%%
%% This is file `l3tl.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% l3tl.dtx  (with options: `package,trace')
%% 
%% 
%% EXPERIMENTAL CODE
%% 
%% Do not distribute this file without also distributing the
%% source files specified above.
%% 
%% Do not distribute a modified version of this file.
%% 
%% 
%% File: l3tl.dtx Copyright (C) 1990-2010 LaTeX3 project
%%
%% It may be distributed and/or modified under the conditions of the
%% LaTeX Project Public License (LPPL), either version 1.3c of this
%% license or (at your option) any later version.  The latest version
%% of this license is in the file
%%
%%    http://www.latex-project.org/lppl.txt
%%
%% This file is part of the ``expl3 bundle'' (The Work in LPPL)
%% and all files in that bundle must be distributed together.
%%
%% The released version of this bundle is available from CTAN.
%%
%% -----------------------------------------------------------------------
%%
%% The development version of the bundle can be found at
%%
%%    http://www.latex-project.org/svnroot/experimental/trunk/
%%
%% for those people who are interested.
%%
%%%%%%%%%%%
%% NOTE: %%
%%%%%%%%%%%
%%
%%   Snapshots taken from the repository represent work in progress and may
%%   not work or may contain conflicting material!  We therefore ask
%%   people _not_ to put them into distributions, archives, etc. without
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%% -----------------------------------------------------------------------
\RequirePackage{l3names}
\GetIdInfo$Id: l3tl.dtx 2103 2010-12-18 07:40:03Z joseph $
          {L3 Experimental Token Lists}
\ProvidesExplPackage
  {\filename}{\filedate}{\fileversion}{\filedescription}
\package_check_loaded_expl:
\cs_new_protected:Npn \tl_new:Nn #1#2{
  \chk_if_free_cs:N #1
  \cs_gset_nopar:Npn #1{#2}
}
\cs_generate_variant:Nn \tl_new:Nn {cn}
\cs_new_protected:Npn \tl_new:Nx #1#2{
  \chk_if_free_cs:N #1
  \cs_gset_nopar:Npx #1{#2}
}
\cs_new_protected_nopar:Npn \tl_new:N #1{\tl_new:Nn #1{}}
\cs_new_protected_nopar:Npn \tl_new:c #1{\tl_new:cn {#1}{}}
\cs_new_protected:Npn \tl_const:Nn #1#2 {
  \tl_new:N   #1
  \tl_gset:Nn #1 {#2}
}
\cs_new_nopar:Npn \tl_use:N #1 {
  \if_meaning:w #1 \tex_relax:D
     \msg_kernel_bug:x {Token~list~variable~ `\token_to_str:N #1'~
                       has~ an~ erroneous~ structure!}
  \else:
    \exp_after:wN #1
  \fi:
}
\cs_generate_variant:Nn \tl_use:N {c}
\cs_new_nopar:Npn \tl_show:N #1 { \cs_show:N #1 }
\cs_generate_variant:Nn \tl_show:N {c}
\cs_set_eq:NN \tl_show:n \etex_showtokens:D
\cs_new_protected:Npn \tl_set:Nn #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:n {#2} }
}
\cs_new_protected:Npn \tl_set:Nx #1#2 {
  \cs_set_nopar:Npx #1 {#2}
}
\cs_new_protected:Npn \tl_gset:Nn #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:n {#2} }
}
\cs_new_protected:Npn \tl_gset:Nx #1#2 {
