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
41 CV_volatile = (1 << 1),
42 CV_restrict = (1 << 2),
46 static const char *parse_type(const char *first, const char *last, C &db);
48 static const char *parse_encoding(const char *first, const char *last, C &db);
50 static const char *parse_name(const char *first, const char *last, C &db,
51 bool *ends_with_template_args = 0);
53 static const char *parse_expression(const char *first, const char *last, C &db);
55 static const char *parse_template_args(const char *first, const char *last,
58 static const char *parse_operator_name(const char *first, const char *last,
61 static const char *parse_unqualified_name(const char *first, const char *last,
64 static const char *parse_decltype(const char *first, const char *last, C &db);
66 // <number> ::= [n] <non-negative decimal integer>
68 static const char *parse_number(const char *first, const char *last) {
70 const char *t = first;
76 } else if ('1' <= *t && *t <= '9') {
78 while (first != last && std::isdigit(*first))
87 template <class Float> struct float_data;
89 template <> struct float_data<float> {
90 static const size_t mangled_size = 8;
91 static const size_t max_demangled_size = 24;
92 static const char *spec;
94 const char *float_data<float>::spec = "%af";
96 template <> struct float_data<double> {
97 static const size_t mangled_size = 16;
98 static const size_t max_demangled_size = 32;
99 static const char *spec;
102 const char *float_data<double>::spec = "%a";
104 template <> struct float_data<long double> {
105 #if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \
107 static const size_t mangled_size = 32;
108 #elif defined(__arm__) || defined(__mips__) || defined(__hexagon__)
109 static const size_t mangled_size = 16;
111 static const size_t mangled_size =
112 20; // May need to be adjusted to 16 or 24 on other platforms
114 static const size_t max_demangled_size = 40;
115 static const char *spec;
118 const char *float_data<long double>::spec = "%LaL";
121 template <class Float, class C>
122 static const char *parse_floating_number(const char *first, const char *last,
124 const size_t N = float_data<Float>::mangled_size;
125 if (static_cast<std::size_t>(last - first) > N) {
129 char buf[sizeof(Float)];
131 const char *t = first;
133 for (; t != last; ++t, ++e) {
136 unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
137 : static_cast<unsigned>(*t - 'a' + 10);
139 unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
140 : static_cast<unsigned>(*t - 'a' + 10);
141 *e = static_cast<char>((d1 << 4) + d0);
144 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
145 std::reverse(buf, e);
147 char num[float_data<Float>::max_demangled_size] = {0};
148 int n = snprintf(num, sizeof(num), float_data<Float>::spec, value);
149 if (static_cast<std::size_t>(n) >= sizeof(num))
151 db.names.push_back(std::string(num, static_cast<std::size_t>(n)));
158 // <source-name> ::= <positive length number> <identifier>
161 static const char *parse_source_name(const char *first, const char *last,
165 if (isdigit(c) && first + 1 != last) {
166 const char *t = first + 1;
167 size_t n = static_cast<size_t>(c - '0');
168 for (c = *t; isdigit(c); c = *t) {
169 n = n * 10 + static_cast<size_t>(c - '0');
173 if (static_cast<size_t>(last - t) >= n) {
175 if (r.substr(0, 10) == "_GLOBAL__N")
176 db.names.push_back("(anonymous namespace)");
178 db.names.push_back(std::move(r));
186 // <substitution> ::= S <seq-id> _
188 // <substitution> ::= Sa # ::std::allocator
189 // <substitution> ::= Sb # ::std::basic_string
190 // <substitution> ::= Ss # ::std::basic_string < char,
191 // ::std::char_traits<char>,
192 // ::std::allocator<char> >
193 // <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> >
194 // <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> >
195 // <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >
198 static const char *parse_substitution(const char *first, const char *last,
200 if (last - first >= 2) {
204 db.names.push_back("std::allocator");
208 db.names.push_back("std::basic_string");
212 db.names.push_back("std::string");
216 db.names.push_back("std::istream");
220 db.names.push_back("std::ostream");
224 db.names.push_back("std::iostream");
228 if (!db.subs.empty()) {
229 for (const auto &n : db.subs.front())
230 db.names.push_back(n);
235 if (std::isdigit(first[1]) || std::isupper(first[1])) {
237 const char *t = first + 1;
238 if (std::isdigit(*t))
239 sub = static_cast<size_t>(*t - '0');
241 sub = static_cast<size_t>(*t - 'A') + 10;
242 for (++t; t != last && (std::isdigit(*t) || std::isupper(*t)); ++t) {
244 if (std::isdigit(*t))
245 sub += static_cast<size_t>(*t - '0');
247 sub += static_cast<size_t>(*t - 'A') + 10;
249 if (t == last || *t != '_')
252 if (sub < db.subs.size()) {
253 for (const auto &n : db.subs[sub])
254 db.names.push_back(n);
265 // <builtin-type> ::= v # void
269 // ::= a # signed char
270 // ::= h # unsigned char
272 // ::= t # unsigned short
274 // ::= j # unsigned int
276 // ::= m # unsigned long
277 // ::= x # long long, __int64
278 // ::= y # unsigned long long, __int64
280 // ::= o # unsigned __int128
283 // ::= e # long double, __float80
284 // ::= g # __float128
286 // ::= Dd # IEEE 754r decimal floating point (64 bits)
287 // ::= De # IEEE 754r decimal floating point (128 bits)
288 // ::= Df # IEEE 754r decimal floating point (32 bits)
289 // ::= Dh # IEEE 754r half-precision floating point (16 bits)
292 // ::= Da # auto (in dependent new-expressions)
293 // ::= Dc # decltype(auto)
294 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
295 // ::= u <source-name> # vendor extended type
298 static const char *parse_builtin_type(const char *first, const char *last,
303 db.names.push_back("void");
307 db.names.push_back("wchar_t");
311 db.names.push_back("bool");
315 db.names.push_back("char");
319 db.names.push_back("signed char");
323 db.names.push_back("unsigned char");
327 db.names.push_back("short");
331 db.names.push_back("unsigned short");
335 db.names.push_back("int");
339 db.names.push_back("unsigned int");
343 db.names.push_back("long");
347 db.names.push_back("unsigned long");
351 db.names.push_back("long long");
355 db.names.push_back("unsigned long long");
359 db.names.push_back("__int128");
363 db.names.push_back("unsigned __int128");
367 db.names.push_back("float");
371 db.names.push_back("double");
375 db.names.push_back("long double");
379 db.names.push_back("__float128");
383 db.names.push_back("...");
387 const char *t = parse_source_name(first + 1, last, db);
392 if (first + 1 != last) {
395 db.names.push_back("decimal64");
399 db.names.push_back("decimal128");
403 db.names.push_back("decimal32");
407 db.names.push_back("decimal16");
411 db.names.push_back("char32_t");
415 db.names.push_back("char16_t");
419 db.names.push_back("auto");
423 db.names.push_back("decltype(auto)");
427 db.names.push_back("std::nullptr_t");
438 // <CV-qualifiers> ::= [r] [V] [K]
440 static const char *parse_cv_qualifiers(const char *first, const char *last,
460 // <template-param> ::= T_ # first template parameter
461 // ::= T <parameter-2 non-negative number> _
464 static const char *parse_template_param(const char *first, const char *last,
466 if (last - first >= 2) {
468 if (first[1] == '_') {
469 if (db.template_param.empty())
471 if (!db.template_param.back().empty()) {
472 for (auto &t : db.template_param.back().front())
473 db.names.push_back(t);
476 db.names.push_back("T_");
478 db.fix_forward_references = true;
480 } else if (isdigit(first[1])) {
481 const char *t = first + 1;
482 size_t sub = static_cast<size_t>(*t - '0');
483 for (++t; t != last && isdigit(*t); ++t) {
485 sub += static_cast<size_t>(*t - '0');
487 if (t == last || *t != '_' || db.template_param.empty())
490 if (sub < db.template_param.back().size()) {
491 for (auto &temp : db.template_param.back()[sub])
492 db.names.push_back(temp);
495 db.names.push_back(std::string(first, t + 1));
497 db.fix_forward_references = true;
505 // cc <type> <expression> # const_cast<type>
509 static const char *parse_const_cast_expr(const char *first, const char *last,
511 if (last - first >= 3 && first[0] == 'c' && first[1] == 'c') {
512 const char *t = parse_type(first + 2, last, db);
513 if (t != first + 2) {
514 const char *t1 = parse_expression(t, last, db);
516 if (db.names.size() < 2)
518 auto expr = db.names.back().move_full();
520 if (db.names.empty())
523 "const_cast<" + db.names.back().move_full() + ">(" + expr + ")";
531 // dc <type> <expression> # dynamic_cast<type>
535 static const char *parse_dynamic_cast_expr(const char *first, const char *last,
537 if (last - first >= 3 && first[0] == 'd' && first[1] == 'c') {
538 const char *t = parse_type(first + 2, last, db);
539 if (t != first + 2) {
540 const char *t1 = parse_expression(t, last, db);
542 if (db.names.size() < 2)
544 auto expr = db.names.back().move_full();
546 if (db.names.empty())
549 "dynamic_cast<" + db.names.back().move_full() + ">(" + expr + ")";
557 // rc <type> <expression> # reinterpret_cast<type>
