From: Ulya Trofimovich <skvadrik@gmail.com>
Date: Thu, 17 Jan 2019 22:52:04 +0000 (+0000)
Subject: Fixed operator precedence with --flex-syntax option.
X-Git-Tag: 1.2~214
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4dea13a1c7a467908e5bf452803e5f5cc17bbf08;p=re2c

Fixed operator precedence with --flex-syntax option.

Operator precedence was broken because re2c tried to parse whole strings
of characters at once instead of parsing one character at a time (in
much the same way as it would parse properly quotes string literals in
the original re2c format). This caused ab* being parsed as (ab)*, which
is clearly wrong (should be a(b)*).

This fixes bug #242:
    "Operator precedence with --flex-syntax is broken."
---

diff --git a/re2c/bootstrap/src/parse/lex.cc b/re2c/bootstrap/src/parse/lex.cc
index 19c3415c..f4bda69f 100644
--- a/re2c/bootstrap/src/parse/lex.cc
+++ b/re2c/bootstrap/src/parse/lex.cc
@@ -1,4 +1,4 @@
-/* Generated by re2c 1.1.1 on Thu Jan 10 23:17:36 2019 */
+/* Generated by re2c 1.1.1 on Thu Jan 17 22:27:03 2019 */
 #line 1 "../src/parse/lex.re"
 #include "src/util/c99_stdint.h"
 #include <stddef.h>
@@ -1276,7 +1276,7 @@ scan:
 yy223:
 	++YYCURSOR;
 yy224:
-#line 403 "../src/parse/lex.re"
+#line 402 "../src/parse/lex.re"
 	{
         fatal_lc(get_line(), get_column(), "unexpected character: '%c'", *tok);
         goto scan;
@@ -1289,7 +1289,7 @@ yy225:
 	if (yybm[0+yych] & 16) {
 		goto yy225;
 	}
-#line 385 "../src/parse/lex.re"
+#line 384 "../src/parse/lex.re"
 	{ goto scan; }
 #line 1295 "src/parse/lex.cc"
 yy228:
@@ -1302,7 +1302,7 @@ yy228:
 		if (yych == '#') goto yy258;
 	}
 yy229:
-#line 392 "../src/parse/lex.re"
+#line 391 "../src/parse/lex.re"
 	{
         next_line();
         if (lexer_state == LEX_FLEX_NAME) {
@@ -1355,7 +1355,7 @@ yy239:
 	goto yy235;
 yy240:
 	++YYCURSOR;
-#line 380 "../src/parse/lex.re"
+#line 379 "../src/parse/lex.re"
 	{
         yylval.regexp = ast_dot(get_line(), get_column());
         return TOKEN_REGEXP;
@@ -1400,24 +1400,23 @@ yy248:
             return TOKEN_FID;
         }
         else {
+            // consume one character, otherwise we risk breaking operator
+            // precedence in cases like ab*: it should be a(b)*, not (ab)*
+            cur = tok + 1;
+
             std::vector<ASTChar> *str = new std::vector<ASTChar>;
-            for (const char *s = tok; s < cur; ++s) {
-                const uint32_t
-                    chr = static_cast<uint8_t>(*s),
-                    col = static_cast<uint32_t>(s - tok);
-                str->push_back(ASTChar(chr, col));
-            }
+            str->push_back(ASTChar(static_cast<uint8_t>(tok[0]), 0));
             yylval.regexp = ast_str(get_line(), get_column(), str, false);
             return TOKEN_REGEXP;
         }
     }
-#line 1415 "src/parse/lex.cc"
+#line 1414 "src/parse/lex.cc"
 yy250:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '^') goto yy273;
 #line 304 "../src/parse/lex.re"
 	{ yylval.regexp = lex_cls(false); return TOKEN_REGEXP; }
-#line 1421 "src/parse/lex.cc"
+#line 1420 "src/parse/lex.cc"
 yy252:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == 'e') goto yy275;
@@ -1442,7 +1441,7 @@ yy253:
 yy254:
 #line 287 "../src/parse/lex.re"
 	{ lex_code_in_braces(); return TOKEN_CODE; }
-#line 1446 "src/parse/lex.cc"
+#line 1445 "src/parse/lex.cc"
 yy255:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -1507,22 +1506,22 @@ yy262:
             , newstr(tok + 1, cur), tok[0] == '#');
         return TOKEN_REGEXP;
     }
-#line 1511 "src/parse/lex.cc"
+#line 1510 "src/parse/lex.cc"
 yy263:
 	++YYCURSOR;
 #line 300 "../src/parse/lex.re"
 	{ tok = cur; return 0; }
-#line 1516 "src/parse/lex.cc"
+#line 1515 "src/parse/lex.cc"
 yy265:
 	++YYCURSOR;
 #line 298 "../src/parse/lex.re"
 	{ lex_c_comment(); goto scan; }
-#line 1521 "src/parse/lex.cc"
+#line 1520 "src/parse/lex.cc"
 yy267:
 	++YYCURSOR;
 #line 297 "../src/parse/lex.re"
 	{ lex_cpp_comment(); goto scan; }
-#line 1526 "src/parse/lex.cc"
+#line 1525 "src/parse/lex.cc"
 yy269:
 	yyaccept = 3;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
@@ -1530,7 +1529,7 @@ yy269:
 yy270:
 #line 288 "../src/parse/lex.re"
 	{ lex_code_indented(); return TOKEN_CODE; }
-#line 1534 "src/parse/lex.cc"
+#line 1533 "src/parse/lex.cc"
 yy271:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -1565,7 +1564,7 @@ yy273:
 	++YYCURSOR;
 #line 305 "../src/parse/lex.re"
 	{ yylval.regexp = lex_cls(true);  return TOKEN_REGEXP; }
-#line 1569 "src/parse/lex.cc"
+#line 1568 "src/parse/lex.cc"
 yy275:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '2') goto yy286;
@@ -1578,7 +1577,7 @@ yy277:
         fatal_lc(get_line(), get_column(),
             "illegal closure form, use '{n}', '{n,}', '{n,m}' where n and m are numbers");
     }
-#line 1582 "src/parse/lex.cc"
+#line 1581 "src/parse/lex.cc"
 yy278:
 	++YYCURSOR;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
@@ -1641,7 +1640,7 @@ yy285:
         yylval.str = newstr(p, cur);
         return tok[0] == ':' ? TOKEN_CJUMP : TOKEN_CNEXT;
     }
-#line 1645 "src/parse/lex.cc"
+#line 1644 "src/parse/lex.cc"
 yy286:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == 'c') goto yy293;
@@ -1663,7 +1662,7 @@ yy288:
         yylval.bounds.max = yylval.bounds.min;
         return TOKEN_CLOSESIZE;
     }
-#line 1667 "src/parse/lex.cc"
+#line 1666 "src/parse/lex.cc"
 yy290:
 	++YYCURSOR;
 #line 346 "../src/parse/lex.re"
@@ -1675,7 +1674,7 @@ yy290:
         yylval.str = newstr(tok + 1, cur - 1);
         return TOKEN_ID;
     }
-#line 1679 "src/parse/lex.cc"
+#line 1678 "src/parse/lex.cc"
 yy292:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == 'n') goto yy298;
@@ -1702,7 +1701,7 @@ yy296:
         yylval.bounds.max = std::numeric_limits<uint32_t>::max();
         return TOKEN_CLOSESIZE;
     }
-#line 1706 "src/parse/lex.cc"
+#line 1705 "src/parse/lex.cc"
 yy298:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == 'e') goto yy303;
@@ -1711,7 +1710,7 @@ yy299:
 	++YYCURSOR;
 #line 355 "../src/parse/lex.re"
 	{ return TOKEN_CONF; }
-#line 1715 "src/parse/lex.cc"
+#line 1714 "src/parse/lex.cc"
 yy301:
 	++YYCURSOR;
 	p = yyt1;
@@ -1725,7 +1724,7 @@ yy301:
         }
         return TOKEN_CLOSESIZE;
     }
-#line 1729 "src/parse/lex.cc"
+#line 1728 "src/parse/lex.cc"
 yy303:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '0') goto yy305;
@@ -1781,12 +1780,12 @@ yy308:
 yy310:
 	++YYCURSOR;
 	YYCURSOR = yyt1;
-#line 387 "../src/parse/lex.re"
+#line 386 "../src/parse/lex.re"
 	{
         set_sourceline ();
         return TOKEN_LINE_INFO;
     }
-#line 1790 "src/parse/lex.cc"
+#line 1789 "src/parse/lex.cc"
 yy312:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy310;
@@ -1812,14 +1811,14 @@ yy316:
 	if (yych == '\n') goto yy257;
 	goto yy313;
 }
-#line 407 "../src/parse/lex.re"
+#line 406 "../src/parse/lex.re"
 
