nicematrix (8feb20)

git-svn-id: svn://tug.org/texlive/trunk@53721 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 127 insertions, 103 deletions

diff --git a/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx b/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
index bbbc805d70e..2752f0dd6fc 100644
--- a/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
+++ b/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
@@ -15,8 +15,8 @@
 %
 % \fi
 % \iffalse
-\def\myfileversion{3.10}
-\def\myfiledate{2020/01/22}
+\def\myfileversion{3.11}
+\def\myfiledate{2020/02/07}
 %
 %
 %<*batchfile>
@@ -1267,8 +1267,8 @@ c & c & b & a & e
 % two arguments. The first argument is the size of the block with the syntax
 % $i$\verb|-|$j$ where $i$ is the number of rows of the block and $j$ its number
 % of columns. The second argument is the content of the block (composed in math
-% mode).
-%
+% mode). A Tikz node corresponding to the merged cells is created with the name
+% ``\textsl{name}-$i$-$j$'' where \textsl{name} is the name given to the array.
 %
 %
 % \medskip
@@ -2248,6 +2248,31 @@ c & c & b & a & e
 %
 % |\ExplSyntaxOff|
 % \end{scope}
+%
+% \vspace{1cm}
+% We recall that, for a rectangle of merged cells (with the command |\Block|), a
+% Tikz node is created for the set of merged cells with the name $i$|-|$j$ where
+% $i$ and $j$ are the number of the row and the number of the column of the
+% upper left  cell (where the command |\Block| has been issued).
+%
+% \medskip
+% \begin{BVerbatim}[baseline=c,boxwidth=11.6cm]
+% $\begin{pNiceMatrix}%
+%   [margin,
+%    code-after = { \tikz \node [~emphase#highlight = (1-1)@] {} ; } ]
+% \Block{3-3}<\Large>{A} & & & 0 \\
+% & \hspace*{1cm} & & \Vdots \\
+% & & & 0 \\
+% 0 & \Cdots& 0 & 0
+% \end{pNiceMatrix}$
+% \end{BVerbatim}
+% $\begin{pNiceMatrix}[margin,
+%    code-after = { \tikz \node [highlight = (1-1)] {} ; } ]
+% \Block{3-3}<\Large>{A} & & & 0 \\
+% & \hspace*{1cm} & & \Vdots \\
+% & & & 0 \\
+% 0 & \Cdots& 0 & 0
+% \end{pNiceMatrix}$
 % 
 % \vspace{1cm}
 % Considerer now the following matrix which we have named |example|.
@@ -2432,7 +2457,7 @@ c & c & b & a & e
 % key |first-col|.
 % \begin{Verbatim}
 % \begin{bNiceArray}{CC>{\strut}CCC}[name=A,first-col]
-%     & a_{11} & \Cdots &  &  & a_{nn} \\
+%     & a_{11} & \Cdots &  &  & a_{1n} \\
 %     & \Vdots &       &  &  & \Vdots \\
 % L_i & a_{i1} & \Cdots & a_{ik} & \Cdots & a_{in} \\
 %     & \Vdots &       &  &  & \Vdots \\
@@ -2477,7 +2502,7 @@ c & c & b & a & e
 % b_{n1} & \Cdots & b_{nj} & \Cdots & b_{nn} 
 % \end{bNiceArray} \\ \\
 % \begin{bNiceArray}{CC>{\strut}CCC}[name=A,first-col]
-%     & a_{11} & \Cdots &        &        & a_{nn} \\
+%     & a_{11} & \Cdots &        &        & a_{1n} \\
 %     & \Vdots &        &        &        & \Vdots \\
 % L_i & a_{i1} & \Cdots & a_{ik} & \Cdots & a_{in} \\
 %     & \Vdots &        &        &        & \Vdots \\
@@ -2548,7 +2573,7 @@ c & c & b & a & e
   {nicematrix}
   {\myfiledate}
   {\myfileversion}
-  {Several features to improve the typesetting of mathematical matrices with TikZ}
+  {Mathematical matrices with TikZ}
 %    \end{macrocode}
 % 
 % \bigskip
@@ -3429,8 +3454,8 @@ c & c & b & a & e
 % |\l_@@_code_for_first_row_tl| and \emph{al} don't apply in the corners of the
 % matrix.
