1 files changed, 91 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/fn_diff.hpp b/src/armadillo/include/armadillo_bits/fn_diff.hpp
new file mode 100644
index 0000000..2d7e8d3
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/fn_diff.hpp
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: Apache-2.0
+// 
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup fn_diff
+//! @{
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename
+enable_if2
+  <
+  is_arma_type<T1>::value && resolves_to_vector<T1>::yes,
+  const Op<T1, op_diff_vec>
+  >::result
+diff
+  (
+  const T1&   X,
+  const uword k = 1
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  return Op<T1, op_diff_vec>(X, k, 0);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename
+enable_if2
+  <
+  is_arma_type<T1>::value && resolves_to_vector<T1>::no,
+  const Op<T1, op_diff>
+  >::result
+diff
+  (
+  const T1&   X,
+  const uword k = 1
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  return Op<T1, op_diff>(X, k, 0);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename
+enable_if2
+  <
+  is_arma_type<T1>::value,
+  const Op<T1, op_diff>
+  >::result
+diff
+  (
+  const T1&   X,
+  const uword k,
+  const uword dim
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  return Op<T1, op_diff>(X, k, dim);
+  }
+
+
+
+//! @}