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authorKarl Berry <karl@freefriends.org>2012-02-28 00:40:17 +0000
committerKarl Berry <karl@freefriends.org>2012-02-28 00:40:17 +0000
commited49b3dfe19b91f9fd96ab70fe95dcda8fba24c8 (patch)
tree0eb59527efd68f813d629e7d0977fe31d8d6419f /Master/texmf-dist/tex/latex/l3experimental/l3str/l3regex-trace.sty
parentb1436d6ee293a02df32a18832d21c54348335565 (diff)
l3experimental 3471 (26feb12)
git-svn-id: svn://tug.org/texlive/trunk@25523 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/latex/l3experimental/l3str/l3regex-trace.sty')
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diff --git a/Master/texmf-dist/tex/latex/l3experimental/l3str/l3regex-trace.sty b/Master/texmf-dist/tex/latex/l3experimental/l3str/l3regex-trace.sty
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+%%
+%% This is file `l3regex-trace.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% l3regex.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: l3regex.dtx Copyright (C) 2011-2012 The 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 "l3experimental 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
+%% prior consultation with the LaTeX3 Project.
+%%
+%% -----------------------------------------------------------------------
+\RequirePackage{expl3}
+\GetIdInfo$Id: l3regex.dtx 3463 2012-02-26 15:05:14Z bruno $
+ {L3 Experimental Regular Expressions}
+\ProvidesExplPackage
+ {\ExplFileName}{\ExplFileDate}{\ExplFileVersion}{\ExplFileDescription}
+\RequirePackage{l3tl-build, l3tl-analysis, l3flag, l3str}
+\cs_generate_variant:Nn \tl_to_str:n { V }
+\cs_new:Npn \regex_tmp:w { }
+\tl_new:N \l_regex_internal_a_tl
+\tl_new:N \l_regex_internal_b_tl
+\int_new:N \l_regex_internal_a_int
+\int_new:N \l_regex_internal_b_int
+\int_new:N \l_regex_internal_c_int
+\bool_new:N \l_regex_internal_bool
+\seq_new:N \l_regex_internal_seq
+\tl_new:N \g_regex_internal_tl
+\tl_const:Nn \c_regex_no_match_regex
+ {
+ \regex_branch:n
+ { \regex_class:NnnnN \c_true_bool { } { 1 } { 0 } \c_true_bool }
+ }
+\int_new:N \l_regex_balance_int
+\cs_new_protected:Npn \regex_break_true:w
+ #1 \regex_break_point:TF #2 #3 {#2}
+\cs_new_protected:Npn \regex_break_point:TF #1 #2 { #2 }
+\cs_new_protected:Npn \regex_item_reverse:n #1
+ {
+ #1
+ \regex_break_point:TF { } \regex_break_true:w
+ }
+\cs_new_protected:Npn \regex_item_caseful_equal:n #1
+ {
+ \if_num:w #1 = \l_regex_current_char_int
+ \exp_after:wN \regex_break_true:w
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_caseful_range:nn #1 #2
+ {
+ \reverse_if:N \if_num:w #1 > \l_regex_current_char_int
+ \reverse_if:N \if_num:w #2 < \l_regex_current_char_int
+ \exp_after:wN \exp_after:wN \exp_after:wN \regex_break_true:w
+ \fi:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_caseless_equal:n #1
+ {
+ \if_num:w #1 = \l_regex_current_char_int
+ \exp_after:wN \regex_break_true:w
+ \fi:
+ \if_num:w \l_regex_case_changed_char_int = \c_max_int
+ \regex_compute_case_changed_char:
+ \fi:
+ \if_num:w #1 = \l_regex_case_changed_char_int
+ \exp_after:wN \regex_break_true:w
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_caseless_range:nn #1 #2
+ {
+ \reverse_if:N \if_num:w #1 > \l_regex_current_char_int
+ \reverse_if:N \if_num:w #2 < \l_regex_current_char_int
+ \exp_after:wN \exp_after:wN \exp_after:wN \regex_break_true:w
+ \fi:
+ \fi:
+ \if_num:w \l_regex_case_changed_char_int = \c_max_int
+ \regex_compute_case_changed_char:
+ \fi:
+ \reverse_if:N \if_num:w #1 > \l_regex_case_changed_char_int
+ \reverse_if:N \if_num:w #2 < \l_regex_case_changed_char_int
+ \exp_after:wN \exp_after:wN \exp_after:wN \regex_break_true:w
+ \fi:
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_compute_case_changed_char:
+ {
+ \int_set_eq:NN \l_regex_case_changed_char_int \l_regex_current_char_int
+ \if_num:w \l_regex_current_char_int < \c_ninety_one
+ \if_num:w \l_regex_current_char_int < \c_sixty_five
+ \else:
+ \int_add:Nn \l_regex_case_changed_char_int { \c_thirty_two }
+ \fi:
+ \else:
+ \if_num:w \l_regex_current_char_int < \c_one_hundred_twenty_three
+ \if_num:w \l_regex_current_char_int < \c_ninety_seven
+ \else:
+ \int_sub:Nn \l_regex_case_changed_char_int { \c_thirty_two }
+ \fi:
+ \fi:
+ \fi:
+ }
+\cs_new_eq:NN \regex_item_equal:n ?
+\cs_new_eq:NN \regex_item_range:nn ?
+\cs_new_protected:Npn \regex_item_catcode_aux:
+ {
+ "
+ \if_case:w \l_regex_current_catcode_int
+ 1 \or: 4 \or: 10 \or: 40
+ \or: 100 \or: \or: 1000 \or: 4000
+ \or: 10000 \or: \or: 100000 \or: 400000
+ \or: 1000000 \or: 4000000 \else: 1*\c_zero
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_catcode:nT #1
+ {
+ \if_int_odd:w \int_eval:w #1 / \regex_item_catcode_aux: \int_eval_end:
+ \exp_after:wN \use:n
+ \else:
+ \exp_after:wN \use_none:n
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_catcode_reverse:nT #1#2
+ { \regex_item_catcode:nT {#1} { \regex_item_reverse:n {#2} } }
+\cs_new_protected:Npn \regex_item_exact:nn #1#2
+ {
+ \if_num:w #1 = \l_regex_current_catcode_int
+ \if_num:w #2 = \l_regex_current_char_int
+ \exp_after:wN \exp_after:wN \exp_after:wN \regex_break_true:w
+ \fi:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_item_exact_cs:c #1
+ {
+ \int_compare:nNnTF \l_regex_current_catcode_int = \c_zero
+ {
+ \str_if_eq:xxTF
+ {
+ \exp_after:wN \exp_after:wN \exp_after:wN \cs_to_str:N
+ \tex_the:D \tex_toks:D \l_regex_current_pos_int
+ }
+ { #1 }
+ { \regex_break_true:w } { }
+ }
+ { }
+ }
+\cs_new_protected:Npn \regex_item_cs:n #1
+ {
+ \int_compare:nNnT \l_regex_current_catcode_int = \c_zero
+ {
+ \group_begin:
+ \regex_single_match:
+ \regex_disable_submatches:
+ \regex_build_for_cs:n {#1}
+ \bool_set_eq:NN \l_regex_saved_success_bool \g_regex_success_bool
+ \exp_args:Nx \regex_match:n
+ {
+ \exp_after:wN \exp_after:wN
+ \exp_after:wN \cs_to_str:N
+ \tex_the:D \tex_toks:D \l_regex_current_pos_int
+ }
+ \if_meaning:w \c_true_bool \g_regex_success_bool
+ \group_insert_after:N \regex_break_true:w
+ \fi:
+ \bool_gset_eq:NN \g_regex_success_bool \l_regex_saved_success_bool
+ \group_end:
+ }
+ }
+\cs_new_protected_nopar:Npn \regex_prop_d:
+ { \regex_item_caseful_range:nn \c_forty_eight { 57 } } % 0--9
+\cs_new_protected_nopar:Npn \regex_prop_h:
+ {
+ \regex_item_caseful_equal:n \c_thirty_two % space
+ \regex_item_caseful_equal:n \c_nine % tab
+ }
+\cs_new_protected_nopar:Npn \regex_prop_s:
+ {
+ \regex_item_caseful_equal:n \c_thirty_two % space
+ \regex_item_caseful_equal:n \c_nine % tab
+ \regex_item_caseful_equal:n \c_ten % lf
+ \regex_item_caseful_equal:n \c_twelve % ff
+ \regex_item_caseful_equal:n \c_thirteen % cr
+ }
+\cs_new_protected_nopar:Npn \regex_prop_v:
+ { \regex_item_caseful_range:nn \c_ten \c_thirteen } % lf, vtab, ff, cr
+\cs_new_protected_nopar:Npn \regex_prop_w:
+ {
+ \regex_item_caseful_range:nn \c_ninety_seven { 122 } % a--z
+ \regex_item_caseful_range:nn \c_sixty_five { 90 } % A--Z
+ \regex_item_caseful_range:nn \c_forty_eight { 57 } % 0--9
+ \regex_item_caseful_equal:n { 95 } % _
+ }
+\cs_new_protected_nopar:Npn \regex_prop_N:
+ { \regex_item_reverse:n { \regex_item_caseful_equal:n \c_ten } }
+\cs_new_protected_nopar:Npn \regex_posix_alnum:
+ { \regex_posix_alpha: \regex_posix_digit: }
+\cs_new_protected_nopar:Npn \regex_posix_alpha:
+ { \regex_posix_lower: \regex_posix_upper: }
+\cs_new_protected_nopar:Npn \regex_posix_ascii:
+ { \regex_item_caseful_range:nn \c_zero \c_one_hundred_twenty_seven }
+\cs_new_eq:NN \regex_posix_blank: \regex_prop_h:
+\cs_new_protected_nopar:Npn \regex_posix_cntrl:
+ {
+ \regex_item_caseful_range:nn \c_zero { 31 }
+ \regex_item_caseful_equal:n \c_one_hundred_twenty_seven
+ }
+\cs_new_eq:NN \regex_posix_digit: \regex_prop_d:
+\cs_new_protected_nopar:Npn \regex_posix_graph:
+ { \regex_item_caseful_range:nn { 33 } { 126 } }
+\cs_new_protected_nopar:Npn \regex_posix_lower:
+ { \regex_item_caseful_range:nn \c_ninety_seven { 122 } }
+\cs_new_protected_nopar:Npn \regex_posix_print:
+ { \regex_item_caseful_range:nn \c_thirty_two { 126 } }
+\cs_new_protected_nopar:Npn \regex_posix_punct:
+ {
+ \regex_item_caseful_range:nn { 33 } { 47 }
+ \regex_item_caseful_range:nn { 58 } { 64 }
+ \regex_item_caseful_range:nn { 91 } { 96 }
+ \regex_item_caseful_range:nn { 123 } { 126 }
+ }
+\cs_new_protected_nopar:Npn \regex_posix_space:
+ {
+ \regex_item_caseful_equal:n \c_thirty_two
+ \regex_item_caseful_range:nn \c_nine \c_thirteen
+ }
+\cs_new_protected_nopar:Npn \regex_posix_upper:
+ { \regex_item_caseful_range:nn \c_sixty_five { 90 } }
+\cs_new_eq:NN \regex_posix_word: \regex_prop_w:
+\cs_new_protected_nopar:Npn \regex_posix_xdigit:
+ {
+ \regex_posix_digit:
+ \regex_item_caseful_range:nn \c_sixty_five { 70 }
+ \regex_item_caseful_range:nn \c_ninety_seven { 102 }
+ }
+\cs_new_protected:Npn \regex_escape_use:nnnn #1#2#3#4
+ {
+ \trace_push:nnn { regex } { 1 } { regex_escape_use:nnnn }
+ \tl_set_build:Nw \l_regex_internal_a_tl
+ \cs_set_nopar:Npn \regex_escape_unescaped:N ##1 { #1 }
+ \cs_set_nopar:Npn \regex_escape_escaped:N ##1 { #2 }
+ \cs_set_nopar:Npn \regex_escape_raw:N ##1 { #3 }
+ \int_set:Nn \tex_escapechar:D { 92 }
+ \str_gset_other:Nn \g_regex_internal_tl { #4 }
+ \tl_set:Nx \l_regex_internal_b_tl
+ {
+ \exp_after:wN \regex_escape_loop:N \g_regex_internal_tl
+ { break } \prg_break_point:n { }
+ }
+ \tl_build_one:o \l_regex_internal_b_tl
+ \tl_build_end:
+ \trace_pop:nnn { regex } { 1 } { regex_escape_use:nnnn }
+ \l_regex_internal_a_tl
+ }
+\cs_new:Npn \regex_escape_loop:N #1
+ {
+ \cs_if_exist_use:cF { regex_escape_\token_to_str:N #1:w }
+ { \regex_escape_unescaped:N #1 }
+ \regex_escape_loop:N
+ }
+\cs_new_nopar:cpn { regex_escape_ \c_backslash_str :w }
+ \regex_escape_loop:N #1
+ {
+ \cs_if_exist_use:cF { regex_escape_/\token_to_str:N #1:w }
+ { \regex_escape_escaped:N #1 }
+ \regex_escape_loop:N
+ }
+\cs_new_eq:NN \regex_escape_unescaped:N ?
+\cs_new_eq:NN \regex_escape_escaped:N ?
+\cs_new_eq:NN \regex_escape_raw:N ?