 %    \begin{macrocode}
-    \int_compare:nNnTF \c@iRow = \c_zero_int 
-      { \int_compare:nNnT \c@jCol > \c_zero_int \l_@@_code_for_first_row_tl }
+    \int_compare:nNnTF \c@iRow = 0 
+      { \int_compare:nNnT \c@jCol > 0 \l_@@_code_for_first_row_tl }
       {
         \int_compare:nNnT \c@iRow = \l_@@_last_row_int
           \l_@@_code_for_last_row_tl 
@@ -3447,8 +3472,8 @@ c & c & b & a & e
   {
     \int_gincr:N \c@iRow 
     \dim_gset_eq:NN \g_@@_dp_ante_last_row_dim \g_@@_dp_last_row_dim 
-    \dim_gzero:N \g_@@_dp_last_row_dim 
-    \dim_gzero:N \g_@@_ht_last_row_dim 
+    \dim_gset:Nn \g_@@_dp_last_row_dim { \box_dp:N \@arstrutbox }
+    \dim_gset:Nn \g_@@_ht_last_row_dim { \box_ht:N \@arstrutbox }
   }
 %    \end{macrocode}
 % 
@@ -3460,7 +3485,7 @@ c & c & b & a & e
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_actualization_for_first_and_last_row:
   {
-    \int_compare:nNnT \c@iRow = \c_zero_int
+    \int_compare:nNnT \c@iRow = 0
       { 
         \dim_gset:Nn \g_@@_dp_row_zero_dim
           { \dim_max:nn \g_@@_dp_row_zero_dim { \box_dp:N \l_tmpa_box } }
@@ -3549,11 +3574,11 @@ c & c & b & a & e
       {
         > {
             \hbox_set:Nw \l_tmpa_box
-            \_@@_Cell:
+            \@@_Cell:
           }
         c
         < {
-            \_@@_end_Cell:
+            \@@_end_Cell:
             \hbox_set_end:
             #2
             \tikz [ remember~picture ]
@@ -3774,7 +3799,6 @@ c & c & b & a & e
         \dim_gzero_new:N \g_@@_ht_row_one_dim
         \dim_gset:Nn \g_@@_ht_row_one_dim { \box_ht:N \@arstrutbox }
         \dim_gzero_new:N \g_@@_dp_ante_last_row_dim
-        \dim_gset:Nn \g_@@_dp_ante_last_row_dim { \box_dp:N \@arstrutbox }
         \dim_gzero_new:N \g_@@_ht_last_row_dim
         \dim_gset:Nn \g_@@_ht_last_row_dim { \box_ht:N \@arstrutbox }
         \dim_gzero_new:N \g_@@_dp_last_row_dim
@@ -4095,7 +4119,7 @@ c & c & b & a & e
 % We construct the preamble of the array in |\l_tmpa_tl|.
 %    \begin{macrocode}
     \tl_set:Nn \l_tmpa_tl { #4 }
-    \int_compare:nNnTF \l_@@_first_col_int = \c_zero_int
+    \int_compare:nNnTF \l_@@_first_col_int = 0
       { \tl_put_left:NV \l_tmpa_tl \c_@@_preamble_first_col_tl }
       {
         \bool_if:NT \l_@@_NiceArray_bool
@@ -4142,7 +4166,7 @@ c & c & b & a & e
 % Now, the box containing the array is constructed (in |\l_@@_the_array_box|).
 % However, we have some computations to do before inserting that box in the TeX
 % flow (mainly because the exterior columns are in overlapping positions).
-% 
+%
 % \bigskip
 %    \begin{macrocode}
     \int_compare:nNnT \l_@@_last_row_int > { -2 }
@@ -4155,42 +4179,17 @@ c & c & b & a & e
                 \int_gset_eq:NN \l_@@_last_row_int \c@iRow
               }
           } 
-      }
-%    \end{macrocode}
-%
-% Now, we compute |\l_tmpa_dim| which is the vertical dimension of the ``first
-% row'' above the array (when the key |first-row| is used).
