1 //===- ItaniumDemangle.cpp ------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Demangle/Demangle.h"
12 // This file exports a single function: llvm::itanium_demangle.
13 // It also has no dependencies on the rest of llvm. It is implemented this way
14 // so that it can be easily reused in libcxxabi.
25 // snprintf is implemented in VS 2015
27 #define snprintf _snprintf_s
40 static const char *parse_type(const char *first, const char *last, C &db);
42 static const char *parse_encoding(const char *first, const char *last, C &db);
44 static const char *parse_name(const char *first, const char *last, C &db,
45 bool *ends_with_template_args = 0);
47 static const char *parse_expression(const char *first, const char *last, C &db);
49 static const char *parse_template_args(const char *first, const char *last,
52 static const char *parse_operator_name(const char *first, const char *last,
55 static const char *parse_unqualified_name(const char *first, const char *last,
58 static const char *parse_decltype(const char *first, const char *last, C &db);
60 // <number> ::= [n] <non-negative decimal integer>
62 static const char *parse_number(const char *first, const char *last) {
64 const char *t = first;
70 } else if ('1' <= *t && *t <= '9') {
72 while (first != last && std::isdigit(*first))
81 template <class Float> struct float_data;
83 template <> struct float_data<float> {
84 static const size_t mangled_size = 8;
85 static const size_t max_demangled_size = 24;
86 static const char *spec;
88 const char *float_data<float>::spec = "%af";
90 template <> struct float_data<double> {
91 static const size_t mangled_size = 16;
92 static const size_t max_demangled_size = 32;
93 static const char *spec;
96 const char *float_data<double>::spec = "%a";
98 template <> struct float_data<long double> {
99 #if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \
101 static const size_t mangled_size = 32;
102 #elif defined(__arm__) || defined(__mips__) || defined(__hexagon__)
103 static const size_t mangled_size = 16;
105 static const size_t mangled_size =
106 20; // May need to be adjusted to 16 or 24 on other platforms
108 static const size_t max_demangled_size = 40;
109 static const char *spec;
112 const char *float_data<long double>::spec = "%LaL";
115 template <class Float, class C>
116 static const char *parse_floating_number(const char *first, const char *last,
118 const size_t N = float_data<Float>::mangled_size;
119 if (static_cast<std::size_t>(last - first) > N) {
123 char buf[sizeof(Float)];
125 const char *t = first;
127 for (; t != last; ++t, ++e) {
130 unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
131 : static_cast<unsigned>(*t - 'a' + 10);
133 unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
134 : static_cast<unsigned>(*t - 'a' + 10);
135 *e = static_cast<char>((d1 << 4) + d0);
138 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
139 std::reverse(buf, e);
141 char num[float_data<Float>::max_demangled_size] = {0};
142 int n = snprintf(num, sizeof(num), float_data<Float>::spec, value);
143 if (static_cast<std::size_t>(n) >= sizeof(num))
145 db.names.push_back(std::string(num, static_cast<std::size_t>(n)));
152 // <source-name> ::= <positive length number> <identifier>
155 static const char *parse_source_name(const char *first, const char *last,
159 if (isdigit(c) && first + 1 != last) {
160 const char *t = first + 1;
161 size_t n = static_cast<size_t>(c - '0');
162 for (c = *t; isdigit(c); c = *t) {
163 n = n * 10 + static_cast<size_t>(c - '0');
167 if (static_cast<size_t>(last - t) >= n) {
169 if (r.substr(0, 10) == "_GLOBAL__N")
170 db.names.push_back("(anonymous namespace)");
172 db.names.push_back(std::move(r));
180 // <substitution> ::= S <seq-id> _
182 // <substitution> ::= Sa # ::std::allocator
183 // <substitution> ::= Sb # ::std::basic_string
184 // <substitution> ::= Ss # ::std::basic_string < char,
185 // ::std::char_traits<char>,
186 // ::std::allocator<char> >
187 // <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> >
188 // <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> >
189 // <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >
192 static const char *parse_substitution(const char *first, const char *last,
194 if (last - first >= 2) {
198 db.names.push_back("std::allocator");
202 db.names.push_back("std::basic_string");
206 db.names.push_back("std::string");
210 db.names.push_back("std::istream");
214 db.names.push_back("std::ostream");
218 db.names.push_back("std::iostream");
222 if (!db.subs.empty()) {
223 for (const auto &n : db.subs.front())
224 db.names.push_back(n);
229 if (std::isdigit(first[1]) || std::isupper(first[1])) {
231 const char *t = first + 1;
232 if (std::isdigit(*t))
233 sub = static_cast<size_t>(*t - '0');
235 sub = static_cast<size_t>(*t - 'A') + 10;
236 for (++t; t != last && (std::isdigit(*t) || std::isupper(*t)); ++t) {
238 if (std::isdigit(*t))
239 sub += static_cast<size_t>(*t - '0');
241 sub += static_cast<size_t>(*t - 'A') + 10;
243 if (t == last || *t != '_')
246 if (sub < db.subs.size()) {
247 for (const auto &n : db.subs[sub])
248 db.names.push_back(n);
259 // <builtin-type> ::= v # void
263 // ::= a # signed char
264 // ::= h # unsigned char
266 // ::= t # unsigned short
268 // ::= j # unsigned int
270 // ::= m # unsigned long
271 // ::= x # long long, __int64
272 // ::= y # unsigned long long, __int64
274 // ::= o # unsigned __int128
277 // ::= e # long double, __float80
278 // ::= g # __float128
280 // ::= Dd # IEEE 754r decimal floating point (64 bits)
281 // ::= De # IEEE 754r decimal floating point (128 bits)
282 // ::= Df # IEEE 754r decimal floating point (32 bits)
283 // ::= Dh # IEEE 754r half-precision floating point (16 bits)
286 // ::= Da # auto (in dependent new-expressions)
287 // ::= Dc # decltype(auto)
288 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
289 // ::= u <source-name> # vendor extended type
292 static const char *parse_builtin_type(const char *first, const char *last,
297 db.names.push_back("void");
301 db.names.push_back("wchar_t");
305 db.names.push_back("bool");
309 db.names.push_back("char");
313 db.names.push_back("signed char");
317 db.names.push_back("unsigned char");
321 db.names.push_back("short");
325 db.names.push_back("unsigned short");
329 db.names.push_back("int");
333 db.names.push_back("unsigned int");
337 db.names.push_back("long");
341 db.names.push_back("unsigned long");
345 db.names.push_back("long long");
349 db.names.push_back("unsigned long long");
353 db.names.push_back("__int128");
357 db.names.push_back("unsigned __int128");
361 db.names.push_back("float");
365 db.names.push_back("double");
369 db.names.push_back("long double");
373 db.names.push_back("__float128");
377 db.names.push_back("...");
381 const char *t = parse_source_name(first + 1, last, db);
386 if (first + 1 != last) {
389 db.names.push_back("decimal64");
393 db.names.push_back("decimal128");
397 db.names.push_back("decimal32");
401 db.names.push_back("decimal16");
405 db.names.push_back("char32_t");
409 db.names.push_back("char16_t");
413 db.names.push_back("auto");
417 db.names.push_back("decltype(auto)");
421 db.names.push_back("std::nullptr_t");
432 // <CV-qualifiers> ::= [r] [V] [K]
434 static const char *parse_cv_qualifiers(const char *first, const char *last,
454 // <template-param> ::= T_ # first template parameter
455 // ::= T <parameter-2 non-negative number> _
458 static const char *parse_template_param(const char *first, const char *last,
460 if (last - first >= 2) {
462 if (first[1] == '_') {
463 if (db.template_param.empty())
465 if (!db.template_param.back().empty()) {
466 for (auto &t : db.template_param.back().front())
467 db.names.push_back(t);
470 db.names.push_back("T_");
472 db.fix_forward_references = true;
474 } else if (isdigit(first[1])) {
475 const char *t = first + 1;
476 size_t sub = static_cast<size_t>(*t - '0');
477 for (++t; t != last && isdigit(*t); ++t) {
479 sub += static_cast<size_t>(*t - '0');
481 if (t == last || *t != '_' || db.template_param.empty())
484 if (sub < db.template_param.back().size()) {
485 for (auto &temp : db.template_param.back()[sub])
486 db.names.push_back(temp);
489 db.names.push_back(std::string(first, t + 1));
491 db.fix_forward_references = true;
499 // cc <type> <expression> # const_cast<type>
503 static const char *parse_const_cast_expr(const char *first, const char *last,
505 if (last - first >= 3 && first[0] == 'c' && first[1] == 'c') {
506 const char *t = parse_type(first + 2, last, db);
507 if (t != first + 2) {
508 const char *t1 = parse_expression(t, last, db);
510 if (db.names.size() < 2)
512 auto expr = db.names.back().move_full();
514 if (db.names.empty())
517 "const_cast<" + db.names.back().move_full() + ">(" + expr + ")";
525 // dc <type> <expression> # dynamic_cast<type>
529 static const char *parse_dynamic_cast_expr(const char *first, const char *last,
531 if (last - first >= 3 && first[0] == 'd' && first[1] == 'c') {
532 const char *t = parse_type(first + 2, last, db);
533 if (t != first + 2) {
534 const char *t1 = parse_expression(t, last, db);