561 static const char *parse_reinterpret_cast_expr(const char *first,
562 const char *last, C &db) {
563 if (last - first >= 3 && first[0] == 'r' && first[1] == 'c') {
564 const char *t = parse_type(first + 2, last, db);
565 if (t != first + 2) {
566 const char *t1 = parse_expression(t, last, db);
568 if (db.names.size() < 2)
570 auto expr = db.names.back().move_full();
572 if (db.names.empty())
574 db.names.back() = "reinterpret_cast<" + db.names.back().move_full() +
583 // sc <type> <expression> # static_cast<type>
587 static const char *parse_static_cast_expr(const char *first, const char *last,
589 if (last - first >= 3 && first[0] == 's' && first[1] == 'c') {
590 const char *t = parse_type(first + 2, last, db);
591 if (t != first + 2) {
592 const char *t1 = parse_expression(t, last, db);
594 if (db.names.size() < 2)
596 auto expr = db.names.back().move_full();
599 "static_cast<" + db.names.back().move_full() + ">(" + expr + ")";
607 // sp <expression> # pack expansion
610 static const char *parse_pack_expansion(const char *first, const char *last,
612 if (last - first >= 3 && first[0] == 's' && first[1] == 'p') {
613 const char *t = parse_expression(first + 2, last, db);
620 // st <type> # sizeof (a type)
623 static const char *parse_sizeof_type_expr(const char *first, const char *last,
625 if (last - first >= 3 && first[0] == 's' && first[1] == 't') {
626 const char *t = parse_type(first + 2, last, db);
627 if (t != first + 2) {
628 if (db.names.empty())
630 db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
637 // sz <expr> # sizeof (a expression)
640 static const char *parse_sizeof_expr_expr(const char *first, const char *last,
642 if (last - first >= 3 && first[0] == 's' && first[1] == 'z') {
643 const char *t = parse_expression(first + 2, last, db);
644 if (t != first + 2) {
645 if (db.names.empty())
647 db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
654 // sZ <template-param> # size of a parameter
658 static const char *parse_sizeof_param_pack_expr(const char *first,
659 const char *last, C &db) {
660 if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
662 size_t k0 = db.names.size();
663 const char *t = parse_template_param(first + 2, last, db);
664 size_t k1 = db.names.size();
665 if (t != first + 2) {
666 std::string tmp("sizeof...(");
669 tmp += db.names[k].move_full();
670 for (++k; k != k1; ++k)
671 tmp += ", " + db.names[k].move_full();
674 for (; k1 != k0; --k1)
676 db.names.push_back(std::move(tmp));
683 // <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, first parameter
684 // ::= fp <top-level CV-qualifiers> <parameter-2 non-negative
685 // number> _ # L == 0, second and later parameters
686 // ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
687 // _ # L > 0, first parameter
688 // ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
689 // <parameter-2 non-negative number> _ # L > 0, second and
693 static const char *parse_function_param(const char *first, const char *last,
695 if (last - first >= 3 && *first == 'f') {
696 if (first[1] == 'p') {
698 const char *t = parse_cv_qualifiers(first + 2, last, cv);
699 const char *t1 = parse_number(t, last);
700 if (t1 != last && *t1 == '_') {
701 db.names.push_back("fp" + std::string(t, t1));
704 } else if (first[1] == 'L') {
706 const char *t0 = parse_number(first + 2, last);
707 if (t0 != last && *t0 == 'p') {
709 const char *t = parse_cv_qualifiers(t0, last, cv);
710 const char *t1 = parse_number(t, last);
711 if (t1 != last && *t1 == '_') {
712 db.names.push_back("fp" + std::string(t, t1));
721 // sZ <function-param> # size of a function
725 static const char *parse_sizeof_function_param_pack_expr(const char *first,
728 if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
730 const char *t = parse_function_param(first + 2, last, db);
731 if (t != first + 2) {
732 if (db.names.empty())
734 db.names.back() = "sizeof...(" + db.names.back().move_full() + ")";
741 // te <expression> # typeid (expression)
742 // ti <type> # typeid (type)
745 static const char *parse_typeid_expr(const char *first, const char *last,
747 if (last - first >= 3 && first[0] == 't' &&
748 (first[1] == 'e' || first[1] == 'i')) {
751 t = parse_expression(first + 2, last, db);
753 t = parse_type(first + 2, last, db);
754 if (t != first + 2) {
755 if (db.names.empty())
757 db.names.back() = "typeid(" + db.names.back().move_full() + ")";
764 // tw <expression> # throw expression
767 static const char *parse_throw_expr(const char *first, const char *last,
769 if (last - first >= 3 && first[0] == 't' && first[1] == 'w') {
770 const char *t = parse_expression(first + 2, last, db);
771 if (t != first + 2) {
772 if (db.names.empty())
774 db.names.back() = "throw " + db.names.back().move_full();
781 // ds <expression> <expression> # expr.*expr
784 static const char *parse_dot_star_expr(const char *first, const char *last,
786 if (last - first >= 3 && first[0] == 'd' && first[1] == 's') {
787 const char *t = parse_expression(first + 2, last, db);
788 if (t != first + 2) {
789 const char *t1 = parse_expression(t, last, db);
791 if (db.names.size() < 2)
793 auto expr = db.names.back().move_full();
795 db.names.back().first += ".*" + expr;
803 // <simple-id> ::= <source-name> [ <template-args> ]
806 static const char *parse_simple_id(const char *first, const char *last, C &db) {
808 const char *t = parse_source_name(first, last, db);
810 const char *t1 = parse_template_args(t, last, db);
812 if (db.names.size() < 2)
814 auto args = db.names.back().move_full();
816 db.names.back().first += std::move(args);
825 // <unresolved-type> ::= <template-param>
827 // ::= <substitution>
830 static const char *parse_unresolved_type(const char *first, const char *last,
833 const char *t = first;
836 size_t k0 = db.names.size();
837 t = parse_template_param(first, last, db);
838 size_t k1 = db.names.size();
839 if (t != first && k1 == k0 + 1) {
840 db.subs.push_back(typename C::sub_type(1, db.names.back()));
843 for (; k1 != k0; --k1)
849 t = parse_decltype(first, last, db);
851 if (db.names.empty())
853 db.subs.push_back(typename C::sub_type(1, db.names.back()));
858 t = parse_substitution(first, last, db);
862 if (last - first > 2 && first[1] == 't') {
863 t = parse_unqualified_name(first + 2, last, db);
864 if (t != first + 2) {
865 if (db.names.empty())
867 db.names.back().first.insert(0, "std::");
868 db.subs.push_back(typename C::sub_type(1, db.names.back()));
879 // <destructor-name> ::= <unresolved-type> # e.g.,
880 // ~T or ~decltype(f())
881 // ::= <simple-id> # e.g.,
885 static const char *parse_destructor_name(const char *first, const char *last,
888 const char *t = parse_unresolved_type(first, last, db);
890 t = parse_simple_id(first, last, db);
892 if (db.names.empty())
894 db.names.back().first.insert(0, "~");
901 // <base-unresolved-name> ::= <simple-id> #
903 // extension ::= <operator-name> #
904 // unresolved operator-function-id
905 // extension ::= <operator-name> <template-args> #
906 // unresolved operator template-id
907 // ::= on <operator-name> #
908 // unresolved operator-function-id
909 // ::= on <operator-name> <template-args> #
910 // unresolved operator template-id
911 // ::= dn <destructor-name> #
912 // destructor or pseudo-destructor;
919 static const char *parse_base_unresolved_name(const char *first,
920 const char *last, C &db) {
921 if (last - first >= 2) {
922 if ((first[0] == 'o' || first[0] == 'd') && first[1] == 'n') {
923 if (first[0] == 'o') {
924 const char *t = parse_operator_name(first + 2, last, db);
925 if (t != first + 2) {
926 first = parse_template_args(t, last, db);
928 if (db.names.size() < 2)
930 auto args = db.names.back().move_full();
932 db.names.back().first += std::move(args);
936 const char *t = parse_destructor_name(first + 2, last, db);
941 const char *t = parse_simple_id(first, last, db);
943 t = parse_operator_name(first, last, db);
945 first = parse_template_args(t, last, db);
947 if (db.names.size() < 2)
949 auto args = db.names.back().move_full();
951 db.names.back().first += std::move(args);
961 // <unresolved-qualifier-level> ::= <simple-id>
964 static const char *parse_unresolved_qualifier_level(const char *first,
965 const char *last, C &db) {
966 return parse_simple_id(first, last, db);
970 // extension ::= srN <unresolved-type> [<template-args>]
971 // <unresolved-qualifier-level>* E <base-unresolved-name>
972 // ::= [gs] <base-unresolved-name> # x or
974 // ::= [gs] sr <unresolved-qualifier-level>+ E
975 // <base-unresolved-name>
983 // ::= sr <unresolved-type> <base-unresolved-name> # T::x
985 // extension ::= sr <unresolved-type> <template-args>
986 // <base-unresolved-name>
989 // /decltype(p)::N::x
990 // (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
991 // <base-unresolved-name>
994 static const char *parse_unresolved_name(const char *first, const char *last,
996 if (last - first > 2) {
997 const char *t = first;
999 if (t[0] == 'g' && t[1] == 's') {
1003 const char *t2 = parse_base_unresolved_name(t, last, db);
1006 if (db.names.empty())
1008 db.names.back().first.insert(0, "::");