-%    \begin{macrocode}
-    \int_compare:nNnTF \l_@@_first_row_int = \c_zero_int
-      { 
-        \dim_set:Nn \l_tmpa_dim 
-          { \g_@@_dp_row_zero_dim + \lineskip + \g_@@_ht_row_zero_dim }
-      }
-      { \dim_zero:N \l_tmpa_dim }
-%    \end{macrocode}
-% We compute |\l_tmpb_dim| which is the vertical dimension of the ``last row''
-% below the array (when the key |last-row| is used). A value of $-2$ for
-% |\l_@@_last_row_int| means that there is no ``last row''.\footnote{A value of
-% $-1$ for |\l_@@_last_row_int| means that there is a ``last row'' but the
-% number of that row is unknown (the user have not set the value with the option
-% |last row|).} 
-%    \begin{macrocode}
-    \int_compare:nNnTF \l_@@_last_row_int > { -2 }
-      {
-        \dim_set:Nn \l_tmpb_dim
-          { \g_@@_ht_last_row_dim + \lineskip + \g_@@_dp_last_row_dim }
-      }
-      { \dim_zero:N \l_tmpb_dim }
+      } 
 %    \end{macrocode}
 % 
 % \bigskip
-% Now, we begin the real construction in the output flow of TeX. First, we take
+% \textbf{Now, we begin the real construction in the output flow of TeX}. First, we take
 % into account a potential ``first column'' (we remind that this ``first
 % column'' has been constructed in an overlapping position and that we have
 % computed its width in |\g_@@_width_first_col_dim|: see
 % p.~\pageref{overlap-left}). 
 %    \begin{macrocode}
-    \int_compare:nNnT \l_@@_first_col_int = \c_zero_int
+    \int_compare:nNnT \l_@@_first_col_int = 0
       { 
         \skip_horizontal:n \arraycolsep
         \skip_horizontal:n \g_@@_width_first_col_dim 
@@ -4204,13 +4203,12 @@ c & c & b & a & e
 %    \begin{macrocode}
     \bool_if:NTF \l_@@_NiceArray_bool
       { 
-        \int_compare:nNnT \l_@@_first_row_int = \c_zero_int
+        \int_compare:nNnTF \l_@@_first_row_int = 0
           { 
-            \str_if_eq:VnTF \l_@@_pos_env_str { t }
-              {
-                \box_move_up:nn 
-                  { \l_tmpa_dim - \g_@@_ht_row_zero_dim + \g_@@_ht_row_one_dim }
-              }
+            \str_if_eq:VnT \l_@@_pos_env_str { t }
+              { 
+                \box_move_up:nn { \g_@@_dp_row_zero_dim + \g_@@_ht_row_one_dim }
+              } 
           }
           {
             \int_compare:nNnT \l_@@_last_row_int > 0
@@ -4218,10 +4216,7 @@ c & c & b & a & e
                 \str_if_eq:VnT \l_@@_pos_env_str { b }
                   {
                     \box_move_down:nn
-                      { 
-                        \l_tmpb_dim 
-                        - \g_@@_dp_last_row_dim + \g_@@_dp_ante_last_row_dim 
-                      } 
+                      { \g_@@_ht_last_row_dim + \g_@@_dp_ante_last_row_dim }
                   }
               }
           }
@@ -4229,9 +4224,34 @@ c & c & b & a & e
       } 
 %    \end{macrocode}
 %
-% Now, in the case of an environment |{pNiceArray}|, |{bNiceArray}|, etc.
+% Now, in the case of an environment |{pNiceArray}|, |{bNiceArray}|, etc. We
+% compute |\l_tmpa_dim| which is the total height of the ``first row'' above the
+% array (when the key |first-row| is used).
