From 27c0d9b54abaa4112d5a317b8aa78b39ad60a808 Mon Sep 17 00:00:00 2001 From: Shantanu Date: Mon, 11 May 2020 14:53:58 -0700 Subject: bpo-40334: produce specialized errors for invalid del targets (GH-19911) --- Grammar/python.gram | 13 +- Lib/test/test_grammar.py | 17 ++ Lib/test/test_syntax.py | 41 ++++- Parser/pegen/parse.c | 462 ++++++++++++++++++++++++++++++----------------- 4 files changed, 352 insertions(+), 181 deletions(-) diff --git a/Grammar/python.gram b/Grammar/python.gram index 574e1e1..0542107 100644 --- a/Grammar/python.gram +++ b/Grammar/python.gram @@ -583,15 +583,19 @@ ann_assign_subscript_attribute_target[expr_ty]: | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Store, EXTRA) } del_targets[asdl_seq*]: a=','.del_target+ [','] { a } +# The lookaheads to del_target_end ensure that we don't match expressions where a prefix of the +# expression matches our rule, thereby letting these cases fall through to invalid_del_target. del_target[expr_ty] (memo): - | a=t_primary '.' b=NAME !t_lookahead { _Py_Attribute(a, b->v.Name.id, Del, EXTRA) } - | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Del, EXTRA) } + | a=t_primary '.' b=NAME &del_target_end { _Py_Attribute(a, b->v.Name.id, Del, EXTRA) } + | a=t_primary '[' b=slices ']' &del_target_end { _Py_Subscript(a, b, Del, EXTRA) } | del_t_atom del_t_atom[expr_ty]: - | a=NAME { _PyPegen_set_expr_context(p, a, Del) } + | a=NAME &del_target_end { _PyPegen_set_expr_context(p, a, Del) } | '(' a=del_target ')' { _PyPegen_set_expr_context(p, a, Del) } | '(' a=[del_targets] ')' { _Py_Tuple(a, Del, EXTRA) } | '[' a=[del_targets] ']' { _Py_List(a, Del, EXTRA) } + | invalid_del_target +del_target_end: ')' | ']' | ',' | ';' | NEWLINE targets[asdl_seq*]: a=','.target+ [','] { a } target[expr_ty] (memo): @@ -649,3 +653,6 @@ invalid_lambda_star_etc: invalid_double_type_comments: | TYPE_COMMENT NEWLINE TYPE_COMMENT NEWLINE INDENT { RAISE_SYNTAX_ERROR("Cannot have two type comments on def") } +invalid_del_target: + | a=star_expression &del_target_end { + RAISE_SYNTAX_ERROR("cannot delete %s", _PyPegen_get_expr_name(a)) } diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py index c24d352..02ba8a8 100644 --- a/Lib/test/test_grammar.py +++ b/Lib/test/test_grammar.py @@ -801,6 +801,23 @@ class GrammarTests(unittest.TestCase): del abc del x, y, (z, xyz) + x, y, z = "xyz" + del x + del y, + del (z) + del () + + a, b, c, d, e, f, g = "abcdefg" + del a, (b, c), (d, (e, f)) + + a, b, c, d, e, f, g = "abcdefg" + del a, [b, c], (d, [e, f]) + + abcd = list("abcd") + del abcd[1:2] + + compile("del a, (b[0].c, (d.e, f.g[1:2])), [h.i.j], ()", "", "exec") + def test_pass_stmt(self): # 'pass' pass diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py index 0c0fc48..06636ae 100644 --- a/Lib/test/test_syntax.py +++ b/Lib/test/test_syntax.py @@ -63,10 +63,9 @@ SyntaxError: cannot assign to __debug__ Traceback (most recent call last): SyntaxError: cannot assign to function call -# Pegen does not support this yet -# >>> del f() -# Traceback (most recent call last): -# SyntaxError: cannot delete function call +>>> del f() +Traceback (most recent call last): +SyntaxError: cannot delete function call >>> a + 1 = 2 Traceback (most recent call last): @@ -665,7 +664,7 @@ class SyntaxTestCase(unittest.TestCase): self.fail("SyntaxError is not a %s" % subclass.