diff options
Diffstat (limited to 'tex/context/base/l-unicode.lua')
| -rw-r--r-- | tex/context/base/l-unicode.lua | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/tex/context/base/l-unicode.lua b/tex/context/base/l-unicode.lua index 02dd1a003..70b60324a 100644 --- a/tex/context/base/l-unicode.lua +++ b/tex/context/base/l-unicode.lua @@ -418,9 +418,11 @@ if not utf.sub then end end - local pattern_zero = Cmt(p_utf8char,slide_zero)^0 - local pattern_one = Cmt(p_utf8char,slide_one )^0 - local pattern_two = Cmt(p_utf8char,slide_two )^0 + local pattern_zero = Cmt(p_utf8char,slide_zero)^0 + local pattern_one = Cmt(p_utf8char,slide_one )^0 + local pattern_two = Cmt(p_utf8char,slide_two )^0 + + local pattern_first = C(patterns.utf8character) function utf.sub(str,start,stop) if not start then @@ -463,7 +465,9 @@ if not utf.sub then end end end - if start > stop then + if start == 1 and stop == 1 then + return lpegmatch(pattern_first,str) or "" + elseif start > stop then return "" elseif start > 1 then b, e, n, first, last = 0, 0, 0, start - 1, stop |