 }
 
 bool Scanner::lex_namedef_context_re2c()
 {
 
-#line 1823 "src/parse/lex.cc"
+#line 1822 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -1874,9 +1873,9 @@ bool Scanner::lex_namedef_context_re2c()
 		}
 	}
 yy319:
-#line 414 "../src/parse/lex.re"
+#line 413 "../src/parse/lex.re"
 	{ return false; }
-#line 1880 "src/parse/lex.cc"
+#line 1879 "src/parse/lex.cc"
 yy320:
 	++YYCURSOR;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
@@ -1893,18 +1892,18 @@ yy323:
 	if (yych == '>') goto yy322;
 	++YYCURSOR;
 	YYCURSOR = yyt1;
-#line 413 "../src/parse/lex.re"
+#line 412 "../src/parse/lex.re"
 	{ return true; }
-#line 1899 "src/parse/lex.cc"
+#line 1898 "src/parse/lex.cc"
 }
-#line 415 "../src/parse/lex.re"
+#line 414 "../src/parse/lex.re"
 
 }
 
 bool Scanner::lex_namedef_context_flex()
 {
 
-#line 1908 "src/parse/lex.cc"
+#line 1907 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -1951,9 +1950,9 @@ bool Scanner::lex_namedef_context_flex()
 		yyt1 = YYCURSOR;
 		goto yy329;
 	}
-#line 423 "../src/parse/lex.re"
+#line 422 "../src/parse/lex.re"
 	{ return false; }
-#line 1957 "src/parse/lex.cc"
+#line 1956 "src/parse/lex.cc"
 yy329:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -1968,17 +1967,17 @@ yy329:
 		if (yych == '{') goto yy332;
 	}
 	YYCURSOR = yyt1;
-#line 422 "../src/parse/lex.re"
+#line 421 "../src/parse/lex.re"
 	{ return true; }
-#line 1974 "src/parse/lex.cc"
+#line 1973 "src/parse/lex.cc"
 yy332:
 	++YYCURSOR;
 	YYCURSOR = yyt1;
-#line 421 "../src/parse/lex.re"
+#line 420 "../src/parse/lex.re"
 	{ return false; }
-#line 1980 "src/parse/lex.cc"
+#line 1979 "src/parse/lex.cc"
 }
-#line 424 "../src/parse/lex.re"
+#line 423 "../src/parse/lex.re"
 
 }
 
@@ -1987,7 +1986,7 @@ int Scanner::lex_clist()
     int kind = TOKEN_CLIST;
     CondList *cl = new CondList;
 
-#line 1991 "src/parse/lex.cc"
+#line 1990 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -2037,30 +2036,30 @@ yy334:
 	if (yych <= '!') goto yy338;
 	if (yych == '>') goto yy341;
 yy337:
-#line 434 "../src/parse/lex.re"
+#line 433 "../src/parse/lex.re"
 	{ goto cond; }
-#line 2043 "src/parse/lex.cc"
+#line 2042 "src/parse/lex.cc"
 yy338:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = (YYCTYPE)*YYCURSOR;
 	if (yych == '\t') goto yy338;
 	if (yych == ' ') goto yy338;
-#line 432 "../src/parse/lex.re"
+#line 431 "../src/parse/lex.re"
 	{ kind = TOKEN_CSETUP; goto cond; }
-#line 2052 "src/parse/lex.cc"
+#line 2051 "src/parse/lex.cc"
 yy341:
 	++YYCURSOR;
-#line 433 "../src/parse/lex.re"
+#line 432 "../src/parse/lex.re"
 	{ kind = TOKEN_CZERO; goto end; }
-#line 2057 "src/parse/lex.cc"
+#line 2056 "src/parse/lex.cc"
 }
-#line 435 "../src/parse/lex.re"
+#line 434 "../src/parse/lex.re"
 
 cond:
     tok = cur;
 
-#line 2064 "src/parse/lex.cc"
+#line 2063 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -2112,14 +2111,14 @@ cond:
 	}
 yy345:
 	++YYCURSOR;
-#line 441 "../src/parse/lex.re"
+#line 440 "../src/parse/lex.re"
 	{ goto error; }
-#line 2118 "src/parse/lex.cc"
+#line 2117 "src/parse/lex.cc"
 yy347:
 	++YYCURSOR;
-#line 440 "../src/parse/lex.re"
+#line 439 "../src/parse/lex.re"
 	{ if (!cl->empty()) goto error; cl->insert("*"); goto next; }
-#line 2123 "src/parse/lex.cc"
+#line 2122 "src/parse/lex.cc"
 yy349:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -2127,15 +2126,15 @@ yy349:
 	if (yybm[0+yych] & 128) {
 		goto yy349;
 	}
-#line 439 "../src/parse/lex.re"
+#line 438 "../src/parse/lex.re"
 	{ cl->insert(getstr(tok, cur)); goto next; }
-#line 2133 "src/parse/lex.cc"
+#line 2132 "src/parse/lex.cc"
 }
-#line 442 "../src/parse/lex.re"
+#line 441 "../src/parse/lex.re"
 
 next:
 
-#line 2139 "src/parse/lex.cc"
+#line 2138 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -2186,9 +2185,9 @@ next:
 	}
 	++YYCURSOR;
 yy355:
-#line 447 "../src/parse/lex.re"
+#line 446 "../src/parse/lex.re"
 	{ goto error; }
-#line 2192 "src/parse/lex.cc"
+#line 2191 "src/parse/lex.cc"
 yy356:
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
 	if (yych <= ' ') {
@@ -2210,14 +2209,14 @@ yy357:
 	if (yybm[0+yych] & 128) {
 		goto yy357;
 	}
-#line 445 "../src/parse/lex.re"
+#line 444 "../src/parse/lex.re"
 	{ goto cond; }
-#line 2216 "src/parse/lex.cc"
+#line 2215 "src/parse/lex.cc"
 yy360:
 	++YYCURSOR;
-#line 446 "../src/parse/lex.re"
+#line 445 "../src/parse/lex.re"
 	{ goto end; }
-#line 2221 "src/parse/lex.cc"
+#line 2220 "src/parse/lex.cc"
 yy362:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -2235,7 +2234,7 @@ yy362:
 	YYCURSOR = YYMARKER;
 	goto yy355;
 }
-#line 448 "../src/parse/lex.re"
+#line 447 "../src/parse/lex.re"
 
 end:
     yylval.clist = cl;
@@ -2251,7 +2250,7 @@ void Scanner::lex_code_indented()
     tok = cur;
 code:
 
-#line 2255 "src/parse/lex.cc"
+#line 2254 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if ((YYLIMIT - YYCURSOR) < 3) YYFILL(3);
@@ -2279,15 +2278,15 @@ code:
 	}
 yy367:
 	++YYCURSOR;
-#line 471 "../src/parse/lex.re"
+#line 470 "../src/parse/lex.re"
 	{ fail_if_eof(); goto code; }
-#line 2285 "src/parse/lex.cc"
+#line 2284 "src/parse/lex.cc"
 yy369:
 	++YYCURSOR;
 yy370:
-#line 476 "../src/parse/lex.re"
+#line 475 "../src/parse/lex.re"
 	{ goto code; }
-#line 2291 "src/parse/lex.cc"
+#line 2290 "src/parse/lex.cc"
 yy371:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '\f') {
@@ -2298,23 +2297,23 @@ yy371:
 		if (yych == ' ') goto yy379;
 	}
 yy372:
-#line 464 "../src/parse/lex.re"
+#line 463 "../src/parse/lex.re"
 	{
         while (isspace(tok[0])) ++tok;
         while (cur > tok && isspace(cur[-1])) --cur;
         yylval.code = new Code(get_fname (), line, getstr(tok, cur));
         return;
     }
-#line 2309 "src/parse/lex.cc"
+#line 2308 "src/parse/lex.cc"
 yy373:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy371;
 	goto yy370;
 yy374:
 	++YYCURSOR;
-#line 475 "../src/parse/lex.re"
+#line 474 "../src/parse/lex.re"
 	{ lex_string(cur[-1]); goto code; }
-#line 2318 "src/parse/lex.cc"
+#line 2317 "src/parse/lex.cc"
 yy376:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '*') goto yy381;
@@ -2322,27 +2321,27 @@ yy376:
 	goto yy370;
 yy377:
 	++YYCURSOR;
-#line 472 "../src/parse/lex.re"
+#line 471 "../src/parse/lex.re"
 	{ fatal_l(get_line(), "Curly braces are not allowed after ':='"); }
-#line 2328 "src/parse/lex.cc"
+#line 2327 "src/parse/lex.cc"
 yy379:
 	++YYCURSOR;
 	YYCURSOR -= 1;
-#line 463 "../src/parse/lex.re"
+#line 462 "../src/parse/lex.re"
 	{ goto code; }
-#line 2334 "src/parse/lex.cc"
+#line 2333 "src/parse/lex.cc"
 yy381:
 	++YYCURSOR;
-#line 473 "../src/parse/lex.re"
+#line 472 "../src/parse/lex.re"
 	{ lex_c_comment(); goto code; }
-#line 2339 "src/parse/lex.cc"
+#line 2338 "src/parse/lex.cc"
 yy383:
 	++YYCURSOR;
-#line 474 "../src/parse/lex.re"
+#line 473 "../src/parse/lex.re"
 	{ lex_cpp_comment(); goto code; }
-#line 2344 "src/parse/lex.cc"
+#line 2343 "src/parse/lex.cc"
 }
-#line 477 "../src/parse/lex.re"
+#line 476 "../src/parse/lex.re"
 
