Move streaming operators to namespace searched by ADL.

1 files changed, 4 insertions, 0 deletions

diff --git a/eval/src/tests/tensor/dense_simple_join_function/dense_simple_join_function_test.cpp b/eval/src/tests/tensor/dense_simple_join_function/dense_simple_join_function_test.cpp
index cac8af2bdce..b0927fd7e90 100644
--- a/eval/src/tests/tensor/dense_simple_join_function/dense_simple_join_function_test.cpp
+++ b/eval/src/tests/tensor/dense_simple_join_function/dense_simple_join_function_test.cpp
@@ -22,6 +22,8 @@ using vespalib::make_string_short::fmt;
 using Primary = DenseSimpleJoinFunction::Primary;
 using Overlap = DenseSimpleJoinFunction::Overlap;
 
+namespace vespalib::tensor {
+
 std::ostream &operator<<(std::ostream &os, Primary primary)
 {
     switch(primary) {
@@ -41,6 +43,8 @@ std::ostream &operator<<(std::ostream &os, Overlap overlap)
     abort();
 }
 
+}
+
 const TensorEngine &prod_engine = DefaultTensorEngine::ref();
 
 EvalFixture::ParamRepo make_params() {