+\cs_new_eq:NN \regex_escape_break:w \prg_map_break:
+\cs_new_nopar:cpn { regex_escape_/break:w }
+ {
+ \if_false: { \fi: }
+ \msg_kernel_error:nn { regex } { trailing-backslash }
+ \exp_after:wN \use_none:n \exp_after:wN { \if_false: } \fi:
+ }
+\cs_new_nopar:cpn { regex_escape_~:w } { }
+\cs_new_nopar:cpx { regex_escape_/a:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^G }
+\cs_new_nopar:cpx { regex_escape_/t:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^I }
+\cs_new_nopar:cpx { regex_escape_/n:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^J }
+\cs_new_nopar:cpx { regex_escape_/f:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^L }
+\cs_new_nopar:cpx { regex_escape_/r:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^M }
+\cs_new_nopar:cpx { regex_escape_/e:w }
+ { \exp_not:N \regex_escape_raw:N \iow_char:N \^^[ }
+\cs_new:cpn { regex_escape_/x:w } \regex_escape_loop:N
+ {
+ \exp_after:wN \regex_escape_x_end:w
+ \int_value:w "0 \regex_escape_x_test:N
+ }
+\cs_new:Npn \regex_escape_x_end:w #1 ;
+ {
+ \int_compare:nNnTF {#1} < \c_two_hundred_fifty_six
+ {
+ \exp_last_unbraced:Nf \regex_escape_raw:N
+ { \str_output_byte:n {#1} }
+ }
+ { \regex_escape_x_large:n {#1} }
+ }
+\group_begin:
+ \char_set_catcode_other:n { 0 }
+ \cs_new:Npn \regex_escape_x_large:n #1
+ {
+ \if_false: { \fi: }
+ \tl_build_one:o \l_regex_internal_b_tl
+ \int_compare:nNnTF {#1} > \c_max_char_int
+ {
+ \msg_kernel_error:nnx { regex } { x-overflow } {#1}
+ \tl_set:Nx \l_regex_internal_b_tl
+ { \if_false: } \fi: \regex_escape_loop:N
+ }
+ {
+ \char_set_lccode:nn { \c_zero } {#1}
+ \tl_to_lowercase:n
+ {
+ \tl_set:Nx \l_regex_internal_b_tl
+ { \if_false: } \fi:
+ \regex_escape_raw:N ^^@
+ \regex_escape_loop:N
+ }
+ }
+ }
+\group_end:
+\cs_new:Npn \regex_escape_x_test:N #1
+ {
+ \str_if_eq:xxTF {#1} { break } { ; }
+ {
+ \if_charcode:w \c_space_token #1
+ \exp_after:wN \regex_escape_x_test:N
+ \else:
+ \exp_after:wN \regex_escape_x_test_ii:N
+ \exp_after:wN #1
+ \fi:
+ }
+ }
+\cs_new:Npn \regex_escape_x_test_ii:N #1
+ {
+ \if_charcode:w \c_lbrace_str #1
+ \exp_after:wN \regex_escape_x_loop:N
+ \else:
+ \str_aux_hexadecimal_use:NTF #1
+ { \exp_after:wN \regex_escape_x_ii:N }
+ { ; \exp_after:wN \regex_escape_loop:N \exp_after:wN #1 }
+ \fi:
+ }
+\cs_new:Npn \regex_escape_x_ii:N #1
+ {
+ \str_if_eq:xxTF {#1} { break } { ; }
+ {
+ \str_aux_hexadecimal_use:NTF #1
+ { ; \regex_escape_loop:N }
+ { ; \regex_escape_loop:N #1 }
+ }
+ }
+\cs_new:Npn \regex_escape_x_loop:N #1
+ {
+ \str_aux_hexadecimal_use:NTF #1
+ { \regex_escape_x_loop:N }
+ {
+ \token_if_eq_charcode:NNTF \c_space_token #1
+ { \regex_escape_x_loop:N }
+ {
+ ;
+ \exp_after:wN \token_if_eq_charcode:NNTF \c_rbrace_str #1
+ { \regex_escape_loop:N }
+ {
+ \if_false: { \fi: }
+ \tl_build_one:o \l_regex_internal_b_tl
+ \msg_kernel_error:nn { regex } { x-missing-rbrace } {#1}
+ \tl_set:Nx \l_regex_internal_b_tl
+ { \if_false: } \fi: \regex_escape_loop:N #1
+ }
+ }
+ }
+ }
+\prg_new_conditional:Npnn \regex_char_if_special:N #1 { TF }
+ {
+ \if_num:w `#1 < \c_ninety_one
+ \if_num:w `#1 < \c_fifty_eight
+ \if_num:w `#1 < \c_forty_eight
+ \if_num:w `#1 < \c_thirty_two
+ \prg_return_false: \else: \prg_return_true: \fi:
+ \else: \prg_return_false: \fi:
+ \else:
+ \if_num:w `#1 < \c_sixty_five
+ \prg_return_true: \else: \prg_return_false: \fi:
+ \fi:
+ \else:
+ \if_num:w `#1 < \c_one_hundred_twenty_three
+ \if_num:w `#1 < \c_ninety_seven
+ \prg_return_true: \else: \prg_return_false: \fi:
+ \else:
+ \if_num:w `#1 < \c_one_hundred_twenty_seven
+ \prg_return_true: \else: \prg_return_false: \fi:
+ \fi:
+ \fi:
+ }
+\prg_new_conditional:Npnn \regex_char_if_alphanumeric:N #1 { TF }
+ {
+ \if_num:w `#1 < \c_ninety_one
+ \if_num:w `#1 < \c_fifty_eight
+ \if_num:w `#1 < \c_forty_eight
+ \prg_return_false: \else: \prg_return_true: \fi:
+ \else:
+ \if_num:w `#1 < \c_sixty_five
+ \prg_return_false: \else: \prg_return_true: \fi:
+ \fi:
+ \else:
+ \if_num:w `#1 < \c_one_hundred_twenty_three
+ \if_num:w `#1 < \c_ninety_seven
+ \prg_return_false: \else: \prg_return_true: \fi:
+ \else:
+ \prg_return_false:
+ \fi:
+ \fi:
+ }
+\int_new:N \l_regex_group_level_int
+\int_new:N \l_regex_mode_int
+\int_new:N \l_regex_catcodes_int
+\int_new:N \l_regex_default_catcodes_int
+\bool_new:N \l_regex_catcodes_bool
+\int_const:Nn \c_regex_catcode_C_int { "1 }
+\int_const:Nn \c_regex_catcode_B_int { "4 }
+\int_const:Nn \c_regex_catcode_E_int { "10 }
+\int_const:Nn \c_regex_catcode_M_int { "40 }
+\int_const:Nn \c_regex_catcode_T_int { "100 }
+\int_const:Nn \c_regex_catcode_P_int { "1000 }
+\int_const:Nn \c_regex_catcode_U_int { "4000 }
+\int_const:Nn \c_regex_catcode_D_int { "10000 }
+\int_const:Nn \c_regex_catcode_S_int { "100000 }
+\int_const:Nn \c_regex_catcode_L_int { "400000 }
+\int_const:Nn \c_regex_catcode_O_int { "1000000 }
+\int_const:Nn \c_regex_catcode_A_int { "4000000 }
+\int_const:Nn \c_regex_all_catcodes_int { "5515155 }
+\cs_new_eq:NN \l_regex_internal_regex \c_regex_no_match_regex
+\seq_new:N \l_regex_show_prefix_seq
+\int_new:N \l_regex_show_lines_int
+\cs_new_protected:Npn \regex_get_digits:NTFw #1#2#3#4#5
+ {
+ \regex_if_raw_digit:NNTF #4 #5
+ { #1 = #5 \regex_get_digits_loop:nw {#2} }
+ { #3 #4 #5 }
+ }
+\cs_new:Npn \regex_get_digits_loop:nw #1#2#3
+ {
+ \regex_if_raw_digit:NNTF #2 #3
+ { #3 \regex_get_digits_loop:nw {#1} }
+ { \scan_stop: #1 #2 #3 }
+ }
+\prg_new_conditional:Npnn \regex_if_raw_digit:NN #1#2 { TF }
+ {
+ \if_meaning:w \regex_compile_raw:N #1
+ \if_int_compare:w \c_one < 1 #2 \exp_stop_f:
+ \prg_return_true:
+ \else:
+ \prg_return_false:
+ \fi:
+ \else:
+ \prg_return_false:
+ \fi:
+ }
+\cs_new_nopar:Npn \regex_if_in_class:TF
+ {
+ \if_int_odd:w \l_regex_mode_int
+ \exp_after:wN \use_i:nn
+ \else:
+ \exp_after:wN \use_ii:nn
+ \fi:
+ }
+\cs_new_nopar:Npn \regex_if_in_cs:TF
+ {
+ \if_int_odd:w \l_regex_mode_int
+ \exp_after:wN \use_ii:nn
+ \else:
+ \if_int_compare:w \l_regex_mode_int < \c_zero
+ \exp_after:wN \exp_after:wN \exp_after:wN \use_i:nn
+ \else:
+ \exp_after:wN \exp_after:wN \exp_after:wN \use_ii:nn
+ \fi:
+ \fi:
+ }
+\cs_new_nopar:Npn \regex_if_in_class_or_catcode:TF
+ {
+ \if_int_odd:w \l_regex_mode_int
+ \exp_after:wN \use_i:nn
+ \else:
+ \if_int_compare:w \l_regex_mode_int > \c_zero
+ \exp_after:wN \exp_after:wN \exp_after:wN \use_i:nn
+ \else:
+ \exp_after:wN \exp_after:wN \exp_after:wN \use_ii:nn
+ \fi:
+ \fi:
+ }
+\cs_new_nopar:Npn \regex_if_within_catcode:TF
+ {
+ \if_int_compare:w \l_regex_mode_int > \c_zero
+ \exp_after:wN \use_i:nn
+ \else:
+ \exp_after:wN \use_ii:nn
+ \fi:
+ }
+\cs_new_protected:Npn \regex_chk_c_allowed:T
+ {
+ \if_num:w \l_regex_mode_int = \c_zero
+ \exp_after:wN \use:n
+ \else:
+ \if_num:w \l_regex_mode_int = \c_three
+ \exp_after:wN \exp_after:wN \exp_after:wN \use:n
+ \else:
+ \msg_kernel_error:nn { regex } { c-bad-mode }
+ \exp_after:wN \exp_after:wN \exp_after:wN \use_none:n
+ \fi:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_mode_quit_c:
+ {
+ \if_num:w \l_regex_mode_int = \c_two
+ \l_regex_mode_int = \c_zero
+ \else:
+ \if_num:w \l_regex_mode_int = \c_six
+ \l_regex_mode_int = \c_three
+ \fi:
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_compile:w
+ {
+ \tl_set_build_x:Nw \l_regex_internal_regex
+ \int_zero:N \l_regex_group_level_int
+ \int_set_eq:NN \l_regex_default_catcodes_int \c_regex_all_catcodes_int
+ \int_set_eq:NN \l_regex_catcodes_int \l_regex_default_catcodes_int
+ \cs_set_nopar:Npn \regex_item_equal:n { \regex_item_caseful_equal:n }
+ \cs_set_nopar:Npn \regex_item_range:nn { \regex_item_caseful_range:nn }
+ \tl_build_one:n { \regex_branch:n { \if_false: } \fi: }
+ }
+\cs_new_protected_nopar:Npn \regex_compile_end:
+ {
+ \regex_if_in_class:TF
+ {
+ \msg_kernel_error:nn { regex } { missing-rbrack }
+ \use:c { regex_compile_]: }
+ \prg_do_nothing: \prg_do_nothing:
+ }
+ { }
+ \if_num:w \l_regex_group_level_int > \c_zero
+ \msg_kernel_error:nnx { regex } { missing-rparen }
+ { \int_use:N \l_regex_group_level_int }
+ \prg_replicate:nn
+ { \l_regex_group_level_int }
+ {
+ \tl_build_one:n
+ {
+ \if_false: { \fi: }
+ \if_false: { \fi: } { 1 } { 0 } \c_true_bool
+ }
+ \tl_build_end:
+ \tl_build_one:o \l_regex_internal_regex
+ }
+ \fi:
+ \tl_build_one:n { \if_false: { \fi: } }
+ \tl_build_end:
+ }
+\cs_new_protected:Npn \regex_compile:n #1
+ {
+ \regex_compile:w
+ \int_set:Nn \tex_escapechar:D { 92 }
+ \int_set_eq:NN \l_regex_mode_int \c_zero
+ \regex_escape_use:nnnn
+ {
+ \regex_char_if_special:NTF ##1
+ \regex_compile_special:N \regex_compile_raw:N ##1
+ }
+ {
+ \regex_char_if_alphanumeric:NTF ##1
+ \regex_compile_escaped:N \regex_compile_raw:N ##1
+ }
+ { \regex_compile_raw:N ##1 }
+ { #1 }
+ \prg_do_nothing: \prg_do_nothing:
+ \prg_do_nothing: \prg_do_nothing:
+ \int_compare:nNnT \l_regex_mode_int < \c_zero
+ {
+ \msg_kernel_error:nn { regex } { c-missing-rbrace }
+ \regex_compile_end:
+ \regex_compile_one:x
+ { \regex_item_cs:n { \exp_not:o \l_regex_internal_regex } }
+ \prg_do_nothing: \prg_do_nothing:
+ \prg_do_nothing: \prg_do_nothing:
+ }
+ \regex_compile_end:
+ }
+\cs_new_protected:Npn \regex_compile_special:N #1
+ {
+ \cs_if_exist_use:cF { regex_compile_#1: }
+ { \regex_compile_raw:N #1 }
+ }
+\cs_new_protected:Npn \regex_compile_escaped:N #1
+ {
+ \cs_if_exist_use:cF { regex_compile_/#1: }
+ { \regex_compile_raw:N #1 }
+ }
+\cs_new_protected:Npn \regex_compile_one:x #1
+ {
+ \regex_mode_quit_c:
+ \regex_if_in_class:TF { }
+ {
+ \tl_build_one:n
+ { \regex_class:NnnnN \c_true_bool { \if_false: } \fi: }
+ }
+ \tl_build_one:x
+ {
+ \if_num:w \l_regex_catcodes_int < \c_regex_all_catcodes_int
+ \regex_item_catcode:nT { \int_use:N \l_regex_catcodes_int }
+ { \exp_not:N \exp_not:n {#1} }
+ \else:
+ \exp_not:N \exp_not:n {#1}
+ \fi:
+ }
+ \int_set_eq:NN \l_regex_catcodes_int \l_regex_default_catcodes_int
+ \regex_if_in_class:TF { } { \regex_compile_quantifier:w }
+ }
+\cs_new_protected:Npn \regex_compile_abort_tokens:n #1
+ {
+ \use:x
+ {
+ \exp_args:No \tl_map_function:nN { \tl_to_str:n {#1} }
+ \regex_compile_raw:N
+ }
+ }
+\cs_generate_variant:Nn \regex_compile_abort_tokens:n { x }
+\cs_new_protected:Npn \regex_compile_quantifier:w #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \regex_compile_special:N
+ {
+ \cs_if_exist_use:cF { regex_compile_quantifier_#2:w }
+ { \regex_compile_quantifier_none: #1 #2 }
+ }
+ { \regex_compile_quantifier_none: #1 #2 }
+ }
+\cs_new_protected:Npn \regex_compile_quantifier_none:
+ { \tl_build_one:n { \if_false: { \fi: } { 1 } { 0 } \c_false_bool } }
+\cs_new_protected:Npn \regex_compile_quantifier_abort:xNN #1#2#3
+ {
+ \regex_compile_quantifier_none:
+ \msg_kernel_warning:nnxx { regex } { invalid-quantifier } {#1} {#3}
+ \regex_compile_abort_tokens:x {#1}
+ #2 #3
+ }
+\cs_new_protected:Npn \regex_compile_quantifier_lazyness:nnNN #1#2#3#4
+ {
+ \str_if_eq:nnTF { #3 #4 } { \regex_compile_special:N ? }
+ { \tl_build_one:n { \if_false: { \fi: } { #1 } { #2 } \c_true_bool } }
+ {
+ \tl_build_one:n { \if_false: { \fi: } { #1 } { #2 } \c_false_bool }
+ #3 #4
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_quantifier_?:w }
+ { \regex_compile_quantifier_lazyness:nnNN { 0 } { 1 } }
+\cs_new_protected_nopar:cpn { regex_compile_quantifier_*:w }
+ { \regex_compile_quantifier_lazyness:nnNN { 0 } { -1 } }
+\cs_new_protected_nopar:cpn { regex_compile_quantifier_+:w }