__name__) mo = re.search(errtext, str(err)) if mo is None: - self.fail("SyntaxError did not contain '%r'" % (errtext,)) + self.fail("SyntaxError did not contain %r" % (errtext,)) self.assertEqual(err.filename, filename) if lineno is not None: self.assertEqual(err.lineno, lineno) @@ -677,10 +676,36 @@ class SyntaxTestCase(unittest.TestCase): def test_assign_call(self): self._check_error("f() = 1", "assign") - @support.skip_if_new_parser("Pegen does not produce a specialized error " - "message yet") def test_assign_del(self): - self._check_error("del f()", "delete") + self._check_error("del (,)", "invalid syntax") + self._check_error("del 1", "delete literal") + self._check_error("del (1, 2)", "delete literal") + self._check_error("del None", "delete None") + self._check_error("del *x", "delete starred") + self._check_error("del (*x)", "delete starred") + self._check_error("del (*x,)", "delete starred") + self._check_error("del [*x,]", "delete starred") + self._check_error("del f()", "delete function call") + self._check_error("del f(a, b)", "delete function call") + self._check_error("del o.f()", "delete function call") + self._check_error("del a[0]()", "delete function call") + self._check_error("del x, f()", "delete function call") + self._check_error("del f(), x", "delete function call") + self._check_error("del [a, b, ((c), (d,), e.f())]", "delete function call") + self._check_error("del (a if True else b)", "delete conditional") + self._check_error("del +a", "delete operator") + self._check_error("del a, +b", "delete operator") + self._check_error("del a + b", "delete operator") + self._check_error("del (a + b, c)", "delete operator") + self._check_error("del (c[0], a + b)", "delete operator") + self._check_error("del a.b.c + 2", "delete operator") + self._check_error("del a.b.c[0] + 2", "delete operator") + self._check_error("del (a, b, (c, d.e.f + 2))", "delete operator") + self._check_error("del [a, b, (c, d.e.f[0] + 2)]", "delete operator") + self._check_error("del (a := 5)", "delete named expression") + # We don't have a special message for this, but make sure we don't + # report "cannot delete name" + self._check_error("del a += b", "invalid syntax") def test_global_param_err_first(self): source = """if 1: diff --git a/Parser/pegen/parse.c b/Parser/pegen/parse.c index 27feda7..a1a6f4c 100644 --- a/Parser/pegen/parse.c +++ b/Parser/pegen/parse.c @@ -204,168 +204,170 @@ static KeywordToken *reserved_keywords[] = { #define del_targets_type 1133 #define del_target_type 1134 #define del_t_atom_type 1135 -#define targets_type 1136 -#define target_type 1137 -#define t_primary_type 1138 // Left-recursive -#define t_lookahead_type 1139 -#define t_atom_type 1140 -#define incorrect_arguments_type 1141 -#define invalid_kwarg_type 1142 -#define invalid_named_expression_type 1143 -#define invalid_assignment_type 1144 -#define invalid_block_type 1145 -#define invalid_comprehension_type 1146 -#define invalid_parameters_type 1147 -#define invalid_star_etc_type 1148 -#define invalid_lambda_star_etc_type 1149 -#define invalid_double_type_comments_type 1150 -#define _loop0_1_type 1151 -#define _loop0_2_type 1152 -#define _loop0_4_type 1153 -#define _gather_3_type 1154 -#define _loop0_6_type 1155 -#define _gather_5_type 1156 -#define _loop0_8_type 1157 -#define _gather_7_type 1158 -#define _loop0_10_type 1159 -#define _gather_9_type 1160 -#define _loop1_11_type 1161 -#define _loop0_13_type 1162 -#define _gather_12_type 1163 -#define _tmp_14_type 1164 -#define _tmp_15_type 1165 -#define _tmp_16_type 