  \cs_gset_nopar:Npx #1 {#2}
}
\cs_generate_variant:Nn \tl_set:Nn  { NV }
\cs_generate_variant:Nn \tl_set:Nn  { Nv }
\cs_generate_variant:Nn \tl_set:Nn  { No }
\cs_generate_variant:Nn \tl_set:Nn  { Nf }
\cs_generate_variant:Nn \tl_set:Nn  { cV }
\cs_generate_variant:Nn \tl_set:Nn  { c }
\cs_generate_variant:Nn \tl_set:Nn  { cv }
\cs_generate_variant:Nn \tl_set:Nn  { co }
\cs_generate_variant:Nn \tl_set:Nx  { c }
\cs_generate_variant:Nn \tl_gset:Nn { NV }
\cs_generate_variant:Nn \tl_gset:Nn { Nv }
\cs_generate_variant:Nn \tl_gset:Nn { No }
\cs_generate_variant:Nn \tl_gset:Nn { Nf }
\cs_generate_variant:Nn \tl_gset:Nn { c }
\cs_generate_variant:Nn \tl_gset:Nn { cV }
\cs_generate_variant:Nn \tl_gset:Nn { cv }
\cs_generate_variant:Nn \tl_gset:Nx { c }
\cs_new_eq:NN \tl_set_eq:NN  \cs_set_eq:NN
\cs_new_eq:NN \tl_gset_eq:NN \cs_gset_eq:NN
\cs_generate_variant:Nn \tl_set_eq:NN {Nc,c,cc}
\cs_generate_variant:Nn \tl_gset_eq:NN {Nc,c,cc}
\cs_new_protected_nopar:Npn \tl_clear:N #1{\tl_set_eq:NN #1\c_empty_tl}
\cs_generate_variant:Nn \tl_clear:N {c}
\cs_new_protected_nopar:Npn \tl_gclear:N #1{\tl_gset_eq:NN #1\c_empty_tl}
\cs_generate_variant:Nn \tl_gclear:N {c}
\cs_new_eq:NN \tl_clear_new:N \tl_clear:N
\cs_generate_variant:Nn \tl_clear_new:N {c}
\cs_new_eq:NN \tl_gclear_new:N \tl_gclear:N
\cs_generate_variant:Nn \tl_gclear_new:N {c}
\cs_new_protected:Npn \tl_put_right:Nn #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:n {#2} }
}
\cs_new_protected:Npn \tl_put_right:NV #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:V #2 }
}
\cs_new_protected:Npn \tl_put_right:Nv #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:v {#2} }
}
\cs_new_protected:Npn \tl_put_right:Nx #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o #1 #2 }
}
\cs_new_protected:Npn \tl_put_right:No #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:o {#2} }
}
\cs_new_protected:Npn \tl_gput_right:Nn #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:n {#2} }
}
\cs_new_protected:Npn \tl_gput_right:NV #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:V #2 }
}
\cs_new_protected:Npn \tl_gput_right:Nv #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:v {#2} }
}
\cs_new_protected:Npn \tl_gput_right:No #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:o {#2} }
}
\cs_new_protected:Npn \tl_gput_right:Nx #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o #1 #2 }
}
\cs_generate_variant:Nn \tl_put_right:Nn  { c }
\cs_generate_variant:Nn \tl_put_right:NV  { c }
\cs_generate_variant:Nn \tl_put_right:Nv  { c }
\cs_generate_variant:Nn \tl_put_right:Nx  { c }
\cs_generate_variant:Nn \tl_gput_right:Nn { c }
\cs_generate_variant:Nn \tl_gput_right:NV { c }
\cs_generate_variant:Nn \tl_gput_right:Nv { c }
\cs_generate_variant:Nn \tl_gput_right:No { c }
\cs_generate_variant:Nn \tl_gput_right:Nx { c }
