From eda5bc26f44ee9a6f83dcf8c91f17296d7fc509d Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Mon, 12 Feb 2024 14:52:43 +0100
Subject: Move into version control

---
 .../include/armadillo_bits/fn_conv_to.hpp          | 720 +++++++++++++++++++++
 1 file changed, 720 insertions(+)
 create mode 100644 src/armadillo/include/armadillo_bits/fn_conv_to.hpp

(limited to 'src/armadillo/include/armadillo_bits/fn_conv_to.hpp')

diff --git a/src/armadillo/include/armadillo_bits/fn_conv_to.hpp b/src/armadillo/include/armadillo_bits/fn_conv_to.hpp
new file mode 100644
index 0000000..dbfc7fe
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/fn_conv_to.hpp
@@ -0,0 +1,720 @@
+// 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_conv_to
+//! @{
+
+
+
+//! conversion from Armadillo Base and BaseCube objects to scalars
+//! NOTE: use as_scalar() instead; this functionality is kept only for compatibility with old user code
+template<typename out_eT>
+class conv_to
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static out_eT from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+
+  template<typename in_eT, typename T1>
+  inline static out_eT from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static out_eT from(const BaseCube<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static out_eT from(const BaseCube<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+out_eT
+conv_to<out_eT>::from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  arma_type_check(( is_supported_elem_type<out_eT>::value == false ));
+  
+  const Proxy<T1> P(in.get_ref());
+  
+  arma_debug_check( (P.get_n_elem() != 1), "conv_to(): given object does not have exactly one element" );
+  
+  return out_eT(Proxy<T1>::use_at ? P.at(0,0) : P[0]);
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+out_eT
+conv_to<out_eT>::from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  arma_type_check(( is_supported_elem_type<out_eT>::value == false ));
+  
+  const Proxy<T1> P(in.get_ref());
+  
+  arma_debug_check( (P.get_n_elem() != 1), "conv_to(): given object does not have exactly one element" );
+  
+  out_eT out;
+  
+  arrayops::convert_cx_scalar(out, (Proxy<T1>::use_at ? P.at(0,0) : P[0]));
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+out_eT
+conv_to<out_eT>::from(const BaseCube<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  arma_type_check(( is_supported_elem_type<out_eT>::value == false ));
+  
+  const ProxyCube<T1> P(in.get_ref());
+  
+  arma_debug_check( (P.get_n_elem() != 1), "conv_to(): given object does not have exactly one element" );
+  
+  return out_eT(ProxyCube<T1>::use_at ? P.at(0,0,0) : P[0]);
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+out_eT
+conv_to<out_eT>::from(const BaseCube<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  arma_type_check(( is_supported_elem_type<out_eT>::value == false ));
+  
+  const ProxyCube<T1> P(in.get_ref());
+  
+  arma_debug_check( (P.get_n_elem() != 1), "conv_to(): given object does not have exactly one element" );
+  
+  out_eT out;
+  
+  arrayops::convert_cx_scalar(out, (ProxyCube<T1>::use_at ? P.at(0,0,0) : P[0]));
+  
+  return out;
+  }
+
+
+
+//! conversion to Armadillo matrices from Armadillo Base objects, as well as from std::vector
+template<typename out_eT>
+class conv_to< Mat<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static Mat<out_eT> from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static Mat<out_eT> from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  
+  template<typename T1>
+  inline static Mat<out_eT> from(const SpBase<out_eT, T1>& in);
+  
+  
+  
+  template<typename in_eT>
+  inline static Mat<out_eT> from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT>
+  inline static Mat<out_eT> from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Mat<out_eT>
+conv_to< Mat<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  Mat<out_eT> out(X.n_rows, X.n_cols, arma_nozeros_indicator());
+  
+  arrayops::convert( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Mat<out_eT>
+conv_to< Mat<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  Mat<out_eT> out(X.n_rows, X.n_cols, arma_nozeros_indicator());
+  
+  arrayops::convert_cx( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename T1>
+arma_warn_unused
+inline
+Mat<out_eT>
+conv_to< Mat<out_eT> >::from(const SpBase<out_eT, T1>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  return Mat<out_eT>(in.get_ref());
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Mat<out_eT>
+conv_to< Mat<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Mat<out_eT> out(N, 1, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Mat<out_eT>
+conv_to< Mat<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Mat<out_eT> out(N, 1, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert_cx( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+//! conversion to Armadillo row vectors from Armadillo Base objects, as well as from std::vector
+template<typename out_eT>
+class conv_to< Row<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static Row<out_eT> from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static Row<out_eT> from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  
+  
+  
+  template<typename in_eT>
+  inline static Row<out_eT> from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT>
+  inline static Row<out_eT> from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Row<out_eT>
+conv_to< Row<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  Row<out_eT> out(X.n_elem, arma_nozeros_indicator());
+  
+  arrayops::convert( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Row<out_eT>
+conv_to< Row<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  Row<out_eT> out(X.n_rows, X.n_cols, arma_nozeros_indicator());
+  
+  arrayops::convert_cx( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Row<out_eT>