536 if (db.names.size() < 2)
538 auto expr = db.names.back().move_full();
540 if (db.names.empty())
543 "dynamic_cast<" + db.names.back().move_full() + ">(" + expr + ")";
551 // rc <type> <expression> # reinterpret_cast<type>
555 static const char *parse_reinterpret_cast_expr(const char *first,
556 const char *last, C &db) {
557 if (last - first >= 3 && first[0] == 'r' && first[1] == 'c') {
558 const char *t = parse_type(first + 2, last, db);
559 if (t != first + 2) {
560 const char *t1 = parse_expression(t, last, db);
562 if (db.names.size() < 2)
564 auto expr = db.names.back().move_full();
566 if (db.names.empty())
568 db.names.back() = "reinterpret_cast<" + db.names.back().move_full() +
577 // sc <type> <expression> # static_cast<type>
581 static const char *parse_static_cast_expr(const char *first, const char *last,
583 if (last - first >= 3 && first[0] == 's' && first[1] == 'c') {
584 const char *t = parse_type(first + 2, last, db);
585 if (t != first + 2) {
586 const char *t1 = parse_expression(t, last, db);
588 if (db.names.size() < 2)
590 auto expr = db.names.back().move_full();
593 "static_cast<" + db.names.back().move_full() + ">(" + expr + ")";
601 // sp <expression> # pack expansion
604 static const char *parse_pack_expansion(const char *first, const char *last,
606 if (last - first >= 3 && first[0] == 's' && first[1] == 'p') {
607 const char *t = parse_expression(first + 2, last, db);
614 // st <type> # sizeof (a type)
617 static const char *parse_sizeof_type_expr(const char *first, const char *last,
619 if (last - first >= 3 && first[0] == 's' && first[1] == 't') {
620 const char *t = parse_type(first + 2, last, db);
621 if (t != first + 2) {
622 if (db.names.empty())
624 db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
631 // sz <expr> # sizeof (a expression)
634 static const char *parse_sizeof_expr_expr(const char *first, const char *last,
636 if (last - first >= 3 && first[0] == 's' && first[1] == 'z') {
637 const char *t = parse_expression(first + 2, last, db);
638 if (t != first + 2) {
639 if (db.names.empty())
641 db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
648 // sZ <template-param> # size of a parameter
652 static const char *parse_sizeof_param_pack_expr(const char *first,
653 const char *last, C &db) {
654 if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
656 size_t k0 = db.names.size();
657 const char *t = parse_template_param(first + 2, last, db);
658 size_t k1 = db.names.size();
659 if (t != first + 2) {
660 std::string tmp("sizeof...(");
663 tmp += db.names[k].move_full();
664 for (++k; k != k1; ++k)
665 tmp += ", " + db.names[k].move_full();
668 for (; k1 != k0; --k1)
670 db.names.push_back(std::move(tmp));
677 // <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, first parameter
678 // ::= fp <top-level CV-qualifiers> <parameter-2 non-negative
679 // number> _ # L == 0, second and later parameters
680 // ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
681 // _ # L > 0, first parameter
682 // ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
683 // <parameter-2 non-negative number> _ # L > 0, second and
687 static const char *parse_function_param(const char *first, const char *last,
689 if (last - first >= 3 && *first == 'f') {
690 if (first[1] == 'p') {
692 const char *t = parse_cv_qualifiers(first + 2, last, cv);
693 const char *t1 = parse_number(t, last);
694 if (t1 != last && *t1 == '_') {
695 db.names.push_back("fp" + std::string(t, t1));
698 } else if (first[1] == 'L') {
700 const char *t0 = parse_number(first + 2, last);
701 if (t0 != last && *t0 == 'p') {
703 const char *t = parse_cv_qualifiers(t0, last, cv);
704 const char *t1 = parse_number(t, last);
705 if (t1 != last && *t1 == '_') {
706 db.names.push_back("fp" + std::string(t, t1));
715 // sZ <function-param> # size of a function
719 static const char *parse_sizeof_function_param_pack_expr(const char *first,
722 if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
724 const char *t = parse_function_param(first + 2, last, db);
725 if (t != first + 2) {
726 if (db.names.empty())
728 db.names.back() = "sizeof...(" + db.names.back().move_full() + ")";
735 // te <expression> # typeid (expression)
736 // ti <type> # typeid (type)
739 static const char *parse_typeid_expr(const char *first, const char *last,
741 if (last - first >= 3 && first[0] == 't' &&
742 (first[1] == 'e' || first[1] == 'i')) {
745 t = parse_expression(first + 2, last, db);
747 t = parse_type(first + 2, last, db);
748 if (t != first + 2) {
749 if (db.names.empty())
751 db.names.back() = "typeid(" + db.names.back().move_full() + ")";
758 // tw <expression> # throw expression
761 static const char *parse_throw_expr(const char *first, const char *last,
763 if (last - first >= 3 && first[0] == 't' && first[1] == 'w') {
764 const char *t = parse_expression(first + 2, last, db);
765 if (t != first + 2) {
766 if (db.names.empty())
768 db.names.back() = "throw " + db.names.back().move_full();
775 // ds <expression> <expression> # expr.*expr
778 static const char *parse_dot_star_expr(const char *first, const char *last,
780 if (last - first >= 3 && first[0] == 'd' && first[1] == 's') {
781 const char *t = parse_expression(first + 2, last, db);
782 if (t != first + 2) {
783 const char *t1 = parse_expression(t, last, db);
785 if (db.names.size() < 2)
787 auto expr = db.names.back().move_full();
789 db.names.back().first += ".*" + expr;
797 // <simple-id> ::= <source-name> [ <template-args> ]
800 static const char *parse_simple_id(const char *first, const char *last, C &db) {
802 const char *t = parse_source_name(first, last, db);
804 const char *t1 = parse_template_args(t, last, db);
806 if (db.names.size() < 2)
808 auto args = db.names.back().move_full();
810 db.names.back().first += std::move(args);
819 // <unresolved-type> ::= <template-param>
821 // ::= <substitution>
824 static const char *parse_unresolved_type(const char *first, const char *last,
827 const char *t = first;
830 size_t k0 = db.names.size();
831 t = parse_template_param(first, last, db);
832 size_t k1 = db.names.size();
833 if (t != first && k1 == k0 + 1) {
834 db.subs.push_back(typename C::sub_type(1, db.names.back()));
837 for (; k1 != k0; --k1)
843 t = parse_decltype(first, last, db);
845 if (db.names.empty())
847 db.subs.push_back(typename C::sub_type(1, db.names.back()));
852 t = parse_substitution(first, last, db);
856 if (last - first > 2 && first[1] == 't') {
857 t = parse_unqualified_name(first + 2, last, db);
858 if (t != first + 2) {
859 if (db.names.empty())
861 db.names.back().first.insert(0, "std::");
862 db.subs.push_back(typename C::sub_type(1, db.names.back()));
873 // <destructor-name> ::= <unresolved-type> # e.g.,
874 // ~T or ~decltype(f())
875 // ::= <simple-id> # e.g.,
879 static const char *parse_destructor_name(const char *first, const char *last,
882 const char *t = parse_unresolved_type(first, last, db);
884 t = parse_simple_id(first, last, db);
886 if (db.names.empty())
888 db.names.back().first.insert(0, "~");
895 // <base-unresolved-name> ::= <simple-id> #
897 // extension ::= <operator-name> #
898 // unresolved operator-function-id
899 // extension ::= <operator-name> <template-args> #
900 // unresolved operator template-id
901 // ::= on <operator-name> #
902 // unresolved operator-function-id
903 // ::= on <operator-name> <template-args> #
904 // unresolved operator template-id
905 // ::= dn <destructor-name> #
906 // destructor or pseudo-destructor;
913 static const char *parse_base_unresolved_name(const char *first,
914 const char *last, C &db) {
915 if (last - first >= 2) {
916 if ((first[0] == 'o' || first[0] == 'd') && first[1] == 'n') {
917 if (first[0] == 'o') {
918 const char *t = parse_operator_name(first + 2, last, db);
919 if (t != first + 2) {
920 first = parse_template_args(t, last, db);
922 if (db.names.size() < 2)
924 auto args = db.names.back().move_full();
926 db.names.back().first += std::move(args);
930 const char *t = parse_destructor_name(first + 2, last, db);
935 const char *t = parse_simple_id(first, last, db);
937 t = parse_operator_name(first, last, db);
939 first = parse_template_args(t, last, db);
941 if (db.names.size() < 2)
943 auto args = db.names.back().move_full();
945 db.names.back().first += std::move(args);
955 // <unresolved-qualifier-level> ::= <simple-id>
958 static const char *parse_unresolved_qualifier_level(const char *first,
959 const char *last, C &db) {
960 return parse_simple_id(first, last, db);
964 // extension ::= srN <unresolved-type> [<template-args>]
965 // <unresolved-qualifier-level>* E <base-unresolved-name>
966 // ::= [gs] <base-unresolved-name> # x or
968 // ::= [gs] sr <unresolved-qualifier-level>+ E
969 // <base-unresolved-name>
977 // ::= sr <unresolved-type> <base-unresolved-name> # T::x
979 // extension ::= sr <unresolved-type> <template-args>
980 // <base-unresolved-name>
983 // /decltype(p)::N::x
984 // (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
985 // <base-unresolved-name>
988 static const char *parse_unresolved_name(const char *first, const char *last,