+ { \regex_compile_quantifier_lazyness:nnNN { 1 } { -1 } }
+\cs_new_protected:cpn { regex_compile_quantifier_ \c_lbrace_str :w }
+ {
+ \regex_get_digits:NTFw \l_regex_internal_a_int
+ { \regex_compile_quantifier_braced_i:w }
+ { \regex_compile_quantifier_abort:xNN { \c_lbrace_str } }
+ }
+\cs_new_protected:Npn \regex_compile_quantifier_braced_i:w #1#2
+ {
+ \prg_case_str:xxn { #1 #2 }
+ {
+ { \regex_compile_special:N \c_rbrace_str }
+ {
+ \exp_args:No \regex_compile_quantifier_lazyness:nnNN
+ { \int_use:N \l_regex_internal_a_int } { 0 }
+ }
+ { \regex_compile_special:N , }
+ {
+ \regex_get_digits:NTFw \l_regex_internal_b_int
+ { \regex_compile_quantifier_braced_iii:w }
+ { \regex_compile_quantifier_braced_ii:w }
+ }
+ }
+ {
+ \regex_compile_quantifier_abort:xNN
+ { \c_lbrace_str \int_use:N \l_regex_internal_a_int }
+ #1 #2
+ }
+ }
+\cs_new_protected:Npn \regex_compile_quantifier_braced_ii:w #1#2
+ {
+ \str_if_eq:xxTF
+ { #1 #2 } { \regex_compile_special:N \c_rbrace_str }
+ {
+ \exp_args:No \regex_compile_quantifier_lazyness:nnNN
+ { \int_use:N \l_regex_internal_a_int } { -1 }
+ }
+ {
+ \regex_compile_quantifier_abort:xNN
+ { \c_lbrace_str \int_use:N \l_regex_internal_a_int , }
+ #1 #2
+ }
+ }
+\cs_new_protected:Npn \regex_compile_quantifier_braced_iii:w #1#2
+ {
+ \str_if_eq:xxTF
+ { #1 #2 } { \regex_compile_special:N \c_rbrace_str }
+ {
+ \if_num:w \l_regex_internal_a_int > \l_regex_internal_b_int
+ \msg_kernel_error:nnxx { regex } { backwards-quantifier }
+ { \int_use:N \l_regex_internal_a_int }
+ { \int_use:N \l_regex_internal_b_int }
+ \int_zero:N \l_regex_internal_b_int
+ \else:
+ \int_sub:Nn \l_regex_internal_b_int \l_regex_internal_a_int
+ \fi:
+ \exp_args:Noo \regex_compile_quantifier_lazyness:nnNN
+ { \int_use:N \l_regex_internal_a_int }
+ { \int_use:N \l_regex_internal_b_int }
+ }
+ {
+ \regex_compile_quantifier_abort:xNN
+ {
+ \c_lbrace_str
+ \int_use:N \l_regex_internal_a_int ,
+ \int_use:N \l_regex_internal_b_int
+ }
+ #1 #2
+ }
+ }
+\cs_new_protected:Npn \regex_compile_raw_error:N #1
+ {
+ \msg_kernel_error:nnx { regex } { bad-escape } {#1}
+ \regex_compile_raw:N #1
+ }
+\cs_new_protected:Npn \regex_compile_raw:N #1#2#3
+ {
+ \regex_if_in_class:TF
+ {
+ \str_if_eq:nnTF {#2#3} { \regex_compile_special:N - }
+ { \regex_compile_range:Nw #1 }
+ {
+ \regex_compile_one:x
+ { \regex_item_equal:n { \int_value:w `#1 ~ } }
+ #2 #3
+ }
+ }
+ {
+ \regex_compile_one:x
+ { \regex_item_equal:n { \int_value:w `#1 ~ } }
+ #2 #3
+ }
+ }
+\prg_new_protected_conditional:Npnn \regex_if_end_range:NN #1#2 { TF }
+ {
+ \if_meaning:w \regex_compile_raw:N #1
+ \prg_return_true:
+ \else:
+ \if_meaning:w \regex_compile_special:N #1
+ \if_charcode:w ] #2
+ \prg_return_false:
+ \else:
+ \prg_return_true:
+ \fi:
+ \else:
+ \prg_return_false:
+ \fi:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_compile_range:Nw #1#2#3
+ {
+ \regex_if_end_range:NNTF #2 #3
+ {
+ \if_num:w `#1 > `#3 \exp_stop_f:
+ \msg_kernel_error:nnxx { regex } { range-backwards } {#1} {#3}
+ \else:
+ \tl_build_one:x
+ {
+ \if_num:w `#1 = `#3 \exp_stop_f:
+ \regex_item_equal:n
+ \else:
+ \regex_item_range:nn { \int_value:w `#1 ~ }
+ \fi:
+ { \int_value:w `#3 ~ }
+ }
+ \fi:
+ }
+ {
+ \msg_kernel_warning:nnxx { regex } { range-missing-end }
+ {#1} { \c_backslash_str #3 }
+ \tl_build_one:x
+ {
+ \regex_item_equal:n { \int_value:w `#1 ~ }
+ \regex_item_equal:n { \int_value:w `- ~ }
+ }
+ #2#3
+ }
+ }
+\cs_new_protected_nopar:cpx { regex_compile_.: }
+ {
+ \exp_not:N \regex_if_in_class:TF
+ { \regex_compile_raw:N . }
+ { \regex_compile_one:x \exp_not:c { regex_prop_.: } }
+ }
+\cs_new_protected_nopar:cpn { regex_prop_.: }
+ {
+ \if_num:w \l_regex_current_char_int > - \c_two
+ \exp_after:wN \regex_break_true:w
+ \fi:
+ }
+\cs_set_protected:Npn \regex_tmp:w #1#2
+ {
+ \cs_new_protected_nopar:cpx { regex_compile_/#1: }
+ { \regex_compile_one:x \exp_not:c { regex_prop_#1: } }
+ \cs_new_protected_nopar:cpx { regex_compile_/#2: }
+ {
+ \regex_compile_one:x
+ { \regex_item_reverse:n \exp_not:c { regex_prop_#1: } }
+ }
+ }
+\regex_tmp:w d D
+\regex_tmp:w h H
+\regex_tmp:w s S
+\regex_tmp:w v V
+\regex_tmp:w w W
+\cs_new_protected_nopar:cpn { regex_compile_/N: }
+ { \regex_compile_one:x \regex_prop_N: }
+\cs_new_protected:Npn \regex_compile_anchor:NF #1#2
+ {
+ \regex_if_in_class_or_catcode:TF {#2}
+ {
+ \tl_build_one:n
+ { \regex_assertion:Nn \c_true_bool { \regex_anchor:N #1 } }
+ }
+ }
+\cs_set_protected:Npn \regex_tmp:w #1#2
+ {
+ \cs_new_protected_nopar:cpn { regex_compile_/#1: }
+ { \regex_compile_anchor:NF #2 { \regex_compile_raw_error:N #1 } }
+ }
+\regex_tmp:w A \l_regex_min_pos_int
+\regex_tmp:w G \l_regex_start_pos_int
+\regex_tmp:w Z \l_regex_max_pos_int
+\regex_tmp:w z \l_regex_max_pos_int
+\cs_set_protected:Npn \regex_tmp:w #1#2
+ {
+ \cs_new_protected_nopar:cpn { regex_compile_#1: }
+ { \regex_compile_anchor:NF #2 { \regex_compile_raw:N #1 } }
+ }
+\exp_args:Nx \regex_tmp:w { \iow_char:N \^ } \l_regex_min_pos_int
+\exp_args:Nx \regex_tmp:w { \iow_char:N \$ } \l_regex_max_pos_int
+\cs_new_protected_nopar:cpn { regex_compile_/b: }
+ {
+ \regex_if_in_class_or_catcode:TF
+ { \regex_compile_raw_error:N b }
+ {
+ \tl_build_one:n
+ { \regex_assertion:Nn \c_true_bool { \regex_b_test: } }
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_/B: }
+ {
+ \regex_if_in_class_or_catcode:TF
+ { \regex_compile_raw_error:N B }
+ {
+ \tl_build_one:n
+ { \regex_assertion:Nn \c_false_bool { \regex_b_test: } }
+ }
+ }
+\cs_new_protected:cpn { regex_compile_]: }
+ {
+ \regex_if_in_class:TF
+ {
+ \if_num:w \l_regex_mode_int > \c_sixteen
+ \tl_build_one:n { \if_false: { \fi: } }
+ \fi:
+ \tex_advance:D \l_regex_mode_int - \c_fifteen
+ \tex_divide:D \l_regex_mode_int \c_thirteen
+ \if_int_odd:w \l_regex_mode_int \else:
+ \exp_after:wN \regex_compile_quantifier:w
+ \fi:
+ }
+ { \regex_compile_raw:N ] }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_[: }
+ {
+ \regex_if_in_class:TF
+ { \regex_compile_class_posix_test:w }
+ {
+ \regex_if_within_catcode:TF
+ {
+ \exp_after:wN \regex_compile_class_catcode:w
+ \int_use:N \l_regex_catcodes_int ;
+ }
+ { \regex_compile_class_normal:w }
+ }
+ }
+\cs_new_protected_nopar:Npn \regex_compile_class_normal:w
+ {
+ \regex_compile_class:TFNN
+ { \regex_class:NnnnN \c_true_bool }
+ { \regex_class:NnnnN \c_false_bool }
+ }
+\cs_new_protected:Npn \regex_compile_class_catcode:w #1;
+ {
+ \if_int_compare:w \l_regex_mode_int = \c_two
+ \tl_build_one:n
+ { \regex_class:NnnnN \c_true_bool { \if_false: } \fi: }
+ \fi:
+ \int_set_eq:NN \l_regex_catcodes_int \l_regex_default_catcodes_int
+ \regex_compile_class:TFNN
+ { \regex_item_catcode:nT {#1} }
+ { \regex_item_catcode_reverse:nT {#1} }
+ }
+\cs_new_protected:Npn \regex_compile_class:TFNN #1#2#3#4
+ {
+ \l_regex_mode_int = \int_value:w \l_regex_mode_int 3 \exp_stop_f:
+ \str_if_eq:nnTF { #3 #4 } { \regex_compile_special:N ^ }
+ {
+ \tl_build_one:n { #2 { \if_false: } \fi: }
+ \regex_compile_class_ii:NN
+ }
+ {
+ \tl_build_one:n { #1 { \if_false: } \fi: }
+ \regex_compile_class_ii:NN #3 #4
+ }
+ }
+\cs_new_protected:Npn \regex_compile_class_ii:NN #1#2
+ {
+ \token_if_eq_charcode:NNTF #2 ]
+ { \regex_compile_raw:N #2 }
+ { #1 #2 }
+ }
+\cs_new_protected:Npn \regex_compile_class_posix_test:w #1#2
+ {
+ \token_if_eq_meaning:NNT \regex_compile_special:N #1
+ {
+ \prg_case_str:nnn { #2 }
+ {
+ : { \regex_compile_class_posix:NNNNw }
+ = { \msg_kernel_warning:nnx { regex } { posix-unsupported } { = } }
+ . { \msg_kernel_warning:nnx { regex } { posix-unsupported } { . } }
+ }
+ { }
+ }
+ \regex_compile_raw:N [ #1 #2
+ }
+\cs_new_protected:Npn \regex_compile_class_posix:NNNNw #1#2#3#4#5#6
+ {
+ \str_if_eq:nnTF { #5 #6 } { \regex_compile_special:N ^ }
+ {
+ \bool_set_false:N \l_regex_internal_bool
+ \tl_set:Nx \l_regex_internal_a_tl { \if_false: } \fi:
+ \regex_compile_class_posix_loop:w
+ }
+ {
+ \bool_set_true:N \l_regex_internal_bool
+ \tl_set:Nx \l_regex_internal_a_tl { \if_false: } \fi:
+ \regex_compile_class_posix_loop:w #5 #6
+ }
+ }
+\cs_new:Npn \regex_compile_class_posix_loop:w #1#2
+ {
+ \token_if_eq_meaning:NNTF \regex_compile_raw:N #1
+ { #2 \regex_compile_class_posix_loop:w }
+ { \if_false: { \fi: } \regex_compile_class_posix_end:w #1 #2 }
+ }
+\cs_new_protected:Npn \regex_compile_class_posix_end:w #1#2#3#4
+ {
+ \str_if_eq:nnTF { #1 #2 #3 #4 }
+ { \regex_compile_special:N : \regex_compile_special:N ] }
+ {
+ \cs_if_exist:cTF { regex_posix_ \l_regex_internal_a_tl : }
+ {
+ \regex_compile_one:x
+ {
+ \bool_if:NF \l_regex_internal_bool \regex_item_reverse:n
+ \exp_not:c { regex_posix_ \l_regex_internal_a_tl : }
+ }
+ }
+ {
+ \msg_kernel_warning:nnx { regex } { posix-unknown }
+ { \l_regex_internal_a_tl }
+ \regex_compile_abort_tokens:x
+ {
+ [: \bool_if:NF \l_regex_internal_bool { ^ }
+ \l_regex_internal_a_tl :]
+ }
+ }
+ }
+ {
+ \msg_kernel_error:nnxx { regex } { posix-missing-close }
+ { [: \l_regex_internal_a_tl } { #2 #4 }
+ \regex_compile_abort_tokens:x { [: \l_regex_internal_a_tl }
+ #1 #2 #3 #4
+ }
+ }
+\cs_new_protected:Npn \regex_compile_group_begin:N #1
+ {
+ \tl_build_one:n { #1 { \if_false: } \fi: }
+ \regex_mode_quit_c:
+ \tl_set_build:Nw \l_regex_internal_regex
+ \int_set_eq:NN \l_regex_default_catcodes_int \l_regex_catcodes_int
+ \int_incr:N \l_regex_group_level_int
+ \tl_build_one:n { \regex_branch:n { \if_false: } \fi: }
+ }
+\cs_new_protected:Npn \regex_compile_group_end:
+ {
+ \if_num:w \l_regex_group_level_int > \c_zero
+ \tl_build_one:n { \if_false: { \fi: } }
+ \tl_build_end:
+ \int_set_eq:NN \l_regex_catcodes_int \l_regex_default_catcodes_int
+ \tl_build_one:o \l_regex_internal_regex
+ \exp_after:wN \regex_compile_quantifier:w
+ \else:
+ \msg_kernel_warning:nn { regex } { extra-rparen }
+ \exp_after:wN \regex_compile_raw:N \exp_after:wN )
+ \fi:
+ }
+\cs_new_protected_nopar:cpn { regex_compile_(: }
+ {
+ \regex_if_in_class:TF { \regex_compile_raw:N ( }
+ { \regex_compile_lparen:w }
+ }
+\cs_new_protected:Npn \regex_compile_lparen:w #1#2#3#4
+ {
+ \str_if_eq:nnTF { #1 #2 } { \regex_compile_special:N ? }
+ {
+ \cs_if_exist_use:cF
+ { regex_compile_special_group_\token_to_str:N #4 :w }
+ {
+ \msg_kernel_warning:nnx { regex } { special-group-unknown }
+ { (? \token_to_str:N #4 }
+ \regex_compile_group_begin:N \regex_group:nnnN
+ \regex_compile_raw:N ? #3 #4
+ }
+ }
+ {
+ \regex_compile_group_begin:N \regex_group:nnnN
+ #1 #2 #3 #4
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_|: }
+ {
+ \regex_if_in_class:TF { \regex_compile_raw:N | }
+ {
+ \tl_build_one:n
+ { \if_false: { \fi: } \regex_branch:n { \if_false: } \fi: }
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_): }
+ {
+ \regex_if_in_class:TF { \regex_compile_raw:N ) }
+ { \regex_compile_group_end: }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_special_group_::w }
+ { \regex_compile_group_begin:N \regex_group_no_capture:nnnN }
+\cs_new_protected_nopar:cpn { regex_compile_special_group_|:w }
+ { \regex_compile_group_begin:N \regex_group_resetting:nnnN }
+\cs_new_protected:Npn \regex_compile_special_group_i:w #1#2
+ {
+ \str_if_eq:nnTF { #1 #2 } { \regex_compile_special:N ) }
+ {
+ \cs_set_nopar:Npn \regex_item_equal:n { \regex_item_caseless_equal:n }
+ \cs_set_nopar:Npn \regex_item_range:nn { \regex_item_caseless_range:nn }
+ }
+ {
+ \msg_kernel_warning:nnx { regex } { unknown-option } { (?i #2 }
+ \regex_compile_raw:N (
+ \regex_compile_raw:N ?
