RcppCore · eddelbuettel · Oct 20, 2025 · Oct 20, 2025 · Oct 20, 2025
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,12 @@
+2025-10-20  Dirk Eddelbuettel  <[email protected]>
+
+	* DESCRIPTION (Version, Date): RcppArmadillo 15.2.0-0
+        * inst/NEWS.Rd: Idem
+        * configure.ac: Idem
+        * configure: Idem
+
+	* inst/include/current/: Sync with Armadillo 15.2
+
 2025-10-17  Dirk Eddelbuettel  <[email protected]>
 
 	* src/RcppArmadillo.cpp (armadillo_version_typed): Added

diff --git a/configure b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for RcppArmadillo 15.1.99-1.
+# Generated by GNU Autoconf 2.72 for RcppArmadillo 15.2.0-0.
 #
 # Report bugs to <[email protected]>.
 #
@@ -603,8 +603,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='RcppArmadillo'
 PACKAGE_TARNAME='rcpparmadillo'
-PACKAGE_VERSION='15.1.99-1'
-PACKAGE_STRING='RcppArmadillo 15.1.99-1'
+PACKAGE_VERSION='15.2.0-0'
+PACKAGE_STRING='RcppArmadillo 15.2.0-0'
 PACKAGE_BUGREPORT='[email protected]'
 PACKAGE_URL=''
 
@@ -1221,7 +1221,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures RcppArmadillo 15.1.99-1 to adapt to many kinds of systems.
+'configure' configures RcppArmadillo 15.2.0-0 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1283,7 +1283,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of RcppArmadillo 15.1.99-1:";;
+     short | recursive ) echo "Configuration of RcppArmadillo 15.2.0-0:";;
    esac
   cat <<\_ACEOF
 
@@ -1364,7 +1364,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-RcppArmadillo configure 15.1.99-1
+RcppArmadillo configure 15.2.0-0
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -1480,7 +1480,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by RcppArmadillo $as_me 15.1.99-1, which was
+It was created by RcppArmadillo $as_me 15.2.0-0, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3977,7 +3977,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by RcppArmadillo $as_me 15.1.99-1, which was
+This file was extended by RcppArmadillo $as_me 15.2.0-0, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -4032,7 +4032,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-RcppArmadillo config.status 15.1.99-1
+RcppArmadillo config.status 15.2.0-0
 configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 

diff --git a/configure.ac b/configure.ac
@@ -11,7 +11,7 @@
 AC_PREREQ([2.69])
 
 ## Process this file with autoconf to produce a configure script.
-AC_INIT([RcppArmadillo],[15.1.99-1],[[email protected]])
+AC_INIT([RcppArmadillo],[15.2.0-0],[[email protected]])
 
 ## Set R_HOME, respecting an environment variable if one is set
 : ${R_HOME=$(R RHOME)}

diff --git a/inst/NEWS.Rd b/inst/NEWS.Rd
@@ -3,9 +3,17 @@
 \newcommand{\ghpr}{\href{https://github.com/RcppCore/RcppArmadillo/pull/#1}{##1}}
 \newcommand{\ghit}{\href{https://github.com/RcppCore/RcppArmadillo/issues/#1}{##1}}
 
-\section{Changes in RcppArmadillo version 15.1.99-1 (2025-10-16) (GitHub Only)}{
+\section{Changes in RcppArmadillo version 15.2.0-0 (2025-10-20) (GitHub Only)}{
   \itemize{
-    \item Upgraded to Armadillo release 15.2.0 (RC1 right now)
+    \item Upgraded to Armadillo release 15.2.0 (Medium Roast Deluxe)
+    \itemize{
+      \item Added \code{rande()} for generating matrices with elements from
+      exponential distributions
+      \item \code{shift()} has been deprecated in favour of
+      \code{circshift()}, for consistency with Matlab/Octave
+      \item Reworked detection of aliasing, leading to more efficient
+      compiled code
+    }
   }
 }
 

diff --git a/inst/include/current/armadillo_bits/Col_meat.hpp b/inst/include/current/armadillo_bits/Col_meat.hpp
@@ -1264,6 +1264,13 @@ Col<eT>::end_row(const uword row_num) const
 
 
 
+
+
+
+//
+
+
+
 template<typename eT>
 template<uword fixed_n_elem>
 arma_inline
@@ -1859,6 +1866,10 @@ Col<eT>::fixed<fixed_n_elem>::ones()
 
 
 
+//
+
+
+
 template<typename eT>
 inline
 Col<eT>::Col(const arma_fixed_indicator&, const uword in_n_elem, const eT* in_mem)

diff --git a/inst/include/current/armadillo_bits/Cube_meat.hpp b/inst/include/current/armadillo_bits/Cube_meat.hpp
@@ -3148,7 +3148,7 @@ Cube<eT>::Cube(const GlueCube<T1, T2, glue_type>& X)
   {
   arma_debug_sigprint_this(this);
 
