texlive[60364] Master/texmf-dist: etl (29aug21)
commits+karl at tug.org
commits+karl at tug.org
Sun Aug 29 22:25:20 CEST 2021
Revision: 60364
http://tug.org/svn/texlive?view=revision&revision=60364
Author: karl
Date: 2021-08-29 22:25:20 +0200 (Sun, 29 Aug 2021)
Log Message:
-----------
etl (29aug21)
Modified Paths:
--------------
trunk/Master/texmf-dist/doc/latex/etl/README.md
trunk/Master/texmf-dist/doc/latex/etl/etl.pdf
trunk/Master/texmf-dist/source/latex/etl/etl.dtx
trunk/Master/texmf-dist/tex/latex/etl/etl.sty
Modified: trunk/Master/texmf-dist/doc/latex/etl/README.md
===================================================================
--- trunk/Master/texmf-dist/doc/latex/etl/README.md 2021-08-29 20:24:58 UTC (rev 60363)
+++ trunk/Master/texmf-dist/doc/latex/etl/README.md 2021-08-29 20:25:20 UTC (rev 60364)
@@ -1,7 +1,7 @@
-------------------------------------------------------------------------------
# etl -- expandable token list operations
-Version 2021-08-20 v0.1
+Version 2021-08-28 v0.2
Released under the LaTeX Project Public License v1.3c or later
See http://www.latex-project.org/lppl.txt
Modified: trunk/Master/texmf-dist/doc/latex/etl/etl.pdf
===================================================================
(Binary files differ)
Modified: trunk/Master/texmf-dist/source/latex/etl/etl.dtx
===================================================================
--- trunk/Master/texmf-dist/source/latex/etl/etl.dtx 2021-08-29 20:24:58 UTC (rev 60363)
+++ trunk/Master/texmf-dist/source/latex/etl/etl.dtx 2021-08-29 20:25:20 UTC (rev 60364)
@@ -110,9 +110,9 @@
% to unexpandable functions found inside the \pkg{l3tl} module of \pkg{expl3}.
% All user functions must not contain the tokens \cs{s__etl_stop}\footnote{At
% any nesting level of groups} or \cs{__etl_act_result:n}\footnote{Outside of
-% some local brace groups} in any argument (but there might be other forbidden
-% tokens, all of which are internals to this package, and usually shouldn't
-% somehow end up inside the input stream by accident).
+% some local brace groups} in any argument unless specified otherwise (there
+% might be other forbidden tokens, all of which are internals to this package,
+% and usually shouldn't somehow end up inside the input stream by accident).
%
% There is another limitation of this package: There are tokens which cannot
% expandably be differentiated from each other, those are active characters let
@@ -406,7 +406,7 @@
%
% \begin{function}[EXP]{\etl_replace_once:nnn}
% \begin{syntax}
-% \cs{etl_replace_once:nnn} \meta{token list} \meta{search text} \meta{replacement}
+% \cs{etl_replace_once:nnn} \Arg{token list} \Arg{search text} \Arg{replacement}
% \end{syntax}
% This function will replace the first occurrence of \meta{search text}
% inside of \meta{token list} that is not hidden inside a group with
@@ -422,7 +422,7 @@
%
% \begin{function}[EXP]{\etl_replace_all:nnn}
% \begin{syntax}
-% \cs{etl_replace_all:nnn} \meta{token list} \meta{search text} \meta{replacement}
+% \cs{etl_replace_all:nnn} \Arg{token list} \Arg{search text} \Arg{replacement}
% \end{syntax}
% This function will replace all occurrences of \meta{search text}
% inside of \meta{token list} that are not hidden inside a group with
@@ -438,7 +438,7 @@
%
% \begin{function}[EXP]{\etl_replace_all_deep:nnn}
% \begin{syntax}
-% \cs{etl_replace_all_deep:nnn} \meta{token list} \meta{search text} \meta{replacement}
+% \cs{etl_replace_all_deep:nnn} \Arg{token list} \Arg{search text} \Arg{replacement}
% \end{syntax}
% This function will replace all occurrences of \meta{search text}
% inside of \meta{token list} with \meta{replacement}.