+ \regex_compile_raw:N i
+ #1 #2
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_special_group_-:w } #1#2#3#4
+ {
+ \str_if_eq:nnTF { #1 #2 #3 #4 }
+ { \regex_compile_raw:N i \regex_compile_special:N ) }
+ {
+ \cs_set_nopar:Npn \regex_item_equal:n { \regex_item_caseful_equal:n }
+ \cs_set_nopar:Npn \regex_item_range:nn { \regex_item_caseful_range:nn }
+ }
+ {
+ \msg_kernel_warning:nnx { regex } { unknown-option } { (?-#2#4 }
+ \regex_compile_raw:N (
+ \regex_compile_raw:N ?
+ \regex_compile_raw:N -
+ #1 #2 #3 #4
+ }
+ }
+\cs_new_protected:cpn { regex_compile_/c: }
+ { \regex_chk_c_allowed:T { \regex_compile_c_test:NN } }
+\cs_new_protected:Npn \regex_compile_c_test:NN #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \regex_compile_raw:N
+ {
+ \cs_if_exist:cTF { c_regex_catcode_#2_int }
+ {
+ \int_set_eq:Nc \l_regex_catcodes_int { c_regex_catcode_#2_int }
+ \l_regex_mode_int
+ = \if_case:w \l_regex_mode_int \c_two \else: \c_six \fi:
+ }
+ }
+ { \cs_if_exist_use:cF { regex_compile_c_#2:w } }
+ {
+ \msg_kernel_error:nnx { regex } { c-missing-category } {#2}
+ #1 #2
+ }
+ }
+\cs_new_protected:cpn { regex_compile_c_[:w } #1#2
+ {
+ \l_regex_mode_int
+ = \if_case:w \l_regex_mode_int \c_two \else: \c_six \fi:
+ \int_zero:N \l_regex_catcodes_int
+ \str_if_eq:nnTF { #1 #2 } { \regex_compile_special:N ^ }
+ {
+ \bool_set_false:N \l_regex_catcodes_bool
+ \regex_compile_c_lbrack_loop:NN
+ }
+ {
+ \bool_set_true:N \l_regex_catcodes_bool
+ \regex_compile_c_lbrack_loop:NN
+ #1 #2
+ }
+ }
+\cs_new_protected:Npn \regex_compile_c_lbrack_loop:NN #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \regex_compile_raw:N
+ {
+ \cs_if_exist:cTF { c_regex_catcode_#2_int }
+ {
+ \exp_args:Nc \regex_compile_c_lbrack_add:N
+ { c_regex_catcode_#2_int }
+ \regex_compile_c_lbrack_loop:NN
+ }
+ }
+ {
+ \token_if_eq_charcode:NNTF #2 ]
+ { \regex_compile_c_lbrack_end: }
+ }
+ {
+ \msg_kernel_error:nnx { regex } { c-missing-rbrack } {#2}
+ \regex_compile_c_lbrack_end:
+ #1 #2
+ }
+ }
+\cs_new_protected:Npn \regex_compile_c_lbrack_add:N #1
+ {
+ \if_int_odd:w \int_eval:w \l_regex_catcodes_int / #1 \int_eval_end:
+ \else:
+ \tex_advance:D \l_regex_catcodes_int #1
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_compile_c_lbrack_end:
+ {
+ \if_meaning:w \c_false_bool \l_regex_catcodes_bool
+ \int_set:Nn \l_regex_catcodes_int
+ { \c_regex_all_catcodes_int - \l_regex_catcodes_int }
+ \fi:
+ }
+\cs_new_protected_nopar:cpn { regex_compile_c_ \c_lbrace_str :w }
+ {
+ \regex_compile:w
+ \regex_disable_submatches:
+ \l_regex_mode_int
+ = - \if_case:w \l_regex_mode_int \c_two \else: \c_six \fi:
+ }
+\cs_new_protected:cpn { regex_compile_ \c_rbrace_str : }
+ {
+ \regex_if_in_cs:TF
+ {
+ \regex_compile_end:
+ \regex_compile_one:x
+ { \regex_item_cs:n { \exp_not:o \l_regex_internal_regex } }
+ }
+ { \exp_after:wN \regex_compile_raw:N \c_rbrace_str }
+ }
+\cs_new_protected:cpn { regex_compile_/u: } #1#2
+ {
+ \regex_if_in_class_or_catcode:TF
+ { \regex_compile_raw_error:N u #1 #2 }
+ {
+ \str_if_eq:xxTF {#1#2} { \regex_compile_special:N \c_lbrace_str }
+ {
+ \tl_set:Nx \l_regex_internal_a_tl { \if_false: } \fi:
+ \regex_compile_u_loop:NN
+ }
+ {
+ \msg_kernel_error:nn { regex } { u-missing-lbrace }
+ \regex_compile_raw:N u #1 #2
+ }
+ }
+ }
+\cs_new:Npn \regex_compile_u_loop:NN #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \regex_compile_raw:N
+ { #2 \regex_compile_u_loop:NN }
+ {
+ \token_if_eq_meaning:NNTF #1 \regex_compile_special:N
+ {
+ \exp_after:wN \token_if_eq_charcode:NNTF \c_rbrace_str #2
+ { \if_false: { \fi: } \regex_compile_u_end: }
+ { #2 \regex_compile_u_loop:NN }
+ }
+ {
+ \if_false: { \fi: }
+ \msg_kernel_error:nnx { regex } { u-missing-rbrace } {#2}
+ \regex_compile_u_end:
+ #1 #2
+ }
+ }
+ }
+\cs_new_protected:Npn \regex_compile_u_end:
+ {
+ \tl_set:Nv \l_regex_internal_a_tl { \l_regex_internal_a_tl }
+ \if_num:w \l_regex_mode_int = \c_zero
+ \regex_compile_u_not_cs:
+ \else:
+ \regex_compile_u_in_cs:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_compile_u_in_cs:
+ {
+ \exp_args:NNo \str_gset_other:Nn \g_regex_internal_tl
+ { \l_regex_internal_a_tl }
+ \tl_build_one:x
+ {
+ \tl_map_function:NN \g_regex_internal_tl
+ \regex_compile_u_in_cs_aux:n
+ }
+ }
+\cs_new:Npn \regex_compile_u_in_cs_aux:n #1
+ {
+ \regex_class:NnnnN \c_true_bool
+ { \regex_item_caseful_equal:n { \int_value:w `#1 } }
+ { 1 } { 0 } \c_false_bool
+ }
+\cs_new_protected:Npn \regex_compile_u_not_cs:
+ {
+ \exp_args:No \tl_analysis_map_inline:nn { \l_regex_internal_a_tl }
+ {
+ \tl_build_one:n
+ {
+ \regex_class:NnnnN \c_true_bool
+ {
+ \if_num:w "##2 = \c_zero
+ \regex_item_exact_cs:c { \exp_after:wN \cs_to_str:N ##1 }
+ \else:
+ \regex_item_exact:nn { \int_value:w "##2 } { ##3 }
+ \fi:
+ }
+ { 1 } { 0 } \c_false_bool
+ }
+ }
+ }
+\cs_new_protected_nopar:cpn { regex_compile_/K: }
+ {
+ \int_compare:nNnTF \l_regex_mode_int = \c_zero
+ { \tl_build_one:n { \regex_command_K: } }
+ { \regex_compile_raw_error:N K }
+ }
+\cs_new_protected:Npn \regex_show_aux:Nx #1#2
+ {
+ \tl_set_build:Nw \l_regex_internal_a_tl
+ \cs_set_protected_nopar:Npn \regex_branch:n
+ {
+ \seq_pop_right:NN \l_regex_show_prefix_seq \l_regex_internal_a_tl
+ \regex_show_one:n { +-branch }
+ \seq_put_right:No \l_regex_show_prefix_seq \l_regex_internal_a_tl
+ \use:n
+ }
+ \cs_set_protected_nopar:Npn \regex_group:nnnN
+ { \regex_show_group_aux:nnnnN { } }
+ \cs_set_protected_nopar:Npn \regex_group_no_capture:nnnN
+ { \regex_show_group_aux:nnnnN { ~(no~capture) } }
+ \cs_set_protected_nopar:Npn \regex_group_resetting:nnnN
+ { \regex_show_group_aux:nnnnN { ~(resetting) } }
+ \cs_set_eq:NN \regex_class:NnnnN \regex_show_class:NnnnN
+ \cs_set_protected_nopar:Npn \regex_command_K:
+ { \regex_show_one:n { reset~match~start~(\iow_char:N\\K) } }
+ \cs_set_protected:Npn \regex_assertion:Nn ##1##2
+ { \regex_show_one:n { \bool_if:NF ##1 { negative~ } assertion:~##2 } }
+ \cs_set_nopar:Npn \regex_b_test: { word~boundary }
+ \cs_set_eq:NN \regex_anchor:N \regex_show_anchor_to_str:N
+ \cs_set_protected:Npn \regex_item_caseful_equal:n ##1
+ { \regex_show_one:n { char~code~\int_eval:n{##1} } }
+ \cs_set_protected:Npn \regex_item_caseful_range:nn ##1##2
+ { \regex_show_one:n { range~[\int_eval:n{##1}, \int_eval:n{##2}] } }
+ \cs_set_protected:Npn \regex_item_caseless_equal:n ##1
+ { \regex_show_one:n { char~code~\int_eval:n{##1}~(caseless) } }
+ \cs_set_protected:Npn \regex_item_caseless_range:nn ##1##2
+ {
+ \regex_show_one:n
+ { Range~[\int_eval:n{##1}, \int_eval:n{##2}]~(caseless) }
+ }
+ \cs_set_protected:Npn \regex_item_catcode:nT
+ { \regex_show_item_catcode:NnT \c_true_bool }
+ \cs_set_protected:Npn \regex_item_catcode_reverse:nT
+ { \regex_show_item_catcode:NnT \c_false_bool }
+ \cs_set_protected:Npn \regex_item_reverse:n
+ { \regex_show_scope:nn { Reversed~match } }
+ \cs_set_protected:Npn \regex_item_exact:nn ##1##2
+ { \regex_show_one:n { char~##2,~catcode~##1 } }
+ \cs_set_protected:Npn \regex_item_exact_cs:c ##1
+ { \regex_show_one:n { control~sequence~\iow_char:N\\##1 } }
+ \cs_set_protected:Npn \regex_item_cs:n
+ { \regex_show_scope:nn { control~sequence } }
+ \cs_set:cpn { regex_prop_.: } { \regex_show_one:n { any~token } }
+ \seq_clear:N \l_regex_show_prefix_seq
+ \regex_show_push:n { ~ }
+ #1
+ \tl_build_end:
+ \msg_aux_show:x { > Compiled~regex~#2: \l_regex_internal_a_tl }
+ }
+\cs_new_protected:Npn \regex_show_one:n #1
+ {
+ \int_incr:N \l_regex_show_lines_int
+ \tl_build_one:x
+ { \iow_newline: \seq_use:N \l_regex_show_prefix_seq #1 }
+ }
+\cs_new_protected:Npn \regex_show_push:n #1
+ { \seq_put_right:Nx \l_regex_show_prefix_seq { #1 ~ } }
+\cs_new_protected:Npn \regex_show_pop:
+ { \seq_pop_right:NN \l_regex_show_prefix_seq \l_regex_internal_a_tl }
+\cs_new_protected:Npn \regex_show_scope:nn #1#2
+ {
+ \regex_show_one:n {#1}
+ \regex_show_push:n { ~ }
+ #2
+ \regex_show_pop:
+ }
+\cs_new_protected:Npn \regex_show_group_aux:nnnnN #1#2#3#4#5
+ {
+ \regex_show_one:n { ,-group~begin #1 }
+ \regex_show_push:n { | }
+ \use_ii:nn #2
+ \regex_show_pop:
+ \regex_show_one:n
+ { `-group~end \regex_msg_repeated:nnN {#3} {#4} #5 }
+ }
+\cs_set:Npn \regex_show_class:NnnnN #1#2#3#4#5
+ {
+ \tl_set_build:Nw \l_regex_internal_a_tl
+ \int_zero:N \l_regex_show_lines_int
+ \regex_show_push:n {~}
+ #2
+ \exp_last_unbraced:Nf
+ \prg_case_int:nnn { \l_regex_show_lines_int }
+ {
+ {0}
+ {
+ \tl_build_end:
+ \regex_show_one:n { \bool_if:NTF #1 { Fail } { Pass } }
+ }
+ {1}
+ {
+ \tl_build_end:
+ \bool_if:NTF #1
+ {
+ #2
+ \tl_build_one:n { \regex_msg_repeated:nnN {#3} {#4} #5 }
+ }
+ {
+ \regex_show_one:n
+ { Don't~match~\regex_msg_repeated:nnN {#3} {#4} #5 }
+ \tl_build_one:o \l_regex_internal_a_tl
+ }
+ }
+ }
+ {
+ \tl_build_end:
+ \regex_show_one:n
+ {
+ \bool_if:NTF #1 { M } { Don't~m } atch
+ \regex_msg_repeated:nnN {#3} {#4} #5
+ }
+ \tl_build_one:o \l_regex_internal_a_tl
+ }
+ }
+\cs_new:Npn \regex_show_anchor_to_str:N #1
+ {
+ anchor~at~
+ \prg_case_str:nnn { #1 }
+ {
+ { \l_regex_min_pos_int } { start~(\iow_char:N\\A) }
+ { \l_regex_start_pos_int } { start~of~match~(\iow_char:N\\G) }
+ { \l_regex_max_pos_int } { end~(\iow_char:N\\Z) }
+ }
+ { <error:~'#1'~not~recognized> }
+ }
+\cs_new_protected:Npn \regex_show_item_catcode:NnT #1#2
+ {
+ \seq_set_split:Nnn \l_regex_internal_seq { } { CBEMTPUDSLOA }
+ \seq_set_filter:NNn \l_regex_internal_seq \l_regex_internal_seq
+ { \int_if_odd_p:n { #2 / \int_use:c { c_regex_catcode_##1_int } } }
+ \regex_show_scope:nn
+ {
+ categories~\seq_use:N \l_regex_internal_seq, ~
+ \bool_if:NF #1 { negative~ } class
+ }
+ }
+\int_new:N \l_regex_min_state_int
+\int_new:N \l_regex_max_state_int
+\int_new:N \l_regex_left_state_int
+\int_new:N \l_regex_right_state_int
+\seq_new:N \l_regex_left_state_seq
+\seq_new:N \l_regex_right_state_seq
+\int_new:N \l_regex_capturing_group_int
+\cs_new_protected:Npn \regex_build:n #1
+ {
+ \regex_compile:n {#1}
+ \regex_build:N \l_regex_internal_regex
+ }
+\cs_new_protected:Npn \regex_build:N #1
+ {
+ \trace_push:nnn { regex } { 1 } { regex_build }
+ \int_set:Nn \tex_escapechar:D { 92 }
+ \int_zero:N \l_regex_capturing_group_int
+ \int_set_eq:NN \l_regex_max_state_int \l_regex_min_state_int
+ \regex_build_new_state:
+ \regex_build_new_state:
+ \regex_toks_put_right:Nn \l_regex_left_state_int
+ { \regex_action_start_wildcard: }
+ \regex_group:nnnN {#1} { 1 } { 0 } \c_false_bool
+ \regex_toks_put_right:Nn \l_regex_right_state_int
+ { \regex_action_success: }
+ \regex_trace_states:n { 2 }
+ \trace_pop:nnn { regex } { 1 } { regex_build }
+ }
+\cs_new_protected:Npn \regex_build_for_cs:n #1
+ {
+ \trace_push:nnn { regex } { 1 } { regex_build_for_cs }
+ \int_set_eq:NN \l_regex_max_state_int \l_regex_min_state_int
+ \regex_build_new_state:
+ \regex_build_new_state:
+ \regex_push_lr_states:
+ #1
+ \regex_pop_lr_states:
+ \regex_toks_put_right:Nn \l_regex_right_state_int
+ {
+ \if_num:w \l_regex_current_pos_int = \l_regex_max_pos_int
+ \exp_after:wN \regex_action_success:
+ \fi:
+ }
+ \regex_trace_states:n { 2 }
+ \trace_pop:nnn { regex } { 1 } { regex_build_for_cs }
+ }
+\cs_new_protected_nopar:Npn \regex_push_lr_states:
+ {
+ \seq_push:No \l_regex_left_state_seq
+ { \int_use:N \l_regex_left_state_int }
+ \seq_push:No \l_regex_right_state_seq
+ { \int_use:N \l_regex_right_state_int }
+ }
+\cs_new_protected_nopar:Npn \regex_pop_lr_states:
+ {
+ \seq_pop:NN \l_regex_left_state_seq \l_regex_internal_a_tl