\cs_new_protected:Npn \tl_put_left:Nn #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:n {#2} \exp_not:o #1  }
}
\cs_new_protected:Npn \tl_put_left:NV #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:V #2 \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_put_left:Nv #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:v {#2} \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_put_left:Nx #1#2 {
  \cs_set_nopar:Npx #1 { #2 \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_put_left:No #1#2 {
  \cs_set_nopar:Npx #1 { \exp_not:o {#2} \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_gput_left:Nn #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:n {#2} \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_gput_left:NV #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:V #2 \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_gput_left:Nv #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:v {#2} \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_gput_left:No #1#2 {
  \cs_gset_nopar:Npx #1 { \exp_not:o {#2} \exp_not:o #1 }
}
\cs_new_protected:Npn \tl_gput_left:Nx #1#2 {
  \cs_gset_nopar:Npx #1 { #2 \exp_not:o #1 }
}
\cs_generate_variant:Nn \tl_put_left:Nn  { c }
\cs_generate_variant:Nn \tl_put_left:NV  { c }
\cs_generate_variant:Nn \tl_put_left:Nv  { c }
\cs_generate_variant:Nn \tl_put_left:Nx  { c }
\cs_generate_variant:Nn \tl_gput_left:Nn { c }
\cs_generate_variant:Nn \tl_gput_left:NV { c }
\cs_generate_variant:Nn \tl_gput_left:Nv { c }
\cs_generate_variant:Nn \tl_gput_left:Nx { c }
\cs_new_protected_nopar:Npn \tl_gset:Nc {
 \pref_global:D
  \tl_set:Nc}
\cs_new_protected_nopar:Npn \tl_set:Nc #1#2{\tl_set:No #1{\cs:w#2\cs_end:}}
\tl_new:N \c_job_name_tl
\tl_set:Nx \c_job_name_tl { \tex_jobname:D }
\tl_const:Nn \c_empty_tl { }
\tl_const:Nn \c_space_tl { ~ }
\tl_new:N \g_tmpa_tl
\tl_new:N \g_tmpb_tl
\tl_new:N \l_kernel_testa_tl
\tl_new:N \l_kernel_testb_tl
\tl_new:N \l_tmpa_tl
\tl_new:N \l_tmpb_tl
\tl_new:N \l_kernel_tmpa_tl
\tl_new:N \l_kernel_tmpb_tl
\prg_set_conditional:Npnn \tl_if_empty:N #1 {p,TF,T,F} {
  \if_meaning:w #1 \c_empty_tl
    \prg_return_true: \else: \prg_return_false: \fi:
}
\cs_generate_variant:Nn \tl_if_empty_p:N {c}
\cs_generate_variant:Nn \tl_if_empty:NTF {c}
\cs_generate_variant:Nn \tl_if_empty:NT  {c}
\cs_generate_variant:Nn \tl_if_empty:NF  {c}
\prg_new_conditional:Npnn \tl_if_eq:NN #1#2 {p,TF,T,F} {
  \if_meaning:w #1 #2 \prg_return_true: \else: \prg_return_false: \fi:
}
\cs_generate_variant:Nn \tl_if_eq_p:NN {Nc,c,cc}
\cs_generate_variant:Nn \tl_if_eq:NNTF {Nc,c,cc}
\cs_generate_variant:Nn \tl_if_eq:NNT  {Nc,c,cc}
\cs_generate_variant:Nn \tl_if_eq:NNF  {Nc,c,cc}
\prg_new_protected_conditional:Npnn \tl_if_eq:nn #1#2 { T , F ,  TF } {
  \group_begin:
    \tl_set:Nn \l_tl_tmpa_tl {#1}
    \tl_set:Nn \l_tl_tmpb_tl {#2}
    \tex_ifx:D \l_tl_tmpa_tl \l_tl_tmpb_tl
      \group_end:
      \prg_return_true:
    \tex_else:D
      \group_end:
      \prg_return_false:
    \tex_fi:D
}
\tl_new:N \l_tl_tmpa_tl
\tl_new:N \l_tl_tmpb_tl
\prg_new_conditional:Npnn \tl_if_empty:n #1 {p,TF,T,F} {
  \exp_after:wN \if_meaning:w \exp_after:wN \q_nil \tl_to_str:n {#1} \q_nil
    \prg_return_true: \else: \prg_return_false: \fi:
}
\cs_generate_variant:Nn \tl_if_empty_p:n {V}
\cs_generate_variant:Nn \tl_if_empty:nTF {V}
\cs_generate_variant:Nn \tl_if_empty:nT  {V}
\cs_generate_variant:Nn \tl_if_empty:nF  {V}
\cs_generate_variant:Nn \tl_if_empty_p:n {o}
\cs_generate_variant:Nn \tl_if_empty:nTF {o}
\cs_generate_variant:Nn \tl_if_empty:nT  {o}
\cs_generate_variant:Nn \tl_if_empty:nF  {o}
\prg_new_conditional:Npnn \tl_if_blank:n #1 {p,TF,T,F} {
  \exp_after:wN \tl_if_blank_p_aux:w \tl_to_str:n {#1} aa..\q_stop
}
\cs_new:Npn \tl_if_blank_p_aux:w #1#2 a #3#4 \q_stop {
  \if_meaning:w #3 #4 \prg_return_true: \else: \prg_return_false: \fi:
}
\cs_generate_variant:Nn \tl_if_blank_p:n {V}
\cs_generate_variant:Nn \tl_if_blank:nTF {V}
\cs_generate_variant:Nn \tl_if_blank:nT  {V}
\cs_generate_variant:Nn \tl_if_blank:nF  {V}
\cs_generate_variant:Nn \tl_if_blank_p:n {o}
\cs_generate_variant:Nn \tl_if_blank:nTF {o}
\cs_generate_variant:Nn \tl_if_blank:nT  {o}
\cs_generate_variant:Nn \tl_if_blank:nF  {o}
\prg_new_conditional:Nnn \tl_if_single:n {p,TF,T,F} {
  \tl_if_empty:nTF {#1}
    {\prg_return_false:}
    {
      \tl_if_blank:nTF {#1}
        {\prg_return_true:}
        {
          \_tl_if_single_aux:w #1 \q_stop
        }
    }
}
\prg_new_conditional:Nnn \tl_if_single:N {p,TF,T,F} {
  \tl_if_empty:NTF #1
    {\prg_return_false:}
    {
      \exp_after:wN \tl_if_blank:nTF #1
        {\prg_return_true:}
        {
          \exp_after:wN \_tl_if_single_aux:w #1 \q_stop
        }
    }
}
\cs_new:Npn \_tl_if_single_aux:w #1#2 \q_stop {
  \tl_if_empty:nTF {#2} \prg_return_true: \prg_return_false:
}
\cs_new_eq:NN \tl_to_lowercase:n \tex_lowercase:D
\cs_new_eq:NN \tl_to_uppercase:n \tex_uppercase:D
\cs_new_eq:NN \tl_to_str:n \etex_detokenize:D
\cs_new_nopar:Npn \tl_to_str:N {\exp_after:wN\tl_to_str_aux:w
  \token_to_meaning:N}
\cs_new_nopar:Npn \tl_to_str_aux:w #1>{}
\cs_generate_variant:Nn \tl_to_str:N {c}
\cs_new:Npn \tl_map_function:nN #1#2{
  \tl_map_function_aux:Nn #2 #1 \q_recursion_tail \q_recursion_stop
}
\cs_new_nopar:Npn \tl_map_function:NN #1#2{
  \exp_after:wN \tl_map_function_aux:Nn
  \exp_after:wN #2 #1 \q_recursion_tail \q_recursion_stop
}
\cs_new:Npn \tl_map_function_aux:Nn #1#2{
  \quark_if_recursion_tail_stop:n{#2}
  #1{#2} \tl_map_function_aux:Nn  #1
}
\cs_generate_variant:Nn \tl_map_function:NN {cN}
\cs_new_protected:Npn \tl_map_inline:nn #1#2{
  \int_gincr:N \g_tl_inline_level_int
  \cs_gset:cpn {tl_map_inline_ \int_use:N \g_tl_inline_level_int :n}
  ##1{#2}
  \exp_args:Nc \tl_map_function_aux:Nn