1011 } else if (last - t > 2 && t[0] == 's' && t[1] == 'r') {
1014 const char *t1 = parse_unresolved_type(t, last, db);
1015 if (t1 == t || t1 == last)
1018 t1 = parse_template_args(t, last, db);
1020 if (db.names.size() < 2)
1022 auto args = db.names.back().move_full();
1023 db.names.pop_back();
1024 db.names.back().first += std::move(args);
1027 db.names.pop_back();
1032 t1 = parse_unresolved_qualifier_level(t, last, db);
1033 if (t1 == t || t1 == last || db.names.size() < 2)
1035 auto s = db.names.back().move_full();
1036 db.names.pop_back();
1037 db.names.back().first += "::" + std::move(s);
1041 t1 = parse_base_unresolved_name(t, last, db);
1043 if (!db.names.empty())
1044 db.names.pop_back();
1047 if (db.names.size() < 2)
1049 auto s = db.names.back().move_full();
1050 db.names.pop_back();
1051 db.names.back().first += "::" + std::move(s);
1055 const char *t1 = parse_unresolved_type(t, last, db);
1058 t1 = parse_template_args(t, last, db);
1060 if (db.names.size() < 2)
1062 auto args = db.names.back().move_full();
1063 db.names.pop_back();
1064 db.names.back().first += std::move(args);
1067 t1 = parse_base_unresolved_name(t, last, db);
1069 if (!db.names.empty())
1070 db.names.pop_back();
1073 if (db.names.size() < 2)
1075 auto s = db.names.back().move_full();
1076 db.names.pop_back();
1077 db.names.back().first += "::" + std::move(s);
1080 t1 = parse_unresolved_qualifier_level(t, last, db);
1081 if (t1 == t || t1 == last)
1085 if (db.names.empty())
1087 db.names.back().first.insert(0, "::");
1090 t1 = parse_unresolved_qualifier_level(t, last, db);
1091 if (t1 == t || t1 == last || db.names.size() < 2)
1093 auto s = db.names.back().move_full();
1094 db.names.pop_back();
1095 db.names.back().first += "::" + std::move(s);
1099 t1 = parse_base_unresolved_name(t, last, db);
1101 if (!db.names.empty())
1102 db.names.pop_back();
1105 if (db.names.size() < 2)
1107 auto s = db.names.back().move_full();
1108 db.names.pop_back();
1109 db.names.back().first += "::" + std::move(s);
1118 // dt <expression> <unresolved-name> # expr.name
1121 static const char *parse_dot_expr(const char *first, const char *last, C &db) {
1122 if (last - first >= 3 && first[0] == 'd' && first[1] == 't') {
1123 const char *t = parse_expression(first + 2, last, db);
1124 if (t != first + 2) {
1125 const char *t1 = parse_unresolved_name(t, last, db);
1127 if (db.names.size() < 2)
1129 auto name = db.names.back().move_full();
1130 db.names.pop_back();
1131 if (db.names.empty())
1133 db.names.back().first += "." + name;
1141 // cl <expression>+ E # call
1144 static const char *parse_call_expr(const char *first, const char *last, C &db) {
1145 if (last - first >= 4 && first[0] == 'c' && first[1] == 'l') {
1146 const char *t = parse_expression(first + 2, last, db);
1147 if (t != first + 2) {
1150 if (db.names.empty())
1152 db.names.back().first += db.names.back().second;
1153 db.names.back().second = std::string();
1154 db.names.back().first.append("(");
1155 bool first_expr = true;
1157 const char *t1 = parse_expression(t, last, db);
1158 if (t1 == t || t1 == last)
1160 if (db.names.empty())
1162 auto tmp = db.names.back().move_full();
1163 db.names.pop_back();
1165 if (db.names.empty())
1168 db.names.back().first.append(", ");
1171 db.names.back().first.append(tmp);
1176 if (db.names.empty())
1178 db.names.back().first.append(")");
1185 // [gs] nw <expression>* _ <type> E # new (expr-list) type
1186 // [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type
1188 // [gs] na <expression>* _ <type> E # new[] (expr-list) type
1189 // [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type
1191 // <initializer> ::= pi <expression>* E # parenthesized
1195 static const char *parse_new_expr(const char *first, const char *last, C &db) {
1196 if (last - first >= 4) {
1197 const char *t = first;
1198 bool parsed_gs = false;
1199 if (t[0] == 'g' && t[1] == 's') {
1203 if (t[0] == 'n' && (t[1] == 'w' || t[1] == 'a')) {
1204 bool is_array = t[1] == 'a';
1208 bool has_expr_list = false;
1209 bool first_expr = true;
1211 const char *t1 = parse_expression(t, last, db);
1212 if (t1 == t || t1 == last)
1214 has_expr_list = true;
1216 if (db.names.empty())
1218 auto tmp = db.names.back().move_full();
1219 db.names.pop_back();
1221 if (db.names.empty())
1223 db.names.back().first.append(", ");
1224 db.names.back().first.append(tmp);
1231 const char *t1 = parse_type(t, last, db);
1232 if (t1 == t || t1 == last)
1235 bool has_init = false;
1236 if (last - t >= 3 && t[0] == 'p' && t[1] == 'i') {
1241 t1 = parse_expression(t, last, db);
1242 if (t1 == t || t1 == last)
1245 if (db.names.empty())
1247 auto tmp = db.names.back().move_full();
1248 db.names.pop_back();
1250 if (db.names.empty())
1252 db.names.back().first.append(", ");
1253 db.names.back().first.append(tmp);
1262 std::string init_list;
1264 if (db.names.empty())
1266 init_list = db.names.back().move_full();
1267 db.names.pop_back();
1269 if (db.names.empty())
1271 auto type = db.names.back().move_full();
1272 db.names.pop_back();
1273 std::string expr_list;
1274 if (has_expr_list) {
1275 if (db.names.empty())
1277 expr_list = db.names.back().move_full();
1278 db.names.pop_back();
1288 r += "(" + expr_list + ") ";
1291 r += " (" + init_list + ")";
1292 db.names.push_back(std::move(r));
1299 // cv <type> <expression> # conversion with one
1301 // cv <type> _ <expression>* E # conversion with a
1302 // different number of arguments
1305 static const char *parse_conversion_expr(const char *first, const char *last,
1307 if (last - first >= 3 && first[0] == 'c' && first[1] == 'v') {
1308 bool try_to_parse_template_args = db.try_to_parse_template_args;
1309 db.try_to_parse_template_args = false;
1310 const char *t = parse_type(first + 2, last, db);
1311 db.try_to_parse_template_args = try_to_parse_template_args;
1312 if (t != first + 2 && t != last) {
1314 const char *t1 = parse_expression(t, last, db);
1323 db.names.emplace_back();
1325 bool first_expr = true;
1327 const char *t1 = parse_expression(t, last, db);
1328 if (t1 == t || t1 == last)
1331 if (db.names.empty())
1333 auto tmp = db.names.back().move_full();
1334 db.names.pop_back();
1336 if (db.names.empty())
1338 db.names.back().first.append(", ");
1339 db.names.back().first.append(tmp);
1348 if (db.names.size() < 2)
1350 auto tmp = db.names.back().move_full();
1351 db.names.pop_back();
1352 db.names.back() = "(" + db.names.back().move_full() + ")(" + tmp + ")";
1359 // pt <expression> <expression> # expr->name
1362 static const char *parse_arrow_expr(const char *first, const char *last,
1364 if (last - first >= 3 && first[0] == 'p' && first[1] == 't') {
1365 const char *t = parse_expression(first + 2, last, db);
1366 if (t != first + 2) {
1367 const char *t1 = parse_expression(t, last, db);
1369 if (db.names.size() < 2)
1371 auto tmp = db.names.back().move_full();
1372 db.names.pop_back();
1373 db.names.back().first += "->";
1374 db.names.back().first += tmp;
1382 // <ref-qualifier> ::= R # & ref-qualifier
1383 // <ref-qualifier> ::= O # && ref-qualifier
1385 // <function-type> ::= F [Y] <bare-function-type> [<ref-qualifier>] E
1388 static const char *parse_function_type(const char *first, const char *last,
1390 if (first != last && *first == 'F') {
1391 const char *t = first + 1;
1398 const char *t1 = parse_type(t, last, db);
1401 std::string sig("(");
1405 if (!db.names.empty())
1406 db.names.pop_back();
1417 if (*t == 'R' && t + 1 != last && t[1] == 'E') {
1422 if (*t == 'O' && t + 1 != last && t[1] == 'E') {
1427 size_t k0 = db.names.size();
1428 t1 = parse_type(t, last, db);
1429 size_t k1 = db.names.size();
1430 if (t1 == t || t1 == last)
1432 for (size_t k = k0; k < k1; ++k) {
1435 sig += db.names[k].move_full();
1437 for (size_t k = k0; k < k1; ++k)
1438 db.names.pop_back();
1450 if (db.names.empty())
1452 db.names.back().first += " ";
1453 db.names.back().second.insert(0, sig);
1461 // <pointer-to-member-type> ::= M <class type> <member type>
1464 static const char *parse_pointer_to_member_type(const char *first,
1465 const char *last, C &db) {
1466 if (first != last && *first == 'M') {
1467 const char *t = parse_type(first + 1, last, db);
1468 if (t != first + 1) {
1469 const char *t2 = parse_type(t, last, db);
1471 if (db.names.size() < 2)
1473 auto func = std::move(db.names.back());
1474 db.names.pop_back();
1475 auto class_type = std::move(db.names.back());
1476 if (!func.second.empty() && func.second.front() == '(') {
1477 db.names.back().first =
1478 std::move(func.first) + "(" + class_type.move_full() + "::*";
1479 db.names.back().second = ")" + std::move(func.second);
1481 db.names.back().first =
1482 std::move(func.first) + " " + class_type.move_full() + "::*";
1483 db.names.back().second = std::move(func.second);
1492 // <array-type> ::= A <positive dimension number> _ <element type>
1493 // ::= A [<dimension expression>] _ <element type>
1496 static const char *parse_array_type(const char *first, const char *last,
1498 if (first != last && *first == 'A' && first + 1 != last) {
1499 if (first[1] == '_') {