+ \int_set:Nn \l_regex_left_state_int \l_regex_internal_a_tl
+ \seq_pop:NN \l_regex_right_state_seq \l_regex_internal_a_tl
+ \int_set:Nn \l_regex_right_state_int \l_regex_internal_a_tl
+ }
+\cs_new_protected:Npn \regex_toks_put_left:Nx #1#2
+ {
+ \cs_set_nopar:Npx \regex_tmp:w { #2 }
+ \tex_toks:D #1 \exp_after:wN \exp_after:wN \exp_after:wN
+ { \exp_after:wN \regex_tmp:w \tex_the:D \tex_toks:D #1 }
+ }
+\cs_new_protected:Npn \regex_toks_put_right:Nx #1#2
+ {
+ \cs_set_nopar:Npx \regex_tmp:w {#2}
+ \tex_toks:D #1 \exp_after:wN
+ { \tex_the:D \tex_toks:D \exp_after:wN #1 \regex_tmp:w }
+ }
+\cs_new_protected:Npn \regex_toks_put_right:Nn #1#2
+ { \tex_toks:D #1 \exp_after:wN { \tex_the:D \tex_toks:D #1 #2 } }
+\cs_new_protected:Npn \regex_build_transition_left:NNN #1#2#3
+ { \regex_toks_put_left:Nx #2 { #1 { \int_eval:n { #3 - #2 } } } }
+\cs_new_protected:Npn \regex_build_transition_right:nNn #1#2#3
+ { \regex_toks_put_right:Nx #2 { #1 { \int_eval:n { #3 - #2 } } } }
+\cs_new_protected_nopar:Npn \regex_build_new_state:
+ {
+ \trace:nnx { regex } { 2 }
+ {
+ regex~new~state~
+ L=\int_use:N \l_regex_left_state_int ~ -> ~
+ R=\int_use:N \l_regex_right_state_int ~ -> ~
+ M=\int_use:N \l_regex_max_state_int ~ -> ~
+ \int_eval:n { \l_regex_max_state_int + \c_one }
+ }
+ \tex_toks:D \l_regex_max_state_int { }
+ \int_set_eq:NN \l_regex_left_state_int \l_regex_right_state_int
+ \int_set_eq:NN \l_regex_right_state_int \l_regex_max_state_int
+ \int_incr:N \l_regex_max_state_int
+ }
+\cs_new_protected:Npn \regex_build_transitions_lazyness:NNNNN #1#2#3#4#5
+ {
+ \regex_build_new_state:
+ \regex_toks_put_right:Nx \l_regex_left_state_int
+ {
+ \if_meaning:w \c_true_bool #1
+ #2 { \int_eval:n { #3 - \l_regex_left_state_int } }
+ #4 { \int_eval:n { #5 - \l_regex_left_state_int } }
+ \else:
+ #4 { \int_eval:n { #5 - \l_regex_left_state_int } }
+ #2 { \int_eval:n { #3 - \l_regex_left_state_int } }
+ \fi:
+ }
+ }
+\cs_new_protected:Npn \regex_class:NnnnN #1#2#3#4#5
+ {
+ \cs_set_nopar:Npx \regex_tests_action_cost:n ##1
+ {
+ \exp_not:n { \exp_not:n {#2} }
+ \bool_if:NTF #1
+ { \regex_break_point:TF { \regex_action_cost:n {##1} } { } }
+ { \regex_break_point:TF { } { \regex_action_cost:n {##1} } }
+ }
+ \if_case:w - #4 \exp_stop_f:
+ \regex_class_repeat:n {#3}
+ \or: \regex_class_repeat:nN {#3} #5
+ \else: \regex_class_repeat:nnN {#3} {#4} #5
+ \fi:
+ }
+\cs_new:Npn \regex_tests_action_cost:n { \regex_action_cost:n }
+\cs_new_protected:Npn \regex_class_repeat:n #1
+ {
+ \prg_replicate:nn {#1}
+ {
+ \regex_build_new_state:
+ \regex_build_transition_right:nNn \regex_tests_action_cost:n
+ \l_regex_left_state_int \l_regex_right_state_int
+ }
+ }
+\cs_new_protected:Npn \regex_class_repeat:nN #1#2
+ {
+ \if_num:w #1 = \c_zero
+ \regex_build_transitions_lazyness:NNNNN #2
+ \regex_action_free:n \l_regex_right_state_int
+ \regex_tests_action_cost:n \l_regex_left_state_int
+ \else:
+ \regex_class_repeat:n {#1}
+ \int_set_eq:NN \l_regex_internal_a_int \l_regex_left_state_int
+ \regex_build_transitions_lazyness:NNNNN #2
+ \regex_action_free:n \l_regex_right_state_int
+ \regex_action_free:n \l_regex_internal_a_int
+ \fi:
+ }
+\cs_new_protected:Npn \regex_class_repeat:nnN #1#2#3
+ {
+ \regex_class_repeat:n {#1}
+ \int_set:Nn \l_regex_internal_a_int
+ { \l_regex_max_state_int + #2 - \c_one }
+ \prg_replicate:nn { #2 }
+ {
+ \regex_build_transitions_lazyness:NNNNN #3
+ \regex_action_free:n \l_regex_internal_a_int
+ \regex_tests_action_cost:n \l_regex_right_state_int
+ }
+ }
+\cs_new_protected:Npn \regex_group_aux:nnnnN #1#2#3#4#5
+ {
+ \trace_push:nnn { regex } { 1 } { regex_group }
+ \if_num:w #3 = \c_zero
+ \regex_build_new_state:
+ \regex_build_transition_right:nNn \regex_action_free_group:n
+ \l_regex_left_state_int \l_regex_right_state_int
+ \fi:
+ \regex_build_new_state:
+ \regex_push_lr_states:
+ #2
+ \regex_pop_lr_states:
+ \if_case:w - #4 \exp_stop_f:
+ \regex_group_repeat:nn {#1} {#3}
+ \or: \regex_group_repeat:nnN {#1} {#3} #5
+ \else: \regex_group_repeat:nnnN {#1} {#3} {#4} #5
+ \fi:
+ \trace_pop:nnn { regex } { 1 } { regex_group }
+ }
+\cs_new_protected:Npn \regex_group:nnnN #1
+ {
+ \exp_args:No \regex_group_aux:nnnnN
+ { \int_use:N \l_regex_capturing_group_int }
+ {
+ \int_incr:N \l_regex_capturing_group_int
+ #1
+ }
+ }
+\cs_new_protected_nopar:Npn \regex_group_no_capture:nnnN
+ { \regex_group_aux:nnnnN { -1 } }
+\cs_new_protected:Npn \regex_group_resetting:nnnN #1
+ {
+ \regex_group_aux:nnnnN { -1 }
+ {
+ \exp_args:Noo \regex_group_resetting_loop:nnNn
+ { \int_use:N \l_regex_capturing_group_int }
+ { \int_use:N \l_regex_capturing_group_int }
+ #1
+ { ?? \prg_map_break:n } { }
+ \prg_break_point:n { }
+ }
+ }
+\cs_new_protected:Npn \regex_group_resetting_loop:nnNn #1#2#3#4
+ {
+ \use_none:nn #3 { \int_set:Nn \l_regex_capturing_group_int {#1} }
+ \int_set:Nn \l_regex_capturing_group_int {#2}
+ #3 {#4}
+ \exp_args:Nf \regex_group_resetting_loop:nnNn
+ { \int_max:nn {#1} { \l_regex_capturing_group_int } }
+ {#2}
+ }
+\cs_new_protected:Npn \regex_branch:n #1
+ {
+ \trace_push:nnn { regex } { 1 } { regex_branch }
+ \regex_build_new_state:
+ \seq_get:NN \l_regex_left_state_seq \l_regex_internal_a_tl
+ \int_set:Nn \l_regex_left_state_int \l_regex_internal_a_tl
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_left_state_int \l_regex_right_state_int
+ #1
+ \seq_get:NN \l_regex_right_state_seq \l_regex_internal_a_tl
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_right_state_int \l_regex_internal_a_tl
+ \trace_pop:nnn { regex } { 1 } { regex_branch }
+ }
+\cs_new_protected:Npn \regex_group_repeat:nn #1#2
+ {
+ \if_num:w #2 = \c_zero
+ \int_set:Nn \l_regex_max_state_int
+ { \l_regex_left_state_int - \c_one }
+ \regex_build_new_state:
+ \else:
+ \regex_group_repeat_aux:n {#2}
+ \regex_group_submatches:nNN {#1}
+ \l_regex_internal_a_int \l_regex_right_state_int
+ \regex_build_new_state:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_group_submatches:nNN #1#2#3
+ {
+ \if_num:w #1 > \c_minus_one
+ \regex_toks_put_left:Nx #2 { \regex_action_submatch:n { #1 < } }
+ \regex_toks_put_left:Nx #3 { \regex_action_submatch:n { #1 > } }
+ \fi:
+ }
+\cs_new_protected:Npn \regex_group_repeat_aux:n #1
+ {
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_right_state_int \l_regex_max_state_int
+ \int_set_eq:NN \l_regex_internal_a_int \l_regex_left_state_int
+ \int_set_eq:NN \l_regex_internal_b_int \l_regex_max_state_int
+ \if_num:w \int_eval:w #1 > \c_one
+ \int_set:Nn \l_regex_internal_c_int
+ {
+ ( #1 - \c_one )
+ * ( \l_regex_internal_b_int - \l_regex_internal_a_int )
+ }
+ \tex_advance:D \l_regex_right_state_int \l_regex_internal_c_int
+ \tex_advance:D \l_regex_max_state_int \l_regex_internal_c_int
+ \prg_replicate:nn \l_regex_internal_c_int
+ {
+ \tex_toks:D \l_regex_internal_b_int
+ = \tex_toks:D \l_regex_internal_a_int
+ \tex_advance:D \l_regex_internal_a_int \c_one
+ \tex_advance:D \l_regex_internal_b_int \c_one
+ }
+ \fi:
+ }
+\cs_new_protected:Npn \regex_group_repeat:nnN #1#2#3
+ {
+ \if_num:w #2 = \c_zero
+ \regex_group_submatches:nNN {#1}
+ \l_regex_left_state_int \l_regex_right_state_int
+ \int_set:Nn \l_regex_internal_a_int
+ { \l_regex_left_state_int - \c_one }
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_right_state_int \l_regex_internal_a_int
+ \regex_build_new_state:
+ \if_meaning:w \c_true_bool #3
+ \regex_build_transition_left:NNN \regex_action_free:n
+ \l_regex_internal_a_int \l_regex_right_state_int
+ \else:
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_internal_a_int \l_regex_right_state_int
+ \fi:
+ \else:
+ \regex_group_repeat_aux:n {#2}
+ \regex_group_submatches:nNN {#1}
+ \l_regex_internal_a_int \l_regex_right_state_int
+ \if_meaning:w \c_true_bool #3
+ \regex_build_transition_right:nNn \regex_action_free_group:n
+ \l_regex_right_state_int \l_regex_internal_a_int
+ \else:
+ \regex_build_transition_left:NNN \regex_action_free_group:n
+ \l_regex_right_state_int \l_regex_internal_a_int
+ \fi:
+ \regex_build_new_state:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_group_repeat:nnnN #1#2#3#4
+ {
+ \regex_group_submatches:nNN {#1}
+ \l_regex_left_state_int \l_regex_right_state_int
+ \regex_group_repeat_aux:n { #2 + #3 }
+ \if_meaning:w \c_true_bool #4
+ \int_set_eq:NN \l_regex_left_state_int \l_regex_max_state_int
+ \prg_replicate:nn { #3 }
+ {
+ \int_sub:Nn \l_regex_left_state_int
+ { \l_regex_internal_b_int - \l_regex_internal_a_int }
+ \regex_build_transition_left:NNN \regex_action_free:n
+ \l_regex_left_state_int \l_regex_max_state_int
+ }
+ \else:
+ \prg_replicate:nn { #3 - \c_one }
+ {
+ \int_sub:Nn \l_regex_right_state_int
+ { \l_regex_internal_b_int - \l_regex_internal_a_int }
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_right_state_int \l_regex_max_state_int
+ }
+ \if_num:w #2 = \c_zero
+ \int_set:Nn \l_regex_right_state_int
+ { \l_regex_left_state_int - \c_one }
+ \else:
+ \int_sub:Nn \l_regex_right_state_int
+ { \l_regex_internal_b_int - \l_regex_internal_a_int }
+ \fi:
+ \regex_build_transition_right:nNn \regex_action_free:n
+ \l_regex_right_state_int \l_regex_max_state_int
+ \fi:
+ \regex_build_new_state:
+ }
+\cs_new_protected:Npn \regex_assertion:Nn #1#2
+ {
+ \regex_build_new_state:
+ \regex_toks_put_right:Nx \l_regex_left_state_int
+ {
+ \exp_not:n {#2}
+ \regex_break_point:TF
+ \bool_if:NF #1 { { } }
+ {
+ \regex_action_free:n
+ {
+ \int_eval:n
+ { \l_regex_right_state_int - \l_regex_left_state_int }
+ }
+ }
+ \bool_if:NT #1 { { } }
+ }
+ }
+\cs_new_protected:Npn \regex_anchor:N #1
+ {
+ \if_num:w #1 = \l_regex_current_pos_int
+ \exp_after:wN \regex_break_true:w
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_b_test:
+ {
+ \group_begin:
+ \int_set_eq:NN \l_regex_current_char_int \l_regex_last_char_int
+ \regex_prop_w:
+ \regex_break_point:TF
+ { \group_end: \regex_item_reverse:n \regex_prop_w: }
+ { \group_end: \regex_prop_w: }
+ }
+\cs_new_protected_nopar:Npn \regex_command_K:
+ {
+ \regex_build_new_state:
+ \regex_toks_put_right:Nx \l_regex_left_state_int
+ {
+ \regex_action_submatch:n { 0< }
+ \bool_set_true:N \l_regex_fresh_thread_bool
+ \regex_action_free:n
+ { \int_eval:n { \l_regex_right_state_int - \l_regex_left_state_int } }
+ \bool_set_false:N \l_regex_fresh_thread_bool
+ }
+ }
+\int_new:N \l_regex_min_pos_int
+\int_new:N \l_regex_max_pos_int
+\int_new:N \l_regex_current_pos_int
+\int_new:N \l_regex_start_pos_int
+\int_new:N \l_regex_success_pos_int
+\int_new:N \l_regex_current_char_int
+\int_new:N \l_regex_current_catcode_int
+\int_new:N \l_regex_last_char_int
+\int_new:N \l_regex_case_changed_char_int
+\int_new:N \l_regex_current_state_int
+\prop_new:N \l_regex_current_submatches_prop
+\prop_new:N \l_regex_success_submatches_prop
+\int_new:N \l_regex_step_int
+\int_new:N \l_regex_min_active_int
+\int_new:N \l_regex_max_active_int
+\tl_new:N \l_regex_every_match_tl
+\bool_new:N \l_regex_fresh_thread_bool
+\bool_new:N \l_regex_empty_success_bool
+\cs_new_eq:NN \regex_if_two_empty_matches:F \use:n
+\bool_new:N \g_regex_success_bool
+\bool_new:N \l_regex_saved_success_bool
+\bool_new:N \l_regex_match_success_bool
+\cs_new_protected:Npn \regex_match:n #1
+ {
+ \trace_push:nnx { regex } { 1 } { regex_match }
+ \trace:nnx { regex } { 1 } { analyzing~query~token~list }
+ \int_zero:N \l_regex_balance_int
+ \int_set:Nn \l_regex_current_pos_int { \c_two * \l_regex_max_state_int }