990 if (last - first > 2) {
991 const char *t = first;
993 if (t[0] == 'g' && t[1] == 's') {
997 const char *t2 = parse_base_unresolved_name(t, last, db);
1000 if (db.names.empty())
1002 db.names.back().first.insert(0, "::");
1005 } else if (last - t > 2 && t[0] == 's' && t[1] == 'r') {
1008 const char *t1 = parse_unresolved_type(t, last, db);
1009 if (t1 == t || t1 == last)
1012 t1 = parse_template_args(t, last, db);
1014 if (db.names.size() < 2)
1016 auto args = db.names.back().move_full();
1017 db.names.pop_back();
1018 db.names.back().first += std::move(args);
1021 db.names.pop_back();
1026 t1 = parse_unresolved_qualifier_level(t, last, db);
1027 if (t1 == t || t1 == last || db.names.size() < 2)
1029 auto s = db.names.back().move_full();
1030 db.names.pop_back();
1031 db.names.back().first += "::" + std::move(s);
1035 t1 = parse_base_unresolved_name(t, last, db);
1037 if (!db.names.empty())
1038 db.names.pop_back();
1041 if (db.names.size() < 2)
1043 auto s = db.names.back().move_full();
1044 db.names.pop_back();
1045 db.names.back().first += "::" + std::move(s);
1049 const char *t1 = parse_unresolved_type(t, last, db);
1052 t1 = parse_template_args(t, last, db);
1054 if (db.names.size() < 2)
1056 auto args = db.names.back().move_full();
1057 db.names.pop_back();
1058 db.names.back().first += std::move(args);
1061 t1 = parse_base_unresolved_name(t, last, db);
1063 if (!db.names.empty())
1064 db.names.pop_back();
1067 if (db.names.size() < 2)
1069 auto s = db.names.back().move_full();
1070 db.names.pop_back();
1071 db.names.back().first += "::" + std::move(s);
1074 t1 = parse_unresolved_qualifier_level(t, last, db);
1075 if (t1 == t || t1 == last)
1079 if (db.names.empty())
1081 db.names.back().first.insert(0, "::");
1084 t1 = parse_unresolved_qualifier_level(t, last, db);
1085 if (t1 == t || t1 == last || db.names.size() < 2)
1087 auto s = db.names.back().move_full();
1088 db.names.pop_back();
1089 db.names.back().first += "::" + std::move(s);
1093 t1 = parse_base_unresolved_name(t, last, db);
1095 if (!db.names.empty())
1096 db.names.pop_back();
1099 if (db.names.size() < 2)
1101 auto s = db.names.back().move_full();
1102 db.names.pop_back();
1103 db.names.back().first += "::" + std::move(s);
1112 // dt <expression> <unresolved-name> # expr.name
1115 static const char *parse_dot_expr(const char *first, const char *last, C &db) {
1116 if (last - first >= 3 && first[0] == 'd' && first[1] == 't') {
1117 const char *t = parse_expression(first + 2, last, db);
1118 if (t != first + 2) {
1119 const char *t1 = parse_unresolved_name(t, last, db);
1121 if (db.names.size() < 2)
1123 auto name = db.names.back().move_full();
1124 db.names.pop_back();
1125 if (db.names.empty())
1127 db.names.back().first += "." + name;
1135 // cl <expression>+ E # call
1138 static const char *parse_call_expr(const char *first, const char *last, C &db) {
1139 if (last - first >= 4 && first[0] == 'c' && first[1] == 'l') {
1140 const char *t = parse_expression(first + 2, last, db);
1141 if (t != first + 2) {
1144 if (db.names.empty())
1146 db.names.back().first += db.names.back().second;
1147 db.names.back().second = std::string();
1148 db.names.back().first.append("(");
1149 bool first_expr = true;
1151 const char *t1 = parse_expression(t, last, db);
1152 if (t1 == t || t1 == last)
1154 if (db.names.empty())
1156 auto tmp = db.names.back().move_full();
1157 db.names.pop_back();
1159 if (db.names.empty())
1162 db.names.back().first.append(", ");
1165 db.names.back().first.append(tmp);
1170 if (db.names.empty())
1172 db.names.back().first.append(")");
1179 // [gs] nw <expression>* _ <type> E # new (expr-list) type
1180 // [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type
1182 // [gs] na <expression>* _ <type> E # new[] (expr-list) type
1183 // [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type
1185 // <initializer> ::= pi <expression>* E # parenthesized
1189 static const char *parse_new_expr(const char *first, const char *last, C &db) {
1190 if (last - first >= 4) {
1191 const char *t = first;
1192 bool parsed_gs = false;
1193 if (t[0] == 'g' && t[1] == 's') {
1197 if (t[0] == 'n' && (t[1] == 'w' || t[1] == 'a')) {
1198 bool is_array = t[1] == 'a';
1202 bool has_expr_list = false;
1203 bool first_expr = true;
1205 const char *t1 = parse_expression(t, last, db);
1206 if (t1 == t || t1 == last)
1208 has_expr_list = true;
1210 if (db.names.empty())
1212 auto tmp = db.names.back().move_full();
1213 db.names.pop_back();
1215 if (db.names.empty())
1217 db.names.back().first.append(", ");
1218 db.names.back().first.append(tmp);
1225 const char *t1 = parse_type(t, last, db);
1226 if (t1 == t || t1 == last)
1229 bool has_init = false;
1230 if (last - t >= 3 && t[0] == 'p' && t[1] == 'i') {
1235 t1 = parse_expression(t, last, db);
1236 if (t1 == t || t1 == last)
1239 if (db.names.empty())
1241 auto tmp = db.names.back().move_full();
1242 db.names.pop_back();
1244 if (db.names.empty())
1246 db.names.back().first.append(", ");
1247 db.names.back().first.append(tmp);
1256 std::string init_list;
1258 if (db.names.empty())
1260 init_list = db.names.back().move_full();
1261 db.names.pop_back();
1263 if (db.names.empty())
1265 auto type = db.names.back().move_full();
1266 db.names.pop_back();
1267 std::string expr_list;
1268 if (has_expr_list) {
1269 if (db.names.empty())
1271 expr_list = db.names.back().move_full();
1272 db.names.pop_back();
1282 r += "(" + expr_list + ") ";
1285 r += " (" + init_list + ")";
1286 db.names.push_back(std::move(r));
1293 // cv <type> <expression> # conversion with one
1295 // cv <type> _ <expression>* E # conversion with a
1296 // different number of arguments
1299 static const char *parse_conversion_expr(const char *first, const char *last,
1301 if (last - first >= 3 && first[0] == 'c' && first[1] == 'v') {
1302 bool try_to_parse_template_args = db.try_to_parse_template_args;
1303 db.try_to_parse_template_args = false;
1304 const char *t = parse_type(first + 2, last, db);
1305 db.try_to_parse_template_args = try_to_parse_template_args;
1306 if (t != first + 2 && t != last) {
1308 const char *t1 = parse_expression(t, last, db);
1317 db.names.emplace_back();
1319 bool first_expr = true;
1321 const char *t1 = parse_expression(t, last, db);
1322 if (t1 == t || t1 == last)
1325 if (db.names.empty())
1327 auto tmp = db.names.back().move_full();
1328 db.names.pop_back();
1330 if (db.names.empty())
1332 db.names.back().first.append(", ");
1333 db.names.back().first.append(tmp);
1342 if (db.names.size() < 2)
1344 auto tmp = db.names.back().move_full();
1345 db.names.pop_back();
1346 db.names.back() = "(" + db.names.back().move_full() + ")(" + tmp + ")";
1353 // pt <expression> <expression> # expr->name
1356 static const char *parse_arrow_expr(const char *first, const char *last,
1358 if (last - first >= 3 && first[0] == 'p' && first[1] == 't') {
1359 const char *t = parse_expression(first + 2, last, db);
1360 if (t != first + 2) {
1361 const char *t1 = parse_expression(t, last, db);
1363 if (db.names.size() < 2)
1365 auto tmp = db.names.back().move_full();
1366 db.names.pop_back();
1367 db.names.back().first += "->";
1368 db.names.back().first += tmp;
1376 // <ref-qualifier> ::= R # & ref-qualifier
1377 // <ref-qualifier> ::= O # && ref-qualifier
1379 // <function-type> ::= F [Y] <bare-function-type> [<ref-qualifier>] E
1382 static const char *parse_function_type(const char *first, const char *last,
1384 if (first != last && *first == 'F') {
1385 const char *t = first + 1;
1392 const char *t1 = parse_type(t, last, db);
1395 std::string sig("(");
1399 db.names.pop_back();
1410 if (*t == 'R' && t + 1 != last && t[1] == 'E') {
1415 if (*t == 'O' && t + 1 != last && t[1] == 'E') {
1420 size_t k0 = db.names.size();
1421 t1 = parse_type(t, last, db);
1422 size_t k1 = db.names.size();
1423 if (t1 == t || t1 == last)
1425 for (size_t k = k0; k < k1; ++k) {
1428 sig += db.names[k].move_full();
1430 for (size_t k = k0; k < k1; ++k)
1431 db.names.pop_back();
1443 if (db.names.empty())
1445 db.names.back().first += " ";
1446 db.names.back().second.insert(0, sig);
1454 // <pointer-to-member-type> ::= M <class type> <member type>
1457 static const char *parse_pointer_to_member_type(const char *first,
1458 const char *last, C &db) {
1459 if (first != last && *first == 'M') {
1460 const char *t = parse_type(first + 1, last, db);
1461 if (t != first + 1) {
1462 const char *t2 = parse_type(t, last, db);
1464 if (db.names.size() < 2)
1466 auto func = std::move(db.names.back());
1467 db.names.pop_back();
1468 auto class_type = std::move(db.names.back());
1469 if (!func.second.empty() && func.second.front() == '(') {
1470 db.names.back().first =
1471 std::move(func.first) + "(" + class_type.move_full() + "::*";
1472 db.names.back().second = ")" + std::move(func.second);
1474 db.names.back().first =
1475 std::move(func.first) + " " + class_type.move_full() + "::*";
1476 db.names.back().second = std::move(func.second);
1485 // <array-type> ::= A <positive dimension number> _ <element type>
1486 // ::= A [<dimension expression>] _ <element type>
