 4
+
+// TODO(bob): Literal syntax, including newline handling.
+// TODO(bob): Unterminated list literal.
+// TODO(bob): Subscript operator.