Add static_assert on size

1 files changed, 1 insertions, 0 deletions

diff --git a/vespalib/src/vespa/vespalib/util/string_hash.cpp b/vespalib/src/vespa/vespalib/util/string_hash.cpp
index a5212401256..de0865fe86f 100644
--- a/vespalib/src/vespa/vespalib/util/string_hash.cpp
+++ b/vespalib/src/vespa/vespalib/util/string_hash.cpp
@@ -12,6 +12,7 @@ double hash2d(const char *str, size_t len) {
         h = h & 0xffeffffffffffffful;
     }
     double d = 0;
+    static_assert(sizeof(d) == sizeof(h));
     memcpy(&d, &h, sizeof(d));
     return d;
 }