  {tl_map_inline_ \int_use:N \g_tl_inline_level_int :n}
  #1 \q_recursion_tail\q_recursion_stop
  \int_gdecr:N \g_tl_inline_level_int
}
\cs_new_protected:Npn \tl_map_inline:Nn #1#2{
  \int_gincr:N \g_tl_inline_level_int
  \cs_gset:cpn {tl_map_inline_ \int_use:N \g_tl_inline_level_int :n}
  ##1{#2}
  \exp_last_unbraced:NcV \tl_map_function_aux:Nn
  {tl_map_inline_ \int_use:N \g_tl_inline_level_int :n}
  #1 \q_recursion_tail\q_recursion_stop
  \int_gdecr:N \g_tl_inline_level_int
}
\cs_generate_variant:Nn \tl_map_inline:Nn {c}
\cs_new_protected:Npn \tl_map_variable:nNn #1#2#3{
  \tl_map_variable_aux:Nnn #2 {#3} #1 \q_recursion_tail \q_recursion_stop
}
\cs_new_protected_nopar:Npn \tl_map_variable:NNn {\exp_args:No \tl_map_variable:nNn}
\cs_generate_variant:Nn \tl_map_variable:NNn {c}
\cs_new_protected:Npn \tl_map_variable_aux:Nnn #1#2#3{
  \tl_set:Nn #1{#3}
  \quark_if_recursion_tail_stop:N #1
  #2 \tl_map_variable_aux:Nnn #1{#2}
}
\cs_new_eq:NN \tl_map_break: \use_none_delimit_by_q_recursion_stop:w
\cs_new:Npn \tl_reverse:n #1{
  \tl_reverse_aux:nN {} #1 \q_recursion_tail\q_recursion_stop
}
\cs_new:Npn \tl_reverse_aux:nN #1#2{
  \quark_if_recursion_tail_stop_do:nn {#2}{ #1 }
  \tl_reverse_aux:nN {#2#1}
}
\cs_generate_variant:Nn \tl_reverse:n {V,o}
\cs_new_protected_nopar:Npn \tl_reverse:N #1 {
  \tl_set:Nf #1 { \tl_reverse:o { #1 \exp_stop_f: } }
}
\cs_new:Npn \tl_elt_count:n #1{
  \int_eval:n {
    0 \tl_map_function:nN {#1} \tl_elt_count_aux:n
  }
}
\cs_generate_variant:Nn \tl_elt_count:n {V,o}
\cs_new_nopar:Npn \tl_elt_count:N #1{
  \int_eval:n {
    0 \tl_map_function:NN #1 \tl_elt_count_aux:n
  }
}
\cs_new:Npn \tl_elt_count_aux:n #1 { + 1 }
\cs_new_protected:Npn \tl_set_rescan:Nnn  { \tl_set_rescan_aux:NNnn \tl_set:Nn  }
\cs_new_protected:Npn \tl_gset_rescan:Nnn { \tl_set_rescan_aux:NNnn \tl_gset:Nn }
\cs_generate_variant:Nn \tl_set_rescan:Nnn { Nno }
\cs_generate_variant:Nn \tl_gset_rescan:Nnn { Nno }
\group_begin:
  \tex_lccode:D `\A = `\@ \scan_stop:
  \tex_lccode:D `\B = `\@ \scan_stop:
  \tex_catcode:D `\A = 8 \scan_stop:
  \tex_catcode:D `\B = 3 \scan_stop:
\tl_to_lowercase:n {
  \group_end:
  \tl_const:Nn \c_two_ats_with_two_catcodes_tl { A B }
}
\cs_new_protected:Npn \tl_set_rescan_aux:NNnn #1#2#3#4 {
  \group_begin:
    \toks_set:NV \etex_everyeof:D \c_two_ats_with_two_catcodes_tl
    \tex_endlinechar:D = \c_minus_one
    #3
    \exp_after:wN \tl_rescan_aux:w \etex_scantokens:D {#4}
    \exp_args:NNNV
  \group_end:
  #1 #2 \l_tmpa_tl
}
\exp_after:wN \cs_set:Npn
\exp_after:wN \tl_rescan_aux:w
\exp_after:wN #
\exp_after:wN 1 \c_two_ats_with_two_catcodes_tl {
  \tl_set:Nn \l_tmpa_tl {#1}
}
\cs_new_protected:Npn \tl_set_rescan:Nnx #1#2#3 {
  \group_begin:
    \etex_everyeof:D { \exp_not:N }
    \tex_endlinechar:D = \c_minus_one
    #2
    \tl_set:Nx \l_kernel_tmpa_tl { \etex_scantokens:D {#3} }
    \exp_args:NNNV
