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diff --git a/src/armadillo/include/armadillo_bits/fn_trig.hpp b/src/armadillo/include/armadillo_bits/fn_trig.hpp
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+// 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_trig
+//! @{
+
+
+// single argument trigonometric functions:
+// cos family: cos, acos, cosh, acosh
+// sin family: sin, asin, sinh, asinh
+// tan family: tan, atan, tanh, atanh
+// 
+// misc functions:
+// sinc
+// 
+// dual argument trigonometric functions:
+// atan2
+// hypot
+
+
+
+//
+// cos
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_cos> >::result
+cos(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_cos>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_cos>
+cos(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_cos>(A.get_ref());
+  }
+
+
+
+//
+// acos
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_acos> >::result
+acos(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_acos>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_acos>
+acos(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_acos>(A.get_ref());
+  }
+
+
+
+//
+// cosh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_cosh> >::result
+cosh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_cosh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_cosh>
+cosh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_cosh>(A.get_ref());
+  }
+
+
+
+//
+// acosh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_acosh> >::result
+acosh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_acosh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_acosh>
+acosh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_acosh>(A.get_ref());
+  }
+
+
+
+//
+// sin
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_sin> >::result
+sin(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_sin>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_sin>
+sin(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_sin>(A.get_ref());
+  }
+
+
+
+//
+// asin
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_asin> >::result
+asin(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_asin>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_asin>
+asin(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_asin>(A.get_ref());
+  }
+
+
+
+//
+// sinh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_sinh> >::result
+sinh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_sinh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_sinh>
+sinh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_sinh>(A.get_ref());
+  }
+
+
+
+//
+// asinh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_asinh> >::result
+asinh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_asinh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_asinh>
+asinh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_asinh>(A.get_ref());
+  }
+
+
+
+//
+// tan
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_tan> >::result
+tan(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_tan>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_tan>
+tan(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_tan>(A.get_ref());
+  }
+
+
+
+//
+// atan
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_atan> >::result
+atan(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_atan>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_atan>
+atan(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_atan>(A.get_ref());
+  }
+
+
+
+//
+// tanh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_tanh> >::result
+tanh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_tanh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_tanh>
+tanh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_tanh>(A.get_ref());
+  }
+
+
+
+//
+// atanh
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_atanh> >::result
+atanh(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_atanh>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_atanh>
+atanh(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_atanh>(A.get_ref());
+  }
+
+
+
+//
+// sinc
+
+template<typename T>
+arma_warn_unused
+arma_inline
+typename arma_scalar_only<T>::result
+sinc(const T x)
+  {
+  return arma_sinc(x);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_sinc> >::result
+sinc(const T1& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOp<T1, eop_sinc>(A);
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+arma_inline
+const eOpCube<T1, eop_sinc>
+sinc(const BaseCube<typename T1::elem_type,T1>& A)
+  {
+  arma_extra_debug_sigprint();
+  
+  return eOpCube<T1, eop_sinc>(A.get_ref());
+  }
+
+
+
+//
+// atan2
+
+template<typename T1, typename T2>
+arma_warn_unused
+arma_inline
+typename
+enable_if2
+  <
+  (is_arma_type<T1>::value && is_arma_type<T2>::value && is_real<typename T1::elem_type>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
+  const Glue<T1, T2, glue_atan2>
+  >::result
+atan2(const T1& Y, const T2& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  return Glue<T1, T2, glue_atan2>(Y, X);
+  }
+
+
+
+template<typename T1, typename T2>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_real<typename T1::elem_type>::value, const GlueCube<T1, T2, glue_atan2> >::result
+atan2(const BaseCube<typename T1::elem_type,T1>& Y, const BaseCube<typename T1::elem_type,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  return GlueCube<T1, T2, glue_atan2>(Y.get_ref(), X.get_ref());
+  }
+
+
+
+//
+// hypot
+
+template<typename T1, typename T2>
+arma_warn_unused
+arma_inline
+typename
+enable_if2
+  <
+  (is_arma_type<T1>::value && is_arma_type<T2>::value && is_real<typename T1::elem_type>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
+  const Glue<T1, T2, glue_hypot>
+  >::result
+hypot(const T1& X, const T2& Y)
+  {
+  arma_extra_debug_sigprint();
+  
+  return Glue<T1, T2, glue_hypot>(X, Y);
+  }
+
+
+
+template<typename T1, typename T2>
+arma_warn_unused
+arma_inline
+typename enable_if2< is_real<typename T1::elem_type>::value, const GlueCube<T1, T2, glue_hypot> >::result
+hypot(const BaseCube<typename T1::elem_type,T1>& X, const BaseCube<typename T1::elem_type,T2>& Y)
+  {
+  arma_extra_debug_sigprint();
+  
+  return GlueCube<T1, T2, glue_hypot>(X.get_ref(), Y.get_ref());
+  }
+
+
+
+//! @}