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authorKarl Berry <karl@freefriends.org>2013-07-29 22:37:58 +0000
committerKarl Berry <karl@freefriends.org>2013-07-29 22:37:58 +0000
commit81ad2a9f387b54bdad66ad8e98714b742d059445 (patch)
tree5be9236dae4a0f49c8c73302820eace9dd8b1ebc /Master/texmf-dist/tex/latex/gtl
parent17f1587d183c51b1a54c75db9b597a57f29207f0 (diff)
gtl (29jul13)
git-svn-id: svn://tug.org/texlive/trunk@31306 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/latex/gtl')
-rw-r--r--Master/texmf-dist/tex/latex/gtl/gtl.sty619
1 files changed, 619 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/latex/gtl/gtl.sty b/Master/texmf-dist/tex/latex/gtl/gtl.sty
new file mode 100644
index 00000000000..8bd342609b0
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/gtl/gtl.sty
@@ -0,0 +1,619 @@
+%%
+%% This is file `gtl.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% gtl.dtx (with options: `package')
+%%
+%% Do not distribute a modified version of this file.
+%%
+%% Communicate any suggestions for changing this package
+%% to Bruno Le Floch (blflatex@gmail.com).
+%%
+%% File: gtl.dtx Copyright (C) 2013 Bruno Le Floch
+%%
+%% 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
+%%
+%% -----------------------------------------------------------------------
+\RequirePackage{expl3}[2013/07/01]
+\ProvidesExplPackage
+ {gtl} {2013/07/28} {0.0a} {Manipulate unbalanced lists of tokens}
+\cs_generate_variant:Nn \use:nn { no }
+\cs_new:Npn \__gtl_exp_not_n:N #1 { \exp_not:n {#1} }
+\cs_new:Npn \__gtl_brace:nn #1#2 { { #1 #2 } }
+\cs_new:Npn \__gtl_brace_swap:nn #1#2 { { #2 #1 } }
+\cs_new_nopar:Npn \__gtl_strip_nil_mark:w
+ { \__gtl_strip_nil_mark_aux:w \prg_do_nothing: }
+\cs_new:Npn \__gtl_strip_nil_mark_aux:w #1 \q_nil \q_mark
+ { \exp_not:o {#1} }
+\__scan_new:N \s__gtl
+\cs_new_protected_nopar:Npn \gtl_set:Nn { \__gtl_set:NNn \tl_set:Nn }
+\cs_new_protected_nopar:Npn \gtl_gset:Nn { \__gtl_set:NNn \tl_gset:Nn }
+\cs_new_protected_nopar:Npn \gtl_const:Nn { \__gtl_set:NNn \tl_const:Nn }
+\cs_new_protected_nopar:Npn \gtl_set:Nx { \__gtl_set:NNn \tl_set:Nx }
+\cs_new_protected_nopar:Npn \gtl_gset:Nx { \__gtl_set:NNn \tl_gset:Nx }
+\cs_new_protected_nopar:Npn \gtl_const:Nx { \__gtl_set:NNn \tl_const:Nx }
+\cs_new_protected:Npn \__gtl_set:NNn #1#2#3
+ { #1 #2 { \s__gtl { } {#3} { } \s__stop } }
+\gtl_const:Nn \c_empty_gtl { }
+\tl_const:Nn \c_group_end_gtl { \s__gtl { { } } { } { } \s__stop }
+\tl_const:Nn \c_group_begin_gtl { \s__gtl { } { } { { } } \s__stop }
+\cs_new_protected:Npn \gtl_new:N #1
+ { \cs_new_eq:NN #1 \c_empty_gtl }
+\cs_new_eq:NN \gtl_set_eq:NN \tl_set_eq:NN
