FTL: Prevent InitializerList overflow

Users so far use the deduction guide, but this should not compile:

    ftl::StaticVector<int, 1> vector = ftl::init::list<int>(0)(1);

Bug: 185536303
Test: m ftl_test
Change-Id: Icc1263ebdb9326948f0fc2f9c9f01f21b0b8302d

1 files changed, 3 insertions, 1 deletions

diff --git a/include/ftl/static_vector.h b/include/ftl/static_vector.h
index b7f8c29dec..70f1721d4a 100644
--- a/include/ftl/static_vector.h
+++ b/include/ftl/static_vector.h
@@ -178,7 +178,9 @@ class StaticVector final : details::ArrayTraits<T>,
   template <typename U, std::size_t Size, std::size_t... Sizes, typename... Types>
   StaticVector(InitializerList<U, std::index_sequence<Size, Sizes...>, Types...>&& list)
       : StaticVector(std::index_sequence<0, 0, Size>{}, std::make_index_sequence<Size>{},
-                     std::index_sequence<Sizes...>{}, list.tuple) {}
+                     std::index_sequence<Sizes...>{}, list.tuple) {
+    static_assert(sizeof...(Sizes) < N, "Too many elements");
+  }
 
   ~StaticVector() { std::destroy(begin(), end()); }