1500 const char *t = parse_type(first + 2, last, db);
1501 if (t != first + 2) {
1502 if (db.names.empty())
1504 if (db.names.back().second.substr(0, 2) == " [")
1505 db.names.back().second.erase(0, 1);
1506 db.names.back().second.insert(0, " []");
1509 } else if ('1' <= first[1] && first[1] <= '9') {
1510 const char *t = parse_number(first + 1, last);
1511 if (t != last && *t == '_') {
1512 const char *t2 = parse_type(t + 1, last, db);
1514 if (db.names.empty())
1516 if (db.names.back().second.substr(0, 2) == " [")
1517 db.names.back().second.erase(0, 1);
1518 db.names.back().second.insert(0,
1519 " [" + std::string(first + 1, t) + "]");
1524 const char *t = parse_expression(first + 1, last, db);
1525 if (t != first + 1 && t != last && *t == '_') {
1526 const char *t2 = parse_type(++t, last, db);
1528 if (db.names.size() < 2)
1530 auto type = std::move(db.names.back());
1531 db.names.pop_back();
1532 auto expr = std::move(db.names.back());
1533 db.names.back().first = std::move(type.first);
1534 if (type.second.substr(0, 2) == " [")
1535 type.second.erase(0, 1);
1536 db.names.back().second =
1537 " [" + expr.move_full() + "]" + std::move(type.second);
1546 // <decltype> ::= Dt <expression> E # decltype of an id-expression or class
1547 // member access (C++0x)
1548 // ::= DT <expression> E # decltype of an expression (C++0x)
1551 static const char *parse_decltype(const char *first, const char *last, C &db) {
1552 if (last - first >= 4 && first[0] == 'D') {
1556 const char *t = parse_expression(first + 2, last, db);
1557 if (t != first + 2 && t != last && *t == 'E') {
1558 if (db.names.empty())
1560 db.names.back() = "decltype(" + db.names.back().move_full() + ")";
1570 // <vector-type> ::= Dv <positive dimension number> _
1571 // <extended element type>
1572 // ::= Dv [<dimension expression>] _ <element type>
1573 // <extended element type> ::= <element type>
1574 // ::= p # AltiVec vector pixel
1577 static const char *parse_vector_type(const char *first, const char *last,
1579 if (last - first > 3 && first[0] == 'D' && first[1] == 'v') {
1580 if ('1' <= first[2] && first[2] <= '9') {
1581 const char *t = parse_number(first + 2, last);
1582 if (t == last || *t != '_')
1584 const char *num = first + 2;
1585 size_t sz = static_cast<size_t>(t - num);
1588 const char *t1 = parse_type(t, last, db);
1590 if (db.names.empty())
1592 db.names.back().first += " vector[" + std::string(num, sz) + "]";
1597 db.names.push_back("pixel vector[" + std::string(num, sz) + "]");
1603 const char *t1 = first + 2;
1605 const char *t = parse_expression(t1, last, db);
1607 if (db.names.empty())
1609 num = db.names.back().move_full();
1610 db.names.pop_back();
1614 if (t1 != last && *t1 == '_' && ++t1 != last) {
1615 const char *t = parse_type(t1, last, db);
1617 if (db.names.empty())
1619 db.names.back().first += " vector[" + num + "]";
1628 // <type> ::= <builtin-type>
1629 // ::= <function-type>
1630 // ::= <class-enum-type>
1632 // ::= <pointer-to-member-type>
1633 // ::= <template-param>
1634 // ::= <template-template-param> <template-args>
1636 // ::= <substitution>
1637 // ::= <CV-qualifiers> <type>
1638 // ::= P <type> # pointer-to
1639 // ::= R <type> # reference-to
1640 // ::= O <type> # rvalue reference-to (C++0x)
1641 // ::= C <type> # complex pair (C 2000)
1642 // ::= G <type> # imaginary (C 2000)
1643 // ::= Dp <type> # pack expansion (C++0x)
1644 // ::= U <source-name> <type> # vendor extended type qualifier
1645 // extension := U <objc-name> <objc-type> # objc-type<identifier>
1646 // extension := <vector-type> # <vector-type> starts with Dv
1648 // <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 +
1649 // <number of digits in k1> + k1
1650 // <objc-type> := <source-name> # PU<11+>objcproto 11objc_object<source-name>
1651 // 11objc_object -> id<source-name>
1654 static const char *parse_type(const char *first, const char *last, C &db) {
1655 if (first != last) {
1661 const char *t = parse_cv_qualifiers(first, last, cv);
1663 bool is_function = *t == 'F';
1664 size_t k0 = db.names.size();
1665 const char *t1 = parse_type(t, last, db);
1666 size_t k1 = db.names.size();
1670 db.subs.emplace_back();
1671 for (size_t k = k0; k < k1; ++k) {
1673 auto &name = db.names[k].second;
1674 size_t p = name.size();
1676 if (name[p - 2] == '&' && name[p - 1] == '&')
1678 else if (name.back() == '&')
1681 if (cv & CV_const) {
1682 name.insert(p, " const");
1685 if (cv & CV_volatile) {
1686 name.insert(p, " volatile");
1689 if (cv & CV_restrict)
1690 name.insert(p, " restrict");
1693 db.names[k].first.append(" const");
1694 if (cv & CV_volatile)
1695 db.names[k].first.append(" volatile");
1696 if (cv & CV_restrict)
1697 db.names[k].first.append(" restrict");
1699 db.subs.back().push_back(db.names[k]);
1706 const char *t = parse_builtin_type(first, last, db);
1712 t = parse_array_type(first, last, db);
1714 if (db.names.empty())
1717 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1721 t = parse_type(first + 1, last, db);
1722 if (t != first + 1) {
1723 if (db.names.empty())
1725 db.names.back().first.append(" complex");
1727 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1731 t = parse_function_type(first, last, db);
1733 if (db.names.empty())
1736 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1740 t = parse_type(first + 1, last, db);
1741 if (t != first + 1) {
1742 if (db.names.empty())
1744 db.names.back().first.append(" imaginary");
1746 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1750 t = parse_pointer_to_member_type(first, last, db);
1752 if (db.names.empty())
1755 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1759 size_t k0 = db.names.size();
1760 t = parse_type(first + 1, last, db);
1761 size_t k1 = db.names.size();
1762 if (t != first + 1) {
1763 db.subs.emplace_back();
1764 for (size_t k = k0; k < k1; ++k) {
1765 if (db.names[k].second.substr(0, 2) == " [") {
1766 db.names[k].first += " (";
1767 db.names[k].second.insert(0, ")");
1768 } else if (!db.names[k].second.empty() &&
1769 db.names[k].second.front() == '(') {
1770 db.names[k].first += "(";
1771 db.names[k].second.insert(0, ")");
1773 db.names[k].first.append("&&");
1774 db.subs.back().push_back(db.names[k]);
1781 size_t k0 = db.names.size();
1782 t = parse_type(first + 1, last, db);
1783 size_t k1 = db.names.size();
1784 if (t != first + 1) {
1785 db.subs.emplace_back();
1786 for (size_t k = k0; k < k1; ++k) {
1787 if (db.names[k].second.substr(0, 2) == " [") {
1788 db.names[k].first += " (";
1789 db.names[k].second.insert(0, ")");
1790 } else if (!db.names[k].second.empty() &&
1791 db.names[k].second.front() == '(') {
1792 db.names[k].first += "(";
1793 db.names[k].second.insert(0, ")");
1795 if (first[1] != 'U' ||
1796 db.names[k].first.substr(0, 12) != "objc_object<") {
1797 db.names[k].first.append("*");
1799 db.names[k].first.replace(0, 11, "id");
1801 db.subs.back().push_back(db.names[k]);
1808 size_t k0 = db.names.size();
1809 t = parse_type(first + 1, last, db);
1810 size_t k1 = db.names.size();
1811 if (t != first + 1) {
1812 db.subs.emplace_back();
1813 for (size_t k = k0; k < k1; ++k) {
1814 if (db.names[k].second.substr(0, 2) == " [") {
1815 db.names[k].first += " (";
1816 db.names[k].second.insert(0, ")");
1817 } else if (!db.names[k].second.empty() &&
1818 db.names[k].second.front() == '(') {
1819 db.names[k].first += "(";
1820 db.names[k].second.insert(0, ")");
1822 db.names[k].first.append("&");
1823 db.subs.back().push_back(db.names[k]);
1830 size_t k0 = db.names.size();
1831 t = parse_template_param(first, last, db);
1832 size_t k1 = db.names.size();
1834 db.subs.emplace_back();
1835 for (size_t k = k0; k < k1; ++k)
1836 db.subs.back().push_back(db.names[k]);
1837 if (db.try_to_parse_template_args && k1 == k0 + 1) {
1838 const char *t1 = parse_template_args(t, last, db);
1840 auto args = db.names.back().move_full();
1841 db.names.pop_back();
1842 db.names.back().first += std::move(args);
1843 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1852 if (first + 1 != last) {
1853 t = parse_source_name(first + 1, last, db);
1854 if (t != first + 1) {
1855 const char *t2 = parse_type(t, last, db);
1857 if (db.names.size() < 2)
1859 auto type = db.names.back().move_full();
1860 db.names.pop_back();
1861 if (db.names.back().first.substr(0, 9) != "objcproto") {
1862 db.names.back() = type + " " + db.names.back().move_full();
1864 auto proto = db.names.back().move_full();
1865 db.names.pop_back();
1866 t = parse_source_name(proto.data() + 9,
1867 proto.data() + proto.size(), db);
1868 if (t != proto.data() + 9) {
1870 type + "<" + db.names.back().move_full() + ">";
1872 db.names.push_back(type + " " + proto);
1875 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1882 if (first + 1 != last && first[1] == 't') {
1883 t = parse_name(first, last, db);
1885 if (db.names.empty())
1887 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1891 t = parse_substitution(first, last, db);
1894 // Parsed a substitution. If the substitution is a
1895 // <template-param> it might be followed by <template-args>.