+\cs_new_eq:NN \gtl_gset_eq:NN \tl_gset_eq:NN
+\cs_new_protected:Npn \gtl_clear:N #1
+ { \gtl_set_eq:NN #1 \c_empty_gtl }
+\cs_new_protected:Npn \gtl_gclear:N #1
+ { \gtl_gset_eq:NN #1 \c_empty_gtl }
+\cs_new_protected:Npn \gtl_clear_new:N #1
+ { \gtl_if_exist:NTF #1 { \gtl_clear:N #1 } { \gtl_new:N #1 } }
+\cs_new_protected:Npn \gtl_gclear_new:N #1
+ { \gtl_if_exist:NTF #1 { \gtl_gclear:N #1 } { \gtl_new:N #1 } }
+\prg_new_eq_conditional:NNn \gtl_if_exist:N \tl_if_exist:N
+ { p , T , F , TF }
+\cs_new_protected:Npn \gtl_put_left:Nn #1#2
+ { \tl_set:Nx #1 { \exp_after:wN \__gtl_put_left:wn #1 {#2} } }
+\cs_new_protected:Npn \gtl_gput_left:Nn #1#2
+ { \tl_gset:Nx #1 { \exp_after:wN \__gtl_put_left:wn #1 {#2} } }
+\cs_new:Npn \__gtl_put_left:wn \s__gtl #1#2#3 \s__stop #4
+ {
+ \tl_if_empty:nTF {#1}
+ { \exp_not:n { \s__gtl { } { #4 #2 } {#3} \s__stop } }
+ {
+ \s__gtl
+ { \exp_not:o { \__gtl_brace:nn {#4} #1 } }
+ { \exp_not:n {#2} }
+ { \exp_not:n {#3} }
+ \s__stop
+ }
+ }
+\cs_new_protected:Npn \gtl_put_right:Nn #1#2
+ { \tl_set:Nx #1 { \exp_after:wN \__gtl_put_right:wn #1 {#2} } }
+\cs_new_protected:Npn \gtl_gput_right:Nn #1#2
+ { \tl_gset:Nx #1 { \exp_after:wN \__gtl_put_right:wn #1 {#2} } }
+\cs_new:Npn \__gtl_put_right:wn \s__gtl #1#2#3 \s__stop #4
+ {
+ \tl_if_empty:nTF {#3}
+ { \exp_not:n { \s__gtl {#1} { #2 #4 } { } \s__stop } }
+ {
+ \s__gtl
+ { \exp_not:n {#1} }
+ { \exp_not:n {#2} }
+ { \exp_not:o { \__gtl_brace_swap:nn {#4} #3 } }
+ \s__stop
+ }
+ }
+\cs_new_protected:Npn \gtl_concat:NNN #1#2#3
+ { \tl_set:Nx #1 { \exp_last_two_unbraced:Noo \__gtl_concat:ww #2 #3 } }
+\cs_new_protected:Npn \gtl_gconcat:NNN #1#2#3
+ { \tl_gset:Nx #1 { \exp_last_two_unbraced:Noo \__gtl_concat:ww #2 #3 } }
+\cs_new:Npn \__gtl_concat:ww \s__gtl #1#2#3 \s__stop \s__gtl #4#5#6 \s__stop
+ {
+ \tl_if_blank:nTF {#3}
+ {
+ \tl_if_blank:nTF {#4}
+ { \__gtl_concat_aux:nnnnnn }
+ { \__gtl_concat_auxi:nnnnnn }
+ }
+ {
+ \tl_if_blank:nTF {#4}
+ { \__gtl_concat_auxii:nnnnnn }
+ { \__gtl_concat_auxiv:nnnn }
+ }
+ {#1} {#2} {#3} {#4} {#5} {#6}
+ \s__stop
+ }
+\cs_new:Npn \__gtl_concat_aux:nnnnnn #1#2#3#4#5#6
+ { \exp_not:n { \s__gtl {#1} { #2 #5 } {#6} } }
+\cs_new:Npn \__gtl_concat_auxi:nnnnnn #1#2#3#4#5#6
+ {
+ \s__gtl
+ {
+ \exp_not:n {#1}
+ \exp_not:f
+ { \__gtl_concat_auxiii:w \__gtl_brace:nn {#2} #4 ~ \q_stop }
+ }
+ { \exp_not:n {#5} }
+ { \exp_not:n {#6} }
+ }
+\cs_new:Npn \__gtl_concat_auxii:nnnnnn #1#2#3#4#5#6
+ {
+ \s__gtl
+ { \exp_not:n {#1} }
+ { \exp_not:n {#2} }
+ {
+ \exp_not:n {#6}
+ \exp_not:f
+ { \__gtl_concat_auxiii:w \__gtl_brace_swap:nn {#5} #3 ~ \q_stop }
+ }
+ }
+\cs_new:Npn \__gtl_concat_auxiii:w #1 ~ #2 \q_stop {#1}