 }
 
@@ -2352,7 +2351,7 @@ void Scanner::lex_code_in_braces()
     uint32_t depth = 1;
 code:
 
-#line 2356 "src/parse/lex.cc"
+#line 2355 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -2414,15 +2413,15 @@ code:
 	}
 yy387:
 	++YYCURSOR;
-#line 497 "../src/parse/lex.re"
+#line 496 "../src/parse/lex.re"
 	{ fail_if_eof(); goto code; }
-#line 2420 "src/parse/lex.cc"
+#line 2419 "src/parse/lex.cc"
 yy389:
 	++YYCURSOR;
 yy390:
-#line 501 "../src/parse/lex.re"
+#line 500 "../src/parse/lex.re"
 	{ goto code; }
-#line 2426 "src/parse/lex.cc"
+#line 2425 "src/parse/lex.cc"
 yy391:
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
 	if (yybm[0+yych] & 32) {
@@ -2430,18 +2429,18 @@ yy391:
 	}
 	if (yych == '#') goto yy404;
 yy392:
-#line 496 "../src/parse/lex.re"
+#line 495 "../src/parse/lex.re"
 	{ next_line(); goto code; }
-#line 2436 "src/parse/lex.cc"
+#line 2435 "src/parse/lex.cc"
 yy393:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy391;
 	goto yy390;
 yy394:
 	++YYCURSOR;
-#line 500 "../src/parse/lex.re"
+#line 499 "../src/parse/lex.re"
 	{ lex_string(cur[-1]); goto code; }
-#line 2445 "src/parse/lex.cc"
+#line 2444 "src/parse/lex.cc"
 yy396:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '*') goto yy406;
@@ -2449,12 +2448,12 @@ yy396:
 	goto yy390;
 yy397:
 	++YYCURSOR;
-#line 494 "../src/parse/lex.re"
+#line 493 "../src/parse/lex.re"
 	{ ++depth; goto code; }
-#line 2455 "src/parse/lex.cc"
+#line 2454 "src/parse/lex.cc"
 yy399:
 	++YYCURSOR;
-#line 486 "../src/parse/lex.re"
+#line 485 "../src/parse/lex.re"
 	{
         if (--depth == 0) {
             yylval.code = new Code(get_fname (), line, getstr(tok, cur));
@@ -2462,7 +2461,7 @@ yy399:
         }
         goto code;
     }
-#line 2466 "src/parse/lex.cc"
+#line 2465 "src/parse/lex.cc"
 yy401:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -2488,14 +2487,14 @@ yy404:
 	}
 yy406:
 	++YYCURSOR;
-#line 498 "../src/parse/lex.re"
+#line 497 "../src/parse/lex.re"
 	{ lex_c_comment(); goto code; }
-#line 2494 "src/parse/lex.cc"
+#line 2493 "src/parse/lex.cc"
 yy408:
 	++YYCURSOR;
-#line 499 "../src/parse/lex.re"
+#line 498 "../src/parse/lex.re"
 	{ lex_cpp_comment(); goto code; }
-#line 2499 "src/parse/lex.cc"
+#line 2498 "src/parse/lex.cc"
 yy410:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych != 'i') goto yy403;
@@ -2552,9 +2551,9 @@ yy418:
 yy420:
 	++YYCURSOR;
 	YYCURSOR = yyt1;
-#line 495 "../src/parse/lex.re"
+#line 494 "../src/parse/lex.re"
 	{ set_sourceline (); goto code; }
-#line 2558 "src/parse/lex.cc"
+#line 2557 "src/parse/lex.cc"
 yy422:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy420;
@@ -2580,7 +2579,7 @@ yy426:
 	if (yych == '\n') goto yy403;
 	goto yy423;
 }
-#line 502 "../src/parse/lex.re"
+#line 501 "../src/parse/lex.re"
 
 }
 
@@ -2588,7 +2587,7 @@ void Scanner::lex_string(char delim)
 {
 loop:
 
-#line 2592 "src/parse/lex.cc"
+#line 2591 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
@@ -2614,29 +2613,29 @@ loop:
 	}
 yy429:
 	++YYCURSOR;
-#line 512 "../src/parse/lex.re"
+#line 511 "../src/parse/lex.re"
 	{ fail_if_eof(); goto loop; }
-#line 2620 "src/parse/lex.cc"
+#line 2619 "src/parse/lex.cc"
 yy431:
 	++YYCURSOR;
 yy432:
-#line 513 "../src/parse/lex.re"
+#line 512 "../src/parse/lex.re"
 	{ goto loop; }
-#line 2626 "src/parse/lex.cc"
+#line 2625 "src/parse/lex.cc"
 yy433:
 	++YYCURSOR;
-#line 511 "../src/parse/lex.re"
+#line 510 "../src/parse/lex.re"
 	{ next_line(); goto loop; }
-#line 2631 "src/parse/lex.cc"
+#line 2630 "src/parse/lex.cc"
 yy435:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy433;
 	goto yy432;
 yy436:
 	++YYCURSOR;
-#line 509 "../src/parse/lex.re"
+#line 508 "../src/parse/lex.re"
 	{ if (cur[-1] == delim) return; else goto loop; }
-#line 2640 "src/parse/lex.cc"
+#line 2639 "src/parse/lex.cc"
 yy438:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '&') {
@@ -2647,11 +2646,11 @@ yy438:
 	}
 yy439:
 	++YYCURSOR;
-#line 510 "../src/parse/lex.re"
+#line 509 "../src/parse/lex.re"
 	{ goto loop; }
-#line 2653 "src/parse/lex.cc"
+#line 2652 "src/parse/lex.cc"
 }
-#line 514 "../src/parse/lex.re"
+#line 513 "../src/parse/lex.re"
 
 }
 
@@ -2659,7 +2658,7 @@ void Scanner::lex_c_comment()
 {
 loop:
 
-#line 2663 "src/parse/lex.cc"
+#line 2662 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
@@ -2675,20 +2674,20 @@ loop:
 	}
 yy443:
 	++YYCURSOR;
-#line 523 "../src/parse/lex.re"
+#line 522 "../src/parse/lex.re"
 	{ fail_if_eof(); goto loop; }
-#line 2681 "src/parse/lex.cc"
+#line 2680 "src/parse/lex.cc"
 yy445:
 	++YYCURSOR;
 yy446:
-#line 524 "../src/parse/lex.re"
+#line 523 "../src/parse/lex.re"
 	{ goto loop; }
-#line 2687 "src/parse/lex.cc"
+#line 2686 "src/parse/lex.cc"
 yy447:
 	++YYCURSOR;
-#line 522 "../src/parse/lex.re"
+#line 521 "../src/parse/lex.re"
 	{ next_line(); goto loop; }
-#line 2692 "src/parse/lex.cc"
+#line 2691 "src/parse/lex.cc"
 yy449:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy447;
@@ -2697,11 +2696,11 @@ yy450:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych != '/') goto yy446;
 	++YYCURSOR;
-#line 521 "../src/parse/lex.re"
+#line 520 "../src/parse/lex.re"
 	{ return; }
-#line 2703 "src/parse/lex.cc"
+#line 2702 "src/parse/lex.cc"
 }
-#line 525 "../src/parse/lex.re"
+#line 524 "../src/parse/lex.re"
 
 }
 
@@ -2709,7 +2708,7 @@ void Scanner::lex_cpp_comment()
 {
 loop:
 
