compat, test: improve {static_,}array_size

1 files changed, 40 insertions, 0 deletions

diff --git a/test/util.cpp b/test/util.cpp
new file mode 100644
index 00000000..48332621
--- /dev/null
+++ b/test/util.cpp
@@ -0,0 +1,40 @@
+#include "app.hpp"
+#include "compat/array-size.hpp"
+
+namespace floormat::Test {
+
+namespace {
+
+struct Foo
+{
+    static constexpr std::array<int, 11> Array_1 = {};
+    static constexpr const void* Array_2[22] = {};
+
+    std::array<int, 33> array_3;
+};
+
+constexpr bool test_array_size()
+{
+    fm_assert(static_array_size<decltype(Foo::Array_1)> == 11);
+    fm_assert(array_size(Foo::Array_1) == 11);
+
+    fm_assert(static_array_size<decltype(Foo::Array_2)> == 22);
+    fm_assert(array_size(&Foo::Array_2) == 22);
+
+    fm_assert(static_array_size<decltype(Foo{}.array_3)> == 33);
+    fm_assert(array_size(Foo{}.array_3) == 33);
+    fm_assert(array_size(&Foo::array_3) == 33);
+
+    fm_assert(static_array_size<const int(&)[44]> == 44);
+
+    return true;
+}
+
+} // namespace
+
+void test_util()
+{
+    static_assert(test_array_size());
+}
+
+} // namespace floormat::Test