  \group_end:
  \tl_set:Nn #1 \l_kernel_tmpa_tl
}
\cs_new_protected:Npn \tl_gset_rescan:Nnx #1#2#3 {
  \group_begin:
    \etex_everyeof:D { \exp_not:N }
    \tex_endlinechar:D = \c_minus_one
    #2
    \tl_gset:Nx #1 { \etex_scantokens:D {#3} }
  \group_end:
}
\cs_new_protected:Npn \tl_rescan:nn #1#2 {
  \group_begin:
    \toks_set:NV \etex_everyeof:D \c_two_ats_with_two_catcodes_tl
    \tex_endlinechar:D = \c_minus_one
    #1
    \exp_after:wN \tl_rescan_aux:w \etex_scantokens:D {#2}
  \exp_args:NV \group_end:
  \l_tmpa_tl
}
\prg_new_protected_conditional:Npnn \tl_if_in:Nn #1#2 {TF,T,F} {
  \cs_set:Npn \tl_tmp:w ##1 #2 ##2 \q_stop {
    \quark_if_no_value:nTF {##2} {\prg_return_false:} {\prg_return_true:}
  }
  \exp_after:wN \tl_tmp:w #1 #2 \q_no_value \q_stop
}
\cs_generate_variant:Nn \tl_if_in:NnTF {c}
\cs_generate_variant:Nn \tl_if_in:NnT  {c}
\cs_generate_variant:Nn \tl_if_in:NnF  {c}
\prg_new_protected_conditional:Npnn \tl_if_in:nn #1#2 {TF,T,F} {
  \cs_set:Npn \tl_tmp:w ##1 #2 ##2 \q_stop {
    \quark_if_no_value:nTF {##2} {\prg_return_false:} {\prg_return_true:}
  }
  \tl_tmp:w #1 #2 \q_no_value \q_stop
}
\cs_generate_variant:Nn \tl_if_in:nnTF {V}
\cs_generate_variant:Nn \tl_if_in:nnT  {V}
\cs_generate_variant:Nn \tl_if_in:nnF  {V}
\cs_generate_variant:Nn \tl_if_in:nnTF {o}
\cs_generate_variant:Nn \tl_if_in:nnT  {o}
\cs_generate_variant:Nn \tl_if_in:nnF  {o}
\tl_new:N \_l_tl_replace_tl
\cs_new_protected_nopar:Npn \tl_replace_in:Nnn {
  \_tl_replace_in_aux:NNnn \tl_set_eq:NN
}
\cs_new_protected:Npn \_tl_replace_in_aux:NNnn #1#2#3#4 {
  \cs_set:Npn \_tl_tmp:w ##1 #3 ##2 \q_stop
    {
      \quark_if_no_value:nF {##2}
        {
          \tl_set:No \_l_tl_replace_tl { ##1 #4 }
          \cs_set:Npn \_tl_tmp:w ####1 #3 \q_no_value {
            \tl_put_right:No \_l_tl_replace_tl {####1}
          }
          \_tl_tmp:w \prg_do_nothing: ##2
          #1 #2 \_l_tl_replace_tl
        }
    }
  \use:n
    {
      \exp_after:wN \_tl_tmp:w \exp_after:wN
        \prg_do_nothing:
    }
  #2 #3 \q_no_value \q_stop
}
\cs_new_protected_nopar:Npn \tl_greplace_in:Nnn {
  \_tl_replace_in_aux:NNnn \tl_gset_eq:NN
}
\cs_generate_variant:Nn \tl_replace_in:Nnn  { c }
\cs_generate_variant:Nn \tl_greplace_in:Nnn { c }
\cs_new_protected_nopar:Npn \tl_replace_all_in:Nnn {
  \_tl_replace_all_in_aux:NNnn \tl_set_eq:NN
}
\cs_new_protected_nopar:Npn \tl_greplace_all_in:Nnn {
  \_tl_replace_all_in_aux:NNnn \tl_gset_eq:NN
}
\cs_new_protected:Npn \_tl_replace_all_in_aux:NNnn #1#2#3#4 {
  \tl_clear:N \_l_tl_replace_tl
  \cs_set:Npn \_tl_tmp:w ##1 #3 ##2 \q_stop
    {
      \quark_if_no_value:nTF {##2}
        { \tl_put_right:No \_l_tl_replace_tl {##1} }
        {
          \tl_put_right:No \_l_tl_replace_tl { ##1 #4 }
          \_tl_tmp:w \prg_do_nothing: ##2 \q_stop
        }
    }
  \use:n
    {
      \exp_after:wN \_tl_tmp:w \exp_after:wN