-#line 2713 "src/parse/lex.cc"
+#line 2712 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
@@ -2724,26 +2723,26 @@ loop:
 	}
 yy455:
 	++YYCURSOR;
-#line 533 "../src/parse/lex.re"
+#line 532 "../src/parse/lex.re"
 	{ fail_if_eof(); goto loop; }
-#line 2730 "src/parse/lex.cc"
+#line 2729 "src/parse/lex.cc"
 yy457:
 	++YYCURSOR;
 yy458:
-#line 534 "../src/parse/lex.re"
+#line 533 "../src/parse/lex.re"
 	{ goto loop; }
-#line 2736 "src/parse/lex.cc"
+#line 2735 "src/parse/lex.cc"
 yy459:
 	++YYCURSOR;
-#line 532 "../src/parse/lex.re"
+#line 531 "../src/parse/lex.re"
 	{ next_line(); return; }
-#line 2741 "src/parse/lex.cc"
+#line 2740 "src/parse/lex.cc"
 yy461:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy459;
 	goto yy458;
 }
-#line 535 "../src/parse/lex.re"
+#line 534 "../src/parse/lex.re"
 
 }
 
@@ -2755,35 +2754,35 @@ fst:
     tok = cur;
     c = get_column();
 
-#line 2759 "src/parse/lex.cc"
+#line 2758 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = (YYCTYPE)*YYCURSOR;
 	if (yych == ']') goto yy465;
-#line 547 "../src/parse/lex.re"
+#line 546 "../src/parse/lex.re"
 	{ l = lex_cls_chr(); goto snd; }
-#line 2767 "src/parse/lex.cc"
+#line 2766 "src/parse/lex.cc"
 yy465:
 	++YYCURSOR;
-#line 546 "../src/parse/lex.re"
+#line 545 "../src/parse/lex.re"
 	{ return ast_cls(get_line(), c0, cls, neg); }
-#line 2772 "src/parse/lex.cc"
+#line 2771 "src/parse/lex.cc"
 }
-#line 548 "../src/parse/lex.re"
+#line 547 "../src/parse/lex.re"
 
 snd:
 
-#line 2778 "src/parse/lex.cc"
+#line 2777 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
 	yych = (YYCTYPE)*(YYMARKER = YYCURSOR);
 	if (yych == '-') goto yy470;
 yy469:
-#line 551 "../src/parse/lex.re"
+#line 550 "../src/parse/lex.re"
 	{ u = l; goto add; }
-#line 2787 "src/parse/lex.cc"
+#line 2786 "src/parse/lex.cc"
 yy470:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych != ']') goto yy472;
@@ -2792,7 +2791,7 @@ yy470:
 yy472:
 	++YYCURSOR;
 	YYCURSOR -= 1;
-#line 552 "../src/parse/lex.re"
+#line 551 "../src/parse/lex.re"
 	{
         u = lex_cls_chr();
         if (l > u) {
@@ -2801,9 +2800,9 @@ yy472:
         }
         goto add;
     }
-#line 2805 "src/parse/lex.cc"
+#line 2804 "src/parse/lex.cc"
 }
-#line 560 "../src/parse/lex.re"
+#line 559 "../src/parse/lex.re"
 
 add:
     cls->push_back(ASTRange(l, u, c));
@@ -2815,7 +2814,7 @@ uint32_t Scanner::lex_cls_chr()
     tok = cur;
     const uint32_t l = get_line(), c = get_column();
 
-#line 2819 "src/parse/lex.cc"
+#line 2818 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	unsigned int yyaccept = 0;
@@ -2832,20 +2831,20 @@ uint32_t Scanner::lex_cls_chr()
 	}
 yy476:
 	++YYCURSOR;
-#line 572 "../src/parse/lex.re"
+#line 571 "../src/parse/lex.re"
 	{ fail_if_eof(); return 0; }
-#line 2838 "src/parse/lex.cc"
+#line 2837 "src/parse/lex.cc"
 yy478:
 	++YYCURSOR;
 yy479:
-#line 578 "../src/parse/lex.re"
+#line 577 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>(tok[0]); }
-#line 2844 "src/parse/lex.cc"
+#line 2843 "src/parse/lex.cc"
 yy480:
 	++YYCURSOR;
-#line 573 "../src/parse/lex.re"
+#line 572 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "newline in character class"); }
-#line 2849 "src/parse/lex.cc"
+#line 2848 "src/parse/lex.cc"
 yy482:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy480;
@@ -2904,36 +2903,36 @@ yy483:
 		}
 	}
 yy484:
-#line 576 "../src/parse/lex.re"
+#line 575 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in escape sequence"); }
-#line 2910 "src/parse/lex.cc"
+#line 2909 "src/parse/lex.cc"
 yy485:
 	++YYCURSOR;
 yy486:
-#line 591 "../src/parse/lex.re"
+#line 590 "../src/parse/lex.re"
 	{
         warn.useless_escape(l, c, tok[1]);
         return static_cast<uint8_t>(tok[1]);
     }
-#line 2919 "src/parse/lex.cc"
+#line 2918 "src/parse/lex.cc"
 yy487:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy480;
 	goto yy486;
 yy488:
 	++YYCURSOR;
-#line 589 "../src/parse/lex.re"
+#line 588 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('-'); }
-#line 2928 "src/parse/lex.cc"
+#line 2927 "src/parse/lex.cc"
 yy490:
 	yyaccept = 0;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
 	if (yych <= '/') goto yy491;
 	if (yych <= '7') goto yy515;
 yy491:
-#line 575 "../src/parse/lex.re"
+#line 574 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in octal escape sequence"); }
-#line 2937 "src/parse/lex.cc"
+#line 2936 "src/parse/lex.cc"
 yy492:
 	++YYCURSOR;
 	goto yy491;
@@ -2949,9 +2948,9 @@ yy493:
 		if (yych <= 'f') goto yy517;
 	}
 yy494:
-#line 574 "../src/parse/lex.re"
+#line 573 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in hexadecimal escape sequence"); }
-#line 2955 "src/parse/lex.cc"
+#line 2954 "src/parse/lex.cc"
 yy495:
 	yyaccept = 1;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
@@ -2967,49 +2966,49 @@ yy495:
 	}
 yy496:
 	++YYCURSOR;
-#line 588 "../src/parse/lex.re"
+#line 587 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\\'); }
-#line 2973 "src/parse/lex.cc"
+#line 2972 "src/parse/lex.cc"
 yy498:
 	++YYCURSOR;
-#line 590 "../src/parse/lex.re"
+#line 589 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>(']'); }
-#line 2978 "src/parse/lex.cc"
+#line 2977 "src/parse/lex.cc"
 yy500:
 	++YYCURSOR;
-#line 581 "../src/parse/lex.re"
+#line 580 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\a'); }
-#line 2983 "src/parse/lex.cc"
+#line 2982 "src/parse/lex.cc"
 yy502:
 	++YYCURSOR;
-#line 582 "../src/parse/lex.re"
+#line 581 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\b'); }
-#line 2988 "src/parse/lex.cc"
+#line 2987 "src/parse/lex.cc"
 yy504:
 	++YYCURSOR;
-#line 583 "../src/parse/lex.re"
+#line 582 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\f'); }
-#line 2993 "src/parse/lex.cc"
+#line 2992 "src/parse/lex.cc"
 yy506:
 	++YYCURSOR;
-#line 584 "../src/parse/lex.re"
+#line 583 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\n'); }
-#line 2998 "src/parse/lex.cc"
+#line 2997 "src/parse/lex.cc"
 yy508:
 	++YYCURSOR;
-#line 585 "../src/parse/lex.re"
+#line 584 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\r'); }
-#line 3003 "src/parse/lex.cc"
+#line 3002 "src/parse/lex.cc"
 yy510:
 	++YYCURSOR;
-#line 586 "../src/parse/lex.re"
+#line 585 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\t'); }
-#line 3008 "src/parse/lex.cc"
+#line 3007 "src/parse/lex.cc"
 yy512:
 	++YYCURSOR;
-#line 587 "../src/parse/lex.re"
+#line 586 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\v'); }
-#line 3013 "src/parse/lex.cc"
+#line 3012 "src/parse/lex.cc"
 yy514:
 	yyaccept = 1;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
@@ -3072,9 +3071,9 @@ yy519:
 	}
 yy520:
 	++YYCURSOR;
-#line 580 "../src/parse/lex.re"
+#line 579 "../src/parse/lex.re"
 	{ return unesc_oct(tok, cur); }
-#line 3078 "src/parse/lex.cc"
+#line 3077 "src/parse/lex.cc"
 yy522:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '@') {
@@ -3101,9 +3100,9 @@ yy523:
 	}
 yy524:
 	++YYCURSOR;
-#line 579 "../src/parse/lex.re"
+#line 578 "../src/parse/lex.re"
 	{ return unesc_hex(tok, cur); }
-#line 3107 "src/parse/lex.cc"
+#line 3106 "src/parse/lex.cc"
 yy526:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '@') {
@@ -3127,7 +3126,7 @@ yy527:
 		goto yy516;
 	}
 }
-#line 595 "../src/parse/lex.re"
+#line 594 "../src/parse/lex.re"
 