1166 -#define _tmp_17_type 1167 -#define _tmp_18_type 1168 -#define _tmp_19_type 1169 -#define _tmp_20_type 1170 -#define _tmp_21_type 1171 -#define _loop1_22_type 1172 -#define _tmp_23_type 1173 -#define _tmp_24_type 1174 -#define _loop0_26_type 1175 -#define _gather_25_type 1176 -#define _loop0_28_type 1177 -#define _gather_27_type 1178 -#define _tmp_29_type 1179 -#define _loop0_30_type 1180 -#define _loop1_31_type 1181 -#define _loop0_33_type 1182 -#define _gather_32_type 1183 -#define _tmp_34_type 1184 -#define _loop0_36_type 1185 -#define _gather_35_type 1186 -#define _tmp_37_type 1187 -#define _loop0_39_type 1188 -#define _gather_38_type 1189 -#define _loop0_41_type 1190 -#define _gather_40_type 1191 -#define _loop0_43_type 1192 -#define _gather_42_type 1193 -#define _loop0_45_type 1194 -#define _gather_44_type 1195 -#define _tmp_46_type 1196 -#define _loop1_47_type 1197 -#define _tmp_48_type 1198 -#define _tmp_49_type 1199 -#define _tmp_50_type 1200 -#define _tmp_51_type 1201 -#define _tmp_52_type 1202 -#define _loop0_53_type 1203 -#define _loop0_54_type 1204 -#define _loop0_55_type 1205 -#define _loop1_56_type 1206 -#define _loop0_57_type 1207 -#define _loop1_58_type 1208 -#define _loop1_59_type 1209 -#define _loop1_60_type 1210 -#define _loop0_61_type 1211 -#define _loop1_62_type 1212 -#define _loop0_63_type 1213 -#define _loop1_64_type 1214 -#define _loop0_65_type 1215 -#define _loop1_66_type 1216 -#define _loop1_67_type 1217 -#define _tmp_68_type 1218 -#define _loop0_70_type 1219 -#define _gather_69_type 1220 -#define _loop1_71_type 1221 -#define _loop0_73_type 1222 -#define _gather_72_type 1223 -#define _loop1_74_type 1224 -#define _loop0_75_type 1225 -#define _loop0_76_type 1226 -#define _loop0_77_type 1227 -#define _loop1_78_type 1228 -#define _loop0_79_type 1229 -#define _loop1_80_type 1230 -#define _loop1_81_type 1231 -#define _loop1_82_type 1232 -#define _loop0_83_type 1233 -#define _loop1_84_type 1234 -#define _loop0_85_type 1235 -#define _loop1_86_type 1236 -#define _loop0_87_type 1237 -#define _loop1_88_type 1238 -#define _loop1_89_type 1239 -#define _loop1_90_type 1240 -#define _loop1_91_type 1241 -#define _tmp_92_type 1242 -#define _loop0_94_type 1243 -#define _gather_93_type 1244 -#define _tmp_95_type 1245 -#define _tmp_96_type 1246 -#define _tmp_97_type 1247 -#define _tmp_98_type 1248 -#define _loop1_99_type 1249 -#define _tmp_100_type 1250 -#define _tmp_101_type 1251 -#define _loop0_103_type 1252 -#define _gather_102_type 1253 -#define _loop1_104_type 1254 -#define _loop0_105_type 1255 -#define _loop0_106_type 1256 -#define _tmp_107_type 1257 -#define _tmp_108_type 1258 -#define _loop0_110_type 1259 -#define _gather_109_type 1260 -#define _loop0_112_type 1261 -#define _gather_111_type 1262 -#define _loop0_114_type 1263 -#define _gather_113_type 1264 -#define _loop0_116_type 1265 -#define _gather_115_type 1266 -#define _loop0_117_type 1267 -#define _loop0_119_type 1268 -#define _gather_118_type 1269 -#define _tmp_120_type 1270 -#define _loop0_122_type 1271 -#define _gather_121_type 1272 -#define _loop0_124_type 1273 -#define _gather_123_type 1274 -#define _tmp_125_type 1275 -#define _tmp_126_type 1276 -#define _tmp_127_type 1277 -#define _tmp_128_type 1278 -#define _tmp_129_type 1279 -#define _loop0_130_type 1280 -#define _tmp_131_type 1281 -#define _tmp_132_type 1282 -#define _tmp_133_type 1283 -#define _tmp_134_type 1284 -#define _tmp_135_type 1285 -#define _tmp_136_type 1286 -#define _tmp_137_type 1287 -#define _tmp_138_type 1288 -#define _tmp_139_type 1289 -#define _tmp_140_type 1290 -#define _tmp_141_type 1291 -#define _tmp_142_type 1292 -#define _tmp_143_type 1293 -#define _tmp_144_type 1294 -#define _loop1_145_type 1295 -#define _tmp_146_type 1296 -#define _tmp_147_type 1297 +#define del_target_end_type 1136 +#define targets_type 1137 +#define target_type 1138 +#define t_primary_type 1139 // Left-recursive +#define t_lookahead_type 1140 +#define t_atom_type 1141 +#define incorrect_arguments_type 1142 +#define invalid_kwarg_type 1143 +#define invalid_named_expression_type 1144 +#define invalid_assignment_type 1145 +#define invalid_block_type 1146 +#define invalid_comprehension_type 1147 +#define invalid_parameters_type 1148 +#define invalid_star_etc_type 1149 +#define invalid_lambda_star_etc_type 1150 +#define invalid_double_type_comments_type 1151 +#define invalid_del_target_type 1152 +#define _loop0_1_type 1153 +#define _loop0_2_type 1154 +#define _loop0_4_type 1155 +#define _gather_3_type 1156 +#define _loop0_6_type 1157 +#define _gather_5_type 1158 +#define _loop0_8_type 1159 +#define _gather_7_type 1160 +#define _loop0_10_type 1161 +#define _gather_9_type 1162 +#define _loop1_11_type 1163 +#define _loop0_13_type 1164 +#define _gather_12_type 1165 +#define _tmp_14_type 1166 +#define _tmp_15_type 1167 +#define _tmp_16_type 1168 +#define _tmp_17_type 1169 +#define _tmp_18_type 1170 +#define _tmp_19_type 1171 +#define _tmp_20_type 1172 +#define _tmp_21_type 1173 +#define _loop1_22_type 1174 +#define _tmp_23_type 1175 +#define _tmp_24_type 1176 +#define _loop0_26_type 1177 +#define _gather_25_type 1178 +#define _loop0_28_type 1179 +#define _gather_27_type 1180 +#define _tmp_29_type 1181 +#define _loop0_30_type 1182 +#define _loop1_31_type 1183 +#define _loop0_33_type 1184 +#define _gather_32_type 1185 +#define _tmp_34_type 1186 +#define _loop0_36_type 1187 +#define _gather_35_type 1188 +#define _tmp_37_type 1189 +#define _loop0_39_type 1190 +#define _gather_38_type 1191 +#define _loop0_41_type 1192 +#define _gather_40_type 1193 +#define _loop0_43_type 1194 +#define _gather_42_type 1195 +#define _loop0_45_type 1196 +#define _gather_44_type 1197 +#define _tmp_46_type 1198 +#define _loop1_47_type 1199 +#define _tmp_48_type 1200 +#define _tmp_49_type 1201 +#define _tmp_50_type 1202 +#define _tmp_51_type 1203 +#define _tmp_52_type 1204 +#define _loop0_53_type 1205 +#define _loop0_54_type 1206 +#define _loop0_55_type 1207 +#define _loop1_56_type 1208 +#define _loop0_57_type 1209 +#define _loop1_58_type 1210 +#define _loop1_59_type 1211 +#define _loop1_60_type 1212 +#define _loop0_61_type 1213 +#define _loop1_62_type 1214 +#define _loop0_63_type 1215 +#define _loop1_64_type 1216 +#define _loop0_65_type 1217 +#define _loop1_66_type 1218 +#define _loop1_67_type 1219 +#define _tmp_68_type 1220 +#define _loop0_70_type 1221 +#define _gather_69_type 1222 +#define _loop1_71_type 1223 +#define _loop0_73_type 1224 +#define _gather_72_type 1225 +#define _loop1_74_type 1226 +#define _loop0_75_type 1227 +#define _loop0_76_type 1228 +#define _loop0_77_type 1229 +#define _loop1_78_type 1230 +#define _loop0_79_type 1231 +#define _loop1_80_type 1232 +#define _loop1_81_type 1233 +#define _loop1_82_type 1234 +#define _loop0_83_type 1235 +#define _loop1_84_type 1236 +#define _loop0_85_type 1237 +#define _loop1_86_type 1238 +#define _loop0_87_type 1239 +#define _loop1_88_type 1240 +#define _loop1_89_type 1241 +#define _loop1_90_type 1242 +#define _loop1_91_type 1243 +#define _tmp_92_type 1244 +#define _loop0_94_type 1245 +#define _gather_93_type 1246 +#define _tmp_95_type 1247 +#define _tmp_96_type 1248 +#define _tmp_97_type 1249 +#define _tmp_98_type 1250 +#define _loop1_99_type 1251 +#define _tmp_100_type 1252 +#define _tmp_101_type 1253 +#define _loop0_103_type 1254 +#define _gather_102_type 1255 +#define _loop1_104_type 1256 +#define _loop0_105_type 1257 +#define _loop0_106_type 1258 +#define _tmp_107_type 1259 +#define _tmp_108_type 1260 +#define _loop0_110_type 1261 +#define _gather_109_type 1262 +#define _loop0_112_type 1263 +#define _gather_111_type 1264 +#define _loop0_114_type 1265 +#define _gather_113_type 1266 +#define _loop0_116_type 1267 +#define _gather_115_type 1268 +#define _loop0_117_type 1269 +#define _loop0_119_type 1270 +#define _gather_118_type 1271 +#define _tmp_120_type 1272 +#define _loop0_122_type 1273 +#define _gather_121_type 1274 +#define _loop0_124_type 1275 +#define _gather_123_type 1276 +#define _tmp_125_type 1277 +#define _tmp_126_type 1278 +#define _tmp_127_type 1279 +#define _tmp_128_type 1280 +#define _tmp_129_type 1281 +#define _loop0_130_type 1282 +#define _tmp_131_type 1283 +#define _tmp_132_type 1284 +#define _tmp_133_type 1285 +#define _tmp_134_type 1286 +#define _tmp_135_type 1287 +#define _tmp_136_type 1288 +#define _tmp_137_type 1289 +#define _tmp_138_type 1290 +#define _tmp_139_type 1291 +#define _tmp_140_type 1292 +#define _tmp_141_type 1293 +#define _tmp_142_type 1294 +#define _tmp_143_type 1295 +#define _tmp_144_type 1296 +#define _loop1_145_type 1297 +#define _tmp_146_type 1298 +#define _tmp_147_type 1299 static mod_ty file_rule(Parser *p); static mod_ty interactive_rule(Parser *p); @@ -503,6 +505,7 @@ static expr_ty ann_assign_subscript_attribute_target_rule(Parser *p); static asdl_seq* del_targets_rule(Parser *p); static expr_ty del_target_rule(Parser *p); static expr_ty del_t_atom_rule(Parser *p); +static void *del_target_end_rule(Parser *p); static asdl_seq* targets_rule(Parser *p); static expr_ty target_rule(Parser *p); static expr_ty t_primary_rule(Parser *p); @@ -518,6 +521,7 @@ static void *invalid_parameters_rule(Parser *p); static void *invalid_star_etc_rule(Parser *p); static void *invalid_lambda_star_etc_rule(Parser *p); static void *invalid_double_type_comments_rule(Parser *p); +static void *invalid_del_target_rule(Parser *p); static asdl_seq *_loop0_1_rule(Parser *p); static asdl_seq *_loop0_2_rule(Parser *p); static asdl_seq *_loop0_4_rule(Parser *p); @@ -9786,8 +9790,8 @@ del_targets_rule(Parser *p) } // del_target: -// | t_primary '.' NAME !t_lookahead -// | t_primary '[' slices ']' !t_lookahead +// | t_primary '.' NAME &del_target_end +// | t_primary '[' slices ']' &del_target_end // | del_t_atom static expr_ty del_target_rule(Parser *p) @@ -9807,7 +9811,7 @@ del_target_rule(Parser *p) UNUSED(_start_lineno); // Only used by EXTRA macro int _start_col_offset = p->tokens[_mark]->col_offset; UNUSED(_start_col_offset); // Only used by EXTRA macro - { // t_primary '.' NAME !t_lookahead + { // t_primary '.' NAME &del_target_end Token * _literal; expr_ty a; expr_ty b; @@ -9818,7 +9822,7 @@ del_target_rule(Parser *p) && (b = _PyPegen_name_token(p)) // NAME && - _PyPegen_lookahead(0, t_lookahead_rule, p) + _PyPegen_lookahead(1, del_target_end_rule, p) ) { Token *_token = _PyPegen_get_last_nonnwhitespace_token(p); @@ -9838,7 +9842,7 @@ del_target_rule(Parser *p) } p->mark = _mark; } - { // t_primary '[' slices ']' !t_lookahead + { // t_primary '[' slices ']' &del_target_end Token * _literal; Token * _literal_1; expr_ty a; @@ -9852,7 +9856,7 @@ del_target_rule(Parser *p) && (_literal_1 = _PyPegen_expect_token(p, 10)) // token=']' && - _PyPegen_lookahead(0, t_lookahead_rule, p) + _PyPegen_lookahead(1, del_target_end_rule, p) ) { Token *_token = _PyPegen_get_last_nonnwhitespace_token(p); @@ -9889,7 +9893,12 @@ del_target_rule(Parser *p) return _res; } -// del_t_atom: NAME | '(' del_target ')' | '(' del_targets? ')' | '[' del_targets? ']' +// del_t_atom: +// | NAME &del_target_end +// | '(' del_target ')' +// | '(' del_targets? ')' +// | '[' del_targets? ']' +// | invalid_del_target static expr_ty del_t_atom_rule(Parser *p) { @@ -9906,10 +9915,12 @@ del_t_atom_rule(Parser *p) UNUSED(_start_lineno); // Only used by EXTRA macro int _start_col_offset = p->tokens[_mark]->col_offset; UNUSED(_start_col_offset); // Only used by EXTRA macro - { // NAME + { // NAME &del_target_end expr_ty a; if ( (a = _PyPegen_name_token(p)) // NAME + && + _PyPegen_lookahead(1, del_target_end_rule, p) ) { _res = _PyPegen_set_expr_context ( p , a , Del ); @@ -10000,6 +10011,86 @@ del_t_atom_rule(Parser *p) } p->mark = _mark; } + { // invalid_del_target + void *invalid_del_target_var; + if ( + (invalid_del_target_var = invalid_del_target_rule(p)) // invalid_del_target + ) + { + _res = invalid_del_target_var; + goto done; + } + p->mark = _mark; + } + _res = NULL; + done: + return _res; +} + +// del_target_end: ')' | ']' | ',' | ';' | NEWLINE +static void * +del_target_end_rule(Parser *p) +{ + if (p->error_indicator) { + return NULL; + } + void * _res = NULL; + int _mark = p->mark; + { // ')' + Token * _literal; + if ( + (_literal = _PyPegen_expect_token(p, 8)) // token=')' + ) + { + _res = _literal; + goto done; + } + p->mark = _mark; + } + { // ']' + Token * _literal; + if ( + (_literal = _PyPegen_expect_token(p, 10)) // token=']' + ) + { + _res = _literal; + goto done; + } + p->mark = _mark; + } + { // ',' + Token * _literal; + if ( + (_literal = _PyPegen_expect_token(p, 12)) // token=',' + ) + { + _res = _literal; + goto done; + } + p->mark = _mark; + } + { // ';' + Token * _literal; + if ( + (_literal = _PyPegen_expect_token(p, 13)) // token=';' + ) + { + _res = _literal; + goto done; + } + p->mark = _mark; + } + { // NEWLINE + Token * newline_var; + if ( + (newline_var = _PyPegen_expect_token(p, NEWLINE)) // token='NEWLINE' + ) + { + _res = newline_var; + goto done; + } + p->mark = _mark; + } _res = NULL; done: return _res; @@ -10962,6 +11053,37 @@ invalid_double_type_comments_rule(Parser *p) return _res; } +// invalid_del_target: star_expression &del_target_end +static void * +invalid_del_target_rule(Parser *p) +{ + if (p->error_indicator) { + return NULL; + } + void * _res = NULL; + int _mark = p->mark; + { // star_expression &del_target_end + expr_ty a; + if ( + (a = star_expression_rule(p)) // star_expression + && + _PyPegen_lookahead(1, del_target_end_rule, p) + ) + { + _res = RAISE_SYNTAX_ERROR ( "cannot delete %s" , _PyPegen_get_expr_name ( a ) ); + if (_res == NULL && PyErr_Occurred()) { + p->error_indicator = 1; + return NULL; + } + goto done; + } + p->mark = _mark; + } + _res = NULL; + done: + return _res; +} + // _loop0_1: NEWLINE static asdl_seq * _loop0_1_rule(Parser *p) -- cgit v0.12