@@ -452,14 +452,21 @@
% \end{function}
%
%
-% \subsection{New expandable fast tests}
+% \subsection{New expandable functions}
%
-% Functions generated with the means in this section are as fast as the
-% \pkg{l3tl} variants of them, but have at least one fixed argument.
+% Functions generated with the means in this section are roughly as fast as the
+% \pkg{l3tl} variants of them (there might be performance differences; in any
+% case they are faster than the generic functions above), but have at least one
+% fixed argument. They don't have the drawback of not being able to tell apart
+% an active character from a token with the same character code and different
+% category code if the active character was let to it and they don't normalise
+% braces to \texttt{\{\textsubscript{1}} and \texttt{\}\textsubscript{2}}.
%
+% \subsubsection{Conditionals}
+%
% \begin{function}{\etl_new_if_in:Nnn}
% \begin{syntax}
-% \cs{etl_new_if_in:Nnn} \meta{function} \meta{search text} \meta{conditions}
+% \cs{etl_new_if_in:Nnn} \meta{function} \Arg{search text} \Arg{conditions}
% \end{syntax}
% This will define a new \meta{function} which will act as a conditional and
% search for \meta{search text} inside of an |n|-type argument completely
@@ -479,6 +486,57 @@
% \my_if_a_in:nTF { a text } { true } { false }
% \my_if_a_in:nTF { text } { true } { false }
% \end{verbatim}
+%
+%
+% \subsubsection{Modifiers}
+%
+% \begin{function}{\etl_new_replace_once:Nn}
+% \begin{syntax}
+% \cs{etl_new_replace_once:Nn} \meta{function} \Arg{search text}
+% \end{syntax}
+% This defines a new \meta{function} that'll accept two arguments (the first
+% being a token list, the second a replacement). The generated \meta{function}
+% will replace the first occurrence of \meta{search text} inside the token
+% list with replacement. It'll ignore things hidden inside a group in the
+% token list. Neither the \meta{search text} nor the token list given to the
+% generated \meta{function} can contain \cs{s__etl_stop} (this would result in
+% undefined behaviour), the given replacement on the other hand might contain
+% that token. Additionally \meta{search text} can't contain tokens of category
+% group begin or group end (usually |{| and |}|) or macro parameters (usually
+% |#|).
+%
+% \begin{texnote}
+% The result of \meta{function} is returned within \cs{exp_not:n}, which
+% means that the token list does not expand further when appearing in an
+% \hbox{|x|- or} |e|-type argument expansion. The result will be returned
+% after exactly two steps of expansion.
+% \end{texnote}
+% \end{function}
+% So the following would yield |AcDC|:
+% \begin{verbatim}
+% \etl_new_replace_once:Nn \my_replace_C_once:nn { C }
+% \my_replace_C_once:nn { ACDC } { c }
+% \end{verbatim}
+%
+% \begin{function}{\etl_new_replace_all:Nn}
+% \begin{syntax}
+% \cs{etl_new_replace_all:Nn} \meta{function} \Arg{search text}
+% \end{syntax}
+% This behaves like \cs{etl_new_replace_once:Nn}, but the \meta{function} will
+% replace all occurrences of \meta{search text} instead of just the first.
+%
+% \begin{texnote}
+% The result of \meta{function} is returned within \cs{exp_not:n}, which
+% means that the token list does not expand further when appearing in an
+% \hbox{|x|- or} |e|-type argument expansion. The result will be returned
+% after exactly two steps of expansion.