 %    \begin{macrocode}
       {
+        \int_compare:nNnTF \l_@@_first_row_int = 0
+          { 
+            \dim_set:Nn \l_tmpa_dim 
+              { \g_@@_dp_row_zero_dim + \g_@@_ht_row_zero_dim } 
+          } 
+          { \dim_zero:N \l_tmpa_dim }
+%    \end{macrocode}
+% We compute |\l_tmpb_dim| which is the total height of the ``last row''
+% below the array (when the key |last-row| is used). A value of $-2$ for
+% |\l_@@_last_row_int| means that there is no ``last row''.\footnote{A value of
+% $-1$ for |\l_@@_last_row_int| means that there is a ``last row'' but the
+% number of that row is unknown (the user have not set the value with the option
+% |last row|).} 
+%    \begin{macrocode}
+        \int_compare:nNnTF \l_@@_last_row_int > { -2 }
+          {
+            \dim_set:Nn \l_tmpb_dim
+              { \g_@@_ht_last_row_dim + \g_@@_dp_last_row_dim }
+          }
+          { \dim_zero:N \l_tmpb_dim }
+%    \end{macrocode}
+% 
+%    \begin{macrocode}        
         \hbox_set:Nn \l_tmpa_box
           {
             \c_math_toggle_token
@@ -4239,8 +4259,8 @@ c & c & b & a & e
             \vcenter 
               { 
 %    \end{macrocode}
-% We take into account the ``first row'' (we have previously computed its size
-% in |\l_tmpa_dim|).
+% We take into account the ``first row'' (we have previously computed its total
+% height in |\l_tmpa_dim|).
 %    \begin{macrocode}
                 \skip_vertical:n { - \l_tmpa_dim }
                 \hbox:n 
@@ -4250,8 +4270,8 @@ c & c & b & a & e
                     \skip_horizontal:n { - \arraycolsep }
                   }
 %    \end{macrocode}
-% We take into account the ``last row'' (we have previously computed its size
-% in |\l_tmpb_dim|).
+% We take into account the ``last row'' (we have previously computed its total
+% height in |\l_tmpb_dim|).
 %    \begin{macrocode}
                 \skip_vertical:n { - \l_tmpb_dim }
               }
@@ -4263,9 +4283,9 @@ c & c & b & a & e
         \box_use_drop:N \l_tmpa_box
       } 
 %    \end{macrocode}
-% We take into account a potential ``last column'' (this ``last
-% column'' has been constructed in an overlapping position and we have computed
-% its width in |\g_@@_width_last_col_dim|: see p.~\pageref{overlap-right}).
+% We take into account a potential ``last column'' (this ``last column'' has
+% been constructed in an overlapping position and we have computed its width in
+% |\g_@@_width_last_col_dim|: see p.~\pageref{overlap-right}).
 %    \begin{macrocode}           
     \bool_if:NT \g_@@_last_col_found_bool 
       { 
@@ -4489,7 +4509,7 @@ c & c & b & a & e
 %    \begin{macrocode}
         \bool_if:nT
           {
-            \int_compare_p:nNn \c@iRow > \c_zero_int 
+            \int_compare_p:nNn \c@iRow > 0 
             && 
             (
               \int_compare_p:nNn \l_@@_last_row_int < 0
@@ -4586,7 +4606,7 @@ c & c & b & a & e
 %    \begin{macrocode}
         \bool_if:nT
           {
-            \int_compare_p:nNn \c@iRow > \c_zero_int 
+            \int_compare_p:nNn \c@iRow > 0 
             && 
             (
               \int_compare_p:nNn \l_@@_last_row_int < 0
@@ -4879,7 +4899,7 @@ c & c & b & a & e
 %    \begin{macrocode}
 \cs_new_protected:Nn \@@_after_array:
   { 
-    \int_compare:nNnTF \c@iRow > \c_zero_int
+    \int_compare:nNnTF \c@iRow > 0
       \@@_after_array_i:
       { 
         \@@_error:n { Zero~row } 
@@ -5375,7 +5395,7 @@ c & c & b & a & e
     \cs_if_free:cT { @@ _ dotted _ #1 - #2 }
       {
         \bool_set_false:N \l_@@_impossible_line_bool
-        \@@_find_extremities_of_line:nnnn { #1 } { #2 } \c_zero_int \c_one_int
+        \@@_find_extremities_of_line:nnnn { #1 } { #2 } 0 \c_one_int