1896 t = parse_template_args(first, last, db);
1898 if (db.names.size() < 2)
1900 auto template_args = db.names.back().move_full();
1901 db.names.pop_back();
1902 db.names.back().first += template_args;
1903 // Need to create substitution for <template-template-param>
1905 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1912 if (first + 1 != last) {
1915 size_t k0 = db.names.size();
1916 t = parse_type(first + 2, last, db);
1917 size_t k1 = db.names.size();
1918 if (t != first + 2) {
1919 db.subs.emplace_back();
1920 for (size_t k = k0; k < k1; ++k)
1921 db.subs.back().push_back(db.names[k]);
1929 t = parse_decltype(first, last, db);
1931 if (db.names.empty())
1933 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1939 t = parse_vector_type(first, last, db);
1941 if (db.names.empty())
1943 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1952 // must check for builtin-types before class-enum-types to avoid
1953 // ambiguities with operator-names
1954 t = parse_builtin_type(first, last, db);
1958 t = parse_name(first, last, db);
1960 if (db.names.empty())
1962 db.subs.push_back(typename C::sub_type(1, db.names.back()));
1978 // ::= ad # & (unary)
1985 // ::= cv <type> # (cast)
1986 // ::= da # delete[]
1987 // ::= de # * (unary)
1998 // ::= li <source-name> # operator ""
2006 // ::= mm # -- (postfix in <expression> context)
2009 // ::= ng # - (unary)
2018 // ::= pp # ++ (postfix in <expression> context)
2019 // ::= ps # + (unary)
2026 // ::= v <digit> <source-name> # vendor extended
2030 static const char *parse_operator_name(const char *first, const char *last,
2032 if (last - first >= 2) {
2037 db.names.push_back("operator&&");
2042 db.names.push_back("operator&");
2046 db.names.push_back("operator&=");
2050 db.names.push_back("operator=");
2058 db.names.push_back("operator()");
2062 db.names.push_back("operator,");
2066 db.names.push_back("operator~");
2070 bool try_to_parse_template_args = db.try_to_parse_template_args;
2071 db.try_to_parse_template_args = false;
2072 const char *t = parse_type(first + 2, last, db);
2073 db.try_to_parse_template_args = try_to_parse_template_args;
2074 if (t != first + 2) {
2075 if (db.names.empty())
2077 db.names.back().first.insert(0, "operator ");
2078 db.parsed_ctor_dtor_cv = true;
2087 db.names.push_back("operator delete[]");
2091 db.names.push_back("operator*");
2095 db.names.push_back("operator delete");
2099 db.names.push_back("operator/");
2103 db.names.push_back("operator/=");
2111 db.names.push_back("operator^");
2115 db.names.push_back("operator^=");
2119 db.names.push_back("operator==");
2127 db.names.push_back("operator>=");
2131 db.names.push_back("operator>");
2137 if (first[1] == 'x') {
2138 db.names.push_back("operator[]");
2145 db.names.push_back("operator<=");
2149 const char *t = parse_source_name(first + 2, last, db);
2150 if (t != first + 2) {
2151 if (db.names.empty())
2153 db.names.back().first.insert(0, "operator\"\" ");
2158 db.names.push_back("operator<<");
2162 db.names.push_back("operator<<=");
2166 db.names.push_back("operator<");
2174 db.names.push_back("operator-");
2178 db.names.push_back("operator-=");
2182 db.names.push_back("operator*");
2186 db.names.push_back("operator*=");
2190 db.names.push_back("operator--");
2198 db.names.push_back("operator new[]");
2202 db.names.push_back("operator!=");
2206 db.names.push_back("operator-");
2210 db.names.push_back("operator!");
2214 db.names.push_back("operator new");
2222 db.names.push_back("operator||");
2226 db.names.push_back("operator|");
2230 db.names.push_back("operator|=");
2238 db.names.push_back("operator->*");
2242 db.names.push_back("operator+");
2246 db.names.push_back("operator+=");
2250 db.names.push_back("operator++");
2254 db.names.push_back("operator+");
2258 db.names.push_back("operator->");
2264 if (first[1] == 'u') {
2265 db.names.push_back("operator?");
2272 db.names.push_back("operator%");
2276 db.names.push_back("operator%=");
2280 db.names.push_back("operator>>");
2284 db.names.push_back("operator>>=");
2290 if (std::isdigit(first[1])) {
2291 const char *t = parse_source_name(first + 2, last, db);
2292 if (t != first + 2) {
2293 if (db.names.empty())
2295 db.names.back().first.insert(0, "operator ");
2306 static const char *parse_integer_literal(const char *first, const char *last,
2307 const std::string &lit, C &db) {
2308 const char *t = parse_number(first, last);
2309 if (t != first && t != last && *t == 'E') {
2311 db.names.push_back("(" + lit + ")");
2313 db.names.emplace_back();
2314 if (*first == 'n') {
2315 db.names.back().first += '-';
2318 db.names.back().first.append(first, t);
2319 if (lit.size() <= 3)
2320 db.names.back().first += lit;
2326 // <expr-primary> ::= L <type> <value number> E #
2328 // ::= L <type> <value float> E #
2330 // ::= L <string type> E #
2332 // ::= L <nullptr type> E #
2333 // nullptr literal (i.e., "LDnE")
2334 // ::= L <type> <real-part float> _ <imag-part float> E #
2335 // complex floating point literal (C 2000)
2336 // ::= L <mangled-name> E #
2340 static const char *parse_expr_primary(const char *first, const char *last,
2342 if (last - first >= 4 && *first == 'L') {
2345 const char *t = parse_integer_literal(first + 2, last, "wchar_t", db);
2350 if (first[3] == 'E') {
2353 db.names.push_back("false");
2357 db.names.push_back("true");
2364 const char *t = parse_integer_literal(first + 2, last, "char", db);
2369 const char *t = parse_integer_literal(first + 2, last, "signed char", db);
2375 parse_integer_literal(first + 2, last, "unsigned char", db);
2380 const char *t = parse_integer_literal(first + 2, last, "short", db);
2386 parse_integer_literal(first + 2, last, "unsigned short", db);
2391 const char *t = parse_integer_literal(first + 2, last, "", db);
2396 const char *t = parse_integer_literal(first + 2, last, "u", db);
2401 const char *t = parse_integer_literal(first + 2, last, "l", db);
2406 const char *t = parse_integer_literal(first + 2, last, "ul", db);
2411 const char *t = parse_integer_literal(first + 2, last, "ll", db);
2416 const char *t = parse_integer_literal(first + 2, last, "ull", db);
2421 const char *t = parse_integer_literal(first + 2, last, "__int128", db);
2427 parse_integer_literal(first + 2, last, "unsigned __int128", db);
2432 const char *t = parse_floating_number<float>(first + 2, last, db);
2437 const char *t = parse_floating_number<double>(first + 2, last, db);
2442 const char *t = parse_floating_number<long double>(first + 2, last, db);
2447 if (first[2] == 'Z') {
2448 const char *t = parse_encoding(first + 3, last, db);
2449 if (t != first + 3 && t != last && *t == 'E')
2454 // Invalid mangled name per
2455 // http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html
2458 // might be named type
2459 const char *t = parse_type(first + 1, last, db);
2460 if (t != first + 1 && t != last) {
2463 for (; n != last && isdigit(*n); ++n)
2465 if (n != t && n != last && *n == 'E') {
2466 if (db.names.empty())
2469 "(" + db.names.back().move_full() + ")" + std::string(t, n);
2484 static std::string base_name(std::string &s) {
2487 if (s == "std::string") {
2488 s = "std::basic_string<char, std::char_traits<char>, std::allocator<char> "
2490 return "basic_string";
2492 if (s == "std::istream") {
2493 s = "std::basic_istream<char, std::char_traits<char> >";
2494 return "basic_istream";
2496 if (s == "std::ostream") {
2497 s = "std::basic_ostream<char, std::char_traits<char> >";
2498 return "basic_ostream";
2500 if (s == "std::iostream") {
2501 s = "std::basic_iostream<char, std::char_traits<char> >";
2502 return "basic_iostream";
2504 const char *const pf = s.data();
2505 const char *pe = pf + s.size();
2506 if (pe[-1] == '>') {
2510 return std::string();
2511 if (pe[-1] == '<') {
2516 } else if (pe[-1] == '>')
2521 return std::string();
2522 const char *p0 = pe - 1;
2523 for (; p0 != pf; --p0) {
2529 return std::string(p0, pe);
2532 // <ctor-dtor-name> ::= C1 # complete object constructor
2533 // ::= C2 # base object constructor
2534 // ::= C3 # complete object allocating constructor
2535 // extension ::= C5 # ?
2536 // ::= D0 # deleting destructor
2537 // ::= D1 # complete object destructor
2538 // ::= D2 # base object destructor
2539 // extension ::= D5 # ?