 }
 
@@ -3137,7 +3136,7 @@ uint32_t Scanner::lex_str_chr(char quote, bool &end)
     tok = cur;
     const uint32_t l = get_line(), c = get_column();
 
-#line 3141 "src/parse/lex.cc"
+#line 3140 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	unsigned int yyaccept = 0;
@@ -3154,23 +3153,23 @@ uint32_t Scanner::lex_str_chr(char quote, bool &end)
 	}
 yy530:
 	++YYCURSOR;
-#line 605 "../src/parse/lex.re"
+#line 604 "../src/parse/lex.re"
 	{ fail_if_eof(); return 0; }
-#line 3160 "src/parse/lex.cc"
+#line 3159 "src/parse/lex.cc"
 yy532:
 	++YYCURSOR;
 yy533:
-#line 611 "../src/parse/lex.re"
+#line 610 "../src/parse/lex.re"
 	{
         end = tok[0] == quote;
         return static_cast<uint8_t>(tok[0]);
     }
-#line 3169 "src/parse/lex.cc"
+#line 3168 "src/parse/lex.cc"
 yy534:
 	++YYCURSOR;
-#line 606 "../src/parse/lex.re"
+#line 605 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "newline in character string"); }
-#line 3174 "src/parse/lex.cc"
+#line 3173 "src/parse/lex.cc"
 yy536:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy534;
@@ -3224,20 +3223,20 @@ yy537:
 		}
 	}
 yy538:
-#line 609 "../src/parse/lex.re"
+#line 608 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in escape sequence"); }
-#line 3230 "src/parse/lex.cc"
+#line 3229 "src/parse/lex.cc"
 yy539:
 	++YYCURSOR;
 yy540:
-#line 625 "../src/parse/lex.re"
+#line 624 "../src/parse/lex.re"
 	{
         if (tok[1] != quote) {
             warn.useless_escape(l, c, tok[1]);
         }
         return static_cast<uint8_t>(tok[1]);
     }
-#line 3241 "src/parse/lex.cc"
+#line 3240 "src/parse/lex.cc"
 yy541:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy534;
@@ -3248,9 +3247,9 @@ yy542:
 	if (yych <= '/') goto yy543;
 	if (yych <= '7') goto yy565;
 yy543:
-#line 608 "../src/parse/lex.re"
+#line 607 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in octal escape sequence"); }
-#line 3254 "src/parse/lex.cc"
+#line 3253 "src/parse/lex.cc"
 yy544:
 	++YYCURSOR;
 	goto yy543;
@@ -3266,9 +3265,9 @@ yy545:
 		if (yych <= 'f') goto yy567;
 	}
 yy546:
-#line 607 "../src/parse/lex.re"
+#line 606 "../src/parse/lex.re"
 	{ fatal_lc(l, c, "syntax error in hexadecimal escape sequence"); }
-#line 3272 "src/parse/lex.cc"
+#line 3271 "src/parse/lex.cc"
 yy547:
 	yyaccept = 1;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
@@ -3284,44 +3283,44 @@ yy547:
 	}
 yy548:
 	++YYCURSOR;
-#line 624 "../src/parse/lex.re"
+#line 623 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\\'); }
-#line 3290 "src/parse/lex.cc"
+#line 3289 "src/parse/lex.cc"
 yy550:
 	++YYCURSOR;
-#line 617 "../src/parse/lex.re"
+#line 616 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\a'); }
-#line 3295 "src/parse/lex.cc"
+#line 3294 "src/parse/lex.cc"
 yy552:
 	++YYCURSOR;
-#line 618 "../src/parse/lex.re"
+#line 617 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\b'); }
-#line 3300 "src/parse/lex.cc"
+#line 3299 "src/parse/lex.cc"
 yy554:
 	++YYCURSOR;
-#line 619 "../src/parse/lex.re"
+#line 618 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\f'); }
-#line 3305 "src/parse/lex.cc"
+#line 3304 "src/parse/lex.cc"
 yy556:
 	++YYCURSOR;
-#line 620 "../src/parse/lex.re"
+#line 619 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\n'); }
-#line 3310 "src/parse/lex.cc"
+#line 3309 "src/parse/lex.cc"
 yy558:
 	++YYCURSOR;
-#line 621 "../src/parse/lex.re"
+#line 620 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\r'); }
-#line 3315 "src/parse/lex.cc"
+#line 3314 "src/parse/lex.cc"
 yy560:
 	++YYCURSOR;
-#line 622 "../src/parse/lex.re"
+#line 621 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\t'); }
-#line 3320 "src/parse/lex.cc"
+#line 3319 "src/parse/lex.cc"
 yy562:
 	++YYCURSOR;
-#line 623 "../src/parse/lex.re"
+#line 622 "../src/parse/lex.re"
 	{ return static_cast<uint8_t>('\v'); }
-#line 3325 "src/parse/lex.cc"
+#line 3324 "src/parse/lex.cc"
 yy564:
 	yyaccept = 1;
 	yych = (YYCTYPE)*(YYMARKER = ++YYCURSOR);
@@ -3384,9 +3383,9 @@ yy569:
 	}
 yy570:
 	++YYCURSOR;
-#line 616 "../src/parse/lex.re"
+#line 615 "../src/parse/lex.re"
 	{ return unesc_oct(tok, cur); }
-#line 3390 "src/parse/lex.cc"
+#line 3389 "src/parse/lex.cc"
 yy572:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '@') {
@@ -3413,9 +3412,9 @@ yy573:
 	}
 yy574:
 	++YYCURSOR;
-#line 615 "../src/parse/lex.re"
+#line 614 "../src/parse/lex.re"
 	{ return unesc_hex(tok, cur); }
-#line 3419 "src/parse/lex.cc"
+#line 3418 "src/parse/lex.cc"
 yy576:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych <= '@') {
@@ -3439,7 +3438,7 @@ yy577:
 		goto yy566;
 	}
 }
-#line 631 "../src/parse/lex.re"
+#line 630 "../src/parse/lex.re"
 
 }
 
@@ -3459,7 +3458,7 @@ void Scanner::set_sourceline ()
 sourceline:
     tok = cur;
 
-#line 3463 "src/parse/lex.cc"
+#line 3462 "src/parse/lex.cc"
 {
 	YYCTYPE yych;
 	static const unsigned char yybm[] = {
@@ -3517,20 +3516,20 @@ sourceline:
 		}
 	}
 	++YYCURSOR;
-#line 667 "../src/parse/lex.re"
+#line 666 "../src/parse/lex.re"
 	{ --cur; return; }
-#line 3523 "src/parse/lex.cc"
+#line 3522 "src/parse/lex.cc"
 yy582:
 	++YYCURSOR;
 yy583:
-#line 668 "../src/parse/lex.re"
+#line 667 "../src/parse/lex.re"
 	{ goto sourceline; }
-#line 3529 "src/parse/lex.cc"
+#line 3528 "src/parse/lex.cc"
 yy584:
 	++YYCURSOR;
-#line 666 "../src/parse/lex.re"
+#line 665 "../src/parse/lex.re"
 	{ tok = cur; return; }
-#line 3534 "src/parse/lex.cc"
+#line 3533 "src/parse/lex.cc"
 yy586:
 	yych = (YYCTYPE)*++YYCURSOR;
 	if (yych == '\n') goto yy584;
@@ -3547,7 +3546,7 @@ yy588:
 	if (yybm[0+yych] & 64) {
 		goto yy588;
 	}
-#line 650 "../src/parse/lex.re"
+#line 649 "../src/parse/lex.re"
 	{
         uint32_t l;
         if (!s_to_u32_unsafe (tok, cur, l)) {
@@ -3556,7 +3555,7 @@ yy588:
         set_line(l);
         goto sourceline;
     }
-#line 3560 "src/parse/lex.cc"
+#line 3559 "src/parse/lex.cc"
 yy591:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -3573,14 +3572,14 @@ yy593:
 	goto yy583;
 yy594:
 	++YYCURSOR;
-#line 659 "../src/parse/lex.re"
+#line 658 "../src/parse/lex.re"
 	{
         std::string &name = get_input().escaped_name;
         name = getstr(tok + 1, cur - 1);
         strrreplace(name, "\\", "\\\\");
         goto sourceline;
     }
-#line 3584 "src/parse/lex.cc"
+#line 3583 "src/parse/lex.cc"
 yy596:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
@@ -3589,7 +3588,7 @@ yy596:
 	if (yych == '\n') goto yy593;
 	goto yy591;
 }
-#line 669 "../src/parse/lex.re"
+#line 668 "../src/parse/lex.re"
 