        \prg_do_nothing:
    }
  #2 #3 \q_no_value \q_stop
  #1 #2 \_l_tl_replace_tl
}
\cs_generate_variant:Nn \tl_replace_all_in:Nnn  { c }
\cs_generate_variant:Nn \tl_greplace_all_in:Nnn { c }
\cs_new_protected:Npn \tl_remove_in:Nn  #1#2{\tl_replace_in:Nnn #1{#2}{}}
\cs_new_protected:Npn \tl_gremove_in:Nn #1#2{\tl_greplace_in:Nnn #1{#2}{}}
\cs_generate_variant:Nn \tl_remove_in:Nn {cn}
\cs_generate_variant:Nn \tl_gremove_in:Nn {cn}
\cs_new_protected:Npn \tl_remove_all_in:Nn #1#2{
  \tl_replace_all_in:Nnn #1{#2}{}
}
\cs_new_protected:Npn \tl_gremove_all_in:Nn #1#2{
  \tl_greplace_all_in:Nnn #1{#2}{}
}
\cs_generate_variant:Nn \tl_remove_all_in:Nn {cn}
\cs_generate_variant:Nn \tl_gremove_all_in:Nn {cn}
\cs_new:Npn \tl_head:n #1{\tl_head:w #1\q_stop}
\cs_new_eq:NN \tl_head_i:n \tl_head:n
\cs_new:Npn \tl_tail:n #1{\tl_tail:w #1\q_stop}
\cs_generate_variant:Nn \tl_tail:n {f}
\cs_new:Npn \tl_head_iii:n #1{\tl_head_iii:w #1\q_stop}
\cs_generate_variant:Nn \tl_head_iii:n {f}
\cs_new:Npn \tl_head:w #1#2\q_stop{#1}
\cs_new_eq:NN \tl_head_i:w \tl_head:w
\cs_new:Npn \tl_tail:w #1#2\q_stop{#2}
\cs_new:Npn \tl_head_iii:w #1#2#3#4\q_stop{#1#2#3}
\cs_generate_variant:Nn \tl_head:n { V }
\cs_generate_variant:Nn \tl_head:n { v }
\cs_generate_variant:Nn \tl_tail:n { V }
\cs_generate_variant:Nn \tl_tail:n { v }
\prg_new_conditional:Npnn \tl_if_head_eq_meaning:nN #1#2 {p,TF,T,F} {
  \exp_after:wN \if_meaning:w \tl_head:w #1 \q_stop #2
    \prg_return_true: \else: \prg_return_false: \fi:
}
\prg_new_conditional:Npnn \tl_if_head_eq_charcode:nN #1#2 {p,TF,T,F} {
  \exp_after:wN \if:w \exp_after:wN \exp_not:N
      \tl_head:w #1 \q_stop \exp_not:N #2
    \prg_return_true: \else: \prg_return_false: \fi:
}
%% \cs_new:Npn \tl_if_head_eq_charcode_p:fN #1#2{
%%    \exp_after:wN\if_charcode:w \tl_head:w #1\q_stop\exp_not:N#2
%%     \c_true_bool
%%   \else:
%%     \c_false_bool
%%   \fi:
%% }
%% \def_long_test_function_new:npn {tl_if_head_eq_charcode:fN}#1#2{
%%   \if_predicate:w \tl_if_head_eq_charcode_p:fN {#1}#2}
\cs_generate_variant:Nn \tl_if_head_eq_charcode_p:nN {f}
\cs_generate_variant:Nn \tl_if_head_eq_charcode:nNTF {f}
\cs_generate_variant:Nn \tl_if_head_eq_charcode:nNT  {f}
\cs_generate_variant:Nn \tl_if_head_eq_charcode:nNF  {f}
\prg_new_conditional:Npnn \tl_if_head_eq_catcode:nN #1#2 {p,TF,T,F} {
  \exp_after:wN \if_catcode:w \exp_after:wN \exp_not:N
      \tl_head:w #1 \q_stop \exp_not:N #2
    \prg_return_true: \else: \prg_return_false: \fi:
}
\tex_ifodd:D \@l@expl@check@declarations@bool \scan_stop:
  \cs_set_protected:Npn \_tl_check_exists:N #1
    {
      \cs_if_exist:NF #1
        {
          \msg_kernel_error:nnx { check } { non-declared-variable }
            { \token_to_str:N #1 }
        }
    }
  \cs_set_protected:Npn \tl_set:Nn #1#2
    {
      \_tl_check_exists:N #1
      \cs_set_nopar:Npx #1 { \exp_not:n {#2} }
    }