2542 static const char *parse_ctor_dtor_name(const char *first, const char *last,
2544 if (last - first >= 2 && !db.names.empty()) {
2552 if (db.names.empty())
2554 db.names.push_back(base_name(db.names.back().first));
2556 db.parsed_ctor_dtor_cv = true;
2566 if (db.names.empty())
2568 db.names.push_back("~" + base_name(db.names.back().first));
2570 db.parsed_ctor_dtor_cv = true;
2579 // <unnamed-type-name> ::= Ut [ <nonnegative number> ] _
2580 // ::= <closure-type-name>
2582 // <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
2584 // <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda
2585 // has no parameters
2588 static const char *parse_unnamed_type_name(const char *first, const char *last,
2590 if (last - first > 2 && first[0] == 'U') {
2591 char type = first[1];
2594 db.names.push_back(std::string("'unnamed"));
2595 const char *t0 = first + 2;
2597 db.names.pop_back();
2600 if (std::isdigit(*t0)) {
2601 const char *t1 = t0 + 1;
2602 while (t1 != last && std::isdigit(*t1))
2604 db.names.back().first.append(t0, t1);
2607 db.names.back().first.push_back('\'');
2608 if (t0 == last || *t0 != '_') {
2609 db.names.pop_back();
2615 db.names.push_back(std::string("'lambda'("));
2616 const char *t0 = first + 2;
2617 if (first[2] == 'v') {
2618 db.names.back().first += ')';
2621 const char *t1 = parse_type(t0, last, db);
2623 if (!db.names.empty())
2624 db.names.pop_back();
2627 if (db.names.size() < 2)
2629 auto tmp = db.names.back().move_full();
2630 db.names.pop_back();
2631 db.names.back().first.append(tmp);
2634 t1 = parse_type(t0, last, db);
2637 if (db.names.size() < 2)
2639 tmp = db.names.back().move_full();
2640 db.names.pop_back();
2642 db.names.back().first.append(", ");
2643 db.names.back().first.append(tmp);
2647 if (db.names.empty())
2649 db.names.back().first.append(")");
2651 if (t0 == last || *t0 != 'E') {
2652 if (!db.names.empty())
2653 db.names.pop_back();
2658 if (!db.names.empty())
2659 db.names.pop_back();
2662 if (std::isdigit(*t0)) {
2663 const char *t1 = t0 + 1;
2664 while (t1 != last && std::isdigit(*t1))
2666 db.names.back().first.insert(db.names.back().first.begin() + 7, t0, t1);
2669 if (t0 == last || *t0 != '_') {
2670 if (!db.names.empty())
2671 db.names.pop_back();
2681 // <unqualified-name> ::= <operator-name>
2682 // ::= <ctor-dtor-name>
2683 // ::= <source-name>
2684 // ::= <unnamed-type-name>
2687 static const char *parse_unqualified_name(const char *first, const char *last,
2689 if (first != last) {
2694 t = parse_ctor_dtor_name(first, last, db);
2699 t = parse_unnamed_type_name(first, last, db);
2712 t = parse_source_name(first, last, db);
2717 t = parse_operator_name(first, last, db);
2726 // <unscoped-name> ::= <unqualified-name>
2727 // ::= St <unqualified-name> # ::std::
2728 // extension ::= StL<unqualified-name>
2731 static const char *parse_unscoped_name(const char *first, const char *last,
2733 if (last - first >= 2) {
2734 const char *t0 = first;
2736 if (first[0] == 'S' && first[1] == 't') {
2739 if (t0 != last && *t0 == 'L')
2742 const char *t1 = parse_unqualified_name(t0, last, db);
2745 if (db.names.empty())
2747 db.names.back().first.insert(0, "std::");
2755 // at <type> # alignof (a type)
2758 static const char *parse_alignof_type(const char *first, const char *last,
2760 if (last - first >= 3 && first[0] == 'a' && first[1] == 't') {
2761 const char *t = parse_type(first + 2, last, db);
2762 if (t != first + 2) {
2763 if (db.names.empty())
2765 db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
2772 // az <expression> # alignof (a
2776 static const char *parse_alignof_expr(const char *first, const char *last,
2778 if (last - first >= 3 && first[0] == 'a' && first[1] == 'z') {
2779 const char *t = parse_expression(first + 2, last, db);
2780 if (t != first + 2) {
2781 if (db.names.empty())
2783 db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
2791 static const char *parse_noexcept_expression(const char *first,
2792 const char *last, C &db) {
2793 const char *t1 = parse_expression(first, last, db);
2795 if (db.names.empty())
2797 db.names.back().first = "noexcept (" + db.names.back().move_full() + ")";
2804 static const char *parse_prefix_expression(const char *first, const char *last,
2805 const std::string &op,
2807 const char *t1 = parse_expression(first, last, db);
2809 if (db.names.empty())
2811 db.names.back().first = op + "(" + db.names.back().move_full() + ")";
2818 static const char *parse_binary_expression(const char *first, const char *last,
2819 const std::string &op,
2821 const char *t1 = parse_expression(first, last, db);
2823 const char *t2 = parse_expression(t1, last, db);
2825 if (db.names.size() < 2)
2827 auto op2 = db.names.back().move_full();
2828 db.names.pop_back();
2829 auto op1 = db.names.back().move_full();
2830 auto &nm = db.names.back().first;
2834 nm += "(" + op1 + ") " + op + " (" + op2 + ")";
2838 } else if (!db.names.empty())
2839 db.names.pop_back();
2844 // <expression> ::= <unary operator-name> <expression>
2845 // ::= <binary operator-name> <expression> <expression>
2846 // ::= <ternary operator-name> <expression> <expression>
2848 // ::= cl <expression>+ E # call
2849 // ::= cv <type> <expression> #
2850 // conversion with one argument
2851 // ::= cv <type> _ <expression>* E #
2852 // conversion with a different number of arguments
2853 // ::= [gs] nw <expression>* _ <type> E # new
2855 // ::= [gs] nw <expression>* _ <type> <initializer> # new
2856 // (expr-list) type (init)
2857 // ::= [gs] na <expression>* _ <type> E # new[]
2859 // ::= [gs] na <expression>* _ <type> <initializer> # new[]
2860 // (expr-list) type (init)
2861 // ::= [gs] dl <expression> #
2862 // delete expression
2863 // ::= [gs] da <expression> #
2864 // delete[] expression
2865 // ::= pp_ <expression> #
2867 // ::= mm_ <expression> #
2871 // ::= te <expression> #
2872 // typeid (expression)
2873 // ::= dc <type> <expression> #
2874 // dynamic_cast<type> (expression)
2875 // ::= sc <type> <expression> #
2876 // static_cast<type> (expression)
2877 // ::= cc <type> <expression> #
2878 // const_cast<type> (expression)
2879 // ::= rc <type> <expression> #
2880 // reinterpret_cast<type> (expression)
2883 // ::= sz <expression> #
2884 // sizeof (an expression)
2887 // ::= az <expression> #
2888 // alignof (an expression)
2889 // ::= nx <expression> #
2890 // noexcept (expression)
2891 // ::= <template-param>
2892 // ::= <function-param>
2893 // ::= dt <expression> <unresolved-name> #
2895 // ::= pt <expression> <unresolved-name> #
2897 // ::= ds <expression> <expression> #
2899 // ::= sZ <template-param> # size
2900 // of a parameter pack
2901 // ::= sZ <function-param> # size
2902 // of a function parameter pack
2903 // ::= sp <expression> # pack
2905 // ::= tw <expression> # throw
2908 // with no operand (rethrow)
2909 // ::= <unresolved-name> # f(p),
2922 // ::= <expr-primary>
2925 static const char *parse_expression(const char *first, const char *last,
2927 if (last - first >= 2) {
2928 const char *t = first;
2929 bool parsed_gs = false;
2930 if (last - first >= 4 && t[0] == 'g' && t[1] == 's') {
2936 first = parse_expr_primary(first, last, db);
2939 first = parse_template_param(first, last, db);
2942 first = parse_function_param(first, last, db);
2947 t = parse_binary_expression(first + 2, last, "&&", db);
2952 t = parse_prefix_expression(first + 2, last, "&", db);
2957 t = parse_binary_expression(first + 2, last, "&", db);
2962 t = parse_binary_expression(first + 2, last, "&=", db);
2967 t = parse_binary_expression(first + 2, last, "=", db);
2972 first = parse_alignof_type(first, last, db);
2975 first = parse_alignof_expr(first, last, db);
2982 first = parse_const_cast_expr(first, last, db);
2985 first = parse_call_expr(first, last, db);
2988 t = parse_binary_expression(first + 2, last, ",", db);
2993 t = parse_prefix_expression(first + 2, last, "~", db);
2998 first = parse_conversion_expr(first, last, db);
3005 const char *t1 = parse_expression(t + 2, last, db);
3007 if (db.names.empty())
3009 db.names.back().first =
3010 (parsed_gs ? std::string("::") : std::string()) + "delete[] " +
3011 db.names.back().move_full();
3016 first = parse_dynamic_cast_expr(first, last, db);
3019 t = parse_prefix_expression(first + 2, last, "*", db);
3024 const char *t1 = parse_expression(t + 2, last, db);
3026 if (db.names.empty())
3028 db.names.back().first =
3029 (parsed_gs ? std::string("::") : std::string()) + "delete " +
3030 db.names.back().move_full();
3035 return parse_unresolved_name(first, last, db);
3037 first = parse_dot_star_expr(first, last, db);
3040 first = parse_dot_expr(first, last, db);
3043 t = parse_binary_expression(first + 2, last, "/", db);
3048 t = parse_binary_expression(first + 2, last, "/=", db);
3057 t = parse_binary_expression(first + 2, last, "^", db);
3062 t = parse_binary_expression(first + 2, last, "^=", db);