+% \end{texnote}
+% \end{function}
+% So the following would yield |AcDc|:
+% \begin{verbatim}
+% \etl_new_replace_all:Nn \my_replace_C_all:nn { C }
+% \my_replace_C_all:nn { ACDC } { c }
+% \end{verbatim}
%
%
% \subsection{Bugs and Feature Requests}
@@ -506,7 +564,7 @@
% Tell who we are:
% \begin{macrocode}
\ProvidesExplPackage{etl}
- {2021-08-20} {0.1}
+ {2021-08-28} {0.2}
{expandable token list manipulation}
% \end{macrocode}
%
@@ -515,7 +573,7 @@
\cs_if_exist:NF \tex_expanded:D
{
\msg_new:nnn { etl } { expanded-missing }
- { The expanded primitive is required. }
+ { The~ expanded~ primitive~ is~ required. }
\msg_fatal:nn { etl } { expanded-missing }
}
% \end{macrocode}
@@ -666,12 +724,10 @@
\cs_new:Npn \etl_act:nnnnnnn #1#2#3#4#5#6#7
{
\@@_unexpanded:w \@@_expanded:w
- {
- {
- \@@_act:w #7 {\s_@@_stop} . \s_@@_stop {#5} {#1} {#2} {#3}
- \@@_act_result:n {#6} {#4}
- }
- }
+ {{
+ \@@_act:w #7 {\s_@@_stop} . \s_@@_stop {#5} {#1} {#2} {#3}
+ \@@_act_result:n {#6} {#4}
+ }}
}
% \end{macrocode}
% We also provide a version without the \cs{@@_unexpanded:w} around it for
@@ -1298,6 +1354,9 @@
% \end{macro}
% \end{macro}
%
+%
+% \subsection{Expandably modify token lists}
+%
% \begin{macro}[EXP]{\etl_token_replace_all:nNn}
% \begin{macro}[EXP]{\@@_token_replace:NnnN}
% Replaceing a single token (and in fact the same is true for all the
@@ -1647,23 +1706,46 @@
% \end{macrocode}
% \end{macro}
%
+%
+% \subsection{Defining new tests}
+%
% \begin{macro}{\etl_new_if_in:Nnn}
-% \begin{macro}{\@@_new_if_in:NNnn}
+% \begin{macro}{\@@_new_if_in:NnNnn, \@@_new_if_in:NNnn}
% These tests work essentially in the same way as \cs{tl_if_in:nnTF}, but
% instead they use a predefined internal macro so that no definition at use
-% time is necessary.
+% time is necessary. We use a small loop to get a unique auxiliary macro name
+% for the search text.
% \begin{macrocode}
-\exp_args:Nno \use:n { \cs_new_protected:Npn \etl_new_if_in:Nnn #1#2 }
+\exp_args:Nno \use:n { \cs_new_protected:Npn \etl_new_if_in:Nnn #1#2#3 }
{
- \exp_args:Nc \@@_new_if_in:NNnn
- { @@_user_function ~ \cs_to_str:N #1 ~ \tl_to_str:n {#2} :w }
+ \scan_stop:
+ \if_false: { \fi:
+ \exp_args:Nc \@@_new_if_in:NnNnn
+ { @@_user_function ~ if_in ~ \tl_to_str:n {#2} :w }
+ ?
#1 {#2}
+ {#3}
+ \if_false: } \fi:
}
+\cs_new_protected:Npn \@@_new_if_in:NnNnn #1#2#3#4
+ {
+ \cs_if_exist:NTF #1
+ {
+ \cs_set:Npn \@@_tmp:w ##1 #4 {}
+ \cs_if_eq:NNTF #1 \@@_tmp:w
+ { \@@_new_if_in:NNnn #1 #3 {#4} }
+ {
+ \exp_args:Nc \@@_new_if_in:NnNnn
+ { @@_user_function ~ if_in #2 ~ \tl_to_str:n {#4} :w }
+ { #2? }
+ #3 {#4}
+ }
+ }
+ { \@@_new_if_in:NNnn #1 #3 {#4} }
+ }
\cs_new_protected:Npn \@@_new_if_in:NNnn #1#2#3#4
{
- \scan_stop:
- \if_false: { \fi:
- \cs_new:Npn #1 ##1 #3 {}
+ \cs_gset:Npn #1 ##1 #3 {}
\prg_new_conditional:Npnn #2 ##1 {#4}
{
\if:w
@@ -1678,13 +1760,156 @@
\prg_return_false:
\fi:
}
- \if_false: } \fi:
}
% \end{macrocode}
% \end{macro}
% \end{macro}
%
+%
+% \subsection{Defining new modifiers}
+%
+% The implementation of |replace_once| and |replace_all| is modelled closely on
+% the implementation used in \pkg{l3tl}. The difference is that we use a hard
+% coded delimiter (\cs{s_@@_stop}) instead of searching for one that is always
+% legal (we can't do redefinitions, so can't change the delimiter later based on
+% the token list input).