  \cs_set_protected:Npn \tl_set:Nx #1#2
    {
      \_tl_check_exists:N #1
      \cs_set_nopar:Npx #1 {#2}
    }
  \cs_set_protected:Npn \tl_gset:Nn #1#2
    {
      \_tl_check_exists:N #1
      \cs_gset_nopar:Npx #1 { \exp_not:n {#2} }
    }
  \cs_set_protected:Npn \tl_gset:Nx #1#2
    {
      \_tl_check_exists:N #1
      \cs_gset_nopar:Npx #1 {#2}
    }
  \cs_set_protected:Npn \tl_set_eq:NN #1#2
    {
      \_tl_check_exists:N #1
      \_tl_check_exists:N #2
      \cs_set_eq:NN #1 #2
    }
  \cs_set_protected:Npn \tl_gset_eq:NN #1#2
    {
      \_tl_check_exists:N #1
      \_tl_check_exists:N #2
      \cs_gset_eq:NN #1 #2
    }
  \cs_set_protected:Npn \tl_put_right:Nn #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:n {#2} }
  }
  \cs_set_protected:Npn \tl_put_right:NV #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:V #2 }
  }
  \cs_set_protected:Npn \tl_put_right:Nv #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:v {#2} }
  }
  \cs_set_protected:Npn \tl_put_right:No #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o #1 \exp_not:o {#2} }
  }
  \cs_set_protected:Npn \tl_put_right:Nx #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o #1 #2 }
  }
  \cs_set_protected:Npn \tl_gput_right:Nn #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:n {#2} }
  }
  \cs_set_protected:Npn \tl_gput_right:NV #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:V #2 }
  }
  \cs_set_protected:Npn \tl_gput_right:Nv #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:o #1 \exp_not:v {#2} }
  }
  \cs_set_protected:Npn \tl_gput_right:Nx #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:o #1 #2 }
  }
  \cs_set_protected:Npn \tl_put_left:Nn #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:n {#2} \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_put_left:NV #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:V #2 \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_put_left:Nv #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:v {#2} \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_put_left:No #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { \exp_not:o {#2} \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_put_left:Nx #1#2 {
    \_tl_check_exists:N #1
    \cs_set_nopar:Npx #1 { #2 \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_gput_left:Nn #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:n {#2} \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_gput_left:NV #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:V #2 \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_gput_left:Nv #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { \exp_not:v {#2} \exp_not:o #1 }
  }
  \cs_set_protected:Npn \tl_gput_left:Nx #1#2 {
    \_tl_check_exists:N #1
    \cs_gset_nopar:Npx #1 { #2 \exp_not:o #1 }
  }
\tex_fi:D
%% 
%%
%% End of file `l3tl.sty'.