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new syntax for Unicode escape '\u{012F}'

This commit is contained in:
Roberto Ierusalimschy 2014-02-14 13:23:51 -02:00
parent 90b0ac6495
commit 0b04c561f5
1 changed files with 8 additions and 5 deletions
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13
llex.c
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@ -1,5 +1,5 @@
/*
** $Id: llex.c,v 2.72 2014/02/04 18:57:34 roberto Exp roberto $
** $Id: llex.c,v 2.73 2014/02/06 15:59:24 roberto Exp roberto $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@ -345,15 +345,18 @@ static int readhexaesc (LexState *ls) {
static unsigned int readutf8esc (LexState *ls) {
int i = 3; /* chars to be removed: '\', 'u', and first digit */
unsigned int r = gethexa(ls); /* must have at least one digit */
unsigned int r;
int i = 4; /* chars to be removed: '\', 'u', '{', and first digit */
save_and_next(ls); /* skip 'u' */
esccheck(ls, ls->current == '{', "missing '{'");
r = gethexa(ls); /* must have at least one digit */
while ((save_and_next(ls), lisxdigit(ls->current))) {
i++;
r = (r << 4) + luaO_hexavalue(ls->current);
esccheck(ls, r <= 0x10FFFF, "UTF-8 value too large");
}
esccheck(ls, ls->current == ';', "missing ';' in UTF-8 escape");
next(ls); /* skip ';' */
esccheck(ls, ls->current == '}', "missing '}'");
next(ls); /* skip '}' */
luaZ_buffremove(ls->buff, i); /* remove saved chars from buffer */
return r;
}