+\cs_new:Npn \__gtl_concat_auxiv:nnnn #1#2#3#4
+ {
+ \tl_if_single:nTF {#3}
+ { \__gtl_concat_auxv:wnwnn }
+ { \__gtl_concat_auxvi:nnwnwnn }
+ #3 ~ \q_mark #4 ~ \q_mark {#1} {#2}
+ }
+\cs_new:Npn \__gtl_concat_auxv:wnwnn
+ #1#2 \q_mark #3#4 \q_mark #5#6
+ {
+ \__gtl_concat:ww
+ \s__gtl {#5} { #6 { #1 #3 } } { } \s__stop
+ \s__gtl {#4}
+ }
+\cs_new:Npn \__gtl_concat_auxvi:nnwnwnn
+ #1#2#3 \q_mark #4#5 \q_mark #6#7
+ {
+ \__gtl_concat:ww
+ \s__gtl {#6} {#7} { { #2 { #1 #4 } } #3 } \s__stop
+ \s__gtl {#5}
+ }
+\cs_new:Npn \gtl_to_str:N #1 { \exp_after:wN \__gtl_to_str:w #1 }
+\cs_new:Npn \gtl_to_str:n #1 { \__gtl_to_str:w #1 }
+\cs_new:Npn \__gtl_to_str:w \s__gtl #1#2#3 \s__stop
+ { \__gtl_to_str_loopi:nnw { } #1 \q_nil \q_mark {#2} {#3} }
+\cs_new:Npx \__gtl_to_str_loopi:nnw #1#2
+ {
+ \exp_not:N \quark_if_nil:nTF {#2}
+ { \exp_not:N \__gtl_to_str_testi:nnw {#1} {#2} }
+ { \exp_not:N \__gtl_to_str_loopi:nnw { #1 #2 \iow_char:N \} } }
+ }
+\cs_new:Npx \__gtl_to_str_testi:nnw #1#2#3 \q_mark
+ {
+ \exp_not:N \tl_if_empty:nTF {#3}
+ { \exp_not:N \__gtl_to_str_endi:nnn {#1} }
+ {
+ \exp_not:N \__gtl_to_str_loopi:nnw
+ { #1 #2 \iow_char:N \} } #3 \exp_not:N \q_mark
+ }
+ }
+\cs_new:Npn \__gtl_to_str_endi:nnn #1#2#3
+ { \__gtl_to_str_loopii:nnw #3 { #1 #2 } \q_nil \q_stop }
+\cs_new:Npx \__gtl_to_str_loopii:nnw #1#2
+ {
+ \exp_not:N \quark_if_nil:nTF {#2}
+ { \exp_not:N \__gtl_to_str_testii:nnw {#1} {#2} }
+ { \exp_not:N \__gtl_to_str_loopii:nnw { #2 \iow_char:N \{ #1 } }
+ }
+\cs_new:Npx \__gtl_to_str_testii:nnw #1#2#3 \q_stop
+ {
+ \exp_not:N \tl_if_empty:nTF {#3}
+ { \exp_not:N \tl_to_str:n {#1} }
+ {
+ \exp_not:N \__gtl_to_str_loopii:nnw
+ { #2 \iow_char:N \{ #1 } #3 \exp_not:N \q_stop
+ }
+ }
+\cs_new_protected:Npn \gtl_show:N #1
+ { \exp_args:Nx \tl_show:n { \token_to_str:N #1 = \gtl_to_str:N #1 } }
+\prg_new_conditional:Npnn \gtl_if_eq:NN #1#2 { p , T , F , TF }
+ { \tl_if_eq:NNTF #1 #2 { \prg_return_true: } { \prg_return_false: } }
+\prg_new_conditional:Npnn \gtl_if_empty:N #1 { p , T , F , TF }
+ {
+ \tl_if_eq:NNTF #1 \c_empty_gtl
+ { \prg_return_true: } { \prg_return_false: }
+ }
+\prg_new_conditional:Npnn \gtl_if_tl:N #1 { p , T , F , TF }
+ { \exp_after:wN \__gtl_if_tl_return:w #1 }
+\cs_new:Npn \__gtl_if_tl_return:w \s__gtl #1#2#3 \s__stop
+ {
+ \tl_if_empty:nTF { #1 #3 }
+ { \prg_return_true: } { \prg_return_false: }
+ }
+\prg_new_conditional:Npnn \gtl_if_single_token:N #1 { p , T , F , TF }
+ { \exp_after:wN \__gtl_if_single_token_return:w #1 }
+\cs_new:Npn \__gtl_if_single_token_return:w \s__gtl #1#2#3 \s__stop
+ {
+ \bool_if:nTF
+ {
+ \tl_if_empty_p:n {#2}
+ && \tl_if_single_p:n { #1 #3 }