         \bool_if:NF \l_@@_impossible_line_bool \@@_actually_draw_Ldots:
       }
   }
@@ -5445,7 +5465,7 @@ c & c & b & a & e
     \cs_if_free:cT { @@ _ dotted _ #1 - #2 }
       {
         \bool_set_false:N \l_@@_impossible_line_bool
-        \@@_find_extremities_of_line:nnnn { #1 } { #2 } \c_zero_int \c_one_int 
+        \@@_find_extremities_of_line:nnnn { #1 } { #2 } 0 \c_one_int 
         \bool_if:NF \l_@@_impossible_line_bool
           {
             \@@_retrieve_coords:xx 
@@ -5501,7 +5521,7 @@ c & c & b & a & e
     \cs_if_free:cT { @@ _ dotted _ #1 - #2 }
       {
         \bool_set_false:N \l_@@_impossible_line_bool
-        \@@_find_extremities_of_line:nnnn { #1 } { #2 } \c_one_int \c_zero_int
+        \@@_find_extremities_of_line:nnnn { #1 } { #2 } \c_one_int 0
         \bool_if:NF \l_@@_impossible_line_bool
           {
             \@@_retrieve_coords:xx 
@@ -6191,7 +6211,7 @@ c & c & b & a & e
                     &&
                 ! \l_@@_exterior_arraycolsep_bool
                     &&
-                \int_compare_p:nNn \l_@@_first_col_int > \c_zero_int
+                \int_compare_p:nNn \l_@@_first_col_int > 0
               }
               { \skip_horizontal:n { - \arraycolsep } } 
             \hbox_to_wd:nn 
@@ -6213,7 +6233,7 @@ c & c & b & a & e
 % We should allow the letter ``|:|'' in the first position of the preamble
 % but that would need a special programmation.
 %    \begin{macrocode}
-    \int_compare:nNnTF #1 = \c_zero_int
+    \int_compare:nNnTF #1 = 0
       { \@@_error:n { Use~of~:~in~first~position } }
       {   
         \bool_if:NF \c_@@_draft_bool
@@ -6300,7 +6320,7 @@ c & c & b & a & e
 % with |\newcolumntype|:
 % \begin{Verbatim}[commandchars=\~\#\+]
 %    \newcolumntype { | }
-%      { ! { \int_compare:nNnF \c@iRow = \c_zero_int \vline } } 
+%      { ! { \int_compare:nNnF \c@iRow = 0 \vline } } 
 % \end{Verbatim}
 % 
 % However, this code fails if the user uses "\DefineShortVerb{\|}" of
@@ -6318,20 +6338,20 @@ c & c & b & a & e
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_vline:
   { 
-    \int_compare:nNnTF \l_@@_first_col_int = \c_zero_int 
+    \int_compare:nNnTF \l_@@_first_col_int = 0 
       { 
-        \int_compare:nNnTF \c@jCol = \c_zero_int
+        \int_compare:nNnTF \c@jCol = 0
           {
-            \int_compare:nNnTF \l_@@_first_row_int = \c_zero_int
+            \int_compare:nNnTF \l_@@_first_row_int = 0
               {     
-                \int_compare:nNnF \c@iRow = \c_zero_int 
+                \int_compare:nNnF \c@iRow = 0 
                   { 
                     \int_compare:nNnF \c@iRow = \l_@@_last_row_int
                     \@@_vline_i: 
                   }  
               }
               {
-                \int_compare:nNnF \c@iRow = \c_zero_int
+                \int_compare:nNnF \c@iRow = 0
                   { 
                     \int_compare:nNnF \c@iRow = \l_@@_last_row_int
                     \@@_vline_i: 
@@ -6339,7 +6359,7 @@ c & c & b & a & e
               }    
            }
            {     
-             \int_compare:nNnF \c@iRow = \c_zero_int 
+             \int_compare:nNnF \c@iRow = 0 
                { 
                  \int_compare:nNnF \c@iRow = \l_@@_last_row_int
                  \@@_vline_i: 
@@ -6347,7 +6367,7 @@ c & c & b & a & e
            }
       }
       { 
-        \int_compare:nNnTF \c@jCol = \c_zero_int
+        \int_compare:nNnTF \c@jCol = 0
           {
             \int_compare:nNnF \c@iRow = { -1 }
               { 
@@ -6356,7 +6376,7 @@ c & c & b & a & e
               } 
           }
           {     
-            \int_compare:nNnF \c@iRow = \c_zero_int 
+            \int_compare:nNnF \c@iRow = 0 
               { 
                 \int_compare:nNnF \c@iRow = \l_@@_last_row_int
