FIRST_RESERVED
return ts->tsv.extra - 1 + FIRST_RESERVED;
if (token < FIRST_RESERVED) { /* single-byte symbols? */
const char *s = luaX_tokens[token - FIRST_RESERVED];
TK_AND = FIRST_RESERVED, TK_BREAK,
#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))