+ \regex_query_set:nnn { } { -1 } { -2 }
+ \int_set_eq:NN \l_regex_min_pos_int \l_regex_current_pos_int
+ \tl_analysis_map_inline:nn {#1}
+ { \regex_query_set:nnn {##1} {"##2} {##3} }
+ \int_set_eq:NN \l_regex_max_pos_int \l_regex_current_pos_int
+ \regex_query_set:nnn { } { -1 } { -2 }
+ \trace:nnx { regex } { 1 } { initializing }
+ \bool_gset_false:N \g_regex_success_bool
+ \prg_stepwise_inline:nnnn
+ \l_regex_min_state_int \c_one { \l_regex_max_state_int - \c_one }
+ { \tex_dimen:D ##1 \c_one sp \scan_stop: }
+ \int_set_eq:NN \l_regex_min_active_int \l_regex_max_state_int
+ \int_set_eq:NN \l_regex_step_int \c_zero
+ \int_set_eq:NN \l_regex_success_pos_int \l_regex_min_pos_int
+ \int_set:Nn \l_regex_submatch_int
+ { \c_two * \l_regex_max_state_int }
+ \bool_set_false:N \l_regex_empty_success_bool
+ \regex_match_once:
+ \trace_pop:nnx { regex } { 1 } { regex_match }
+ }
+\cs_new_protected_nopar:Npn \regex_match_once:
+ {
+ \if_meaning:w \c_true_bool \l_regex_empty_success_bool
+ \cs_set_nopar:Npn \regex_if_two_empty_matches:F
+ { \int_compare:nNnF \l_regex_start_pos_int = \l_regex_current_pos_int }
+ \else:
+ \cs_set_eq:NN \regex_if_two_empty_matches:F \use:n
+ \fi:
+ \int_set_eq:NN \l_regex_start_pos_int \l_regex_success_pos_int
+ \bool_set_false:N \l_regex_match_success_bool
+ \prop_clear:N \l_regex_current_submatches_prop
+ \int_set_eq:NN \l_regex_max_active_int \l_regex_min_active_int
+ \regex_store_state:n { \l_regex_min_state_int }
+ \int_set:Nn \l_regex_current_pos_int
+ { \l_regex_start_pos_int - \c_one }
+ \regex_query_get:
+ \regex_match_loop:
+ \l_regex_every_match_tl
+ }
+\cs_new_protected_nopar:Npn \regex_single_match:
+ {
+ \tl_set:Nn \l_regex_every_match_tl
+ { \bool_gset_eq:NN \g_regex_success_bool \l_regex_match_success_bool }
+ }
+\cs_new_protected:Npn \regex_multi_match:n #1
+ {
+ \tl_set:Nn \l_regex_every_match_tl
+ {
+ \if_meaning:w \c_true_bool \l_regex_match_success_bool
+ \bool_gset_true:N \g_regex_success_bool
+ #1
+ \exp_after:wN \regex_match_once:
+ \fi:
+ }
+ }
+\cs_new_protected_nopar:Npn \regex_match_loop:
+ {
+ \tex_advance:D \l_regex_step_int \c_two
+ \int_incr:N \l_regex_current_pos_int
+ \int_set_eq:NN \l_regex_last_char_int \l_regex_current_char_int
+ \int_set_eq:NN \l_regex_case_changed_char_int \c_max_int
+ \regex_query_get:
+ \use:x
+ {
+ \int_set_eq:NN \l_regex_max_active_int \l_regex_min_active_int
+ \exp_after:wN \regex_match_one_active:w
+ \int_use:N \l_regex_min_active_int ;
+ }
+ \prg_break_point:n { \bool_set_false:N \l_regex_fresh_thread_bool }
+ \if_num:w \l_regex_max_active_int > \l_regex_min_active_int
+ \if_num:w \l_regex_current_pos_int < \l_regex_max_pos_int
+ \exp_after:wN \exp_after:wN \exp_after:wN \regex_match_loop:
+ \fi:
+ \fi:
+ }
+\cs_new:Npn \regex_match_one_active:w #1;
+ {
+ \if_num:w #1 < \l_regex_max_active_int
+ \regex_use_state_and_submatches:nn
+ { \int_value:w \tex_skip:D #1 }
+ { \tex_the:D \tex_toks:D #1 }
+ \exp_after:wN \regex_match_one_active:w
+ \int_use:N \int_eval:w #1 + \c_one \exp_after:wN ;
+ \fi:
+ }
+\cs_new_protected:Npn \regex_query_set:nnn #1#2#3
+ {
+ \tex_muskip:D \l_regex_current_pos_int
+ = \etex_gluetomu:D
+ #3 sp
+ plus #2 sp
+ minus \l_regex_balance_int sp
+ \scan_stop:
+ \tex_toks:D \l_regex_current_pos_int {#1}
+ \int_incr:N \l_regex_current_pos_int
+ \if_case:w #2 \exp_stop_f:
+ \or: \int_incr:N \l_regex_balance_int
+ \or: \int_decr:N \l_regex_balance_int
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_query_get:
+ {
+ \l_regex_current_char_int
+ = \etex_mutoglue:D \tex_muskip:D \l_regex_current_pos_int
+ \l_regex_current_catcode_int = \etex_gluestretch:D
+ \etex_mutoglue:D \tex_muskip:D \l_regex_current_pos_int
+ }
+\cs_new_protected_nopar:Npn \regex_use_state:
+ {
+ \trace:nnx { regex } { 2 } { state~\int_use:N \l_regex_current_state_int }
+ \tex_dimen:D \l_regex_current_state_int
+ = \l_regex_step_int sp \scan_stop:
+ \tex_the:D \tex_toks:D \l_regex_current_state_int
+ \tex_dimen:D \l_regex_current_state_int
+ = \int_eval:w \l_regex_step_int + \c_one \int_eval_end: sp \scan_stop:
+ }
+\cs_new_protected:Npn \regex_use_state_and_submatches:nn #1 #2
+ {
+ \int_set:Nn \l_regex_current_state_int {#1}
+ \if_num:w \tex_dimen:D \l_regex_current_state_int < \l_regex_step_int
+ \tl_set:Nn \l_regex_current_submatches_prop {#2}
+ \exp_after:wN \regex_use_state:
+ \fi:
+ \scan_stop:
+ }
+\cs_new_protected_nopar:Npn \regex_action_start_wildcard:
+ {
+ \bool_set_true:N \l_regex_fresh_thread_bool
+ \regex_action_free:n {1}
+ \bool_set_false:N \l_regex_fresh_thread_bool
+ \regex_action_cost:n {0}
+ }
+\cs_new_protected_nopar:Npn \regex_action_free:n
+ { \regex_action_free_aux:nn { > \l_regex_step_int \else: } }
+\cs_new_protected_nopar:Npn \regex_action_free_group:n
+ { \regex_action_free_aux:nn { < \l_regex_step_int } }
+\cs_new_protected:Npn \regex_action_free_aux:nn #1#2
+ {
+ \use:x
+ {
+ \int_add:Nn \l_regex_current_state_int {#2}
+ \exp_not:n
+ {
+ \if_num:w \tex_dimen:D \l_regex_current_state_int #1
+ \exp_after:wN \regex_use_state:
+ \fi:
+ }
+ \int_set:Nn \l_regex_current_state_int
+ { \int_use:N \l_regex_current_state_int }
+ \tl_set:Nn \exp_not:N \l_regex_current_submatches_prop
+ { \exp_not:o \l_regex_current_submatches_prop }
+ }
+ }
+\cs_new_protected:Npn \regex_action_cost:n #1
+ {
+ \exp_args:No \regex_store_state:n
+ { \int_use:N \int_eval:w \l_regex_current_state_int + #1 }
+ }
+\cs_new_protected:Npn \regex_store_state:n #1
+ {
+ \regex_store_submatches:
+ \tex_skip:D \l_regex_max_active_int = #1 sp \scan_stop:
+ \int_incr:N \l_regex_max_active_int
+ }
+\cs_new_protected_nopar:Npn \regex_store_submatches:
+ {
+ \tex_toks:D \l_regex_max_active_int \exp_after:wN
+ { \l_regex_current_submatches_prop }
+ }
+\cs_new_protected_nopar:Npn \regex_disable_submatches:
+ {
+ \cs_set_protected_nopar:Npn \regex_store_submatches: { }
+ \cs_set_protected:Npn \regex_action_submatch:n ##1 { }
+ }
+\cs_new_protected:Npn \regex_action_submatch:n #1
+ {
+ \prop_put:Nno \l_regex_current_submatches_prop {#1}
+ { \int_use:N \l_regex_current_pos_int }
+ }
+\cs_new_protected_nopar:Npn \regex_action_success:
+ {
+ \regex_if_two_empty_matches:F
+ {
+ \bool_set_true:N \l_regex_match_success_bool
+ \bool_set_eq:NN \l_regex_empty_success_bool
+ \l_regex_fresh_thread_bool
+ \int_set_eq:NN \l_regex_success_pos_int \l_regex_current_pos_int
+ \prop_set_eq:NN \l_regex_success_submatches_prop
+ \l_regex_current_submatches_prop
+ \prg_map_break:
+ }
+ }
+\int_new:N \l_regex_replacement_csnames_int
+\tl_new:N \l_regex_balance_tl
+\cs_new:Npn \regex_replacement_balance_one_match:n #1
+ { - \regex_submatch_balance:n {#1} }
+\cs_new:Npn \regex_replacement_do_one_match:n #1
+ {
+ \regex_query_range:nn
+ { \etex_glueshrink:D \tex_skip:D #1 }
+ { \tex_skip:D #1 }
+ }
+\cs_new:Npn \regex_replacement_exp_not:N #1 { \exp_not:n {#1} }
+\cs_new:Npn \regex_query_range:nn #1#2
+ {
+ \exp_after:wN \regex_query_range_loop:ww
+ \int_use:N \int_eval:w #1 \exp_after:wN ;
+ \int_use:N \int_eval:w #2 ;
+ \prg_break_point:n { }
+ }
+\cs_new:Npn \regex_query_range_loop:ww #1 ; #2 ;
+ {
+ \if_num:w #1 < #2 \exp_stop_f:
+ \else:
+ \exp_after:wN \prg_map_break:
+ \fi:
+ \tex_the:D \tex_toks:D #1 \exp_stop_f:
+ \exp_after:wN \regex_query_range_loop:ww
+ \int_use:N \int_eval:w #1 + \c_one ; #2 ;
+ }
+\cs_new:Npn \regex_query_submatch:n #1
+ {
+ \regex_query_range:nn
+ { \tex_skip:D \int_eval:w #1 }
+ { \etex_gluestretch:D \tex_skip:D \int_eval:w #1 }
+ }
+\cs_new_protected:Npn \regex_submatch_balance:n #1
+ {
+ \etex_glueshrink:D \etex_mutoglue:D \etex_muexpr:D
+ \tex_muskip:D \etex_gluestretch:D \tex_skip:D #1
+ - \tex_muskip:D \tex_skip:D #1
+ \scan_stop:
+ }
+\cs_new_protected:Npn \regex_replacement:n #1
+ {
+ \trace_push:nnn { regex } { 1 } { regex_replacement:n }
+ \tl_set_build:Nw \l_regex_internal_a_tl
+ \int_zero:N \l_regex_balance_int
+ \tl_clear:N \l_regex_balance_tl
+ \regex_escape_use:nnnn
+ {
+ \if_charcode:w \c_rbrace_str ##1
+ \regex_replacement_rbrace:N \else: \tl_build_one:n \fi: ##1
+ }
+ { \regex_replacement_escaped:N ##1 }
+ { \tl_build_one:n ##1 }
+ {#1}
+ \prg_do_nothing: \prg_do_nothing:
+ \if_int_compare:w \l_regex_replacement_csnames_int > \c_zero
+ \msg_kernel_error:nnx { regex } { replacement-missing-rbrace }
+ { \int_use:N \l_regex_replacement_csnames_int }
+ \tl_build_one:x
+ { \prg_replicate:nn \l_regex_replacement_csnames_int \cs_end: }
+ \fi:
+ \cs_gset:Npx \regex_replacement_balance_one_match:n ##1
+ {
+ + \int_use:N \l_regex_balance_int
+ \l_regex_balance_tl
+ - \regex_submatch_balance:n {##1}
+ }
+ \tl_build_end:
+ \exp_args:No \regex_replacement_aux:n \l_regex_internal_a_tl
+ \trace_pop:nnn { regex } { 1 } { regex_replacement:n }
+ }
+\cs_new_protected:Npn \regex_replacement_aux:n #1
+ {
+ \cs_set:Npn \regex_replacement_do_one_match:n ##1
+ {
+ \regex_query_range:nn
+ { \etex_glueshrink:D \tex_skip:D ##1 }
+ { \tex_skip:D ##1 }
+ #1
+ }
+ }
+\cs_new_protected:Npn \regex_replacement_escaped:N #1
+ {
+ \cs_if_exist_use:cF { regex_replacement_#1:w }
+ {
+ \if_num:w \c_one < 1#1 \exp_stop_f:
+ \regex_replacement_put_submatch:n {#1}
+ \else:
+ \tl_build_one:n #1
+ \fi:
+ }
+ }
+\cs_new_protected:Npn \regex_replacement_put_submatch:n #1
+ {
+ \if_num:w #1 < \l_regex_capturing_group_int
+ \tl_build_one:n { \regex_query_submatch:n { #1 + ##1 } }
+ \if_num:w \l_regex_replacement_csnames_int = \c_zero
+ \tl_put_right:Nn \l_regex_balance_tl
+ { + \regex_submatch_balance:n { \int_eval:w #1+##1 \int_eval_end: } }
+ \fi:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_replacement_g:w #1#2
+ {
+ \str_if_eq:xxTF { #1#2 } { \tl_build_one:n \c_lbrace_str }
+ {
+ \int_zero:N \l_regex_internal_a_int
+ \regex_replacement_g_digits:NN
+ }
+ { \regex_replacement_error:NNN g #1 #2 }
+ }
+\cs_new_protected:Npn \regex_replacement_g_digits:NN #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \tl_build_one:n
+ {
+ \if_num:w \c_one < 1#2 \exp_stop_f:
+ \int_set:Nn \l_regex_internal_a_int
+ { \c_ten * \l_regex_internal_a_int + #2 }
+ \exp_after:wN \use_i:nnn
+ \exp_after:wN \regex_replacement_g_digits:NN
+ \else:
+ \exp_after:wN \regex_replacement_error:NNN
+ \exp_after:wN g
+ \fi:
+ }
+ {
+ \if_meaning:w \regex_replacement_rbrace:N #1
+ \exp_args:No \regex_replacement_put_submatch:n
+ { \int_use:N \l_regex_internal_a_int }
+ \exp_after:wN \use_none:nn
+ \else:
+ \exp_after:wN \regex_replacement_error:NNN
+ \exp_after:wN g
+ \fi:
+ }
+ #1 #2
+ }
+\cs_new_protected:Npn \regex_replacement_c:w #1#2
+ {
+ \token_if_eq_meaning:NNTF #1 \tl_build_one:n
+ {
+ \cs_if_exist_use:cF { regex_replacement_c_#2:w }
+ { \regex_replacement_error:NNN c #1#2 }
+ }
+ { \regex_replacement_error:NNN c #1#2 }
+ }
+\cs_new_protected_nopar:cpn { regex_replacement_c_ \c_lbrace_str :w }
+ {
+ \if_case:w \l_regex_replacement_csnames_int
+ \tl_build_one:n
+ { \exp_not:n { \exp_after:wN \regex_replacement_exp_not:N \cs:w } }
+ \else:
+ \tl_build_one:n { \exp_not:n { \exp_after:wN \tl_to_str:N \cs:w } }
+ \fi:
+ \int_incr:N \l_regex_replacement_csnames_int
+ }
+\cs_new_protected:Npn \regex_replacement_u:w #1#2
+ {
+ \str_if_eq:xxTF { #1#2 } { \tl_build_one:n \c_lbrace_str }
+ {
+ \if_case:w \l_regex_replacement_csnames_int
+ \tl_build_one:n { \exp_not:n { \exp_after:wN \exp_not:V \cs:w } }
+ \else:
+ \tl_build_one:n { \exp_not:n { \exp_after:wN \tl_to_str:V \cs:w } }
+ \fi:
+ \int_incr:N \l_regex_replacement_csnames_int
+ }