-  this->operator=(X);
+  (*this).operator=(X);
   }
 
 

diff --git a/inst/include/current/armadillo_bits/Mat_bones.hpp b/inst/include/current/armadillo_bits/Mat_bones.hpp
@@ -120,7 +120,7 @@ class Mat : public Base< eT, Mat<eT> >
   template<typename T1, typename T2> inline explicit Mat(const Base<pod_type,T1>& A, const Base<pod_type,T2>& B, const arma_vec_indicator&, const uhword in_vec_state);
   template<typename T1, typename T2> inline explicit Mat(const Base<pod_type,T1>& A, const Base<pod_type,T2>& B);
 
-  inline explicit    Mat(const subview<eT>& X, const bool use_colmem);  // only to be used by the quasi_unwrap class
+  inline explicit    Mat(const subview<eT>& X, const bool reuse_mem);  // only to be used by quasi_unwrap and partial_unwrap
 
   inline             Mat(const subview<eT>& X, const arma_vec_indicator&, const uhword in_vec_state);
   inline             Mat(const subview<eT>& X);

diff --git a/inst/include/current/armadillo_bits/Mat_meat.hpp b/inst/include/current/armadillo_bits/Mat_meat.hpp
@@ -2021,18 +2021,18 @@ Mat<eT>::Mat(const Base<typename Mat<eT>::pod_type,T1>& A, const Base<typename M
 
 template<typename eT>
 inline
-Mat<eT>::Mat(const subview<eT>& X, const bool use_colmem)
+Mat<eT>::Mat(const subview<eT>& X, const bool reuse_mem)
   : n_rows(X.n_rows)
   , n_cols(X.n_cols)
   , n_elem(X.n_elem)
   , n_alloc(0)
   , vec_state(0)
-  , mem_state(use_colmem ? 3 : 0)
-  , mem      (use_colmem ? X.colptr(0) : nullptr)
+  , mem_state(reuse_mem ? 3           : 0      )
+  , mem      (reuse_mem ? X.colptr(0) : nullptr)
   {
   arma_debug_sigprint_this(this);
 
-  if(use_colmem)
+  if(reuse_mem)
     {
     arma_debug_print("Mat::Mat(): using existing memory in a submatrix");
     }

diff --git a/inst/include/current/armadillo_bits/Row_bones.hpp b/inst/include/current/armadillo_bits/Row_bones.hpp
@@ -85,8 +85,6 @@ class Row : public Mat<eT>
   template<typename T1, typename T2>
   inline explicit Row(const Base<pod_type,T1>& A, const Base<pod_type,T2>& B);
 
-  inline explicit Row(const subview<eT>& X, const bool use_colmem);  // only to be used by the quasi_unwrap class
-
   template<typename T1> inline            Row(const BaseCube<eT,T1>& X);
   template<typename T1> inline Row& operator=(const BaseCube<eT,T1>& X);
 
@@ -171,6 +169,9 @@ class Row : public Mat<eT>
   inline const_row_iterator end_row  (const uword row_num) const;
 
 
+  inline explicit Row(const subview<eT>& X, const bool reuse_mem);  // only to be used by the partial_unwrap class
+
+
   template<uword fixed_n_elem> class fixed;
 
 

diff --git a/inst/include/current/armadillo_bits/Row_meat.hpp b/inst/include/current/armadillo_bits/Row_meat.hpp
@@ -610,16 +610,6 @@ Row<eT>::Row
 
 
 
-template<typename eT>
-inline
-Row<eT>::Row(const subview<eT>& X, const bool use_colmem)
-  : Mat<eT>(X, use_colmem)
-  {
-  arma_debug_sigprint();
-  }
-
-
-
 template<typename eT>
 template<typename T1>
 inline
@@ -1274,6 +1264,20 @@ Row<eT>::end_row(const uword row_num) const
 
 
 
+template<typename eT>
+inline
+Row<eT>::Row(const subview<eT>& X, const bool reuse_mem)
+  : Mat<eT>(X, reuse_mem)
+  {
+  arma_debug_sigprint_this(this);
+  }
+
+
+
+//
+
+
+
 template<typename eT>
 template<uword fixed_n_elem>
 arma_inline
@@ -1869,6 +1873,10 @@ Row<eT>::fixed<fixed_n_elem>::ones()
 
 
 
+//
+
+
+
 template<typename eT>
 inline
 Row<eT>::Row(const arma_fixed_indicator&, const uword in_n_elem, const eT* in_mem)

diff --git a/inst/include/current/armadillo_bits/arma_version.hpp b/inst/include/current/armadillo_bits/arma_version.hpp
@@ -22,9 +22,9 @@
 
 
 #define ARMA_VERSION_MAJOR 15
-#define ARMA_VERSION_MINOR 1
-#define ARMA_VERSION_PATCH 91
-#define ARMA_VERSION_NAME  "15.2-RC1"
+#define ARMA_VERSION_MINOR 2
+#define ARMA_VERSION_PATCH 0
+#define ARMA_VERSION_NAME  "Medium Roast Deluxe"
 