 }
 
diff --git a/re2c/bootstrap/src/parse/lex.h b/re2c/bootstrap/src/parse/lex.h
index 8a16bf7b..a94c45e1 100644
--- a/re2c/bootstrap/src/parse/lex.h
+++ b/re2c/bootstrap/src/parse/lex.h
@@ -1,4 +1,4 @@
-/* Generated by re2c 1.1.1 on Thu Jan 10 23:17:36 2019 */
+/* Generated by re2c 1.1.1 on Thu Jan 17 22:27:03 2019 */
 
 #include <string.h>
 #include "src/util/forbid_copy.h"
diff --git a/re2c/src/parse/lex.re b/re2c/src/parse/lex.re
index f8bc2ea4..0c0c06aa 100644
--- a/re2c/src/parse/lex.re
+++ b/re2c/src/parse/lex.re
@@ -365,13 +365,12 @@ scan:
             return TOKEN_FID;
         }
         else {
+            // consume one character, otherwise we risk breaking operator
+            // precedence in cases like ab*: it should be a(b)*, not (ab)*
+            cur = tok + 1;
+
             std::vector<ASTChar> *str = new std::vector<ASTChar>;
-            for (const char *s = tok; s < cur; ++s) {
-                const uint32_t
-                    chr = static_cast<uint8_t>(*s),
-                    col = static_cast<uint32_t>(s - tok);
-                str->push_back(ASTChar(chr, col));
-            }
+            str->push_back(ASTChar(static_cast<uint8_t>(tok[0]), 0));
             yylval.regexp = ast_str(get_line(), get_column(), str, false);
             return TOKEN_REGEXP;
         }
diff --git a/re2c/test/posix_captures/.dat/other.dat b/re2c/test/posix_captures/.dat/other.dat
index 261682b2..e7c2ecfa 100644
--- a/re2c/test/posix_captures/.dat/other.dat
+++ b/re2c/test/posix_captures/.dat/other.dat
@@ -12,7 +12,7 @@ a*|(a|aa)*	aa	(0,2)(?,?)
 (a|aa)*|a*	aa	(0,2)(0,2)
 
 (aa*|aaa*)*		aaaaaa		(0,6)(0,6)
-(aa*|aaa*)(aa*|aaa*)	aaaaaa		(0,6)(0,6)(6,6)
+(aa*|aaa*)(aa*|aaa*)	aaaaaa		(0,6)(0,5)(5,6)
 (aa)*|(aaa)*		aaaaaa		(0,6)(4,6)(?,?)
 
 (X|Xa|Xab|Xaba|abab|baba|bY|Y)*		XY		(0,2)(1,2)
@@ -67,3 +67,8 @@ SAME		yyy	(0,3)(2,3)
 
 (y|(x?)){1,3}	y	(0,1)(0,1)(?,?)
 (y[y]?){3}	yyyy	(0,4)(3,4)
+
+(aa*|aaa*){2}			aaaaaa		(0,6)(5,6)
+((aa)*|(aaa)*)((aa)*|(aaa)*)	aaaaaa		(0,6)(0,6)(4,6)(?,?)(6,6)(?,?)(?,?)
+((aa)*|(aaa)*){2}		aaaaaa		(0,6)(6,6)(?,?)(?,?)
+
diff --git a/re2c/test/posix_captures/glennfowler/21.i--flex-syntax.c b/re2c/test/posix_captures/glennfowler/21.i--flex-syntax.c
index 10190d56..553e96c3 100644
--- a/re2c/test/posix_captures/glennfowler/21.i--flex-syntax.c
+++ b/re2c/test/posix_captures/glennfowler/21.i--flex-syntax.c
@@ -2,16 +2,12 @@
 
 {
 	YYCTYPE yych;
-	unsigned int yyaccept = 0;
 	if ((YYLIMIT - YYCURSOR) < 4) YYFILL(4);
 	yych = *(YYMARKER = YYCURSOR);
 	switch (yych) {
 	case 'a':
-		yyt1 = yyt3 = YYCURSOR;
+		yyt1 = YYCURSOR;
 		goto yy3;
-	case 'b':
-		yyt1 = yyt3 = YYCURSOR;
-		goto yy5;
 	default:	goto yy2;
 	}
 yy2:
@@ -20,14 +16,19 @@ yy2:
 	yypmatch[1] = YYCURSOR;
 	{}
 yy3:
-	yyaccept = 1;
-	yych = *(YYMARKER = ++YYCURSOR);
-	yyt2 = yyt3;
+	yych = *++YYCURSOR;
 	switch (yych) {
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
 	case 'b':	goto yy7;
 	default:	goto yy4;
 	}
 yy4:
+	YYCURSOR = YYMARKER;
+	goto yy2;
+yy5:
+	++YYCURSOR;
 	yynmatch = 3;
 	yypmatch[2] = yyt1;
 	yypmatch[4] = yyt2;
@@ -36,34 +37,23 @@ yy4:
 	yypmatch[3] = yyt2;
 	yypmatch[5] = YYCURSOR;
 	{}
-yy5:
-	yych = *++YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy8;
-	default:	goto yy6;
-	}
-yy6:
-	YYCURSOR = YYMARKER;
-	if (yyaccept == 0) {
-		goto yy2;
-	} else {
-		goto yy4;
-	}
 yy7:
 	yych = *++YYCURSOR;
 	switch (yych) {
 	case 'a':
-		yyt3 = YYCURSOR;
-		goto yy8;
-	case 'b':
-		yyt3 = YYCURSOR;
+		yyt2 = YYCURSOR;
 		goto yy5;
-	default:	goto yy6;
+	case 'b':
+		yyt2 = YYCURSOR;
+		goto yy8;
+	default:	goto yy4;
 	}
 yy8:
-	++YYCURSOR;
-	yyt2 = yyt3;
-	goto yy4;
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:	goto yy4;
+	}
 }
 
 re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
diff --git a/re2c/test/posix_captures/other/09.i--flex-syntax--posix-closure(gtop).c b/re2c/test/posix_captures/other/09.i--flex-syntax--posix-closure(gtop).c
index e7f0902d..73cabb86 100644
--- a/re2c/test/posix_captures/other/09.i--flex-syntax--posix-closure(gtop).c
+++ b/re2c/test/posix_captures/other/09.i--flex-syntax--posix-closure(gtop).c
@@ -2,14 +2,15 @@
 
 {
 	YYCTYPE yych;
-	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
-	yych = *(YYMARKER = YYCURSOR);
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
 	switch (yych) {
 	case 'a':
 		yyt1 = yyt2 = YYCURSOR;
 		goto yy3;
 	default:
-		yyt1 = yyt2 = yyt3 = YYCURSOR;
+		yyt2 = yyt3 = NULL;
+		yyt1 = YYCURSOR;
 		goto yy2;
 	}
 yy2:
@@ -20,75 +21,12 @@ yy2:
 	yypmatch[1] = YYCURSOR;
 	{}
 yy3:
-	yych = *++YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy5;
-	default:	goto yy4;
-	}
-yy4:
-	YYCURSOR = YYMARKER;
-	yyt1 = yyt2 = yyt3 = YYCURSOR;
-	goto yy2;
-yy5:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy6;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy6:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	yyt3 = YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy7;
-	default:	goto yy2;
-	}
-yy7:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':
-		yyt4 = YYCURSOR;
-		goto yy8;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy8:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy9;
-	default:
-		yyt2 = yyt3;
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy9:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy10;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy10:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = *YYCURSOR;
 	switch (yych) {
-	case 'a':	goto yy5;
+	case 'a':	goto yy3;
 	default:
-		yyt2 = yyt4;
 		yyt3 = YYCURSOR;
 		goto yy2;
 	}
diff --git a/re2c/test/posix_captures/other/09.i--flex-syntax.c b/re2c/test/posix_captures/other/09.i--flex-syntax.c
index e7f0902d..73cabb86 100644
--- a/re2c/test/posix_captures/other/09.i--flex-syntax.c
+++ b/re2c/test/posix_captures/other/09.i--flex-syntax.c
@@ -2,14 +2,15 @@
 
