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-rw-r--r--Eigen/src/Core/util/Macros.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index f59b93608..0f3b428c9 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -1076,11 +1076,13 @@ namespace Eigen {
# endif
#endif
-#ifdef EIGEN_HAS_VARIADIC_TEMPLATES
+#if EIGEN_HAS_VARIADIC_TEMPLATES
// The all function is used to enable a variadic version of eigen_assert which can take a parameter pack as its input.
namespace Eigen {
namespace internal {
-bool all(){ return true; }
+
+inline bool all(){ return true; }
+
template<typename T, typename ...Ts>
bool all(T t, Ts ... ts){ return t && all(ts...); }