+%
+%
+% \begin{macro}
+% {
+% \@@_new_replace_def:NNn,
+% \@@_new_replace_def_aux:NnNnN, \@@_new_replace_def_aux:Nn
+% }
+% We need another loop to guarantee unique names, if everything's alright we
+% go on and define the user function using |#1| of
+% \cs{@@_new_replace_def:NNn}. An empty search pattern is forbidden and should
+% throw an error.
% \begin{macrocode}
+\msg_new:nnn { etl } { empty-search-text }
+ { The~ search~ text~ of~ #1 must~ not~ be~ empty. }
+\cs_new_protected:Npn \@@_new_replace_def:NNn #1#2#3
+ {
+ \tl_if_empty:nTF {#3}
+ { \msg_error:nnn { etl } { empty-search-text } { #2 } }
+ {
+ \scan_stop:
+ \if_false: { \fi:
+ \exp_args:Nc \@@_new_replace_def_aux:NnNnN
+ { @@_user_function ~ replace ~ \tl_to_str:n {#3} ~ :Nnw }
+ ?
+ #2 {#3}
+ #1
+ \if_false: } \fi:
+ }
+ }
+\cs_new_protected:Npn \@@_new_replace_def_aux:NnNnN #1#2#3#4#5
+ {
+ \cs_if_exist:NTF #1
+ {
+ \@@_new_replace_def_aux:Nn \@@_tmp:w {#4}
+ \cs_if_eq:NNTF #1 \@@_tmp:w
+ { #5 #1#3 {#4} }
+ {
+ \exp_args:Nc \@@_new_replace_def_aux:NnNnN
+ { @@_user_function ~ replace #2 ~ \tl_to_str:n {#4} ~ :Nnw }
+ { #2? } #3 {#4} #5
+ }
+ }
+ {
+ \@@_new_replace_def_aux:Nn #1 {#4}
+ #5 #1#3 {#4}
+ }
+ }
+% \end{macrocode}
+% The auxiliary macro uses a loop for the replacement. This is also used for
+% the |once| variant. This saves internal functions if both an |all| and a
+% |once| function are generated for the same search text (though the |once|
+% variant could be coded easier and faster otherwise, but the performance hit
+% should be small).
+% \begin{macrocode}
+\cs_new_protected:Npn \@@_new_replace_def_aux:Nn #1#2
+ {
+ \cs_gset:Npn #1 ##1##2 ##3#2
+ {
+ \@@_new_replace_wrap:w ##3 \s_@@_stop \@@_unexpanded:w {##2}
+ ##1 #1 {##2} {}{}
+ }
+ }
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\@@_new_replace_wrap:w}
+% \begin{macro}{\@@_new_replace_once:w}
+% \begin{macro}{\@@_new_replace_done:w}
+% We need a few auxiliaries for the two replacement variants here. The first
+% just grabs the already processed part of the token list and protects it from
+% further expanding. The second breaks the loop for the |once| variant by
+% protecting the remainder of the token list from further expanding. The last
+% just gobbles the remainder of the loop by using an unbalanced brace trick.
+% \begin{macrocode}
+\cs_new:Npn \@@_new_replace_wrap:w #1\s_@@_stop
+ { \@@_unexpanded:w \exp_after:wN { \use_none:nn #1 } }
+\cs_new:Npn \@@_new_replace_once:w #1#2 #3\s_@@_stop
+ { \@@_unexpanded:w \exp_after:wN { \use_none:nn #3 } }
+\cs_new:Npn \@@_new_replace_done:w
+ { \exp_after:wN \use_none:n \exp_after:wN { \if_false: } \fi: }
+% \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+%
+% \begin{macro}{\etl_new_replace_once:Nn}
+% \begin{macro}{\@@_new_replace_once:NNn}
+% The |once| variant will use \cs{@@_new_replace_done_once:w} if the
+% replacement is successful (that will remove the remainder of the loop, and
+% protect both the replacement and the rest of the token list on which we work
+% from further expanding).
+% \begin{macrocode}
+\cs_new_protected:Npn \etl_new_replace_once:Nn
+ { \@@_new_replace_def:NNn \@@_new_replace_once:NNn }
+\cs_new_protected:Npn \@@_new_replace_once:NNn #1#2#3
+ {
+ \cs_new:Npn #2 ##1##2
+ {
+ \@@_unexpanded:w \@@_expanded:w
+ {{
+ \if_false: { \fi:
+ #1 \@@_new_replace_once:w {##2} {}{} ##1 \s_@@_stop
+ \@@_new_replace_done:w #3
+ }
+ }}
+ }
+ }
+% \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \begin{macro}{\etl_new_replace_all:Nn}
+% \begin{macro}{\@@_new_replace_all:NNn}
+% The |all| variant will directly protect the replacement from further
+% expanding and reiterate (due to the way the auxiliary is defined) until the
+% replacement isn't found anymore.