1489 static const char *parse_array_type(const char *first, const char *last,
1491 if (first != last && *first == 'A' && first + 1 != last) {
1492 if (first[1] == '_') {
1493 const char *t = parse_type(first + 2, last, db);
1494 if (t != first + 2) {
1495 if (db.names.empty())
1497 if (db.names.back().second.substr(0, 2) == " [")
1498 db.names.back().second.erase(0, 1);
1499 db.names.back().second.insert(0, " []");
1502 } else if ('1' <= first[1] && first[1] <= '9') {
1503 const char *t = parse_number(first + 1, last);
1504 if (t != last && *t == '_') {
1505 const char *t2 = parse_type(t + 1, last, db);
1507 if (db.names.empty())
1509 if (db.names.back().second.substr(0, 2) == " [")
1510 db.names.back().second.erase(0, 1);
1511 db.names.back().second.insert(0,
1512 " [" + std::string(first + 1, t) + "]");
1517 const char *t = parse_expression(first + 1, last, db);
1518 if (t != first + 1 && t != last && *t == '_') {
1519 const char *t2 = parse_type(++t, last, db);
1521 if (db.names.size() < 2)
1523 auto type = std::move(db.names.back());
1524 db.names.pop_back();
1525 auto expr = std::move(db.names.back());
1526 db.names.back().first = std::move(type.first);
1527 if (type.second.substr(0, 2) == " [")
1528 type.second.erase(0, 1);
1529 db.names.back().second =
1530 " [" + expr.move_full() + "]" + std::move(type.second);
1539 // <decltype> ::= Dt <expression> E # decltype of an id-expression or class
1540 // member access (C++0x)
1541 // ::= DT <expression> E # decltype of an expression (C++0x)
1544 static const char *parse_decltype(const char *first, const char *last, C &db) {
1545 if (last - first >= 4 && first[0] == 'D') {
1549 const char *t = parse_expression(first + 2, last, db);
1550 if (t != first + 2 && t != last && *t == 'E') {
1551 if (db.names.empty())
1553 db.names.back() = "decltype(" + db.names.back().move_full() + ")";
1563 // <vector-type> ::= Dv <positive dimension number> _
1564 // <extended element type>
1565 // ::= Dv [<dimension expression>] _ <element type>
1566 // <extended element type> ::= <element type>
1567 // ::= p # AltiVec vector pixel
1570 static const char *parse_vector_type(const char *first, const char *last,
1572 if (last - first > 3 && first[0] == 'D' && first[1] == 'v') {
1573 if ('1' <= first[2] && first[2] <= '9') {
1574 const char *t = parse_number(first + 2, last);
1575 if (t == last || *t != '_')
1577 const char *num = first + 2;
1578 size_t sz = static_cast<size_t>(t - num);
1581 const char *t1 = parse_type(t, last, db);
1583 if (db.names.empty())
1585 db.names.back().first += " vector[" + std::string(num, sz) + "]";
1590 db.names.push_back("pixel vector[" + std::string(num, sz) + "]");
1596 const char *t1 = first + 2;
1598 const char *t = parse_expression(t1, last, db);
1600 if (db.names.empty())
1602 num = db.names.back().move_full();
1603 db.names.pop_back();
1607 if (t1 != last && *t1 == '_' && ++t1 != last) {
1608 const char *t = parse_type(t1, last, db);
1610 if (db.names.empty())
1612 db.names.back().first += " vector[" + num + "]";
1621 // <type> ::= <builtin-type>
1622 // ::= <function-type>
1623 // ::= <class-enum-type>
1625 // ::= <pointer-to-member-type>
1626 // ::= <template-param>
1627 // ::= <template-template-param> <template-args>
1629 // ::= <substitution>
1630 // ::= <CV-qualifiers> <type>
1631 // ::= P <type> # pointer-to
1632 // ::= R <type> # reference-to
1633 // ::= O <type> # rvalue reference-to (C++0x)
1634 // ::= C <type> # complex pair (C 2000)
1635 // ::= G <type> # imaginary (C 2000)
1636 // ::= Dp <type> # pack expansion (C++0x)
1637 // ::= U <source-name> <type> # vendor extended type qualifier
1638 // extension := U <objc-name> <objc-type> # objc-type<identifier>
1639 // extension := <vector-type> # <vector-type> starts with Dv
1641 // <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 +
1642 // <number of digits in k1> + k1
1643 // <objc-type> := <source-name> # PU<11+>objcproto 11objc_object<source-name>
1644 // 11objc_object -> id<source-name>
1647 static const char *parse_type(const char *first, const char *last, C &db) {
1648 if (first != last) {
1654 const char *t = parse_cv_qualifiers(first, last, cv);
1656 bool is_function = *t == 'F';
1657 size_t k0 = db.names.size();
1658 const char *t1 = parse_type(t, last, db);
1659 size_t k1 = db.names.size();
1663 db.subs.emplace_back();
1664 for (size_t k = k0; k < k1; ++k) {
1666 size_t p = db.names[k].second.size();
1667 if (db.names[k].second[p - 2] == '&')
1669 else if (db.names[k].second.back() == '&')
1672 db.names[k].second.insert(p, " const");
1676 db.names[k].second.insert(p, " volatile");
1680 db.names[k].second.insert(p, " restrict");
1683 db.names[k].first.append(" const");
1685 db.names[k].first.append(" volatile");
1687 db.names[k].first.append(" restrict");
1689 db.subs.back().push_back(db.names[k]);
1696 const char *t = parse_builtin_type(first, last, db);
1702 t = parse_array_type(first, last, db);
1704 if (db.names.empty())
1707 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1711 t = parse_type(first + 1, last, db);
1712 if (t != first + 1) {
1713 if (db.names.empty())
1715 db.names.back().first.append(" complex");
1717 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1721 t = parse_function_type(first, last, db);
1723 if (db.names.empty())
1726 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1730 t = parse_type(first + 1, last, db);
1731 if (t != first + 1) {
1732 if (db.names.empty())
1734 db.names.back().first.append(" imaginary");
1736 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1740 t = parse_pointer_to_member_type(first, last, db);
1742 if (db.names.empty())
1745 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1749 size_t k0 = db.names.size();
1750 t = parse_type(first + 1, last, db);
1751 size_t k1 = db.names.size();
1752 if (t != first + 1) {
1753 db.subs.emplace_back();
1754 for (size_t k = k0; k < k1; ++k) {
1755 if (db.names[k].second.substr(0, 2) == " [") {
1756 db.names[k].first += " (";
1757 db.names[k].second.insert(0, ")");
1758 } else if (!db.names[k].second.empty() &&
1759 db.names[k].second.front() == '(') {
1760 db.names[k].first += "(";
1761 db.names[k].second.insert(0, ")");
1763 db.names[k].first.append("&&");
1764 db.subs.back().push_back(db.names[k]);
1771 size_t k0 = db.names.size();
1772 t = parse_type(first + 1, last, db);
1773 size_t k1 = db.names.size();
1774 if (t != first + 1) {
1775 db.subs.emplace_back();
1776 for (size_t k = k0; k < k1; ++k) {
1777 if (db.names[k].second.substr(0, 2) == " [") {
1778 db.names[k].first += " (";
1779 db.names[k].second.insert(0, ")");
1780 } else if (!db.names[k].second.empty() &&
1781 db.names[k].second.front() == '(') {
1782 db.names[k].first += "(";
1783 db.names[k].second.insert(0, ")");
1785 if (first[1] != 'U' ||
1786 db.names[k].first.substr(0, 12) != "objc_object<") {
1787 db.names[k].first.append("*");
1789 db.names[k].first.replace(0, 11, "id");
1791 db.subs.back().push_back(db.names[k]);
1798 size_t k0 = db.names.size();
1799 t = parse_type(first + 1, last, db);
1800 size_t k1 = db.names.size();
1801 if (t != first + 1) {
1802 db.subs.emplace_back();
1803 for (size_t k = k0; k < k1; ++k) {
1804 if (db.names[k].second.substr(0, 2) == " [") {
1805 db.names[k].first += " (";
1806 db.names[k].second.insert(0, ")");
1807 } else if (!db.names[k].second.empty() &&
1808 db.names[k].second.front() == '(') {
1809 db.names[k].first += "(";
1810 db.names[k].second.insert(0, ")");
1812 db.names[k].first.append("&");
1813 db.subs.back().push_back(db.names[k]);
1820 size_t k0 = db.names.size();
1821 t = parse_template_param(first, last, db);
1822 size_t k1 = db.names.size();
1824 db.subs.emplace_back();
1825 for (size_t k = k0; k < k1; ++k)
1826 db.subs.back().push_back(db.names[k]);
1827 if (db.try_to_parse_template_args && k1 == k0 + 1) {
1828 const char *t1 = parse_template_args(t, last, db);
1830 auto args = db.names.back().move_full();
1831 db.names.pop_back();
1832 db.names.back().first += std::move(args);
1833 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1842 if (first + 1 != last) {
1843 t = parse_source_name(first + 1, last, db);
1844 if (t != first + 1) {
1845 const char *t2 = parse_type(t, last, db);
1847 if (db.names.size() < 2)
1849 auto type = db.names.back().move_full();
1850 db.names.pop_back();
1851 if (db.names.back().first.substr(0, 9) != "objcproto") {
1852 db.names.back() = type + " " + db.names.back().move_full();
1854 auto proto = db.names.back().move_full();
1855 db.names.pop_back();
1856 t = parse_source_name(proto.data() + 9,
1857 proto.data() + proto.size(), db);
1858 if (t != proto.data() + 9) {
1860 type + "<" + db.names.back().move_full() + ">";
1862 db.names.push_back(type + " " + proto);
1865 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1872 if (first + 1 != last && first[1] == 't') {
1873 t = parse_name(first, last, db);
1875 if (db.names.empty())
1877 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1881 t = parse_substitution(first, last, db);
1884 // Parsed a substitution. If the substitution is a
1885 // <template-param> it might be followed by <template-args>.
