%option ecs
%option align
-Escape \\[\\'"bfnrtv]|\\0|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\\n
+Escape \\[\\'"bfnrtv]|\\[0-7]|\\[4-7][0-7]|\\[0-3][0-7][0-7]?|\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}|\\\n
IdentifierStart [a-zA-Z$_]
IdentifierPart [a-zA-Z$_0-9]
{IdentifierStart}{IdentifierPart}* L C I(identifier, Identifier(Y), tk::Identifier_, hi::Identifier);
+0[0-7]+ L C I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
+0[0-9]+ L C I(number, Number(strtoull(yytext + 1, NULL, 10)), tk::NumericLiteral, hi::Constant);
0[xX][0-9a-fA-F]+ L C I(number, Number(strtoull(yytext + 2, NULL, 16)), tk::NumericLiteral, hi::Constant);
-0[0-7]+ L C I(number, Number(strtoull(yytext + 1, NULL, 8)), tk::NumericLiteral, hi::Constant);
+0[oO][0-7]+ L C I(number, Number(strtoull(yytext + 2, NULL, 8)), tk::NumericLiteral, hi::Constant);
0[bB][0-1]+ L C I(number, Number(strtoull(yytext + 2, NULL, 2)), tk::NumericLiteral, hi::Constant);
(\.[0-9]+|(0|[1-9][0-9]*)(\.[0-9]*)?)([eE][+-]?[0-9]+)? L C I(number, Number(strtod(yytext, NULL)), tk::NumericLiteral, hi::Constant);
case 'r': next = '\r'; break;
case 't': next = '\t'; break;
case 'v': next = '\v'; break;
- case '0': next = '\0'; break;
+
+ case '0': case '1': case '2': case '3':
+ if (yytext[i + 1] < '0' || yytext[i + 1] > '7')
+ next = H(yytext[i]), i += 0;
+ else if (yytext[i + 2] < '0' || yytext[i + 2] > '7')
+ next = H(yytext[i]) << 3 | H(yytext[i + 1]), i += 1;
+ else
+ next = H(yytext[i]) << 6 | H(yytext[i + 1]) << 3 | H(yytext[i + 2]), i += 2;
+ break;
+
+ case '4': case '5': case '6': case '7':
+ if (yytext[i + 1] < '0' || yytext[i + 1] > '7')
+ next = H(yytext[i]), i += 0;
+ else
+ next = H(yytext[i]) << 3 | H(yytext[i + 1]), i += 1;
+ break;
case 'x':
next = H(yytext[i + 1]) << 4 | H(yytext[i + 2]);