+ && \tl_if_empty_p:o { \use:n #1 #3 }
+ ||
+ \tl_if_single_token_p:n {#2}
+ && \tl_if_empty_p:n { #1 #3 }
+ }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ }
+\prg_new_conditional:Npnn \gtl_if_blank:N #1 { p , T , F , TF }
+ { \exp_after:wN \__gtl_if_blank_return:w #1 }
+\cs_new:Npn \__gtl_if_blank_return:w \s__gtl #1#2#3 \s__stop
+ {
+ \tl_if_blank:nTF { #1 #2 #3 }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ }
+\prg_new_conditional:Npnn \gtl_if_head_is_group_begin:N #1
+ { p , T , F , TF }
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \prg_return_false: }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_false: \use_none:n }
+ }
+\prg_new_conditional:Npnn \gtl_if_head_is_group_end:N #1
+ { p , T , F , TF }
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_true: }
+ { \prg_return_false: }
+ { \prg_return_false: \use_none:n }
+ }
+\prg_new_conditional:Npnn \gtl_if_head_is_space:N #1
+ { p , T , F , TF }
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_true: }
+ { \prg_return_false: \use_none:n }
+ }
+\prg_new_conditional:Npnn \gtl_if_head_is_N_type:N #1
+ { p , T , F , TF }
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_false: }
+ { \prg_return_true: \use_none:n }
+ }
+\prg_new_conditional:Npnn \gtl_if_head_eq_catcode:NN #1#2
+ { p , T , F , TF }
+ { \__gtl_if_head_eq_code_return:NNN \if_catcode:w #1#2 }
+\prg_new_conditional:Npnn \gtl_if_head_eq_charcode:NN #1#2
+ { p , T , F , TF }
+ { \__gtl_if_head_eq_code_return:NNN \if_charcode:w #1#2 }
+\cs_new:Npn \__gtl_if_head_eq_code_return:NNN #1#2#3
+ {
+ #1
+ \exp_not:N #3
+ \exp_after:wN \__gtl_head:wnnnnn #2
+ { ? \use_none:nn }
+ { \c_group_begin_token }
+ { \c_group_end_token }
+ { \c_space_token }
+ { \exp_not:N }
+ \prg_return_true:
+ \else:
+ \prg_return_false:
+ \fi:
+ }
+\prg_new_conditional:Npnn \gtl_if_head_eq_meaning:NN #1#2
+ { p , T , F , TF }
+ { \__gtl_if_head_eq_meaning_return:NN #1#2 }
+\cs_new:Npn \__gtl_if_head_eq_meaning_return:NN #1#2
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \if_false: }
+ { \if_meaning:w #2 \c_group_begin_token }
+ { \if_meaning:w #2 \c_group_end_token }
+ { \if_meaning:w #2 \c_space_token }
+ { \if_meaning:w #2 }
+ \prg_return_true:
+ \else:
+ \prg_return_false:
+ \fi:
+ }
+\cs_new:Npn \__gtl_head:wnnnnn \s__gtl #1#2#3 \s__stop #4#5#6#7#8
+ {
+ \tl_if_empty:nTF {#1}
+ {
+ \tl_if_empty:nTF {#2}
+ { \tl_if_empty:nTF {#3} {#4} {#5} }
+ { \__gtl_head_aux:nwnnnn {#2} \q_stop {#5} {#6} {#7} {#8} }
+ }
+ { \__gtl_head_aux:nwnnnn #1 \q_stop {#5} {#6} {#7} {#8} }
+ }
+\cs_new:Npn \__gtl_head_aux:nwnnnn #1#2 \q_stop #3#4#5#6
+ {
+ \tl_if_head_is_group:nTF {#1} {#3}
+ {