3067 t = parse_binary_expression(first + 2, last, "==", db);
3076 t = parse_binary_expression(first + 2, last, ">=", db);
3081 t = parse_binary_expression(first + 2, last, ">", db);
3089 const char *t1 = parse_expression(first + 2, last, db);
3090 if (t1 != first + 2) {
3091 const char *t2 = parse_expression(t1, last, db);
3093 if (db.names.size() < 2)
3095 auto op2 = db.names.back().move_full();
3096 db.names.pop_back();
3097 auto op1 = db.names.back().move_full();
3098 db.names.back() = "(" + op1 + ")[" + op2 + "]";
3100 } else if (!db.names.empty())
3101 db.names.pop_back();
3108 t = parse_binary_expression(first + 2, last, "<=", db);
3113 t = parse_binary_expression(first + 2, last, "<<", db);
3118 t = parse_binary_expression(first + 2, last, "<<=", db);
3123 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 t = parse_binary_expression(first + 2, last, "*", db);
3147 t = parse_binary_expression(first + 2, last, "*=", db);
3152 if (first + 2 != last && first[2] == '_') {
3153 t = parse_prefix_expression(first + 3, last, "--", db);
3157 const char *t1 = parse_expression(first + 2, last, db);
3158 if (t1 != first + 2) {
3159 if (db.names.empty())
3161 db.names.back() = "(" + db.names.back().move_full() + ")--";
3172 first = parse_new_expr(first, last, db);
3175 t = parse_binary_expression(first + 2, last, "!=", db);
3180 t = parse_prefix_expression(first + 2, last, "-", db);
3185 t = parse_prefix_expression(first + 2, last, "!", db);
3190 t = parse_noexcept_expression(first + 2, last, db);
3199 return parse_unresolved_name(first, last, db);
3201 t = parse_binary_expression(first + 2, last, "||", db);
3206 t = parse_binary_expression(first + 2, last, "|", db);
3211 t = parse_binary_expression(first + 2, last, "|=", db);
3220 t = parse_binary_expression(first + 2, last, "->*", db);
3225 t = parse_binary_expression(first + 2, last, "+", db);
3230 t = parse_binary_expression(first + 2, last, "+=", db);
3235 if (first + 2 != last && first[2] == '_') {
3236 t = parse_prefix_expression(first + 3, last, "++", db);
3240 const char *t1 = parse_expression(first + 2, last, db);
3241 if (t1 != first + 2) {
3242 if (db.names.empty())
3244 db.names.back() = "(" + db.names.back().move_full() + ")++";
3250 t = parse_prefix_expression(first + 2, last, "+", db);
3255 first = parse_arrow_expr(first, last, db);
3261 const char *t1 = parse_expression(first + 2, last, db);
3262 if (t1 != first + 2) {
3263 const char *t2 = parse_expression(t1, last, db);
3265 const char *t3 = parse_expression(t2, last, db);
3267 if (db.names.size() < 3)
3269 auto op3 = db.names.back().move_full();
3270 db.names.pop_back();
3271 auto op2 = db.names.back().move_full();
3272 db.names.pop_back();
3273 auto op1 = db.names.back().move_full();
3274 db.names.back() = "(" + op1 + ") ? (" + op2 + ") : (" + op3 + ")";
3277 if (db.names.size() < 2)
3279 db.names.pop_back();
3280 db.names.pop_back();
3282 } else if (!db.names.empty())
3283 db.names.pop_back();
3290 first = parse_reinterpret_cast_expr(first, last, db);
3293 t = parse_binary_expression(first + 2, last, "%", db);
3298 t = parse_binary_expression(first + 2, last, "%=", db);
3303 t = parse_binary_expression(first + 2, last, ">>", db);
3308 t = parse_binary_expression(first + 2, last, ">>=", db);
3317 first = parse_static_cast_expr(first, last, db);
3320 first = parse_pack_expansion(first, last, db);
3323 return parse_unresolved_name(first, last, db);
3325 first = parse_sizeof_type_expr(first, last, db);
3328 first = parse_sizeof_expr_expr(first, last, db);
3331 if (last - t >= 3) {
3334 first = parse_sizeof_param_pack_expr(first, last, db);
3337 first = parse_sizeof_function_param_pack_expr(first, last, db);
3348 first = parse_typeid_expr(first, last, db);
3351 db.names.push_back("throw");
3355 first = parse_throw_expr(first, last, db);
3368 return parse_unresolved_name(first, last, db);
3374 // <template-arg> ::= <type> # type
3376 // ::= X <expression> E #
3378 // ::= <expr-primary> #
3379 // simple expressions
3380 // ::= J <template-arg>* E #
3382 // ::= LZ <encoding> E #
3386 static const char *parse_template_arg(const char *first, const char *last,
3388 if (first != last) {
3392 t = parse_expression(first + 1, last, db);
3393 if (t != first + 1) {
3394 if (t != last && *t == 'E')
3403 const char *t1 = parse_template_arg(t, last, db);
3411 // <expr-primary> or LZ <encoding> E
3412 if (first + 1 != last && first[1] == 'Z') {
3413 t = parse_encoding(first + 2, last, db);
3414 if (t != first + 2 && t != last && *t == 'E')
3417 first = parse_expr_primary(first, last, db);
3421 first = parse_type(first, last, db);
3428 // <template-args> ::= I <template-arg>* E
3429 // extension, the abi says <template-arg>+
3432 static const char *parse_template_args(const char *first, const char *last,
3434 if (last - first >= 2 && *first == 'I') {
3435 if (db.tag_templates)
3436 db.template_param.back().clear();
3437 const char *t = first + 1;
3438 std::string args("<");
3440 if (db.tag_templates)
3441 db.template_param.emplace_back();
3442 size_t k0 = db.names.size();
3443 const char *t1 = parse_template_arg(t, last, db);
3444 size_t k1 = db.names.size();
3445 if (db.tag_templates)
3446 db.template_param.pop_back();
3447 if (t1 == t || t1 == last)
3449 if (db.tag_templates) {
3450 db.template_param.back().emplace_back();
3451 for (size_t k = k0; k < k1; ++k)
3452 db.template_param.back().back().push_back(db.names[k]);
3454 for (size_t k = k0; k < k1; ++k) {
3455 if (args.size() > 1)
3457 args += db.names[k].move_full();
3459 for (; k1 > k0; --k1)
3460 if (!db.names.empty())
3461 db.names.pop_back();
3465 if (args.back() != '>')
3469 db.names.push_back(std::move(args));
3474 // <nested-name> ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix>
3475 // <unqualified-name> E
3476 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
3477 // <template-args> E
3479 // <prefix> ::= <prefix> <unqualified-name>
3480 // ::= <template-prefix> <template-args>
3481 // ::= <template-param>
3484 // ::= <substitution>
3485 // ::= <prefix> <data-member-prefix>
3488 // <template-prefix> ::= <prefix> <template unqualified-name>
3489 // ::= <template-param>
3490 // ::= <substitution>
3493 static const char *parse_nested_name(const char *first, const char *last, C &db,
3494 bool *ends_with_template_args) {
3495 if (first != last && *first == 'N') {
3497 const char *t0 = parse_cv_qualifiers(first + 1, last, cv);
3504 } else if (*t0 == 'O') {
3508 db.names.emplace_back();
3509 if (last - t0 >= 2 && t0[0] == 'S' && t0[1] == 't') {
3511 db.names.back().first = "std";
3514 db.names.pop_back();
3517 bool pop_subs = false;
3518 bool component_ends_with_template_args = false;
3519 while (*t0 != 'E') {
3520 component_ends_with_template_args = false;
3524 if (t0 + 1 != last && t0[1] == 't')
3525 goto do_parse_unqualified_name;
3526 t1 = parse_substitution(t0, last, db);
3527 if (t1 != t0 && t1 != last) {
3528 auto name = db.names.back().move_full();
3529 db.names.pop_back();
3530 if (db.names.empty())
3532 if (!db.names.back().first.empty()) {
3533 db.names.back().first += "::" + name;
3534 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3536 db.names.back().first = name;
3543 t1 = parse_template_param(t0, last, db);
3544 if (t1 != t0 && t1 != last) {
3545 auto name = db.names.back().move_full();
3546 db.names.pop_back();
3547 if (db.names.empty())
3549 if (!db.names.back().first.empty())
3550 db.names.back().first += "::" + name;
3552 db.names.back().first = name;
3553 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3560 if (t0 + 1 != last && t0[1] != 't' && t0[1] != 'T')
3561 goto do_parse_unqualified_name;
3562 t1 = parse_decltype(t0, last, db);
3563 if (t1 != t0 && t1 != last) {
3564 auto name = db.names.back().move_full();
3565 db.names.pop_back();
3566 if (db.names.empty())
3568 if (!db.names.back().first.empty())
3569 db.names.back().first += "::" + name;
3571 db.names.back().first = name;
3572 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3579 t1 = parse_template_args(t0, last, db);
3580 if (t1 != t0 && t1 != last) {
3581 auto name = db.names.back().move_full();
3582 db.names.pop_back();
3583 if (db.names.empty())
3585 db.names.back().first += name;
3586 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3588 component_ends_with_template_args = true;
3597 do_parse_unqualified_name:
3598 t1 = parse_unqualified_name(t0, last, db);
3599 if (t1 != t0 && t1 != last) {
3600 auto name = db.names.back().move_full();
3601 db.names.pop_back();
3602 if (db.names.empty())
3604 if (!db.names.back().first.empty())
3605 db.names.back().first += "::" + name;
3607 db.names.back().first = name;
3608 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3617 if (pop_subs && !db.subs.empty())
3619 if (ends_with_template_args)
3620 *ends_with_template_args = component_ends_with_template_args;