+ { \regex_replacement_error:NNN u #1#2 }
+ }
+\cs_new_protected:Npn \regex_replacement_rbrace:N #1
+ {
+ \if_int_compare:w \l_regex_replacement_csnames_int > \c_zero
+ \tl_build_one:n \cs_end:
+ \int_decr:N \l_regex_replacement_csnames_int
+ \else:
+ \tl_build_one:n #1
+ \fi:
+ }
+\group_begin:
+ \cs_new_protected:Npn \regex_replacement_char:nNN #1#2#3
+ {
+ \if_meaning:w \prg_do_nothing: #3
+ \msg_kernel_error:nn { regex } { replacement-catcode-end }
+ \else:
+ \tex_lccode:D \c_zero = `#3 \scan_stop:
+ \tl_to_lowercase:n { \tl_build_one:n {#1} }
+ \fi:
+ }
+ \char_set_catcode_active:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_A:w
+ { \regex_replacement_char:nNN { \exp_not:n { \exp_not:N ^^@ } } }
+ \char_set_catcode_group_begin:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_B:w
+ {
+ \if_num:w \l_regex_replacement_csnames_int = \c_zero
+ \int_incr:N \l_regex_balance_int
+ \fi:
+ \regex_replacement_char:nNN
+ { \exp_not:n { \exp_after:wN ^^@ \if_false: } \fi: } }
+ }
+ \cs_new_protected:Npn \regex_replacement_c_C:w #1#2
+ { \tl_build_one:n { \exp_not:N \exp_not:N \exp_not:c {#2} } }
+ \char_set_catcode_math_subscript:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_D:w
+ { \regex_replacement_char:nNN { ^^@ } }
+ \char_set_catcode_group_end:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_E:w
+ {
+ \if_num:w \l_regex_replacement_csnames_int = \c_zero
+ \int_decr:N \l_regex_balance_int
+ \fi:
+ \regex_replacement_char:nNN
+ { \exp_not:n { \if_false: { \fi: ^^@ } }
+ }
+ \char_set_catcode_letter:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_L:w
+ { \regex_replacement_char:nNN { ^^@ } }
+ \char_set_catcode_math_toggle:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_M:w
+ { \regex_replacement_char:nNN { ^^@ } }
+ \char_set_catcode_other:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_O:w
+ { \regex_replacement_char:nNN { ^^@ } }
+ \char_set_catcode_parameter:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_P:w
+ {
+ \regex_replacement_char:nNN
+ { \exp_not:n { \exp_not:n { ^^@^^@^^@^^@ } } }
+ }
+ \cs_new_protected:Npn \regex_replacement_c_S:w #1#2
+ {
+ \if_meaning:w \prg_do_nothing: #2
+ \msg_kernel_error:nn { regex } { replacement-catcode-end }
+ \else:
+ \if_num:w `#2 = \c_zero
+ \msg_kernel_error:nn { regex } { replacement-null-space }
+ \fi:
+ \tex_lccode:D 32 = `#2 \scan_stop:
+ \tl_to_lowercase:n { \tl_build_one:n {~} }
+ \fi:
+ }
+ \char_set_catcode_alignment:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_T:w
+ { \regex_replacement_char:nNN { ^^@ } }
+ \char_set_catcode_math_superscript:N \^^@
+ \cs_new_protected_nopar:Npn \regex_replacement_c_U:w
+ { \regex_replacement_char:nNN { ^^@ } }
+\group_end:
+\cs_new_protected:Npn \regex_replacement_error:NNN #1#2#3
+ {
+ \msg_kernel_error:nnx { regex } { replacement-#1 } {#3}
+ #2 #3
+ }
+\cs_new_protected:Npn \regex_new:N #1
+ { \cs_new_eq:NN #1 \c_regex_no_match_regex }
+\cs_new_protected_nopar:Npn \regex_set:Nn #1#2
+ {
+ \regex_compile:n {#2}
+ \tl_set_eq:NN #1 \l_regex_internal_regex
+ }
+\cs_new_protected_nopar:Npn \regex_gset:Nn #1#2
+ {
+ \regex_compile:n {#2}
+ \tl_gset_eq:NN #1 \l_regex_internal_regex
+ }
+\cs_new_protected_nopar:Npn \regex_const:Nn #1#2
+ {
+ \regex_compile:n {#2}
+ \tl_const:Nx #1 { \exp_not:o \l_regex_internal_regex }
+ }
+\cs_new_protected:Npn \regex_show:n #1
+ {
+ \regex_compile:n {#1}
+ \regex_show_aux:Nx \l_regex_internal_regex
+ { { \tl_to_str:n {#1} } }
+ }
+\cs_new_protected:Npn \regex_show:N #1
+ { \regex_show_aux:Nx #1 { variable~\token_to_str:N #1 } }
+\prg_new_protected_conditional:Npnn \regex_match:nn #1#2 { T , F , TF }
+ {
+ \regex_match_aux:nn { \regex_build:n {#1} } {#2}
+ \regex_aux_return:
+ }
+\prg_new_protected_conditional:Npnn \regex_match:Nn #1#2 { T , F , TF }
+ {
+ \regex_match_aux:nn { \regex_build:N #1 } {#2}
+ \regex_aux_return:
+ }
+\cs_new_protected:Npn \regex_count:nnN #1
+ { \regex_count_aux:nnN { \regex_build:n {#1} } }
+\cs_new_protected:Npn \regex_count:NnN #1
+ { \regex_count_aux:nnN { \regex_build:N #1 } }
+\cs_set_protected:Npn \regex_tmp:w #1#2#3
+ {
+ \cs_new_protected:Npn #2 ##1 { #1 { \regex_build:n {##1} } }
+ \cs_new_protected:Npn #3 ##1 { #1 { \regex_build:N ##1 } }
+ \prg_new_protected_conditional:Npnn #2 ##1##2##3 { T , F , TF }
+ { #1 { \regex_build:n {##1} } {##2} ##3 \regex_aux_return: }
+ \prg_new_protected_conditional:Npnn #3 ##1##2##3 { T , F , TF }
+ { #1 { \regex_build:N ##1 } {##2} ##3 \regex_aux_return: }
+ }
+\regex_tmp:w \regex_extract_once_aux:nnN
+ \regex_extract_once:nnN \regex_extract_once:NnN
+\regex_tmp:w \regex_extract_all_aux:nnN
+ \regex_extract_all:nnN \regex_extract_all:NnN
+\regex_tmp:w \regex_replace_once_aux:nnN
+ \regex_replace_once:nnN \regex_replace_once:NnN
+\regex_tmp:w \regex_replace_all_aux:nnN
+ \regex_replace_all:nnN \regex_replace_all:NnN
+\regex_tmp:w \regex_split_aux:nnN \regex_split:nnN \regex_split:NnN
+\int_new:N \l_regex_match_count_int
+\flag_new:n { regex_begin }
+\flag_new:n { regex_end }
+\int_new:N \l_regex_submatch_int
+\int_new:N \l_regex_zeroth_submatch_int
+\cs_new_protected_nopar:Npn \regex_aux_return:
+ {
+ \if_meaning:w \c_true_bool \g_regex_success_bool
+ \prg_return_true:
+ \else:
+ \prg_return_false:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_match_aux:nn #1#2
+ {
+ \group_begin:
+ \regex_disable_submatches:
+ \regex_single_match:
+ #1
+ \regex_match:n {#2}
+ \group_end:
+ }
+\cs_new_protected:Npn \regex_count_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_disable_submatches:
+ \int_zero:N \l_regex_match_count_int
+ \regex_multi_match:n { \int_incr:N \l_regex_match_count_int }
+ #1
+ \regex_match:n {#2}
+ \exp_args:NNNo
+ \group_end:
+ \int_set:Nn #3 { \int_use:N \l_regex_match_count_int }
+ }
+\cs_new_protected:Npn \regex_extract_once_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_single_match:
+ #1
+ \regex_match:n {#2}
+ \regex_extract:
+ \regex_group_end_extract_seq:N #3
+ }
+\cs_new_protected:Npn \regex_extract_all_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_multi_match:n { \regex_extract: }
+ #1
+ \regex_match:n {#2}
+ \regex_group_end_extract_seq:N #3
+ }
+\cs_new_protected:Npn \regex_split_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_multi_match:n
+ {
+ \if_num:w \l_regex_start_pos_int < \l_regex_success_pos_int
+ \regex_extract:
+ \tex_skip:D \l_regex_zeroth_submatch_int
+ = \l_regex_start_pos_int sp
+ plus \tex_skip:D \l_regex_zeroth_submatch_int \scan_stop:
+ \fi:
+ }
+ #1
+ \regex_match:n {#2}
+ \tex_skip:D \l_regex_submatch_int
+ = \l_regex_start_pos_int sp plus \l_regex_max_pos_int sp \scan_stop:
+ \int_incr:N \l_regex_submatch_int
+ \if_meaning:w \c_true_bool \l_regex_empty_success_bool
+ \if_num:w \l_regex_start_pos_int = \l_regex_max_pos_int
+ \int_decr:N \l_regex_submatch_int
+ \fi:
+ \fi:
+ \regex_group_end_extract_seq:N #3
+ }
+\cs_new_protected:Npn \regex_group_end_extract_seq:N #1
+ {
+ \cs_set_eq:NN \seq_item:n \scan_stop:
+ \flag_clear:n { regex_begin }
+ \flag_clear:n { regex_end }
+ \tl_set:Nx \l_regex_internal_a_tl
+ {
+ \prg_stepwise_function:nnnN
+ { \c_two * \l_regex_max_state_int }
+ \c_one
+ { \l_regex_submatch_int - \c_one }
+ \regex_extract_seq_aux:n
+ }
+ \int_compare:nNnF
+ { \flag_height:n { regex_begin } + \flag_height:n { regex_end } }
+ = \c_zero
+ {
+ \msg_kernel_error:nnxxx { regex } { result-unbalanced }
+ { splitting~or~extracting~submatches }
+ { \flag_height:n { regex_end } }
+ { \flag_height:n { regex_begin } }
+ }
+ \use:x
+ {
+ \group_end:
+ \tl_set:Nn \exp_not:N #1 { \l_regex_internal_a_tl }
+ }
+ }
+\cs_new:Npn \regex_extract_seq_aux:n #1
+ {
+ \seq_item:n
+ {
+ \exp_after:wN \regex_extract_seq_aux:ww
+ \int_value:w \regex_submatch_balance:n {#1} ; #1;
+ }
+ }
+\cs_new:Npn \regex_extract_seq_aux:ww #1; #2;
+ {
+ \if_num:w #1 < \c_zero
+ \flag_raise:n { regex_end }
+ \prg_replicate:nn {-#1} { \exp_not:n { { \if_false: } \fi: } }
+ \fi:
+ \regex_query_submatch:n {#2}
+ \if_num:w #1 > \c_zero
+ \flag_raise:n { regex_begin }
+ \prg_replicate:nn {#1} { \exp_not:n { \if_false: { \fi: } } }
+ \fi:
+ }
+\cs_new_protected_nopar:Npn \regex_extract:
+ {
+ \if_meaning:w \c_true_bool \g_regex_success_bool
+ \int_set_eq:NN \l_regex_zeroth_submatch_int \l_regex_submatch_int
+ \prg_replicate:nn \l_regex_capturing_group_int
+ {
+ \tex_skip:D \l_regex_submatch_int \c_zero sp \scan_stop:
+ \int_incr:N \l_regex_submatch_int
+ }
+ \prop_map_inline:Nn \l_regex_success_submatches_prop
+ {
+ \if_num:w ##1 \c_minus_one
+ \exp_after:wN \regex_extract_aux_e:wn \int_value:w
+ \else:
+ \exp_after:wN \regex_extract_aux_b:wn \int_value:w
+ \fi:
+ \int_eval:w \l_regex_zeroth_submatch_int + ##1 {##2}
+ }
+ \tex_skip:D \l_regex_zeroth_submatch_int
+ = \tex_the:D \tex_skip:D \l_regex_zeroth_submatch_int
+ minus \l_regex_start_pos_int sp \scan_stop:
+ \fi:
+ }
+\cs_new_protected:Npn \regex_extract_aux_b:wn #1 < #2
+ {
+ \tex_skip:D #1 = #2 sp
+ plus \etex_gluestretch:D \tex_skip:D #1 \scan_stop:
+ }
+\cs_new_protected:Npn \regex_extract_aux_e:wn #1 > #2
+ {
+ \tex_skip:D #1
+ = 1 \tex_skip:D #1 plus #2 sp \scan_stop:
+ }
+\cs_new_protected:Npn \regex_replace_once_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_single_match:
+ #1
+ \regex_replacement:n {#2}
+ \exp_args:No \regex_match:n { #3 }
+ \if_meaning:w \c_false_bool \g_regex_success_bool
+ \group_end:
+ \else:
+ \regex_extract:
+ \int_set:Nn \l_regex_balance_int
+ {
+ \regex_replacement_balance_one_match:n
+ { \l_regex_zeroth_submatch_int }
+ }
+ \tl_set:Nx \l_regex_internal_a_tl
+ {
+ \regex_replacement_do_one_match:n { \l_regex_zeroth_submatch_int }
+ \regex_query_range:nn
+ { \etex_gluestretch:D \tex_skip:D \l_regex_zeroth_submatch_int }
+ { \l_regex_max_pos_int }
+ }
+ \regex_group_end_replace:N #3
+ \fi:
+ }
+\cs_new_protected:Npn \regex_replace_all_aux:nnN #1#2#3
+ {
+ \group_begin:
+ \regex_multi_match:n { \regex_extract: }
+ #1
+ \regex_replacement:n {#2}
+ \exp_args:No \regex_match:n {#3}
+ \int_set:Nn \l_regex_balance_int
+ {
+ 0
+ \prg_stepwise_function:nnnN
+ { \c_two * \l_regex_max_state_int }
+ \l_regex_capturing_group_int
+ { \l_regex_submatch_int - \c_one }
+ \regex_replacement_balance_one_match:n
+ }
+ \tl_set:Nx \l_regex_internal_a_tl
+ {
+ \prg_stepwise_function:nnnN
+ { \c_two * \l_regex_max_state_int }
+ \l_regex_capturing_group_int
+ { \l_regex_submatch_int - \c_one }
+ \regex_replacement_do_one_match:n
+ \regex_query_range:nn
+ \l_regex_start_pos_int \l_regex_max_pos_int
+ }
+ \regex_group_end_replace:N #3
+ }
+\cs_new_protected_nopar:Npn \regex_group_end_replace:N #1
+ {
+ \if_num:w \l_regex_balance_int = \c_zero
+ \else:
+ \msg_kernel_error:nnxxx { regex } { result-unbalanced }
+ { replacing }
+ { \int_max:nn { - \l_regex_balance_int } { \c_zero } }
+ { \int_max:nn { \l_regex_balance_int } { \c_zero } }
+ \fi:
+ \use:x
+ {
+ \group_end:
+ \tl_set:Nn \exp_not:N #1
+ {
+ \if_int_compare:w \l_regex_balance_int < \c_zero
+ \prg_replicate:nn { - \l_regex_balance_int }
+ { { \if_false: } \fi: }
+ \fi:
+ \l_regex_internal_a_tl
+ \if_int_compare:w \l_regex_balance_int > \c_zero
+ \prg_replicate:nn { \l_regex_balance_int }
+ { \if_false: { \fi: } }
+ \fi:
+ }
+ }
+ }
+\msg_kernel_new:nnnn { regex } { trailing-backslash }
+ { Trailing~escape~character~\iow_char:N\\. }
+ {
+ A~regular~expression~or~its~replacement~text~ends~with~
+ the~escape~character~\iow_char:N\\.~It~will~be~ignored.