 {
 	YYCTYPE yych;
-	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
-	yych = *(YYMARKER = YYCURSOR);
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
 	switch (yych) {
 	case 'a':
 		yyt1 = yyt2 = YYCURSOR;
 		goto yy3;
 	default:
-		yyt1 = yyt2 = yyt3 = YYCURSOR;
+		yyt2 = yyt3 = NULL;
+		yyt1 = YYCURSOR;
 		goto yy2;
 	}
 yy2:
@@ -20,75 +21,12 @@ yy2:
 	yypmatch[1] = YYCURSOR;
 	{}
 yy3:
-	yych = *++YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy5;
-	default:	goto yy4;
-	}
-yy4:
-	YYCURSOR = YYMARKER;
-	yyt1 = yyt2 = yyt3 = YYCURSOR;
-	goto yy2;
-yy5:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy6;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy6:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	yyt3 = YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy7;
-	default:	goto yy2;
-	}
-yy7:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':
-		yyt4 = YYCURSOR;
-		goto yy8;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy8:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy9;
-	default:
-		yyt2 = yyt3;
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy9:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy10;
-	default:
-		yyt3 = YYCURSOR;
-		goto yy2;
-	}
-yy10:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = *YYCURSOR;
 	switch (yych) {
-	case 'a':	goto yy5;
+	case 'a':	goto yy3;
 	default:
-		yyt2 = yyt4;
 		yyt3 = YYCURSOR;
 		goto yy2;
 	}
diff --git a/re2c/test/posix_captures/other/10.i--flex-syntax--posix-closure(gtop).c b/re2c/test/posix_captures/other/10.i--flex-syntax--posix-closure(gtop).c
index 25e6925b..f649c238 100644
--- a/re2c/test/posix_captures/other/10.i--flex-syntax--posix-closure(gtop).c
+++ b/re2c/test/posix_captures/other/10.i--flex-syntax--posix-closure(gtop).c
@@ -8,90 +8,43 @@
 	case 'a':
 		yyt1 = YYCURSOR;
 		goto yy3;
-	default:
-		yyt1 = yyt2 = YYCURSOR;
-		goto yy2;
+	default:	goto yy2;
 	}
 yy2:
-	yynmatch = 3;
-	yypmatch[2] = yyt1;
-	yypmatch[4] = yyt2;
-	yypmatch[0] = yyt1;
+	yynmatch = 1;
+	yypmatch[0] = YYCURSOR;
 	yypmatch[1] = YYCURSOR;
-	yypmatch[3] = yyt2;
-	yypmatch[5] = YYCURSOR;
 	{}
 yy3:
 	yych = *++YYCURSOR;
 	switch (yych) {
-	case 'a':	goto yy5;
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
 	default:	goto yy4;
 	}
 yy4:
 	YYCURSOR = YYMARKER;
-	yyt1 = yyt2 = YYCURSOR;
 	goto yy2;
 yy5:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy6;
-	default:
-		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy6:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	yyt2 = YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy7;
-	default:	goto yy2;
-	}
-yy7:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = *YYCURSOR;
 	switch (yych) {
 	case 'a':
-		yyt3 = YYCURSOR;
-		goto yy8;
-	default:
-		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy8:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy9;
-	default:	goto yy2;
-	}
-yy9:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy10;
-	default:
 		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy10:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy5;
-	default:
-		yyt2 = yyt3;
-		goto yy2;
+		goto yy5;
+	default:	goto yy7;
 	}
+yy7:
+	yynmatch = 3;
+	yypmatch[2] = yyt1;
+	yypmatch[4] = yyt2;
+	yypmatch[0] = yyt1;
+	yypmatch[1] = YYCURSOR;
+	yypmatch[3] = yyt2;
+	yypmatch[5] = YYCURSOR;
+	{}
 }
 
-re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
 re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
-re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/10.i--flex-syntax.c b/re2c/test/posix_captures/other/10.i--flex-syntax.c
index 25e6925b..f649c238 100644
--- a/re2c/test/posix_captures/other/10.i--flex-syntax.c
+++ b/re2c/test/posix_captures/other/10.i--flex-syntax.c
@@ -8,90 +8,43 @@
 	case 'a':
 		yyt1 = YYCURSOR;
 		goto yy3;
-	default:
-		yyt1 = yyt2 = YYCURSOR;
-		goto yy2;
+	default:	goto yy2;
 	}
 yy2:
-	yynmatch = 3;
-	yypmatch[2] = yyt1;
-	yypmatch[4] = yyt2;
-	yypmatch[0] = yyt1;
+	yynmatch = 1;
+	yypmatch[0] = YYCURSOR;
 	yypmatch[1] = YYCURSOR;
-	yypmatch[3] = yyt2;
-	yypmatch[5] = YYCURSOR;
 	{}
 yy3:
 	yych = *++YYCURSOR;
 	switch (yych) {
-	case 'a':	goto yy5;
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
 	default:	goto yy4;
 	}
 yy4:
 	YYCURSOR = YYMARKER;
-	yyt1 = yyt2 = YYCURSOR;
 	goto yy2;
 yy5:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy6;
-	default:
-		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy6:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	yyt2 = YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy7;
-	default:	goto yy2;
-	}
-yy7:
 	++YYCURSOR;
 	if (YYLIMIT <= YYCURSOR) YYFILL(1);
 	yych = *YYCURSOR;
 	switch (yych) {
 	case 'a':
-		yyt3 = YYCURSOR;
-		goto yy8;
-	default:
-		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy8:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy9;
-	default:	goto yy2;
-	}
-yy9:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy10;
-	default:
 		yyt2 = YYCURSOR;
-		goto yy2;
-	}
-yy10:
-	++YYCURSOR;
-	if (YYLIMIT <= YYCURSOR) YYFILL(1);
-	yych = *YYCURSOR;
-	switch (yych) {
-	case 'a':	goto yy5;
-	default:
-		yyt2 = yyt3;
-		goto yy2;
+		goto yy5;
+	default:	goto yy7;
 	}
+yy7:
+	yynmatch = 3;
+	yypmatch[2] = yyt1;
+	yypmatch[4] = yyt2;
+	yypmatch[0] = yyt1;
+	yypmatch[1] = YYCURSOR;
+	yypmatch[3] = yyt2;
+	yypmatch[5] = YYCURSOR;
+	{}
 }
 