 
 

diff --git a/inst/include/current/armadillo_bits/field_meat.hpp b/inst/include/current/armadillo_bits/field_meat.hpp
@@ -94,7 +94,7 @@ field<oT>::field(const subview_field<oT>& X)
   {
   arma_debug_sigprint_this(this);
 
-  this->operator=(X);
+  (*this).operator=(X);
   }
 
 

diff --git a/inst/include/current/armadillo_bits/op_accu_bones.hpp b/inst/include/current/armadillo_bits/op_accu_bones.hpp
@@ -65,6 +65,9 @@ struct  op_accu_mat
 
   template<typename eT>
   static inline eT apply(const subview_col<eT>& X);
+
+  template<typename eT>
+  static inline eT apply(const subview_row<eT>& X);
   };
 
 

diff --git a/inst/include/current/armadillo_bits/op_accu_meat.hpp b/inst/include/current/armadillo_bits/op_accu_meat.hpp
@@ -121,20 +121,6 @@ op_accu_mat::apply(const T1& X)
     return arrayops::accumulate(U.M.memptr(), U.M.n_elem);
     }
 
-  if(is_subview_row<T1>::value)
-    {
-    typedef typename T1::elem_type eT;
-
-    const subview_row<eT>& sv = reinterpret_cast< const subview_row<eT>& >(X);
-
-    if(sv.m.n_rows == 1)
-      {
-      const eT* sv_mem = &(sv.m.at(sv.aux_col1));
-
-      return arrayops::accumulate(sv_mem, sv.n_elem);
-      }
-    }
-
   const Proxy<T1> P(X);
 
   return (Proxy<T1>::use_at) ? op_accu_mat::apply_proxy_at(P) : op_accu_mat::apply_proxy_linear(P);
@@ -616,19 +602,7 @@ op_accu_mat::apply(const subview<eT>& X)
   const uword X_n_rows = X.n_rows;
   const uword X_n_cols = X.n_cols;
 
-  if(X_n_rows == 1)
-    {
-    const Mat<eT>& m = X.m;
-
-    const uword col_offset = X.aux_col1;
-    const uword row_offset = X.aux_row1;
-
-    eT val = eT(0);
-
-    for(uword i=0; i < X_n_cols; ++i)  { val += m.at(row_offset, col_offset + i); }
-
-    return val;
-    }
+  if(X_n_rows == 1)  { return op_accu_mat::apply( static_cast< const subview_row<eT>& >(X) ); }
 
   if(X_n_cols == 1)  { return arrayops::accumulate( X.colptr(0), X_n_rows ); }
 
@@ -656,6 +630,39 @@ op_accu_mat::apply(const subview_col<eT>& X)
 
 
 
+template<typename eT>
+inline
+eT
+op_accu_mat::apply(const subview_row<eT>& X)
+  {
+  arma_debug_sigprint();  
+
+  const uword X_m_n_rows = X.m.n_rows;
+  const uword X_n_cols   = X.n_cols;
+
+  const eT* row_mem = &(X.m.at(X.aux_row1,X.aux_col1));
+
+  eT val1 = eT(0);
+  eT val2 = eT(0);
+
+  uword j;
+
+  for(j=1; j < X_n_cols; j+=2)
+    {
+    val1 += (*row_mem); row_mem += X_m_n_rows;
+    val2 += (*row_mem); row_mem += X_m_n_rows;
+    }
+
+  if((j-1) < X_n_cols)
+    {
+    val1 += (*row_mem);
+    }
+
+  return val1 + val2;
+  }
+
+
+
 //
 
 

diff --git a/inst/include/current/armadillo_bits/subview_bones.hpp b/inst/include/current/armadillo_bits/subview_bones.hpp
@@ -171,8 +171,8 @@ class subview : public Base< eT, subview<eT> >
   inline       subview<eT> rows(const uword in_row1, const uword in_row2);
   inline const subview<eT> rows(const uword in_row1, const uword in_row2) const;
 
-  inline       subview<eT> cols(const uword in_col1, const uword in_col2);
-  inline const subview<eT> cols(const uword in_col1, const uword in_col2) const;
+  inline       subview<eT> cols(const uword in_col1, const uword in_col2);        // deliberately not returning subview_cols
+  inline const subview<eT> cols(const uword in_col1, const uword in_col2) const;  // deliberately not returning subview_cols
 
   inline       subview<eT> submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2);
   inline const subview<eT> submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2) const;
-Original file line number
+Diff line change
@@ Expand Up / @@ -3148,7 +3148,7 @@ Cube<eT>::Cube(const GlueCube<T1, T2, glue_type>& X) @@
       {
       arma_debug_sigprint_this(this);
-      this->operator=(X);
+      (*this).operator=(X);
       }
@@ Expand Down @@