To: vim_dev@googlegroups.com Subject: Patch 7.3.1093 Fcc: outbox From: Bram Moolenaar Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ------------ Patch 7.3.1093 Problem: New regexp engine: When a sub expression is empty \1 skips a character. Solution: Make \1 try the current position when the match is emtpy. Files: src/regexp_nfa.c, src/testdir/test64.in, src/testdir/test64.ok *** ../vim-7.3.1092/src/regexp_nfa.c 2013-06-02 15:55:52.000000000 +0200 --- src/regexp_nfa.c 2013-06-02 16:03:28.000000000 +0200 *************** *** 4435,4445 **** { if (bytelen == 0) { ! /* empty match always works, add NFA_SKIP with zero to ! * be used next */ ! addstate_here(thislist, t->state->out, &t->subs, &listidx); - thislist->t[listidx + 1].count = 0; } else if (bytelen <= clen) { --- 4435,4444 ---- { if (bytelen == 0) { ! /* empty match always works, output of NFA_SKIP to be ! * used next */ ! addstate_here(thislist, t->state->out->out, &t->subs, &listidx); } else if (bytelen <= clen) { *** ../vim-7.3.1092/src/testdir/test64.in 2013-06-01 19:54:39.000000000 +0200 --- src/testdir/test64.in 2013-06-02 16:02:56.000000000 +0200 *************** *** 361,366 **** --- 361,367 ---- :call add(tl, [2, '\(\i\+\) \1', ' abc abc', 'abc abc', 'abc']) :call add(tl, [2, '\(\i\+\) \1', 'xgoo goox', 'goo goo', 'goo']) :call add(tl, [2, '\(a\)\(b\)\(c\)\(dd\)\(e\)\(f\)\(g\)\(h\)\(i\)\1\2\3\4\5\6\7\8\9', 'xabcddefghiabcddefghix', 'abcddefghiabcddefghi', 'a', 'b', 'c', 'dd', 'e', 'f', 'g', 'h', 'i']) + :call add(tl, [2, '\(\d*\)a \1b', ' a b ', 'a b', '']) :" :"""" Look-behind with limit :call add(tl, [2, '<\@<=span.', 'xxspanxx