                   \@@_vline_i: 
@@ -6396,7 +6416,7 @@ c & c & b & a & e
 %    \begin{macrocode}
 \cs_new:Npn \@@_OnlyMainNiceMatrix:n #1
   {
-    \int_compare:nNnF \c@iRow = \c_zero_int
+    \int_compare:nNnF \c@iRow = 0
       { \int_compare:nNnF \c@iRow = \l_@@_last_row_int { #1 } }
   }
 %    \end{macrocode}
@@ -7010,15 +7030,15 @@ c & c & b & a & e
     \@@_set_size:n #4 \q_stop
     \begin { NiceArrayWithDelims } { #1 } { #2 } 
       { * { \l_@@_nb_cols_int } { C } } [ #3 , #5 , #7 ] 
-    \int_compare:nNnT \l_@@_first_row_int = \c_zero_int
+    \int_compare:nNnT \l_@@_first_row_int = 0
       { 
-        \int_compare:nNnT \l_@@_first_col_int = \c_zero_int { & } 
+        \int_compare:nNnT \l_@@_first_col_int = 0 { & } 
         \prg_replicate:nn { \l_@@_nb_cols_int - 1 } { & } 
         \int_compare:nNnT \l_@@_last_col_int > { -1 } { & } \\ 
       }
     \prg_replicate:nn \l_@@_nb_rows_int
       { 
-        \int_compare:nNnT \l_@@_first_col_int = \c_zero_int { & }
+        \int_compare:nNnT \l_@@_first_col_int = 0 { & }
 %    \end{macrocode}
 % You put |{ }| before |#6| to avoid a hasty expansion of an eventual
 % |\arabic{iRow}| at the beginning of the row which would result in an incorrect
@@ -7030,7 +7050,7 @@ c & c & b & a & e
       }
     \int_compare:nNnT \l_@@_last_row_int > { -2 }
       { 
-        \int_compare:nNnT \l_@@_first_col_int = \c_zero_int { & }
+        \int_compare:nNnT \l_@@_first_col_int = 0 { & }
         \prg_replicate:nn { \l_@@_nb_cols_int - 1 } { & } 
         \int_compare:nNnT \l_@@_last_col_int > { -1 } { & } \\  
       }
@@ -7372,7 +7392,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \pNiceArray
   }
   { \endpNiceArray }
@@ -7383,7 +7403,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \bNiceArray
   }
   { \endbNiceArray }
@@ -7394,7 +7414,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \BNiceArray
   }
   { \endBNiceArray }
@@ -7405,7 +7425,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \vNiceArray
   }
   { \endvNiceArray }
@@ -7416,7 +7436,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \VNiceArray
   }
   { \endVNiceArray }
@@ -7427,8 +7447,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \pNiceArray
   }
   { \endpNiceArray }
@@ -7439,8 +7459,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \bNiceArray
   }
   { \endbNiceArray }
@@ -7451,8 +7471,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \BNiceArray
   }
   { \endBNiceArray }
@@ -7463,8 +7483,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \bool_set_true:N \l_@@_last_col_bool
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \vNiceArray
   }
   { \endvNiceArray }
@@ -7475,8 +7495,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \VNiceArray
   }
   { \endVNiceArray }
@@ -7487,7 +7507,7 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~option~'last-col' }
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
+    \int_zero:N \l_@@_last_col_int 
     \NiceArrayWithDelims
   }
   { \endNiceArrayWithDelims }
@@ -7498,8 +7518,8 @@ c & c & b & a & e
   {
     \@@_error:nn { Obsolete~environment } 
       { the~options~'last-col'~and~'first-row' } 
-    \int_set:Nn \l_@@_last_col_int \c_zero_dim
-    \int_set:Nn \l_@@_first_row_int \c_zero_int
+    \int_zero:N \l_@@_last_col_int 
+    \int_zero:N \l_@@_first_row_int 
     \NiceArrayWithDelims
   }
   { \endNiceArrayWithDelims }
@@ -7738,6 +7758,10 @@ c & c & b & a & e
 % New option |light-syntax| (and |end-of-row|).
 %
 % New option |dotted-lines-margin| for fine tuning of the dotted lines.
+%
+% \subsection*{Changes between versions 3.10 and 3.11}
+% 
+% Correction of a bug linked to |first-row| and |last-row|.
 % 
 % \PrintIndex
 %