+conv_to< Row<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Row<out_eT> out(N, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Row<out_eT>
+conv_to< Row<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Row<out_eT> out(N, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert_cx( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+//! conversion to Armadillo column vectors from Armadillo Base objects, as well as from std::vector
+template<typename out_eT>
+class conv_to< Col<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static Col<out_eT> from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static Col<out_eT> from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  
+  
+  
+  template<typename in_eT>
+  inline static Col<out_eT> from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT>
+  inline static Col<out_eT> from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Col<out_eT>
+conv_to< Col<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  Col<out_eT> out(X.n_elem, arma_nozeros_indicator());
+  
+  arrayops::convert( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Col<out_eT>
+conv_to< Col<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  Col<out_eT> out(X.n_rows, X.n_cols, arma_nozeros_indicator());
+  
+  arrayops::convert_cx( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Col<out_eT>
+conv_to< Col<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Col<out_eT> out(N, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT>
+arma_warn_unused
+inline
+Col<out_eT>
+conv_to< Col<out_eT> >::from(const std::vector<in_eT>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const uword N = uword( in.size() );
+  
+  Col<out_eT> out(N, arma_nozeros_indicator());
+  
+  if(N > 0)
+    {
+    arrayops::convert_cx( out.memptr(), &(in[0]), N );
+    }
+  
+  return out;
+  }
+
+
+
+//! convert between SpMat types
+template<typename out_eT>
+class conv_to< SpMat<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static SpMat<out_eT> from(const SpBase<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static SpMat<out_eT> from(const SpBase<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  
+  template<typename T1>
+  inline static SpMat<out_eT> from(const Base<out_eT, T1>& in);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+SpMat<out_eT>
+conv_to< SpMat<out_eT> >::from(const SpBase<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const unwrap_spmat<T1>  tmp(in.get_ref());
+  const SpMat<in_eT>& X = tmp.M;
+  
+  SpMat<out_eT> out(arma_layout_indicator(), X);
+  
+  arrayops::convert( access::rwp(out.values), X.values, X.n_nonzero );
+  
+  out.remove_zeros();
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+SpMat<out_eT>
+conv_to< SpMat<out_eT> >::from(const SpBase<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const unwrap_spmat<T1>  tmp(in.get_ref());
+  const SpMat<in_eT>& X = tmp.M;
+  
+  SpMat<out_eT> out(arma_layout_indicator(), X);
+  
+  arrayops::convert_cx( access::rwp(out.values), X.values, X.n_nonzero );
+  
+  out.remove_zeros();
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename T1>
+arma_warn_unused
+inline
+SpMat<out_eT>
+conv_to< SpMat<out_eT> >::from(const Base<out_eT, T1>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  return SpMat<out_eT>(in.get_ref());
+  }
+
+
+
+//! conversion to Armadillo cubes from Armadillo BaseCube objects
+template<typename out_eT>
+class conv_to< Cube<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static Cube<out_eT> from(const BaseCube<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static Cube<out_eT> from(const BaseCube<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Cube<out_eT>
+conv_to< Cube<out_eT> >::from(const BaseCube<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const unwrap_cube<T1>  tmp( in.get_ref() );
+  const Cube<in_eT>& X = tmp.M;
+  
+  Cube<out_eT> out(X.n_rows, X.n_cols, X.n_slices, arma_nozeros_indicator());
+  
+  arrayops::convert( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+Cube<out_eT>
+conv_to< Cube<out_eT> >::from(const BaseCube<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const unwrap_cube<T1>  tmp( in.get_ref() );
+  const Cube<in_eT>& X = tmp.M;
+  
+  Cube<out_eT> out(X.n_rows, X.n_cols, X.n_slices, arma_nozeros_indicator());
+  
+  arrayops::convert_cx( out.memptr(), X.memptr(), X.n_elem );
+  
+  return out;
+  }
+
+
+
+//! conversion to std::vector from Armadillo Base objects
+template<typename out_eT>
+class conv_to< std::vector<out_eT> >
+  {
+  public:
+  
+  template<typename in_eT, typename T1>
+  inline static std::vector<out_eT> from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk = nullptr);
+  
+  template<typename in_eT, typename T1>
+  inline static std::vector<out_eT> from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk = nullptr);
+  };
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+std::vector<out_eT>
+conv_to< std::vector<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_not_cx<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  const uword N = X.n_elem;
+  
+  std::vector<out_eT> out(N);
+  
+  if(N > 0)
+    {
+    arrayops::convert( &(out[0]), X.memptr(), N );
+    }
+  
+  return out;
+  }
+
+
+
+template<typename out_eT>
+template<typename in_eT, typename T1>
+arma_warn_unused
+inline
+std::vector<out_eT>
+conv_to< std::vector<out_eT> >::from(const Base<in_eT, T1>& in, const typename arma_cx_only<in_eT>::result* junk)
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  const quasi_unwrap<T1> tmp(in.get_ref());
+  const Mat<in_eT>& X  = tmp.M;
+  
+  arma_debug_check( ( (X.is_vec() == false) && (X.is_empty() == false) ), "conv_to(): given object cannot be interpreted as a vector" );
+  
+  const uword N = X.n_elem;
+  
+  std::vector<out_eT> out(N);
+  
+  if(N > 0)
+    {
+    arrayops::convert_cx( &(out[0]), X.memptr(), N );
+    }
+  
+  return out;
+  }
+
+
+
+//! @}
-- 
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