+% \begin{macrocode}
+\cs_new_protected:Npn \etl_new_replace_all:Nn
+ { \@@_new_replace_def:NNn \@@_new_replace_all:NNn }
+\cs_new_protected:Npn \@@_new_replace_all:NNn #1#2#3
+ {
+ \cs_new:Npn #2 ##1##2
+ {
+ \@@_unexpanded:w \@@_expanded:w
+ {{
+ \if_false: { \fi:
+ #1 #1 {##2} {}{} ##1 \s_@@_stop
+ \@@_new_replace_done:w #3
+ }
+ }}
+ }
+ }
+% \end{macrocode}
+% \end{macro}
+% \end{macro}
+%
+% \begin{macrocode}
%</pkg>
% \end{macrocode}
%
Modified: trunk/Master/texmf-dist/tex/latex/etl/etl.sty
===================================================================
--- trunk/Master/texmf-dist/tex/latex/etl/etl.sty 2021-08-29 20:24:58 UTC (rev 60363)
+++ trunk/Master/texmf-dist/tex/latex/etl/etl.sty 2021-08-29 20:25:20 UTC (rev 60364)
@@ -30,12 +30,12 @@
%% etl.sty
%%
\ProvidesExplPackage{etl}
- {2021-08-20} {0.1}
+ {2021-08-28} {0.2}
{expandable token list manipulation}
\cs_if_exist:NF \tex_expanded:D
{
\msg_new:nnn { etl } { expanded-missing }
- { The expanded primitive is required. }
+ { The~ expanded~ primitive~ is~ required. }
\msg_fatal:nn { etl } { expanded-missing }
}
\cs_new_eq:NN \__etl_expanded:w \tex_expanded:D
@@ -93,12 +93,10 @@
\cs_new:Npn \etl_act:nnnnnnn #1#2#3#4#5#6#7
{
\__etl_unexpanded:w \__etl_expanded:w
- {
- {
- \__etl_act:w #7 {\s__etl_stop} . \s__etl_stop {#5} {#1} {#2} {#3}
- \__etl_act_result:n {#6} {#4}
- }
- }
+ {{
+ \__etl_act:w #7 {\s__etl_stop} . \s__etl_stop {#5} {#1} {#2} {#3}
+ \__etl_act_result:n {#6} {#4}
+ }}
}
\cs_new:Npn \__etl_act:nnnnnnn #1#2#3#4#5#6#7
{
@@ -684,17 +682,36 @@
{ {#2} {#2} {} {#3} \s__etl_mark }
{#1}
}
-\exp_args:Nno \use:n { \cs_new_protected:Npn \etl_new_if_in:Nnn #1#2 }
+\exp_args:Nno \use:n { \cs_new_protected:Npn \etl_new_if_in:Nnn #1#2#3 }
{
- \exp_args:Nc \__etl_new_if_in:NNnn
- { __etl_user_function ~ \cs_to_str:N #1 ~ \tl_to_str:n {#2} :w }
+ \scan_stop:
+ \if_false: { \fi:
+ \exp_args:Nc \__etl_new_if_in:NnNnn
+ { __etl_user_function ~ if_in ~ \tl_to_str:n {#2} :w }
+ ?