+ \tl_if_empty:nTF {#1} {#4}
+ {
+ \tl_if_head_is_space:nTF {#1} {#5}
+ { \if_false: { \fi: \__gtl_head_auxii:N #1 } {#6} }
+ }
+ }
+ }
+\cs_new:Npn \__gtl_head_auxii:N #1
+ {
+ \exp_after:wN \__gtl_head_auxiii:Nnn
+ \exp_after:wN #1
+ \exp_after:wN { \if_false: } \fi:
+ }
+\cs_new:Npn \__gtl_head_auxiii:Nnn #1#2#3 { #3 #1 }
+\cs_new:Npn \gtl_head:N #1
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { }
+ { \exp_after:wN { \if_false: } \fi: }
+ { \if_false: { \fi: } }
+ { ~ }
+ { \__gtl_exp_not_n:N }
+ }
+\cs_new:Npn \gtl_head_do:NN #1#2
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { #2 \q_no_value }
+ { \exp_after:wN #2 \exp_after:wN { \if_false: } \fi: }
+ { \if_false: { \fi: #2 } }
+ { #2 ~ }
+ { #2 }
+ }
+\cs_new_protected:Npn \gtl_get_left:NN #1#2
+ {
+ \exp_after:wN \__gtl_head:wnnnnn #1
+ { \gtl_set:Nn #2 { \q_no_value } }
+ { \gtl_set_eq:NN #2 \c_group_begin_gtl }
+ { \gtl_set_eq:NN #2 \c_group_end_gtl }
+ { \gtl_set:Nn #2 { ~ } }
+ { \gtl_set:Nn #2 }
+ }
+\cs_new_protected:Npn \gtl_pop_left:N #1
+ { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left:w #1 } }
+\cs_new_protected:Npn \gtl_gpop_left:N #1
+ { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left:w #1 } }
+\cs_new:Npn \__gtl_pop_left:w \s__gtl #1#2#3 \s__stop
+ {
+ \tl_if_empty:nTF {#1}
+ {
+ \tl_if_empty:nTF {#2}
+ { \__gtl_pop_left_auxi:n {#3} }
+ { \__gtl_pop_left_auxiv:nn {#2} {#3} }
+ }
+ { \__gtl_pop_left_auxv:nnn {#1} {#2} {#3} }
+ }
+\cs_new:Npn \__gtl_pop_left_auxi:n #1
+ {
+ \s__gtl
+ { }
+ \__gtl_pop_left_auxii:nnnw { } { } #1 \q_nil \q_stop
+ \s__stop
+ }
+\cs_new:Npn \__gtl_pop_left_auxii:nnnw #1#2#3
+ {
+ \quark_if_nil:nTF {#3}
+ { \__gtl_pop_left_auxiii:nnnw {#1} {#2} {#3} }
+ { \__gtl_pop_left_auxii:nnnw { #1 #2 } { {#3} } }
+ }
+\cs_new:Npn \__gtl_pop_left_auxiii:nnnw #1#2#3#4 \q_stop
+ {
+ \tl_if_empty:nTF {#4}
+ { \exp_not:n { #2 {#1} } }
+ { \__gtl_pop_left_auxii:nnnw { #1 #2 } { {#3} } }
+ }
+\cs_new:Npn \__gtl_pop_left_auxiv:nn #1#2
+ {
+ \s__gtl
+ { \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } } }
+ { \tl_if_head_is_space:nTF {#1} { \exp_not:f } { \tl_tail:n } {#1} }
+ { \exp_not:n {#2} }
+ \s__stop
+ }
+\cs_new:Npn \__gtl_pop_left_auxv:nnn #1#2#3
+ {
+ \s__gtl
+ { \if_false: { \fi: \__gtl_pop_left_auxvi:n #1 } }
+ { \exp_not:n {#2} }
+ { \exp_not:n {#3} }
+ \s__stop
+ }
+\cs_new:Npn \__gtl_pop_left_auxvi:n #1
+ {
+ \tl_if_empty:nF {#1}
+ {
+ \tl_if_head_is_group:nT {#1} { { \tl_head:n {#1} } }
+ {
+ \tl_if_head_is_space:nTF {#1}
+ { \exp_not:f } { \tl_tail:n } {#1}
+ }
+ }
+ \exp_after:wN \exp_not:n \exp_after:wN { \if_false: } \fi:
+ }
+\cs_new_protected:Npn \gtl_pop_left:NN #1#2
+ {