1886 t = parse_template_args(first, last, db);
1888 if (db.names.size() < 2)
1890 auto template_args = db.names.back().move_full();
1891 db.names.pop_back();
1892 db.names.back().first += template_args;
1893 // Need to create substitution for <template-template-param>
1895 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1902 if (first + 1 != last) {
1905 size_t k0 = db.names.size();
1906 t = parse_type(first + 2, last, db);
1907 size_t k1 = db.names.size();
1908 if (t != first + 2) {
1909 db.subs.emplace_back();
1910 for (size_t k = k0; k < k1; ++k)
1911 db.subs.back().push_back(db.names[k]);
1919 t = parse_decltype(first, last, db);
1921 if (db.names.empty())
1923 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1929 t = parse_vector_type(first, last, db);
1931 if (db.names.empty())
1933 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1942 // must check for builtin-types before class-enum-types to avoid
1943 // ambiguities with operator-names
1944 t = parse_builtin_type(first, last, db);
1948 t = parse_name(first, last, db);
1950 if (db.names.empty())
1952 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1968 // ::= ad # & (unary)
1975 // ::= cv <type> # (cast)
1976 // ::= da # delete[]
1977 // ::= de # * (unary)
1988 // ::= li <source-name> # operator ""
1996 // ::= mm # -- (postfix in <expression> context)
1999 // ::= ng # - (unary)
2008 // ::= pp # ++ (postfix in <expression> context)
2009 // ::= ps # + (unary)
2016 // ::= v <digit> <source-name> # vendor extended
2020 static const char *parse_operator_name(const char *first, const char *last,
2022 if (last - first >= 2) {
2027 db.names.push_back("operator&&");
2032 db.names.push_back("operator&");
2036 db.names.push_back("operator&=");
2040 db.names.push_back("operator=");
2048 db.names.push_back("operator()");
2052 db.names.push_back("operator,");
2056 db.names.push_back("operator~");
2060 bool try_to_parse_template_args = db.try_to_parse_template_args;
2061 db.try_to_parse_template_args = false;
2062 const char *t = parse_type(first + 2, last, db);
2063 db.try_to_parse_template_args = try_to_parse_template_args;
2064 if (t != first + 2) {
2065 if (db.names.empty())
2067 db.names.back().first.insert(0, "operator ");
2068 db.parsed_ctor_dtor_cv = true;
2077 db.names.push_back("operator delete[]");
2081 db.names.push_back("operator*");
2085 db.names.push_back("operator delete");
2089 db.names.push_back("operator/");
2093 db.names.push_back("operator/=");
2101 db.names.push_back("operator^");
2105 db.names.push_back("operator^=");
2109 db.names.push_back("operator==");
2117 db.names.push_back("operator>=");
2121 db.names.push_back("operator>");
2127 if (first[1] == 'x') {
2128 db.names.push_back("operator[]");
2135 db.names.push_back("operator<=");
2139 const char *t = parse_source_name(first + 2, last, db);
2140 if (t != first + 2) {
2141 if (db.names.empty())
2143 db.names.back().first.insert(0, "operator\"\" ");
2148 db.names.push_back("operator<<");
2152 db.names.push_back("operator<<=");
2156 db.names.push_back("operator<");
2164 db.names.push_back("operator-");
2168 db.names.push_back("operator-=");
2172 db.names.push_back("operator*");
2176 db.names.push_back("operator*=");
2180 db.names.push_back("operator--");
2188 db.names.push_back("operator new[]");
2192 db.names.push_back("operator!=");
2196 db.names.push_back("operator-");
2200 db.names.push_back("operator!");
2204 db.names.push_back("operator new");
2212 db.names.push_back("operator||");
2216 db.names.push_back("operator|");
2220 db.names.push_back("operator|=");
2228 db.names.push_back("operator->*");
2232 db.names.push_back("operator+");
2236 db.names.push_back("operator+=");
2240 db.names.push_back("operator++");
2244 db.names.push_back("operator+");
2248 db.names.push_back("operator->");
2254 if (first[1] == 'u') {
2255 db.names.push_back("operator?");
2262 db.names.push_back("operator%");
2266 db.names.push_back("operator%=");
2270 db.names.push_back("operator>>");
2274 db.names.push_back("operator>>=");
2280 if (std::isdigit(first[1])) {
2281 const char *t = parse_source_name(first + 2, last, db);
2282 if (t != first + 2) {
2283 if (db.names.empty())
2285 db.names.back().first.insert(0, "operator ");
2296 static const char *parse_integer_literal(const char *first, const char *last,
2297 const std::string &lit, C &db) {
2298 const char *t = parse_number(first, last);
2299 if (t != first && t != last && *t == 'E') {
2301 db.names.push_back("(" + lit + ")");
2303 db.names.emplace_back();
2304 if (*first == 'n') {
2305 db.names.back().first += '-';
2308 db.names.back().first.append(first, t);
2309 if (lit.size() <= 3)
2310 db.names.back().first += lit;
2316 // <expr-primary> ::= L <type> <value number> E #
2318 // ::= L <type> <value float> E #
2320 // ::= L <string type> E #
2322 // ::= L <nullptr type> E #
2323 // nullptr literal (i.e., "LDnE")
2324 // ::= L <type> <real-part float> _ <imag-part float> E #
2325 // complex floating point literal (C 2000)
2326 // ::= L <mangled-name> E #
2330 static const char *parse_expr_primary(const char *first, const char *last,
2332 if (last - first >= 4 && *first == 'L') {
2335 const char *t = parse_integer_literal(first + 2, last, "wchar_t", db);
2340 if (first[3] == 'E') {
2343 db.names.push_back("false");
2347 db.names.push_back("true");
2354 const char *t = parse_integer_literal(first + 2, last, "char", db);
2359 const char *t = parse_integer_literal(first + 2, last, "signed char", db);
2365 parse_integer_literal(first + 2, last, "unsigned char", db);
2370 const char *t = parse_integer_literal(first + 2, last, "short", db);
2376 parse_integer_literal(first + 2, last, "unsigned short", db);
2381 const char *t = parse_integer_literal(first + 2, last, "", db);
2386 const char *t = parse_integer_literal(first + 2, last, "u", db);
2391 const char *t = parse_integer_literal(first + 2, last, "l", db);
2396 const char *t = parse_integer_literal(first + 2, last, "ul", db);
2401 const char *t = parse_integer_literal(first + 2, last, "ll", db);
2406 const char *t = parse_integer_literal(first + 2, last, "ull", db);
2411 const char *t = parse_integer_literal(first + 2, last, "__int128", db);
2417 parse_integer_literal(first + 2, last, "unsigned __int128", db);
2422 const char *t = parse_floating_number<float>(first + 2, last, db);
2427 const char *t = parse_floating_number<double>(first + 2, last, db);
2432 const char *t = parse_floating_number<long double>(first + 2, last, db);
2437 if (first[2] == 'Z') {
2438 const char *t = parse_encoding(first + 3, last, db);
2439 if (t != first + 3 && t != last && *t == 'E')
2444 // Invalid mangled name per
2445 // http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html
2448 // might be named type
2449 const char *t = parse_type(first + 1, last, db);
2450 if (t != first + 1 && t != last) {
2453 for (; n != last && isdigit(*n); ++n)
2455 if (n != t && n != last && *n == 'E') {
2456 if (db.names.empty())
2459 "(" + db.names.back().move_full() + ")" + std::string(t, n);
2474 static std::string base_name(std::string &s) {
2477 if (s == "std::string") {
2478 s = "std::basic_string<char, std::char_traits<char>, std::allocator<char> "
2480 return "basic_string";
2482 if (s == "std::istream") {
2483 s = "std::basic_istream<char, std::char_traits<char> >";
2484 return "basic_istream";
2486 if (s == "std::ostream") {
2487 s = "std::basic_ostream<char, std::char_traits<char> >";
2488 return "basic_ostream";
2490 if (s == "std::iostream") {
2491 s = "std::basic_iostream<char, std::char_traits<char> >";
2492 return "basic_iostream";
2494 const char *const pf = s.data();
2495 const char *pe = pf + s.size();
2496 if (pe[-1] == '>') {
2500 return std::string();
2501 if (pe[-1] == '<') {
2506 } else if (pe[-1] == '>')
2511 return std::string();
2512 const char *p0 = pe - 1;
2513 for (; p0 != pf; --p0) {
2519 return std::string(p0, pe);
2522 // <ctor-dtor-name> ::= C1 # complete object constructor
2523 // ::= C2 # base object constructor
2524 // ::= C3 # complete object allocating constructor
2525 // extension ::= C5 # ?
2526 // ::= D0 # deleting destructor
2527 // ::= D1 # complete object destructor
2528 // ::= D2 # base object destructor
2529 // extension ::= D5 # ?
2532 static const char *parse_ctor_dtor_name(const char *first, const char *last,
2534 if (last - first >= 2 && !db.names.empty()) {
2542 if (db.names.empty())
2544 db.names.push_back(base_name(db.names.back().first));
2546 db.parsed_ctor_dtor_cv = true;
2556 if (db.names.empty())
2558 db.names.push_back("~" + base_name(db.names.back().first));
2560 db.parsed_ctor_dtor_cv = true;
2569 // <unnamed-type-name> ::= Ut [ <nonnegative number> ] _
2570 // ::= <closure-type-name>
2572 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
2574 // <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda
2575 // has no parameters
2578 static const char *parse_unnamed_type_name(const char *first, const char *last,
2580 if (last - first > 2 && first[0] == 'U') {
2581 char type = first[1];
2584 db.names.push_back(std::string("'unnamed"));
2585 const char *t0 = first + 2;
2587 db.names.pop_back();
2590 if (std::isdigit(*t0)) {
2591 const char *t1 = t0 + 1;
2592 while (t1 != last && std::isdigit(*t1))
2594 db.names.back().first.append(t0, t1);
2597 db.names.back().first.push_back('\'');
2598 if (t0 == last || *t0 != '_') {
2599 db.names.pop_back();
2605 db.names.push_back(std::string("'lambda'("));
2606 const char *t0 = first + 2;
2607 if (first[2] == 'v') {
2608 db.names.back().first += ')';
2611 const char *t1 = parse_type(t0, last, db);
2613 if (!db.names.empty())
2614 db.names.pop_back();
2617 if (db.names.size() < 2)
2619 auto tmp = db.names.back().move_full();
2620 db.names.pop_back();
2621 db.names.back().first.append(tmp);
2624 t1 = parse_type(t0, last, db);
2627 if (db.names.size() < 2)
2629 tmp = db.names.back().move_full();
2630 db.names.pop_back();
2632 db.names.back().first.append(", ");
2633 db.names.back().first.append(tmp);
2637 if (db.names.empty())
2639 db.names.back().first.append(")");
2641 if (t0 == last || *t0 != 'E') {
2642 if (!db.names.empty())