#1 {#2}
+ {#3}
+ \if_false: } \fi:
}
+\cs_new_protected:Npn \__etl_new_if_in:NnNnn #1#2#3#4
+ {
+ \cs_if_exist:NTF #1
+ {
+ \cs_set:Npn \__etl_tmp:w ##1 #4 {}
+ \cs_if_eq:NNTF #1 \__etl_tmp:w
+ { \__etl_new_if_in:NNnn #1 #3 {#4} }
+ {
+ \exp_args:Nc \__etl_new_if_in:NnNnn
+ { __etl_user_function ~ if_in #2 ~ \tl_to_str:n {#4} :w }
+ { #2? }
+ #3 {#4}
+ }
+ }
+ { \__etl_new_if_in:NNnn #1 #3 {#4} }
+ }
\cs_new_protected:Npn \__etl_new_if_in:NNnn #1#2#3#4
{
- \scan_stop:
- \if_false: { \fi:
- \cs_new:Npn #1 ##1 #3 {}
+ \cs_gset:Npn #1 ##1 #3 {}
\prg_new_conditional:Npnn #2 ##1 {#4}
{
\if:w
@@ -709,8 +726,86 @@
\prg_return_false:
\fi:
}
- \if_false: } \fi:
}
+\msg_new:nnn { etl } { empty-search-text }
+ { The~ search~ text~ of~ #1 must~ not~ be~ empty. }
+\cs_new_protected:Npn \__etl_new_replace_def:NNn #1#2#3
+ {
+ \tl_if_empty:nTF {#3}
+ { \msg_error:nnn { etl } { empty-search-text } { #2 } }
+ {
+ \scan_stop:
+ \if_false: { \fi:
+ \exp_args:Nc \__etl_new_replace_def_aux:NnNnN
+ { __etl_user_function ~ replace ~ \tl_to_str:n {#3} ~ :Nnw }
+ ?
+ #2 {#3}
+ #1
+ \if_false: } \fi:
+ }
+ }
+\cs_new_protected:Npn \__etl_new_replace_def_aux:NnNnN #1#2#3#4#5
+ {
+ \cs_if_exist:NTF #1
+ {
+ \__etl_new_replace_def_aux:Nn \__etl_tmp:w {#4}
+ \cs_if_eq:NNTF #1 \__etl_tmp:w
+ { #5 #1#3 {#4} }
+ {
+ \exp_args:Nc \__etl_new_replace_def_aux:NnNnN
+ { __etl_user_function ~ replace #2 ~ \tl_to_str:n {#4} ~ :Nnw }
+ { #2? } #3 {#4} #5
+ }
+ }
+ {
+ \__etl_new_replace_def_aux:Nn #1 {#4}
+ #5 #1#3 {#4}
+ }
+ }
+\cs_new_protected:Npn \__etl_new_replace_def_aux:Nn #1#2
+ {
+ \cs_gset:Npn #1 ##1##2 ##3#2
+ {
+ \__etl_new_replace_wrap:w ##3 \s__etl_stop \__etl_unexpanded:w {##2}
+ ##1 #1 {##2} {}{}
+ }
+ }
+\cs_new:Npn \__etl_new_replace_wrap:w #1\s__etl_stop
+ { \__etl_unexpanded:w \exp_after:wN { \use_none:nn #1 } }
+\cs_new:Npn \__etl_new_replace_once:w #1#2 #3\s__etl_stop
+ { \__etl_unexpanded:w \exp_after:wN { \use_none:nn #3 } }
+\cs_new:Npn \__etl_new_replace_done:w
+ { \exp_after:wN \use_none:n \exp_after:wN { \if_false: } \fi: }
+\cs_new_protected:Npn \etl_new_replace_once:Nn
+ { \__etl_new_replace_def:NNn \__etl_new_replace_once:NNn }
+\cs_new_protected:Npn \__etl_new_replace_once:NNn #1#2#3
+ {
+ \cs_new:Npn #2 ##1##2
+ {
+ \__etl_unexpanded:w \__etl_expanded:w
+ {{
+ \if_false: { \fi:
+ #1 \__etl_new_replace_once:w {##2} {}{} ##1 \s__etl_stop
+ \__etl_new_replace_done:w #3
+ }
+ }}
+ }
+ }
+\cs_new_protected:Npn \etl_new_replace_all:Nn
+ { \__etl_new_replace_def:NNn \__etl_new_replace_all:NNn }
+\cs_new_protected:Npn \__etl_new_replace_all:NNn #1#2#3
+ {
+ \cs_new:Npn #2 ##1##2
+ {
+ \__etl_unexpanded:w \__etl_expanded:w
+ {{
+ \if_false: { \fi:
+ #1 #1 {##2} {}{} ##1 \s__etl_stop
+ \__etl_new_replace_done:w #3
+ }
+ }}
+ }
+ }
%%
%%
%% End of file `etl.sty'.
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