-re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
 re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
-re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).c b/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).c
new file mode 100644
index 00000000..b5ed4c7d
--- /dev/null
+++ b/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).c
@@ -0,0 +1,50 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt1 = YYCURSOR;
+		goto yy3;
+	default:	goto yy2;
+	}
+yy2:
+	yynmatch = 1;
+	yypmatch[0] = YYCURSOR;
+	yypmatch[1] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
+	default:
+		yyt3 = YYCURSOR;
+		goto yy7;
+	}
+yy7:
+	yynmatch = 2;
+	yypmatch[0] = yyt1;
+	yypmatch[2] = yyt2;
+	yypmatch[3] = yyt3;
+	yypmatch[1] = YYCURSOR;
+	{}
+}
+
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
diff --git a/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).re b/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).re
new file mode 100644
index 00000000..d95a56b9
--- /dev/null
+++ b/re2c/test/posix_captures/other/27.i--flex-syntax--posix-closure(gtop).re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    (aa*|aaa*){2}
+    {}
+    "" {}
+*/
diff --git a/re2c/test/posix_captures/other/27.i--flex-syntax.c b/re2c/test/posix_captures/other/27.i--flex-syntax.c
new file mode 100644
index 00000000..b5ed4c7d
--- /dev/null
+++ b/re2c/test/posix_captures/other/27.i--flex-syntax.c
@@ -0,0 +1,50 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt1 = YYCURSOR;
+		goto yy3;
+	default:	goto yy2;
+	}
+yy2:
+	yynmatch = 1;
+	yypmatch[0] = YYCURSOR;
+	yypmatch[1] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = YYCURSOR;
+		goto yy5;
+	default:
+		yyt3 = YYCURSOR;
+		goto yy7;
+	}
+yy7:
+	yynmatch = 2;
+	yypmatch[0] = yyt1;
+	yypmatch[2] = yyt2;
+	yypmatch[3] = yyt3;
+	yypmatch[1] = YYCURSOR;
+	{}
+}
+
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
diff --git a/re2c/test/posix_captures/other/27.i--flex-syntax.re b/re2c/test/posix_captures/other/27.i--flex-syntax.re
new file mode 100644
index 00000000..d95a56b9
--- /dev/null
+++ b/re2c/test/posix_captures/other/27.i--flex-syntax.re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    (aa*|aaa*){2}
+    {}
+    "" {}
+*/
diff --git a/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).c b/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).c
new file mode 100644
index 00000000..749cf238
--- /dev/null
+++ b/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).c
@@ -0,0 +1,132 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt3 = NULL;
+		yyt1 = yyt2 = yyt9 = YYCURSOR;
+		goto yy3;
+	default:
+		yyt2 = yyt3 = yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt1 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy2:
+	yynmatch = 7;
+	yypmatch[2] = yyt1;
+	yypmatch[4] = yyt2;
+	yypmatch[5] = yyt3;
+	yypmatch[6] = yyt9;
+	yypmatch[7] = yyt4;
+	yypmatch[8] = yyt5;
+	yypmatch[10] = yyt6;
+	yypmatch[11] = yyt7;
+	yypmatch[12] = yyt8;
+	yypmatch[13] = yyt10;
+	yypmatch[0] = yyt1;
+	yypmatch[1] = YYCURSOR;
+	yypmatch[3] = yyt5;
+	yypmatch[9] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	yyt2 = yyt3 = yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+	yyt1 = yyt5 = YYCURSOR;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt10 = YYCURSOR;
+		goto yy6;
+	default:
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy6:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt4 = yyt5 = yyt6 = YYCURSOR;
+		goto yy7;
+	default:
+		yyt2 = yyt3;
+		yyt6 = yyt7 = yyt8 = yyt10 = NULL;
+		yyt4 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy7:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt7 = NULL;
+		yyt2 = yyt8 = YYCURSOR;
+		goto yy8;
+	default:
+		yyt2 = yyt10;
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy8:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy9;
+	default:
+		yyt2 = yyt3;
+		yyt8 = yyt10 = NULL;
+		yyt7 = YYCURSOR;
+		goto yy2;
+	}
+yy9:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = yyt9 = YYCURSOR;
+		goto yy10;
+	default:
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy10:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:
+		yyt2 = yyt10;
+		yyt3 = yyt8;
+		yyt4 = yyt7;
+		yyt5 = yyt8;
+		yyt6 = yyt7;
+		yyt9 = yyt7;
+		yyt10 = YYCURSOR;
+		goto yy2;
+	}
+}
+
+re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).re b/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).re
new file mode 100644
index 00000000..99ead951
--- /dev/null
+++ b/re2c/test/posix_captures/other/28.i--flex-syntax--posix-closure(gtop).re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    ((aa)*|(aaa)*)((aa)*|(aaa)*)
+    {}
+    "" {}
+*/
diff --git a/re2c/test/posix_captures/other/28.i--flex-syntax.c b/re2c/test/posix_captures/other/28.i--flex-syntax.c
new file mode 100644
index 00000000..749cf238
--- /dev/null
+++ b/re2c/test/posix_captures/other/28.i--flex-syntax.c
@@ -0,0 +1,132 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt3 = NULL;
+		yyt1 = yyt2 = yyt9 = YYCURSOR;
+		goto yy3;
+	default:
+		yyt2 = yyt3 = yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt1 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy2:
+	yynmatch = 7;
+	yypmatch[2] = yyt1;
+	yypmatch[4] = yyt2;
+	yypmatch[5] = yyt3;
+	yypmatch[6] = yyt9;
+	yypmatch[7] = yyt4;
+	yypmatch[8] = yyt5;
+	yypmatch[10] = yyt6;
+	yypmatch[11] = yyt7;
+	yypmatch[12] = yyt8;
+	yypmatch[13] = yyt10;
+	yypmatch[0] = yyt1;
+	yypmatch[1] = YYCURSOR;
+	yypmatch[3] = yyt5;
+	yypmatch[9] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	yyt2 = yyt3 = yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+	yyt1 = yyt5 = YYCURSOR;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt10 = YYCURSOR;
+		goto yy6;
+	default:
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy6:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt4 = yyt5 = yyt6 = YYCURSOR;
+		goto yy7;
+	default:
+		yyt2 = yyt3;
+		yyt6 = yyt7 = yyt8 = yyt10 = NULL;
+		yyt4 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy7:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt7 = NULL;
+		yyt2 = yyt8 = YYCURSOR;
+		goto yy8;
+	default:
+		yyt2 = yyt10;
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy8:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy9;
+	default:
+		yyt2 = yyt3;
+		yyt8 = yyt10 = NULL;
+		yyt7 = YYCURSOR;
+		goto yy2;
+	}
+yy9:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = yyt9 = YYCURSOR;
+		goto yy10;
+	default:
+		yyt4 = yyt6 = yyt7 = yyt8 = yyt9 = yyt10 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy10:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:
+		yyt2 = yyt10;
+		yyt3 = yyt8;
+		yyt4 = yyt7;
+		yyt5 = yyt8;
+		yyt6 = yyt7;
+		yyt9 = yyt7;
+		yyt10 = YYCURSOR;
+		goto yy2;
+	}
+}
+
+re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/28.i--flex-syntax.re b/re2c/test/posix_captures/other/28.i--flex-syntax.re
new file mode 100644
index 00000000..99ead951
--- /dev/null
+++ b/re2c/test/posix_captures/other/28.i--flex-syntax.re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    ((aa)*|(aaa)*)((aa)*|(aaa)*)
+    {}
+    "" {}
+*/
diff --git a/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).c b/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).c
new file mode 100644
index 00000000..e7d20593
--- /dev/null
+++ b/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).c
@@ -0,0 +1,114 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt1 = YYCURSOR;
+		goto yy3;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt1 = yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy2:
+	yynmatch = 4;
+	yypmatch[0] = yyt1;
+	yypmatch[2] = yyt2;
+	yypmatch[3] = yyt3;
+	yypmatch[4] = yyt4;
+	yypmatch[5] = yyt5;
+	yypmatch[6] = yyt6;
+	yypmatch[7] = yyt7;
+	yypmatch[1] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+	yyt1 = yyt2 = yyt3 = YYCURSOR;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy6;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy6:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = yyt4 = YYCURSOR;
+		goto yy7;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy7:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt5 = yyt7 = NULL;
+		yyt3 = yyt6 = YYCURSOR;
+		goto yy8;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy8:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy9;
+	default:
+		yyt6 = yyt7 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy9:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy10;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy10:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:
+		yyt2 = yyt3;
+		yyt4 = yyt7;
+		yyt3 = yyt7 = YYCURSOR;
+		goto yy2;
+	}
+}
+
+re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).re b/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).re
new file mode 100644
index 00000000..93744626
--- /dev/null
+++ b/re2c/test/posix_captures/other/29.i--flex-syntax--posix-closure(gtop).re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    ((aa)*|(aaa)*){2}
+    {}
+    "" {}
+*/
diff --git a/re2c/test/posix_captures/other/29.i--flex-syntax.c b/re2c/test/posix_captures/other/29.i--flex-syntax.c
new file mode 100644
index 00000000..e7d20593
--- /dev/null
+++ b/re2c/test/posix_captures/other/29.i--flex-syntax.c
@@ -0,0 +1,114 @@
+/* Generated by re2c */
+
+{
+	YYCTYPE yych;
+	if ((YYLIMIT - YYCURSOR) < 2) YYFILL(2);
+	yych = *(YYMARKER = YYCURSOR);
+	switch (yych) {
+	case 'a':
+		yyt1 = YYCURSOR;
+		goto yy3;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt1 = yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy2:
+	yynmatch = 4;
+	yypmatch[0] = yyt1;
+	yypmatch[2] = yyt2;
+	yypmatch[3] = yyt3;
+	yypmatch[4] = yyt4;
+	yypmatch[5] = yyt5;
+	yypmatch[6] = yyt6;
+	yypmatch[7] = yyt7;
+	yypmatch[1] = YYCURSOR;
+	{}
+yy3:
+	yych = *++YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:	goto yy4;
+	}
+yy4:
+	YYCURSOR = YYMARKER;
+	yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+	yyt1 = yyt2 = yyt3 = YYCURSOR;
+	goto yy2;
+yy5:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy6;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy6:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt2 = yyt4 = YYCURSOR;
+		goto yy7;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy7:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':
+		yyt5 = yyt7 = NULL;
+		yyt3 = yyt6 = YYCURSOR;
+		goto yy8;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy8:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy9;
+	default:
+		yyt6 = yyt7 = NULL;
+		yyt3 = yyt5 = YYCURSOR;
+		goto yy2;
+	}
+yy9:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy10;
+	default:
+		yyt4 = yyt5 = yyt6 = yyt7 = NULL;
+		yyt2 = yyt3 = YYCURSOR;
+		goto yy2;
+	}
+yy10:
+	++YYCURSOR;
+	if (YYLIMIT <= YYCURSOR) YYFILL(1);
+	yych = *YYCURSOR;
+	switch (yych) {
+	case 'a':	goto yy5;
+	default:
+		yyt2 = yyt3;
+		yyt4 = yyt7;
+		yyt3 = yyt7 = YYCURSOR;
+		goto yy2;
+	}
+}
+
+re2c: warning: line 5: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: rule matches empty string [-Wmatch-empty-string]
+re2c: warning: line 6: unreachable rule (shadowed by rule at line 5) [-Wunreachable-rules]
diff --git a/re2c/test/posix_captures/other/29.i--flex-syntax.re b/re2c/test/posix_captures/other/29.i--flex-syntax.re
new file mode 100644
index 00000000..93744626
--- /dev/null
+++ b/re2c/test/posix_captures/other/29.i--flex-syntax.re
@@ -0,0 +1,7 @@
+/*!re2c
+    re2c:flags:posix-captures = 1;
+
+    ((aa)*|(aaa)*){2}
+    {}
+    "" {}
+*/