+ \gtl_get_left:NN #1 #2
+ \gtl_pop_left:N #1
+ }
+\cs_new_protected:Npn \gtl_gpop_left:NN #1#2
+ {
+ \gtl_get_left:NN #1 #2
+ \gtl_gpop_left:N #1
+ }
+\cs_new:Npn \gtl_left_tl:N #1
+ { \exp_after:wN \__gtl_left_tl:w #1 }
+\cs_new:Npn \__gtl_left_tl:w \s__gtl #1#2#3 \s__stop
+ { \tl_if_empty:nTF {#1} { \exp_not:n {#2} } { \tl_head:n {#1} } }
+\cs_new_protected:Npn \gtl_pop_left_tl:N #1
+ { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left_tl:w #1 } }
+\cs_new_protected:Npn \gtl_gpop_left_tl:N #1
+ { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left_tl:w #1 } }
+\cs_new:Npn \__gtl_pop_left_tl:w \s__gtl #1#2#3 \s__stop
+ {
+ \s__gtl
+ \tl_if_empty:nTF {#1}
+ { { } { } }
+ {
+ { { } \tl_tail:n {#1} }
+ { \exp_not:n {#2} }
+ }
+ { \exp_not:n {#3} }
+ \s__stop
+ }
+\cs_new:Npn \gtl_left_item:NF #1
+ { \exp_after:wN \__gtl_left_item:wF #1 }
+\cs_new:Npn \__gtl_left_item:wF \s__gtl #1#2#3 \s__stop
+ { \__gtl_left_item_auxi:nwF #1 {#2} \q_stop }
+\cs_new:Npn \__gtl_left_item_auxi:nwF #1#2 \q_stop #3
+ { \tl_if_blank:nTF {#1} {#3} { \tl_head:n {#1} } }
+\prg_new_protected_conditional:Npnn \gtl_pop_left_item:NN #1#2 { TF , T , F }
+ { \exp_after:wN \__gtl_pop_left_item:wNNN #1#2 \tl_set:Nx #1 }
+\prg_new_protected_conditional:Npnn \gtl_gpop_left_item:NN #1#2 { TF , T , F }
+ { \exp_after:wN \__gtl_pop_left_item:wNNN #1#2 \tl_gset:Nx #1 }
+\cs_new_protected:Npn \__gtl_pop_left_item:wNNN
+ \s__gtl #1#2#3 \s__stop #4#5#6
+ {
+ \tl_if_empty:nTF {#1}
+ {
+ \tl_if_blank:nTF {#2} { \prg_return_false: }
+ {
+ \tl_set:Nx #4 { \tl_head:n {#2} }
+ #5 #6
+ {
+ \s__gtl { } { \tl_tail:n {#2} }
+ { \exp_not:n {#3} } \s__stop
+ }
+ \prg_return_true:
+ }
+ }
+ {
+ \__gtl_pop_left_item_aux:nwnnNNN #1 \q_nil \q_stop
+ {#2} {#3} #4 #5 #6
+ }
+ }
+\cs_new_protected:Npn \__gtl_pop_left_item_aux:nwnnNNN
+ #1#2 \q_stop #3#4#5#6#7
+ {
+ \tl_if_blank:nTF {#1} { \prg_return_false: }
+ {
+ \tl_set:Nx #5 { \tl_head:n {#1} }
+ #6 #7
+ {
+ \s__gtl
+ { { \tl_tail:n {#1} } \__gtl_strip_nil_mark:w #2 \q_mark }
+ { \exp_not:n {#3} }
+ { \exp_not:n {#4} }
+ \s__stop
+ }
+ \prg_return_true:
+ }
+ }
+\cs_new:Npn \gtl_left_text:NF #1
+ { \exp_after:wN \__gtl_left_text:wF #1 }
+\cs_new:Npn \__gtl_left_text:wF \s__gtl #1#2#3 \s__stop
+ {
+ \tl_if_empty:nTF {#1}
+ { \__gtl_left_text_auxi:nwF {#2} \q_stop }
+ { \__gtl_left_text_auxi:nwF #1 \q_stop }
+ }
+\cs_new:Npn \__gtl_left_text_auxi:nwF #1#2 \q_stop
+ { \__gtl_left_text_auxii:wnwF #1 \q_mark { } \q_mark \q_stop }
+\cs_new:Npn \__gtl_left_text_auxii:wnwF #1 #
+ { \__gtl_left_text_auxiii:nnwF {#1} }
+\cs_new:Npn \__gtl_left_text_auxiii:nnwF #1#2 #3 \q_mark #4 \q_stop #5