2643 db.names.pop_back();
2648 if (!db.names.empty())
2649 db.names.pop_back();
2652 if (std::isdigit(*t0)) {
2653 const char *t1 = t0 + 1;
2654 while (t1 != last && std::isdigit(*t1))
2656 db.names.back().first.insert(db.names.back().first.begin() + 7, t0, t1);
2659 if (t0 == last || *t0 != '_') {
2660 if (!db.names.empty())
2661 db.names.pop_back();
2671 // <unqualified-name> ::= <operator-name>
2672 // ::= <ctor-dtor-name>
2673 // ::= <source-name>
2674 // ::= <unnamed-type-name>
2677 static const char *parse_unqualified_name(const char *first, const char *last,
2679 if (first != last) {
2684 t = parse_ctor_dtor_name(first, last, db);
2689 t = parse_unnamed_type_name(first, last, db);
2702 t = parse_source_name(first, last, db);
2707 t = parse_operator_name(first, last, db);
2716 // <unscoped-name> ::= <unqualified-name>
2717 // ::= St <unqualified-name> # ::std::
2718 // extension ::= StL<unqualified-name>
2721 static const char *parse_unscoped_name(const char *first, const char *last,
2723 if (last - first >= 2) {
2724 const char *t0 = first;
2726 if (first[0] == 'S' && first[1] == 't') {
2729 if (t0 != last && *t0 == 'L')
2732 const char *t1 = parse_unqualified_name(t0, last, db);
2735 if (db.names.empty())
2737 db.names.back().first.insert(0, "std::");
2745 // at <type> # alignof (a type)
2748 static const char *parse_alignof_type(const char *first, const char *last,
2750 if (last - first >= 3 && first[0] == 'a' && first[1] == 't') {
2751 const char *t = parse_type(first + 2, last, db);
2752 if (t != first + 2) {
2753 if (db.names.empty())
2755 db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
2762 // az <expression> # alignof (a
2766 static const char *parse_alignof_expr(const char *first, const char *last,
2768 if (last - first >= 3 && first[0] == 'a' && first[1] == 'z') {
2769 const char *t = parse_expression(first + 2, last, db);
2770 if (t != first + 2) {
2771 if (db.names.empty())
2773 db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
2781 static const char *parse_noexcept_expression(const char *first,
2782 const char *last, C &db) {
2783 const char *t1 = parse_expression(first, last, db);
2785 if (db.names.empty())
2787 db.names.back().first = "noexcept (" + db.names.back().move_full() + ")";
2794 static const char *parse_prefix_expression(const char *first, const char *last,
2795 const std::string &op,
2797 const char *t1 = parse_expression(first, last, db);
2799 if (db.names.empty())
2801 db.names.back().first = op + "(" + db.names.back().move_full() + ")";
2808 static const char *parse_binary_expression(const char *first, const char *last,
2809 const std::string &op,
2811 const char *t1 = parse_expression(first, last, db);
2813 const char *t2 = parse_expression(t1, last, db);
2815 if (db.names.size() < 2)
2817 auto op2 = db.names.back().move_full();
2818 db.names.pop_back();
2819 auto op1 = db.names.back().move_full();
2820 auto &nm = db.names.back().first;
2824 nm += "(" + op1 + ") " + op + " (" + op2 + ")";
2828 } else if (!db.names.empty())
2829 db.names.pop_back();
2834 // <expression> ::= <unary operator-name> <expression>
2835 // ::= <binary operator-name> <expression> <expression>
2836 // ::= <ternary operator-name> <expression> <expression>
2838 // ::= cl <expression>+ E # call
2839 // ::= cv <type> <expression> #
2840 // conversion with one argument
2841 // ::= cv <type> _ <expression>* E #
2842 // conversion with a different number of arguments
2843 // ::= [gs] nw <expression>* _ <type> E # new
2845 // ::= [gs] nw <expression>* _ <type> <initializer> # new
2846 // (expr-list) type (init)
2847 // ::= [gs] na <expression>* _ <type> E # new[]
2849 // ::= [gs] na <expression>* _ <type> <initializer> # new[]
2850 // (expr-list) type (init)
2851 // ::= [gs] dl <expression> #
2852 // delete expression
2853 // ::= [gs] da <expression> #
2854 // delete[] expression
2855 // ::= pp_ <expression> #
2857 // ::= mm_ <expression> #
2861 // ::= te <expression> #
2862 // typeid (expression)
2863 // ::= dc <type> <expression> #
2864 // dynamic_cast<type> (expression)
2865 // ::= sc <type> <expression> #
2866 // static_cast<type> (expression)
2867 // ::= cc <type> <expression> #
2868 // const_cast<type> (expression)
2869 // ::= rc <type> <expression> #
2870 // reinterpret_cast<type> (expression)
2873 // ::= sz <expression> #
2874 // sizeof (an expression)
2877 // ::= az <expression> #
2878 // alignof (an expression)
2879 // ::= nx <expression> #
2880 // noexcept (expression)
2881 // ::= <template-param>
2882 // ::= <function-param>
2883 // ::= dt <expression> <unresolved-name> #
2885 // ::= pt <expression> <unresolved-name> #
2887 // ::= ds <expression> <expression> #
2889 // ::= sZ <template-param> # size
2890 // of a parameter pack
2891 // ::= sZ <function-param> # size
2892 // of a function parameter pack
2893 // ::= sp <expression> # pack
2895 // ::= tw <expression> # throw
2898 // with no operand (rethrow)
2899 // ::= <unresolved-name> # f(p),
2912 // ::= <expr-primary>
2915 static const char *parse_expression(const char *first, const char *last,
2917 if (last - first >= 2) {
2918 const char *t = first;
2919 bool parsed_gs = false;
2920 if (last - first >= 4 && t[0] == 'g' && t[1] == 's') {
2926 first = parse_expr_primary(first, last, db);
2929 first = parse_template_param(first, last, db);
2932 first = parse_function_param(first, last, db);
2937 t = parse_binary_expression(first + 2, last, "&&", db);
2942 t = parse_prefix_expression(first + 2, last, "&", db);
2947 t = parse_binary_expression(first + 2, last, "&", db);
2952 t = parse_binary_expression(first + 2, last, "&=", db);
2957 t = parse_binary_expression(first + 2, last, "=", db);
2962 first = parse_alignof_type(first, last, db);
2965 first = parse_alignof_expr(first, last, db);
2972 first = parse_const_cast_expr(first, last, db);
2975 first = parse_call_expr(first, last, db);
2978 t = parse_binary_expression(first + 2, last, ",", db);
2983 t = parse_prefix_expression(first + 2, last, "~", db);
2988 first = parse_conversion_expr(first, last, db);
2995 const char *t1 = parse_expression(t + 2, last, db);
2997 if (db.names.empty())
2999 db.names.back().first =
3000 (parsed_gs ? std::string("::") : std::string()) + "delete[] " +
3001 db.names.back().move_full();
3006 first = parse_dynamic_cast_expr(first, last, db);
3009 t = parse_prefix_expression(first + 2, last, "*", db);
3014 const char *t1 = parse_expression(t + 2, last, db);
3016 if (db.names.empty())
3018 db.names.back().first =
3019 (parsed_gs ? std::string("::") : std::string()) + "delete " +
3020 db.names.back().move_full();
3025 return parse_unresolved_name(first, last, db);
3027 first = parse_dot_star_expr(first, last, db);
3030 first = parse_dot_expr(first, last, db);
3033 t = parse_binary_expression(first + 2, last, "/", db);
3038 t = parse_binary_expression(first + 2, last, "/=", db);
3047 t = parse_binary_expression(first + 2, last, "^", db);
3052 t = parse_binary_expression(first + 2, last, "^=", db);
3057 t = parse_binary_expression(first + 2, last, "==", db);
3066 t = parse_binary_expression(first + 2, last, ">=", db);
3071 t = parse_binary_expression(first + 2, last, ">", db);
3079 const char *t1 = parse_expression(first + 2, last, db);
3080 if (t1 != first + 2) {
3081 const char *t2 = parse_expression(t1, last, db);
3083 if (db.names.size() < 2)
3085 auto op2 = db.names.back().move_full();
3086 db.names.pop_back();
3087 auto op1 = db.names.back().move_full();
3088 db.names.back() = "(" + op1 + ")[" + op2 + "]";
3090 } else if (!db.names.empty())
3091 db.names.pop_back();
3098 t = parse_binary_expression(first + 2, last, "<=", db);
3103 t = parse_binary_expression(first + 2, last, "<<", db);
3108 t = parse_binary_expression(first + 2, last, "<<=", db);
3113 t = parse_binary_expression(first + 2, last, "<", db);
3122 t = parse_binary_expression(first + 2, last, "-", db);
3127 t = parse_binary_expression(first + 2, last, "-=", db);
3132 t = parse_binary_expression(first + 2, last, "*", db);
3137 t = parse_binary_expression(first + 2, last, "*=", db);
3142 if (first + 2 != last && first[2] == '_') {
3143 t = parse_prefix_expression(first + 3, last, "--", db);
3147 const char *t1 = parse_expression(first + 2, last, db);
3148 if (t1 != first + 2) {
3149 if (db.names.empty())
3151 db.names.back() = "(" + db.names.back().move_full() + ")--";
3162 first = parse_new_expr(first, last, db);
3165 t = parse_binary_expression(first + 2, last, "!=", db);
3170 t = parse_prefix_expression(first + 2, last, "-", db);
3175 t = parse_prefix_expression(first + 2, last, "!", db);
3180 t = parse_noexcept_expression(first + 2, last, db);
3189 return parse_unresolved_name(first, last, db);
3191 t = parse_binary_expression(first + 2, last, "||", db);
3196 t = parse_binary_expression(first + 2, last, "|", db);
3201 t = parse_binary_expression(first + 2, last, "|=", db);
3210 t = parse_binary_expression(first + 2, last, "->*", db);
3215 t = parse_binary_expression(first + 2, last, "+", db);
3220 t = parse_binary_expression(first + 2, last, "+=", db);
3225 if (first + 2 != last && first[2] == '_') {
3226 t = parse_prefix_expression(first + 3, last, "++", db);
3230 const char *t1 = parse_expression(first + 2, last, db);
3231 if (t1 != first + 2) {
3232 if (db.names.empty())
3234 db.names.back() = "(" + db.names.back().move_full() + ")++";
3240 t = parse_prefix_expression(first + 2, last, "+", db);
3245 first = parse_arrow_expr(first, last, db);
3251 const char *t1 = parse_expression(first + 2, last, db);
3252 if (t1 != first + 2) {
3253 const char *t2 = parse_expression(t1, last, db);
3255 const char *t3 = parse_expression(t2, last, db);
3257 if (db.names.size() < 3)
3259 auto op3 = db.names.back().move_full();
3260 db.names.pop_back();
3261 auto op2 = db.names.back().move_full();
3262 db.names.pop_back();
3263 auto op1 = db.names.back().move_full();
3264 db.names.back() = "(" + op1 + ") ? (" + op2 + ") : (" + op3 + ")";
3267 if (db.names.size() < 2)
3269 db.names.pop_back();
3270 db.names.pop_back();
3272 } else if (!db.names.empty())
3273 db.names.pop_back();
3280 first = parse_reinterpret_cast_expr(first, last, db);
