fix: correct negative axis handling in roll function

Author: f14XuanLv

include/xtensor/misc/xmanipulation.hpp

@@ -1052,17 +1052,15 @@ namespace xt
     {
         auto cpy = empty_like(e);
         const auto& shape = cpy.shape();
-        std::size_t saxis = static_cast<std::size_t>(axis);
-        if (axis < 0)
-        {
-            axis += std::ptrdiff_t(cpy.dimension());
-        }
+        const auto dim = cpy.dimension();
 
-        if (saxis >= cpy.dimension() || axis < 0)
+        if (axis < -static_cast<std::ptrdiff_t>(dim) || axis >= static_cast<std::ptrdiff_t>(dim))
         {
-            XTENSOR_THROW(std::runtime_error, "axis is no within shape dimension.");
+            XTENSOR_THROW(std::runtime_error, "axis is not within shape dimension.");
         }
 
+        std::size_t saxis = normalize_axis(dim, axis);
+
         const auto axis_dim = static_cast<std::ptrdiff_t>(shape[saxis]);
         while (shift < 0)
         {

test/test_xmanipulation.cpp

@@ -502,6 +502,18 @@ namespace xt
 
         xarray<double> expected8 = {{{3, 1, 2}}, {{6, 4, 5}}, {{9, 7, 8}}};
         ASSERT_EQ(expected8, xt::roll(e2, -2, /*axis*/ 2));
+
+        EXPECT_THROW(xt::roll(e2, 1, /*axis*/ 3), std::runtime_error);
+        EXPECT_THROW(xt::roll(e2, 1, /*axis*/ -4), std::runtime_error);
+
+        xarray<double> expected9 = {{{3, 1, 2}}, {{6, 4, 5}}, {{9, 7, 8}}};
+        ASSERT_EQ(expected9, xt::roll(e2, -2, /*axis*/ -1));
+
+        xarray<double> expected10 = {{{1, 2, 3}}, {{4, 5, 6}}, {{7, 8, 9}}};
+        ASSERT_EQ(expected10, xt::roll(e2, -2, /*axis*/ -2));
+
+        xarray<double> expected11 = {{{4, 5, 6}}, {{7, 8, 9}}, {{1, 2, 3}}};
+        ASSERT_EQ(expected11, xt::roll(e2, 2, /*axis*/ -3));
     }
 
     TEST(xmanipulation, repeat_all_elements_of_axis_0_of_int_array_2_times)