+ { \tl_if_empty:nTF {#4} {#5} { \exp_not:n { #1 {#2} } } }
+\cs_new_protected:Npn \gtl_pop_left_text:N #1
+ { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left_text:w #1 } }
+\cs_new_protected:Npn \gtl_gpop_left_text:N #1
+ { \tl_gset:Nx #1 { \exp_after:wN \__gtl_pop_left_text:w #1 } }
+\cs_new:Npn \__gtl_pop_left_text:w \s__gtl #1#2#3 \s__stop
+ {
+ \s__gtl
+ \tl_if_empty:nTF {#1}
+ {
+ { }
+ { \__gtl_pop_left_text_auxi:n {#2} }
+ }
+ {
+ { \__gtl_pop_left_text_auxiv:nw #1 \q_nil \q_mark }
+ { \exp_not:n {#2} }
+ }
+ { \exp_not:n {#3} }
+ \s__stop
+ }
+\cs_new:Npn \__gtl_pop_left_text_auxi:n #1
+ {
+ \__gtl_pop_left_text_auxii:wnw #1
+ \q_nil \q_mark { } \q_mark \q_stop
+ }
+\cs_new:Npn \__gtl_pop_left_text_auxii:wnw #1 #
+ { \__gtl_pop_left_text_auxiii:nnw {#1} }
+\cs_new:Npn \__gtl_pop_left_text_auxiii:nnw #1#2#3 \q_mark #4 \q_stop
+ {
+ \tl_if_empty:nTF {#4}
+ { \__gtl_strip_nil_mark:w #1 }
+ { \__gtl_strip_nil_mark:w #3 \q_mark }
+ }
+\cs_new:Npn \__gtl_pop_left_text_auxiv:nw #1
+ {
+ { \__gtl_pop_left_text_auxi:n {#1} }
+ \__gtl_strip_nil_mark:w
+ }
+\cs_new:Npn \__gtl_tl_count:n #1
+ { \int_eval:n { \c_zero \__gtl_tl_count_loop:n #1 \q_nil \q_stop } }
+\cs_new:Npn \__gtl_tl_count_loop:n #1
+ {
+ \quark_if_nil:nTF {#1}
+ { \__gtl_tl_count_test:w }
+ { + \c_one \__gtl_tl_count_loop:n }
+ }
+\cs_new:Npn \__gtl_tl_count_test:w #1 \q_stop
+ { \tl_if_empty:nF {#1} { + \c_one \__gtl_tl_count_loop:n #1 \q_stop } }
+\cs_new:Npn \gtl_extra_end:N #1
+ { \exp_after:wN \__gtl_extra_end:w #1 }
+\cs_new:Npn \__gtl_extra_end:w \s__gtl #1#2#3 \s__stop
+ { \__gtl_tl_count:n {#1} }
+\cs_new:Npn \gtl_extra_begin:N #1
+ { \exp_after:wN \__gtl_extra_begin:w #1 }
+\cs_new:Npn \__gtl_extra_begin:w \s__gtl #1#2#3 \s__stop
+ { \__gtl_tl_count:n {#3} }
+\cs_new:Npn \gtl_count_tokens:N #1
+ { \exp_after:wN \__gtl_count_tokens:w #1 }
+\cs_new:Npn \__gtl_count_tokens:w \s__gtl #1#2#3 \s__stop
+ {
+ \int_eval:n
+ { \c_minus_one \__gtl_count_auxi:nw #1 {#2} #3 \q_nil \q_stop }
+ }
+\cs_new:Npn \__gtl_count_auxi:nw #1
+ {
+ \quark_if_nil:nTF {#1}
+ { \__gtl_count_auxii:w }
+ {
+ + \c_one
+ \__gtl_count_auxiii:n {#1}
+ \__gtl_count_auxi:nw
+ }
+ }
+\cs_new:Npn \__gtl_count_auxii:w #1 \q_stop
+ {
+ \tl_if_empty:nF {#1}
+ {
+ + \c_two
+ \__gtl_count_auxi:nw #1 \q_stop
+ }
+ }
+\cs_new:Npn \__gtl_count_auxiii:n #1
+ {
+ \tl_if_empty:nF {#1}
+ {
+ \tl_if_head_is_group:nTF {#1}
+ {
+ + \c_two
+ \exp_args:No \__gtl_count_auxiii:n { \use:n #1 }
+ }
+ {
+ + \c_one
+ \tl_if_head_is_N_type:nTF {#1}
+ { \exp_args:No \__gtl_count_auxiii:n { \use_none:n #1 } }
+ { \exp_args:Nf \__gtl_count_auxiii:n {#1} }
+ }
+ }
+ }
+%%
+%%
+%% End of file `gtl.sty'.