diff -ur lua-5.3.4.orig/src/lctype.h lua-5.3.4/src/lctype.h --- lctype.h.orig 2017-10-24 15:14:50.724139638 +0200 +++ lctype.h 2017-10-24 15:15:51.704137138 +0200 @@ -53,9 +53,11 @@ /* ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' +** +** all utf-8 chars (greater than 0x7f) are always alphabetic */ -#define lislalpha(c) testprop(c, MASK(ALPHABIT)) -#define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) +#define lislalpha(c) (isalpha(c) || (c) == '_' || (c) > 0x7f) +#define lislalnum(c) (isalnum(c) || (c) == '_' || (c) > 0x7f) #define lisdigit(c) testprop(c, MASK(DIGITBIT)) #define lisspace(c) testprop(c, MASK(SPACEBIT)) #define lisprint(c) testprop(c, MASK(PRINTBIT))