diff options
Diffstat (limited to 'Master/texmf-dist/source/latex/l3kernel/l3regex.dtx')
-rw-r--r-- | Master/texmf-dist/source/latex/l3kernel/l3regex.dtx | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx b/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx index 37ea18408f3..85e9cf12b95 100644 --- a/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx +++ b/Master/texmf-dist/source/latex/l3kernel/l3regex.dtx @@ -43,7 +43,7 @@ % }^^A % } % -% \date{Released 2020-12-05} +% \date{Released 2020-12-07} % % \maketitle % @@ -6487,12 +6487,16 @@ % \begin{macro}{\@@_peek_end:, \@@_peek_remove_end:n} % Once the regex matches (or permanently fails to match) we call % \cs{@@_peek_end:}, or \cs{@@_peek_remove_end:n} with argument the -% last token seen (or rather tokens that \texttt{o}-expand and -% \texttt{x}-expand to it). For \cs{peek_regex:nTF} we reinsert -% tokens seen by calling \cs{@@_peek_reinsert:N} regardless of the -% result of the match. For \cs{peek_regex_remove_once:nTF} we reinsert the -% tokens seen only if the match failed; otherwise we just reinsert the -% tokens~|#1|, with one expansion. +% last token seen. For \cs{peek_regex:nTF} we reinsert tokens seen by +% calling \cs{@@_peek_reinsert:N} regardless of the result of the +% match. For \cs{peek_regex_remove_once:nTF} we reinsert the tokens +% seen only if the match failed; otherwise we just reinsert the +% tokens~|#1|, with one expansion. To be more precise, |#1| consists +% of tokens that \texttt{o}-expand and \texttt{x}-expand to the last +% token seen, for example it is \cs{exp_not:N} \meta{cs} for a control +% sequence. This means that just doing \cs{exp_after:wN} +% \cs{l_@@_peek_true_tl} |#1| would be unsafe because the expansion of +% \meta{cs} would be suppressed. % \begin{macrocode} \cs_new_protected:Npn \@@_peek_end: { @@ -6503,7 +6507,7 @@ \cs_new_protected:Npn \@@_peek_remove_end:n #1 { \bool_if:NTF \g_@@_success_bool - { \exp_after:wN \l_@@_peek_true_tl #1 } + { \exp_args:NNo \use:nn \l_@@_peek_true_tl {#1} } { \@@_peek_reinsert:N \l_@@_peek_false_tl } } % \end{macrocode} |