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-rw-r--r--boost/spirit/home/x3/operator/detail/alternative.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/boost/spirit/home/x3/operator/detail/alternative.hpp b/boost/spirit/home/x3/operator/detail/alternative.hpp
index 9fbc4f4dc4..0043710320 100644
--- a/boost/spirit/home/x3/operator/detail/alternative.hpp
+++ b/boost/spirit/home/x3/operator/detail/alternative.hpp
@@ -226,7 +226,7 @@ namespace boost { namespace spirit { namespace x3 { namespace detail
struct move_if_not_alternative
{
template<typename T1, typename T2>
- static void call(T1& attr_, T2& attr) {}
+ static void call(T1& /* attr_ */, T2& /* attr */) {}
};
template <>