Frail fix for batch_constant documentation

Author: serge-sans-paille

docs/source/api/xsimd_batch_constant.rst

@@ -13,6 +13,20 @@ Batch of constants
    :project: xsimd
    :members:
 
+.. doxygenstruct:: xsimd::batch_bool_constant
+   :project: xsimd
+   :members:
+
 
 .. doxygenfunction:: xsimd::make_batch_constant
    :project: xsimd
+
+
+.. doxygenfunction:: xsimd::make_batch_bool_constant
+   :project: xsimd
+
+.. note::
+
+   :cpp:func:`make_batch_constant` and :cpp:func:`make_batch_bool_constant` also
+   accept a scalar value instead of a generator. In that case, that value is
+   broadcast to each slot of the constant batch.

include/xsimd/types/xsimd_batch_constant.hpp

@@ -302,6 +302,20 @@ namespace xsimd
         return {};
     }
 
+    /**
+     * @brief Build a @c batch_bool_constant out of a generator function
+     *
+     * Similar to @c make_batch_constant for @c batch_bool_constant
+     */
+    template <typename T, class G, class A = default_arch>
+    XSIMD_INLINE constexpr decltype(detail::make_batch_bool_constant<T, G, A>(detail::make_index_sequence<batch<T, A>::size>()))
+    make_batch_bool_constant() noexcept
+    {
+        return {};
+    }
+
+// FIXME: Skipping those for doxygen because of bad interaction with breathe.
+#ifdef DOXYGEN_SHOULD_SKIP_THIS
     /**
      * @brief Build a @c batch_constant with a single repeated value.
      *
@@ -316,19 +330,10 @@ namespace xsimd
         return {};
     }
 
-    template <typename T, class G, class A = default_arch>
-    XSIMD_INLINE constexpr decltype(detail::make_batch_bool_constant<T, G, A>(detail::make_index_sequence<batch<T, A>::size>()))
-    make_batch_bool_constant() noexcept
-    {
-        return {};
-    }
-
-    /**
+    /*
      * @brief Build a @c batch_bool_constant with a single repeated value.
      *
-     * @tparam T type of the data held in the batch.
-     * @tparam Val The value to repeat.
-     * @tparam A Architecture that will be used when converting to a regular batch.
+     * Similar to @c make_batch_constant for @c batch_bool_constant
      */
     template <typename T, bool Val, class A = default_arch>
     XSIMD_INLINE constexpr decltype(detail::make_batch_bool_constant<T, Val, A>(detail::make_index_sequence<batch<T, A>::size>()))
@@ -337,6 +342,8 @@ namespace xsimd
         return {};
     }
 
+#endif
+
 } // namespace xsimd
 
 #endif