3283 t = parse_binary_expression(first + 2, last, "%", db);
3288 t = parse_binary_expression(first + 2, last, "%=", db);
3293 t = parse_binary_expression(first + 2, last, ">>", db);
3298 t = parse_binary_expression(first + 2, last, ">>=", db);
3307 first = parse_static_cast_expr(first, last, db);
3310 first = parse_pack_expansion(first, last, db);
3313 return parse_unresolved_name(first, last, db);
3315 first = parse_sizeof_type_expr(first, last, db);
3318 first = parse_sizeof_expr_expr(first, last, db);
3321 if (last - t >= 3) {
3324 first = parse_sizeof_param_pack_expr(first, last, db);
3327 first = parse_sizeof_function_param_pack_expr(first, last, db);
3338 first = parse_typeid_expr(first, last, db);
3341 db.names.push_back("throw");
3345 first = parse_throw_expr(first, last, db);
3358 return parse_unresolved_name(first, last, db);
3364 // <template-arg> ::= <type> # type
3366 // ::= X <expression> E #
3368 // ::= <expr-primary> #
3369 // simple expressions
3370 // ::= J <template-arg>* E #
3372 // ::= LZ <encoding> E #
3376 static const char *parse_template_arg(const char *first, const char *last,
3378 if (first != last) {
3382 t = parse_expression(first + 1, last, db);
3383 if (t != first + 1) {
3384 if (t != last && *t == 'E')
3393 const char *t1 = parse_template_arg(t, last, db);
3401 // <expr-primary> or LZ <encoding> E
3402 if (first + 1 != last && first[1] == 'Z') {
3403 t = parse_encoding(first + 2, last, db);
3404 if (t != first + 2 && t != last && *t == 'E')
3407 first = parse_expr_primary(first, last, db);
3411 first = parse_type(first, last, db);
3418 // <template-args> ::= I <template-arg>* E
3419 // extension, the abi says <template-arg>+
3422 static const char *parse_template_args(const char *first, const char *last,
3424 if (last - first >= 2 && *first == 'I') {
3425 if (db.tag_templates)
3426 db.template_param.back().clear();
3427 const char *t = first + 1;
3428 std::string args("<");
3430 if (db.tag_templates)
3431 db.template_param.emplace_back();
3432 size_t k0 = db.names.size();
3433 const char *t1 = parse_template_arg(t, last, db);
3434 size_t k1 = db.names.size();
3435 if (db.tag_templates)
3436 db.template_param.pop_back();
3437 if (t1 == t || t1 == last)
3439 if (db.tag_templates) {
3440 db.template_param.back().emplace_back();
3441 for (size_t k = k0; k < k1; ++k)
3442 db.template_param.back().back().push_back(db.names[k]);
3444 for (size_t k = k0; k < k1; ++k) {
3445 if (args.size() > 1)
3447 args += db.names[k].move_full();
3449 for (; k1 > k0; --k1)
3450 if (!db.names.empty())
3451 db.names.pop_back();
3455 if (args.back() != '>')
3459 db.names.push_back(std::move(args));
3464 // <nested-name> ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix>
3465 // <unqualified-name> E
3466 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
3467 // <template-args> E
3469 // <prefix> ::= <prefix> <unqualified-name>
3470 // ::= <template-prefix> <template-args>
3471 // ::= <template-param>
3474 // ::= <substitution>
3475 // ::= <prefix> <data-member-prefix>
3478 // <template-prefix> ::= <prefix> <template unqualified-name>
3479 // ::= <template-param>
3480 // ::= <substitution>
3483 static const char *parse_nested_name(const char *first, const char *last, C &db,
3484 bool *ends_with_template_args) {
3485 if (first != last && *first == 'N') {
3487 const char *t0 = parse_cv_qualifiers(first + 1, last, cv);
3494 } else if (*t0 == 'O') {
3498 db.names.emplace_back();
3499 if (last - t0 >= 2 && t0[0] == 'S' && t0[1] == 't') {
3501 db.names.back().first = "std";
3504 db.names.pop_back();
3507 bool pop_subs = false;
3508 bool component_ends_with_template_args = false;
3509 while (*t0 != 'E') {
3510 component_ends_with_template_args = false;
3514 if (t0 + 1 != last && t0[1] == 't')
3515 goto do_parse_unqualified_name;
3516 t1 = parse_substitution(t0, last, db);
3517 if (t1 != t0 && t1 != last) {
3518 auto name = db.names.back().move_full();
3519 db.names.pop_back();
3520 if (db.names.empty())
3522 if (!db.names.back().first.empty()) {
3523 db.names.back().first += "::" + name;
3524 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3526 db.names.back().first = name;
3533 t1 = parse_template_param(t0, last, db);
3534 if (t1 != t0 && t1 != last) {
3535 auto name = db.names.back().move_full();
3536 db.names.pop_back();
3537 if (db.names.empty())
3539 if (!db.names.back().first.empty())
3540 db.names.back().first += "::" + name;
3542 db.names.back().first = name;
3543 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3550 if (t0 + 1 != last && t0[1] != 't' && t0[1] != 'T')
3551 goto do_parse_unqualified_name;
3552 t1 = parse_decltype(t0, last, db);
3553 if (t1 != t0 && t1 != last) {
3554 auto name = db.names.back().move_full();
3555 db.names.pop_back();
3556 if (db.names.empty())
3558 if (!db.names.back().first.empty())
3559 db.names.back().first += "::" + name;
3561 db.names.back().first = name;
3562 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3569 t1 = parse_template_args(t0, last, db);
3570 if (t1 != t0 && t1 != last) {
3571 auto name = db.names.back().move_full();
3572 db.names.pop_back();
3573 if (db.names.empty())
3575 db.names.back().first += name;
3576 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3578 component_ends_with_template_args = true;
3587 do_parse_unqualified_name:
3588 t1 = parse_unqualified_name(t0, last, db);
3589 if (t1 != t0 && t1 != last) {
3590 auto name = db.names.back().move_full();
3591 db.names.pop_back();
3592 if (db.names.empty())
3594 if (!db.names.back().first.empty())
3595 db.names.back().first += "::" + name;
3597 db.names.back().first = name;
3598 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3607 if (pop_subs && !db.subs.empty())
3609 if (ends_with_template_args)
3610 *ends_with_template_args = component_ends_with_template_args;
3615 // <discriminator> := _ <non-negative number> # when number < 10
3616 // := __ <non-negative number> _ # when number >= 10
3617 // extension := decimal-digit+ # at the end of string
3619 static const char *parse_discriminator(const char *first, const char *last) {
3620 // parse but ignore discriminator
3621 if (first != last) {
3622 if (*first == '_') {
3623 const char *t1 = first + 1;
3625 if (std::isdigit(*t1))
3627 else if (*t1 == '_') {
3628 for (++t1; t1 != last && std::isdigit(*t1); ++t1)
3630 if (t1 != last && *t1 == '_')
3634 } else if (std::isdigit(*first)) {
3635 const char *t1 = first + 1;
3636 for (; t1 != last && std::isdigit(*t1); ++t1)
3645 // <local-name> := Z <function encoding> E <entity name> [<discriminator>]
3646 // := Z <function encoding> E s [<discriminator>]
3647 // := Z <function encoding> Ed [ <parameter number> ] _ <entity
3651 static const char *parse_local_name(const char *first, const char *last, C &db,
3652 bool *ends_with_template_args) {
3653 if (first != last && *first == 'Z') {
3654 const char *t = parse_encoding(first + 1, last, db);
3655 if (t != first + 1 && t != last && *t == 'E' && ++t != last) {
3658 first = parse_discriminator(t + 1, last);
3659 if (db.names.empty())
3661 db.names.back().first.append("::string literal");
3665 const char *t1 = parse_number(t, last);
3666 if (t1 != last && *t1 == '_') {
3668 t1 = parse_name(t, last, db, ends_with_template_args);
3670 if (db.names.size() < 2)
3672 auto name = db.names.back().move_full();
3673 db.names.pop_back();
3674 if (db.names.empty())
3676 db.names.back().first.append("::");
3677 db.names.back().first.append(name);
3679 } else if (!db.names.empty())
3680 db.names.pop_back();
3685 const char *t1 = parse_name(t, last, db, ends_with_template_args);
3687 // parse but ignore discriminator
3688 first = parse_discriminator(t1, last);
3689 if (db.names.size() < 2)
3691 auto name = db.names.back().move_full();
3692 db.names.pop_back();
3693 if (db.names.empty())
3695 db.names.back().first.append("::");
3696 db.names.back().first.append(name);
3697 } else if (!db.names.empty())
3698 db.names.pop_back();
3706 // <name> ::= <nested-name> // N
3707 // ::= <local-name> # See Scope Encoding below // Z
3708 // ::= <unscoped-template-name> <template-args>
3709 // ::= <unscoped-name>
3711 // <unscoped-template-name> ::= <unscoped-name>
3712 // ::= <substitution>
3715 static const char *parse_name(const char *first, const char *last, C &db,
3716 bool *ends_with_template_args) {
3717 if (last - first >= 2) {
3718 const char *t0 = first;
3719 // extension: ignore L here
3724 const char *t1 = parse_nested_name(t0, last, db, ends_with_template_args);
3730 const char *t1 = parse_local_name(t0, last, db, ends_with_template_args);
3736 const char *t1 = parse_unscoped_name(t0, last, db);
3739 *t1 == 'I') // <unscoped-template-name> <template-args>
3741 if (db.names.empty())
3743 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3745 t1 = parse_template_args(t0, last, db);
3747 if (db.names.size() < 2)
3749 auto tmp = db.names.back().move_full();
3750 db.names.pop_back();
3751 if (db.names.empty())
3753 db.names.back().first += tmp;
3755 if (ends_with_template_args)
3756 *ends_with_template_args = true;
3758 } else // <unscoped-name>
3760 } else { // try <substitution> <template-args>
3761 t1 = parse_substitution(t0, last, db);
3762 if (t1 != t0 && t1 != last && *t1 == 'I') {
3764 t1 = parse_template_args(t0, last, db);
3766 if (db.names.size() < 2)
3768 auto tmp = db.names.back().move_full();
3769 db.names.pop_back();
3770 if (db.names.empty())
3772 db.names.back().first += tmp;
3774 if (ends_with_template_args)
3775 *ends_with_template_args = true;
3786 // <call-offset> ::= h <nv-offset> _
3787 // ::= v <v-offset> _
3789 // <nv-offset> ::= <offset number>
3790 // # non-virtual base override
3792 // <v-offset> ::= <offset number> _ <virtual offset number>
3793 // # virtual base override, with vcall offset
3795 static const char *parse_call_offset(const char *first, const char *last) {
3796 if (first != last) {
3799 const char *t = parse_number(first + 1, last);
3800 if (t != first + 1 && t != last && *t == '_')
3804 const char *t = parse_number(first + 1, last);
3805 if (t != first + 1 && t != last && *t == '_') {