+ }
+\msg_kernel_new:nnnn { regex } { x-missing-rbrace }
+ { Missing~closing~brace~in~\iow_char:N\\x~hexadecimal~sequence. }
+ {
+ You~wrote~something~like~
+ `\iow_char:N\\x\{\int_to_hexadecimal:n{#1}'.~
+ The~closing~brace~is~missing.
+ }
+\msg_kernel_new:nnnn { regex } { x-overflow }
+ { Character~code~'#1'~too~large~in~\iow_char:N\\x~hexadecimal~sequence. }
+ {
+ You~wrote~something~like~
+ `\iow_char:N\\x\{\int_to_hexadecimal:n{#1}\}'.~
+ The~character~code~'#1'~is~larger~than~\int_use:N \c_max_char_int.
+ }
+\msg_kernel_new:nnnn { regex } { invalid-quantifier }
+ { Braced~quantifier~'#1'~may~not~be~followed~by~'#2'. }
+ {
+ The~character~'#2'~is~invalid~in~the~braced~quantifier~'#1'.~
+ The~only~valid~quantifiers~are~'*',~'?',~'+',~'{<int>}',~
+ '{<min>,}'~and~'{<min>,<max>}',~followed~or~not~by~'?'.
+ }
+\msg_kernel_new:nnnn { regex } { missing-rbrack }
+ { Missing~right~bracket~inserted~in~regular~expression. }
+ {
+ LaTeX~was~given~a~regular~expression~where~a~character~class~
+ was~started~with~'[',~but~the~matching~']'~is~missing.
+ }
+\msg_kernel_new:nnnn { regex } { missing-rparen }
+ {
+ Missing~right~parenthes\int_compare:nTF{#1=1}{i}{e}s~
+ inserted~in~regular~expression.
+ }
+ {
+ LaTeX~was~given~a~regular~expression~with~\int_eval:n{#1}~
+ more~left~parenthes\int_compare:nTF{#1=1}{i}{e}s~than~right~
+ parenthes\int_compare:nTF{#1=1}{i}{e}s.
+ }
+\msg_kernel_new:nnnn { regex } { extra-rparen }
+ { Extra~right~parenthesis~ignored~in~regular~expression. }
+ {
+ LaTeX~came~across~a~closing~parenthesis~when~no~submatch~group~
+ was~open.~The~parenthesis~will~be~ignored.
+ }
+\msg_kernel_new:nnnn { regex } { bad-escape }
+ {
+ Invalid~escape~\c_backslash_str #1~
+ \regex_if_in_cs:TF { within~a~control~sequence. }
+ {
+ \regex_if_in_class:TF
+ { in~a~character~class. }
+ { following~a~category~test. }
+ }
+ }
+ {
+ The~escape~sequence~\iow_char:N\\#1~may~not~appear~
+ \regex_if_in_cs:TF
+ {
+ within~a~control~sequence~test~introduced~by~
+ \iow_char:N\\c\iow_char:N\{.
+ }
+ {
+ \regex_if_in_class:TF
+ { within~a~character~class~ }
+ { following~a~category~test~such~as~\iow_char:N\\cL~ }
+ because~it~does~not~match~exactly~one~character.
+ }
+ }
+\msg_kernel_new:nnnn { regex } { range-missing-end }
+ { Invalid~end-point~for~range~'#1-#2'~in~character~class. }
+ {
+ The~end-point~'#2'~of~the~range~'#1-#2'~may~not~serve~as~an~
+ end-point~for~a~range:~alphanumeric~characters~should~not~be~
+ escaped,~and~non-alphanumeric~characters~should~be~escaped.
+ }
+\msg_kernel_new:nnnn { regex } { range-backwards }
+ { Range~[#1-#2]~out~of~order~in~character~class. }
+ {
+ In~ranges~of~characters~[x-y]~appearing~in~character~classes,~
+ the~first~character~code~must~not~be~larger~than~the~second.~
+ Here,~#1~has~character~code~\int_eval:n {`#1},~while~#2~has~
+ character~code~\int_eval:n {`#2}.
+ }
+\msg_kernel_new:nnnn { regex } { c-bad-mode }
+ { Invalid~nested~\iow_char:N\\c~escape~in~regular~expression. }
+ {
+ The~\iow_char:N\\c~escape~cannot~be~used~within~
+ a~control~sequence~test~'\iow_char:N\\c{...}'.~
+ To~combine~several~category~tests,~use~'\iow_char:N\\c[...]'.
+ }
+\msg_kernel_new:nnnn { regex } { c-missing-rbrace }
+ { Missing~right~brace~inserted~for~\iow_char:N\\c~escape. }
+ {
+ LaTeX~was~given~a~regular~expression~where~a~
+ '\iow_char:N\\c\iow_char:N\{...'~construction~was~not~ended~
+ with~a~closing~brace~'\iow_char:N\}'.
+ }
+\msg_kernel_new:nnnn { regex } { c-missing-rbrack }
+ { Missing~right~bracket~inserted~for~\iow_char:N\\c~escape. }
+ {
+ A~construction~'\iow_char:N\\c[...'~appears~in~a~
+ regular~expression,~but~the~closing~']'~is~not~present.
+ }
+\msg_kernel_new:nnnn { regex } { c-missing-category }
+ { Invalid~character~'#1'~following~\iow_char:N\\c~escape. }
+ {
+ In~regular~expressions,~the~\iow_char:N\\c~escape~sequence~
+ may~only~be~followed~by~a~left~brace,~a~left~bracket,~or~a~
+ capital~letter~representing~a~character~category,~namely~
+ one~of~ABCDELMOPSTU.
+ }
+\msg_kernel_new:nnnn { regex } { u-missing-lbrace }
+ { Missing~left~brace~following~\iow_char:N\\u~escape. }
+ {
+ The~\iow_char:N\\u~escape~sequence~must~be~followed~by~
+ a~brace~group~with~the~name~of~the~variable~to~use.
+ }
+\msg_kernel_new:nnnn { regex } { u-missing-rbrace }
+ { Missing~right~brace~inserted~for~\iow_char:N\\u~escape. }
+ {
+ LaTeX~
+ \tl_if_empty:xTF {#2}
+ { reached~the~end~of~the~string~ }
+ { encountered~an~escaped~alphanumeric~character '\iow_char:N\\#2'~ }
+ when~parsing~the~argument~of~an~'\iow_char:N\\u\iow_char:N\{...\}'~escape.
+ }
+\msg_kernel_new:nnnn { regex } { posix-unsupported }
+ { POSIX~collating~element~'[#1 ~ #1]'~not~supported. }
+ {
+ The~[.foo.]~and~[=bar=]~syntaxes~have~a~special~meaning~in~POSIX~
+ regular~expressions.~This~is~not~supported~by~LaTeX.~Maybe~you~
+ forgot~to~escape~a~left~bracket~in~a~character~class?
+ }
+\msg_kernel_new:nnnn { regex } { posix-unknown }
+ { POSIX~class~[:#1:]~unknown. }
+ {
+ [:#1:]~is~not~among~the~known~POSIX~classes~
+ [:alnum:],~[:alpha:],~[:ascii:],~[:blank:],~
+ [:cntrl:],~[:digit:],~[:graph:],~[:lower:],~
+ [:print:],~[:punct:],~[:space:],~[:upper:],~
+ [:word:],~and~[:xdigit:].
+ }
+\msg_kernel_new:nnnn { regex } { posix-missing-close }
+ { Missing~closing~':]'~for~POSIX~class. }
+ { The~POSIX~syntax~'#1'~must~be~followed~by~':]',~not~'#2'. }
+\msg_kernel_new:nnnn { regex } { result-unbalanced }
+ { Missing~brace~inserted~when~#1. }
+ {
+ LaTeX~was~asked~to~do~some~regular~expression~operation,~
+ and~the~resulting~token~list~would~not~have~the~same~number~
+ of~begin-group~and~end-group~tokens.~Braces~were~inserted:~
+ #2~left,~#3~right.
+ }
+\msg_kernel_new:nnnn { regex } { unknown-option }
+ { Unknown~option~`#1'~for~regular~expressions. }
+ {
+ The~only~available~option~is~'case-insensitive',~toggled~by~
+ '(?i)'~and~'(?-i)'.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-c }
+ { Misused~\iow_char:N\\c~command~in~a~replacement~text. }
+ {
+ In~a~replacement~text,~the~\iow_char:N\\c~escape~sequence~
+ can~be~followed~by~one~of~the~letters~ABCDELMOPSTU~
+ or~a~brace~group,~not~by~'#1'.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-u }
+ { Misused~\iow_char:N\\u~command~in~a~replacement~text. }
+ {
+ In~a~replacement~text,~the~\iow_char:N\\u~escape~sequence~
+ must~be~~followed~by~a~brace~group~holding~the~name~of~the~
+ variable~to~use.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-g }
+ { Missing~brace~for~the~\iow_char:N\\g~construction~in~a~replacement~text. }
+ {
+ In~the~replacement~text~for~a~regular~expression~search,~
+ submatches~are~represented~either~as~\iow_char:N \\g{dd..d},~
+ or~\\d,~where~`d'~are~single~digits.~Here,~a~brace~is~missing.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-catcode-end }
+ {
+ Missing~character~for~the~\iow_char:N\\c<category><character>~
+ construction~in~a~replacement~text.
+ }
+ {
+ In~a~replacement~text,~the~\iow_char:N\\c~escape~sequence~
+ can~be~followed~by~one~of~the~letters~ABCDELMOPSTU~representing~
+ the~character~category.~Then,~a~character~must~follow.~LaTeX~
+ reached~the~end~of~the~replacement~when~looking~for~that.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-null-space }
+ { TeX~cannot~build~a~space~token~with~character~code~0. }
+ {
+ You~asked~for~a~character~token~with~category~'space',~
+ and~character~code~0,~for~instance~through~
+ '\iow_char:N\\cS\iow_char:N\\x00'.~
+ This~specific~case~is~impossible~and~will~be~replaced~
+ by~a~normal~space.
+ }
+\msg_kernel_new:nnnn { regex } { replacement-missing-rbrace }
+ { Missing~right~brace~inserted~in~replacement~text. }
+ {
+ There~were~\int_use:N \l_regex_replacement_csnames_int \
+ missing~right~braces.
+ }
+\cs_new:Npn \regex_msg_repeated:nnN #1#2#3
+ {
+ \str_if_eq:xxF { #1 #2 } { 1 0 }
+ {
+ , ~ repeated ~
+ \prg_case_int:nnn {#2}
+ {
+ { -1 } { #1~or~more~times,~\bool_if:NTF #3 { lazy } { greedy } }
+ { 0 } { #1~times }
+ }
+ {
+ between~#1~and~\int_eval:n {#1+#2}~times,~
+ \bool_if:NTF #3 { lazy } { greedy }
+ }
+ }
+ }
+\cs_new_protected:Npn \regex_trace_states:n #1
+ {
+ \prg_stepwise_inline:nnnn
+ \l_regex_min_state_int
+ \c_one
+ { \l_regex_max_state_int - 1 }
+ {
+ \trace:nnx { regex } { #1 }
+ { \iow_char:N \\toks ##1 = { \tex_the:D \tex_toks:D ##1 } }
+ }
+ }
+%%
+%%
+%% End of file `l3regex-trace.sty'.