%% %% 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+gtl@gmail.com). %% %% File: gtl.dtx Copyright (C) 2013,2015,2017,2018 Bruno Le Floch %% %% This work may be distributed and/or modified under the %% conditions of the LaTeX Project Public License, either version 1.3c %% of this license or (at your option) any later version. %% The latest version of this license is in %% http://www.latex-project.org/lppl.txt %% %% This work has the LPPL maintenance status 'maintained' %% and the current maintainer is Bruno Le Floch. %% %% This work consists of the files gtl.dtx and gtl.ins and %% derived file gtl.sty. %% ----------------------------------------------------------------------- \begingroup\expandafter\expandafter\expandafter\endgroup \expandafter\ifx\csname RequirePackage\endcsname\relax \input expl3-generic.tex \else \RequirePackage{expl3}[2017/11/14] \fi \ExplSyntaxOn \cs_if_exist:NTF \ProvidesExplPackage { \cs_new_eq:NN \__gtl_end_package_hook: \prg_do_nothing: \ExplSyntaxOff \ProvidesExplPackage } { \cs_new_eq:NN \__gtl_end_package_hook: \ExplSyntaxOff \group_begin: \ExplSyntaxOff \cs_set_protected:Npn \__gtl_tmp:w #1#2#3#4 { \group_end: \tl_gset:cx { ver @ #1 . sty } { #2 ~ v#3 ~ #4 } \cs_if_exist_use:NF \wlog { \iow_log:x } { Package: ~ #1 ~ #2 ~ v#3 ~ #4 } } \__gtl_tmp:w } {gtl} {2018/12/28} {0.5} {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: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} } \cs_new_eq:NN \s__gtl \scan_stop: \cs_new_protected:Npn \gtl_set:Nn { \__gtl_set:NNn \tl_set:Nn } \cs_new_protected:Npn \gtl_gset:Nn { \__gtl_set:NNn \tl_gset:Nn } \cs_new_protected:Npn \gtl_const:Nn { \__gtl_set:NNn \tl_const:Nn } \cs_new_protected:Npn \gtl_set:Nx { \__gtl_set:NNn \tl_set:Nx } \cs_new_protected:Npn \gtl_gset:Nx { \__gtl_set:NNn \tl_gset:Nx } \cs_new_protected: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} { } } } \gtl_const:Nn \c_empty_gtl { } \tl_const:Nn \c_group_end_gtl { \s__gtl { { } } { } { } } \tl_const:Nn \c_group_begin_gtl { \s__gtl { } { } { { } } } \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 #4 { \tl_if_empty:nTF {#1} { \exp_not:n { \s__gtl { } { #4 #2 } {#3} } } { \s__gtl { \exp_not:o { \__gtl_brace:nn {#4} #1 } } { \exp_not:n {#2} } { \exp_not:n {#3} } } } \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 #4 { \tl_if_empty:nTF {#3} { \exp_not:n { \s__gtl {#1} { #2 #4 } { } } } { \s__gtl { \exp_not:n {#1} } { \exp_not:n {#2} } { \exp_not:o { \__gtl_brace_swap:nn {#4} #3 } } } } \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__gtl #4#5#6 { \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} } \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__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__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 { \__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 { \__gtl_show:NNN \tl_show:n \tl_show:N } \cs_new_protected:Npn \gtl_log:N { \__gtl_show:NNN \tl_log:n \tl_log:N } \cs_new_protected:Npn \__gtl_show:NNN #1#2#3 { \gtl_if_exist:NTF #3 { \exp_args:Nx #1 { \token_to_str:N #3 = \gtl_to_str:N #3 } } { #2 #3 } } \prg_new_eq_conditional:NNn \gtl_if_eq:NN \tl_if_eq:NN { p , T , F , TF } \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 { \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 #1 } \cs_new:Npn \__gtl_if_single_token_return:w \s__gtl #1#2#3 #4 { \tl_if_empty:nTF { #1 #3 } { \tl_if_single_token:nTF {#2} { \prg_return_true: } { \prg_return_false: } } { \gtl_if_eq:NNTF #4 \c_group_begin_gtl { \prg_return_true: } { \gtl_if_eq:NNTF #4 \c_group_end_gtl { \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 { \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 #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:Npn \gtl_head_do:NNT #1#2#3 { \gtl_if_empty:NTF #1 { } { \gtl_head_do:NN #1 #2 #3 } } \cs_new:Npn \gtl_head_do:NNF #1#2#3 { \gtl_if_empty:NTF #1 {#3} { \gtl_head_do:NN #1 #2 } } \cs_new:Npn \gtl_head_do:NNTF #1#2#3#4 { \gtl_if_empty:NTF #1 {#4} { \gtl_head_do:NN #1 #2 #3 } } \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 { \gtl_if_empty:NF #1 { \tl_set:Nx #1 { \exp_after:wN \__gtl_pop_left:w #1 } } } \cs_new_protected:Npn \gtl_gpop_left:N #1 { \gtl_if_empty:NF #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 { \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 } \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} } } \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} } } \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 { \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__gtl \tl_if_empty:nTF {#1} { { } { } } { { { } \tl_tail:n {#1} } { \exp_not:n {#2} } } { \exp_not:n {#3} } } \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 { \__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 #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} } } \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} } } \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 { \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__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} } } \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 { 0 \__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 } { + 1 \__gtl_tl_count_loop:n } } \cs_new:Npn \__gtl_tl_count_test:w #1 \q_stop { \tl_if_empty:nF {#1} { + 1 \__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 { \__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 { \__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 { \int_eval:n { -1 \__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 } { + 1 \__gtl_count_auxiii:n {#1} \__gtl_count_auxi:nw } } \cs_new:Npn \__gtl_count_auxii:w #1 \q_stop { \tl_if_empty:nF {#1} { + 2 \__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} { + 2 \exp_args:No \__gtl_count_auxiii:n { \use:n #1 } } { + 1 \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} } } } } \__gtl_end_package_hook: %% %% %% End of file `gtl.sty'.