3806 const char *t2 = parse_number(++t, last);
3807 if (t2 != t && t2 != last && *t2 == '_')
3816 // <special-name> ::= TV <type> # virtual table
3817 // ::= TT <type> # VTT structure (construction vtable index)
3818 // ::= TI <type> # typeinfo structure
3819 // ::= TS <type> # typeinfo name (null-terminated byte string)
3820 // ::= Tc <call-offset> <call-offset> <base encoding>
3821 // # base is the nominal target function of thunk
3822 // # first call-offset is 'this' adjustment
3823 // # second call-offset is result adjustment
3824 // ::= T <call-offset> <base encoding>
3825 // # base is the nominal target function of thunk
3826 // ::= GV <object name> # Guard variable for one-time
3829 // extension ::= TC <first type> <number> _ <second type> # construction
3830 // vtable for second-in-first
3831 // extension ::= GR <object name> # reference temporary for object
3834 static const char *parse_special_name(const char *first, const char *last,
3836 if (last - first > 2) {
3842 // TV <type> # virtual table
3843 t = parse_type(first + 2, last, db);
3844 if (t != first + 2) {
3845 if (db.names.empty())
3847 db.names.back().first.insert(0, "vtable for ");
3852 // TT <type> # VTT structure (construction vtable index)
3853 t = parse_type(first + 2, last, db);
3854 if (t != first + 2) {
3855 if (db.names.empty())
3857 db.names.back().first.insert(0, "VTT for ");
3862 // TI <type> # typeinfo structure
3863 t = parse_type(first + 2, last, db);
3864 if (t != first + 2) {
3865 if (db.names.empty())
3867 db.names.back().first.insert(0, "typeinfo for ");
3872 // TS <type> # typeinfo name (null-terminated byte string)
3873 t = parse_type(first + 2, last, db);
3874 if (t != first + 2) {
3875 if (db.names.empty())
3877 db.names.back().first.insert(0, "typeinfo name for ");
3882 // Tc <call-offset> <call-offset> <base encoding>
3884 const char *t0 = parse_call_offset(first + 2, last);
3885 if (t0 == first + 2)
3887 const char *t1 = parse_call_offset(t0, last);
3890 t = parse_encoding(t1, last, db);
3892 if (db.names.empty())
3894 db.names.back().first.insert(0, "covariant return thunk to ");
3900 // extension ::= TC <first type> <number> _ <second type> # construction
3901 // vtable for second-in-first
3902 t = parse_type(first + 2, last, db);
3903 if (t != first + 2) {
3904 const char *t0 = parse_number(t, last);
3905 if (t0 != t && t0 != last && *t0 == '_') {
3906 const char *t1 = parse_type(++t0, last, db);
3908 if (db.names.size() < 2)
3910 auto left = db.names.back().move_full();
3911 db.names.pop_back();
3912 if (db.names.empty())
3914 db.names.back().first = "construction vtable for " +
3915 std::move(left) + "-in-" +
3916 db.names.back().move_full();
3923 // T <call-offset> <base encoding>
3925 const char *t0 = parse_call_offset(first + 1, last);
3926 if (t0 == first + 1)
3928 t = parse_encoding(t0, last, db);
3930 if (db.names.empty())
3932 if (first[1] == 'v') {
3933 db.names.back().first.insert(0, "virtual thunk to ");
3936 db.names.back().first.insert(0, "non-virtual thunk to ");
3947 // GV <object name> # Guard variable for one-time initialization
3948 t = parse_name(first + 2, last, db);
3949 if (t != first + 2) {
3950 if (db.names.empty())
3952 db.names.back().first.insert(0, "guard variable for ");
3957 // extension ::= GR <object name> # reference temporary for object
3958 t = parse_name(first + 2, last, db);
3959 if (t != first + 2) {
3960 if (db.names.empty())
3962 db.names.back().first.insert(0, "reference temporary for ");
3974 template <class T> class save_value {
3979 save_value(T &restore) : restore_(restore), original_value_(restore) {}
3981 ~save_value() { restore_ = std::move(original_value_); }
3983 save_value(const save_value &) = delete;
3984 save_value &operator=(const save_value &) = delete;
3988 // <encoding> ::= <function name> <bare-function-type>
3990 // ::= <special-name>
3993 static const char *parse_encoding(const char *first, const char *last, C &db) {
3994 if (first != last) {
3995 save_value<decltype(db.encoding_depth)> su(db.encoding_depth);
3996 ++db.encoding_depth;
3997 save_value<decltype(db.tag_templates)> sb(db.tag_templates);
3998 if (db.encoding_depth > 1)
3999 db.tag_templates = true;
4003 first = parse_special_name(first, last, db);
4006 bool ends_with_template_args = false;
4007 const char *t = parse_name(first, last, db, &ends_with_template_args);
4008 unsigned cv = db.cv;
4009 unsigned ref = db.ref;
4011 if (t != last && *t != 'E' && *t != '.') {
4012 save_value<bool> sb2(db.tag_templates);
4013 db.tag_templates = false;
4016 if (db.names.empty())
4018 const std::string &nm = db.names.back().first;
4021 if (!db.parsed_ctor_dtor_cv && ends_with_template_args) {
4022 t2 = parse_type(t, last, db);
4025 if (db.names.size() < 2)
4027 auto ret1 = std::move(db.names.back().first);
4028 ret2 = std::move(db.names.back().second);
4031 db.names.pop_back();
4032 if (db.names.empty())
4035 db.names.back().first.insert(0, ret1);
4038 db.names.back().first += '(';
4039 if (t != last && *t == 'v') {
4042 bool first_arg = true;
4044 size_t k0 = db.names.size();
4045 t2 = parse_type(t, last, db);
4046 size_t k1 = db.names.size();
4051 for (size_t k = k0; k < k1; ++k) {
4054 tmp += db.names[k].move_full();
4056 for (size_t k = k0; k < k1; ++k) {
4057 if (db.names.empty())
4059 db.names.pop_back();
4062 if (db.names.empty())
4065 db.names.back().first += ", ";
4068 db.names.back().first += tmp;
4074 if (db.names.empty())
4076 db.names.back().first += ')';
4078 db.names.back().first.append(" const");
4080 db.names.back().first.append(" volatile");
4082 db.names.back().first.append(" restrict");
4084 db.names.back().first.append(" &");
4086 db.names.back().first.append(" &&");
4087 db.names.back().first += ret2;
4100 // _block_invoke<decimal-digit>+
4101 // _block_invoke_<decimal-digit>+
4104 static const char *parse_block_invoke(const char *first, const char *last,
4106 if (last - first >= 13) {
4107 const char test[] = "_block_invoke";
4108 const char *t = first;
4109 for (int i = 0; i < 13; ++i, ++t) {
4115 // must have at least 1 decimal digit
4116 if (++t == last || !std::isdigit(*t))
4120 // parse zero or more digits
4121 while (t != last && isdigit(*t))
4124 if (db.names.empty())
4126 db.names.back().first.insert(0, "invocation function for block in ");
4133 // <dot-suffix> := .<anything and everything>
4136 static const char *parse_dot_suffix(const char *first, const char *last,
4138 if (first != last && *first == '.') {
4139 if (db.names.empty())
4141 db.names.back().first += " (" + std::string(first, last) + ")";
4147 // <block-involcaton-function> ___Z<encoding>_block_invoke
4148 // <block-involcaton-function> ___Z<encoding>_block_invoke<decimal-digit>+
4149 // <block-involcaton-function> ___Z<encoding>_block_invoke_<decimal-digit>+
4150 // <mangled-name> ::= _Z<encoding>
4154 static void demangle(const char *first, const char *last, C &db, int &status) {
4155 if (first >= last) {
4156 status = invalid_mangled_name;
4159 if (*first == '_') {
4160 if (last - first >= 4) {
4161 if (first[1] == 'Z') {
4162 const char *t = parse_encoding(first + 2, last, db);
4163 if (t != first + 2 && t != last && *t == '.')
4164 t = parse_dot_suffix(t, last, db);
4166 status = invalid_mangled_name;
4167 } else if (first[1] == '_' && first[2] == '_' && first[3] == 'Z') {
4168 const char *t = parse_encoding(first + 4, last, db);
4169 if (t != first + 4 && t != last) {
4170 const char *t1 = parse_block_invoke(t, last, db);
4172 status = invalid_mangled_name;
4174 status = invalid_mangled_name;
4176 status = invalid_mangled_name;
4178 status = invalid_mangled_name;
4180 const char *t = parse_type(first, last, db);
4182 status = invalid_mangled_name;
4184 if (status == success && db.names.empty())
4185 status = invalid_mangled_name;
4189 template <class StrT> struct string_pair {
4193 string_pair() = default;
4194 string_pair(StrT f) : first(std::move(f)) {}
4195 string_pair(StrT f, StrT s) : first(std::move(f)), second(std::move(s)) {}
4196 template <size_t N> string_pair(const char (&s)[N]) : first(s, N - 1) {}
4198 size_t size() const { return first.size() + second.size(); }
4199 StrT full() const { return first + second; }
4200 StrT move_full() { return std::move(first) + std::move(second); }
4204 typedef std::vector<string_pair<std::string>> sub_type;
4205 typedef std::vector<sub_type> template_param_type;
4207 template_param_type subs;
4208 std::vector<template_param_type> template_param;
4211 unsigned encoding_depth = 0;
4212 bool parsed_ctor_dtor_cv = false;
4213 bool tag_templates = true;
4214 bool fix_forward_references = false;
4215 bool try_to_parse_template_args = true;
4217 Db() : subs(0, names), template_param(0, subs) {}
4221 char *llvm::itaniumDemangle(const char *mangled_name, char *buf, size_t *n,
4223 if (mangled_name == nullptr || (buf != nullptr && n == nullptr)) {
4225 *status = invalid_args;
4229 size_t len = std::strlen(mangled_name);
4230 if (len < 2 || strncmp(mangled_name, "_Z", 2)) {
4231 if (len < 4 || strncmp(mangled_name, "___Z", 4)) {
4233 *status = invalid_mangled_name;
4238 size_t internal_size = buf != nullptr ? *n : 0;
4240 db.template_param.emplace_back();
4241 int internal_status = success;
4242 demangle(mangled_name, mangled_name + len, db, internal_status);
4243 if (internal_status == success && db.fix_forward_references &&
4244 !db.template_param.empty() && !db.template_param.front().empty()) {
4245 db.fix_forward_references = false;
4246 db.tag_templates = false;
4249 demangle(mangled_name, mangled_name + len, db, internal_status);
4250 if (db.fix_forward_references)
4251 internal_status = invalid_mangled_name;
4253 if (internal_status == success) {
4254 size_t sz = db.names.back().size() + 1;
4255 if (sz > internal_size) {
4256 char *newbuf = static_cast<char *>(std::realloc(buf, sz));
4257 if (newbuf == nullptr) {
4258 internal_status = memory_alloc_failure;
4266 if (buf != nullptr) {
4267 db.names.back().first += db.names.back().second;
4268 std::memcpy(buf, db.names.back().first.data(), sz - 1);
4269 buf[sz - 1] = char(0);
4274 *status = internal_status;