3625 // <discriminator> := _ <non-negative number> # when number < 10
3626 // := __ <non-negative number> _ # when number >= 10
3627 // extension := decimal-digit+ # at the end of string
3629 static const char *parse_discriminator(const char *first, const char *last) {
3630 // parse but ignore discriminator
3631 if (first != last) {
3632 if (*first == '_') {
3633 const char *t1 = first + 1;
3635 if (std::isdigit(*t1))
3637 else if (*t1 == '_') {
3638 for (++t1; t1 != last && std::isdigit(*t1); ++t1)
3640 if (t1 != last && *t1 == '_')
3644 } else if (std::isdigit(*first)) {
3645 const char *t1 = first + 1;
3646 for (; t1 != last && std::isdigit(*t1); ++t1)
3655 // <local-name> := Z <function encoding> E <entity name> [<discriminator>]
3656 // := Z <function encoding> E s [<discriminator>]
3657 // := Z <function encoding> Ed [ <parameter number> ] _ <entity
3661 static const char *parse_local_name(const char *first, const char *last, C &db,
3662 bool *ends_with_template_args) {
3663 if (first != last && *first == 'Z') {
3664 const char *t = parse_encoding(first + 1, last, db);
3665 if (t != first + 1 && t != last && *t == 'E' && ++t != last) {
3668 first = parse_discriminator(t + 1, last);
3669 if (db.names.empty())
3671 db.names.back().first.append("::string literal");
3675 const char *t1 = parse_number(t, last);
3676 if (t1 != last && *t1 == '_') {
3678 t1 = parse_name(t, last, db, ends_with_template_args);
3680 if (db.names.size() < 2)
3682 auto name = db.names.back().move_full();
3683 db.names.pop_back();
3684 if (db.names.empty())
3686 db.names.back().first.append("::");
3687 db.names.back().first.append(name);
3689 } else if (!db.names.empty())
3690 db.names.pop_back();
3695 const char *t1 = parse_name(t, last, db, ends_with_template_args);
3697 // parse but ignore discriminator
3698 first = parse_discriminator(t1, last);
3699 if (db.names.size() < 2)
3701 auto name = db.names.back().move_full();
3702 db.names.pop_back();
3703 if (db.names.empty())
3705 db.names.back().first.append("::");
3706 db.names.back().first.append(name);
3707 } else if (!db.names.empty())
3708 db.names.pop_back();
3716 // <name> ::= <nested-name> // N
3717 // ::= <local-name> # See Scope Encoding below // Z
3718 // ::= <unscoped-template-name> <template-args>
3719 // ::= <unscoped-name>
3721 // <unscoped-template-name> ::= <unscoped-name>
3722 // ::= <substitution>
3725 static const char *parse_name(const char *first, const char *last, C &db,
3726 bool *ends_with_template_args) {
3727 if (last - first >= 2) {
3728 const char *t0 = first;
3729 // extension: ignore L here
3734 const char *t1 = parse_nested_name(t0, last, db, ends_with_template_args);
3740 const char *t1 = parse_local_name(t0, last, db, ends_with_template_args);
3746 const char *t1 = parse_unscoped_name(t0, last, db);
3749 *t1 == 'I') // <unscoped-template-name> <template-args>
3751 if (db.names.empty())
3753 db.subs.push_back(typename C::sub_type(1, db.names.back()));
3755 t1 = parse_template_args(t0, last, db);
3757 if (db.names.size() < 2)
3759 auto tmp = db.names.back().move_full();
3760 db.names.pop_back();
3761 if (db.names.empty())
3763 db.names.back().first += tmp;
3765 if (ends_with_template_args)
3766 *ends_with_template_args = true;
3768 } else // <unscoped-name>
3770 } else { // try <substitution> <template-args>
3771 t1 = parse_substitution(t0, last, db);
3772 if (t1 != t0 && t1 != last && *t1 == 'I') {
3774 t1 = parse_template_args(t0, last, db);
3776 if (db.names.size() < 2)
3778 auto tmp = db.names.back().move_full();
3779 db.names.pop_back();
3780 if (db.names.empty())
3782 db.names.back().first += tmp;
3784 if (ends_with_template_args)
3785 *ends_with_template_args = true;
3796 // <call-offset> ::= h <nv-offset> _
3797 // ::= v <v-offset> _
3799 // <nv-offset> ::= <offset number>
3800 // # non-virtual base override
3802 // <v-offset> ::= <offset number> _ <virtual offset number>
3803 // # virtual base override, with vcall offset
3805 static const char *parse_call_offset(const char *first, const char *last) {
3806 if (first != last) {
3809 const char *t = parse_number(first + 1, last);
3810 if (t != first + 1 && t != last && *t == '_')
3814 const char *t = parse_number(first + 1, last);
3815 if (t != first + 1 && t != last && *t == '_') {
3816 const char *t2 = parse_number(++t, last);
3817 if (t2 != t && t2 != last && *t2 == '_')
3826 // <special-name> ::= TV <type> # virtual table
3827 // ::= TT <type> # VTT structure (construction vtable index)
3828 // ::= TI <type> # typeinfo structure
3829 // ::= TS <type> # typeinfo name (null-terminated byte string)
3830 // ::= Tc <call-offset> <call-offset> <base encoding>
3831 // # base is the nominal target function of thunk
3832 // # first call-offset is 'this' adjustment
3833 // # second call-offset is result adjustment
3834 // ::= T <call-offset> <base encoding>
3835 // # base is the nominal target function of thunk
3836 // ::= GV <object name> # Guard variable for one-time
3839 // ::= TW <object name> # Thread-local wrapper
3840 // ::= TH <object name> # Thread-local initialization
3841 // extension ::= TC <first type> <number> _ <second type> # construction
3842 // vtable for second-in-first
3843 // extension ::= GR <object name> # reference temporary for object
3846 static const char *parse_special_name(const char *first, const char *last,
3848 if (last - first > 2) {
3854 // TV <type> # virtual table
3855 t = parse_type(first + 2, last, db);
3856 if (t != first + 2) {
3857 if (db.names.empty())
3859 db.names.back().first.insert(0, "vtable for ");
3864 // TT <type> # VTT structure (construction vtable index)
3865 t = parse_type(first + 2, last, db);
3866 if (t != first + 2) {
3867 if (db.names.empty())
3869 db.names.back().first.insert(0, "VTT for ");
3874 // TI <type> # typeinfo structure
3875 t = parse_type(first + 2, last, db);
3876 if (t != first + 2) {
3877 if (db.names.empty())
3879 db.names.back().first.insert(0, "typeinfo for ");
3884 // TS <type> # typeinfo name (null-terminated byte string)
3885 t = parse_type(first + 2, last, db);
3886 if (t != first + 2) {
3887 if (db.names.empty())
3889 db.names.back().first.insert(0, "typeinfo name for ");
3894 // Tc <call-offset> <call-offset> <base encoding>
3896 const char *t0 = parse_call_offset(first + 2, last);
3897 if (t0 == first + 2)
3899 const char *t1 = parse_call_offset(t0, last);
3902 t = parse_encoding(t1, last, db);
3904 if (db.names.empty())
3906 db.names.back().first.insert(0, "covariant return thunk to ");
3912 // extension ::= TC <first type> <number> _ <second type> # construction
3913 // vtable for second-in-first
3914 t = parse_type(first + 2, last, db);
3915 if (t != first + 2) {
3916 const char *t0 = parse_number(t, last);
3917 if (t0 != t && t0 != last && *t0 == '_') {
3918 const char *t1 = parse_type(++t0, last, db);
3920 if (db.names.size() < 2)
3922 auto left = db.names.back().move_full();
3923 db.names.pop_back();
3924 if (db.names.empty())
3926 db.names.back().first = "construction vtable for " +
3927 std::move(left) + "-in-" +
3928 db.names.back().move_full();
3935 // TW <object name> # Thread-local wrapper
3936 t = parse_name(first + 2, last, db);
3937 if (t != first + 2) {
3938 if (db.names.empty())
3940 db.names.back().first.insert(0, "thread-local wrapper routine for ");
3945 // TH <object name> # Thread-local initialization
3946 t = parse_name(first + 2, last, db);
3947 if (t != first + 2) {
3948 if (db.names.empty())
3950 db.names.back().first.insert(
3951 0, "thread-local initialization routine for ");
3956 // T <call-offset> <base encoding>
3958 const char *t0 = parse_call_offset(first + 1, last);
3959 if (t0 == first + 1)
3961 t = parse_encoding(t0, last, db);
3963 if (db.names.empty())
3965 if (first[1] == 'v') {
3966 db.names.back().first.insert(0, "virtual thunk to ");
3969 db.names.back().first.insert(0, "non-virtual thunk to ");
3980 // GV <object name> # Guard variable for one-time initialization
3981 t = parse_name(first + 2, last, db);
3982 if (t != first + 2) {
3983 if (db.names.empty())
3985 db.names.back().first.insert(0, "guard variable for ");
3990 // extension ::= GR <object name> # reference temporary for object
3991 t = parse_name(first + 2, last, db);
3992 if (t != first + 2) {
3993 if (db.names.empty())
3995 db.names.back().first.insert(0, "reference temporary for ");
4007 template <class T> class save_value {
4012 save_value(T &restore) : restore_(restore), original_value_(restore) {}
4014 ~save_value() { restore_ = std::move(original_value_); }
4016 save_value(const save_value &) = delete;
4017 save_value &operator=(const save_value &) = delete;
4021 // <encoding> ::= <function name> <bare-function-type>
4023 // ::= <special-name>
4026 static const char *parse_encoding(const char *first, const char *last, C &db) {
4027 if (first != last) {
4028 save_value<decltype(db.encoding_depth)> su(db.encoding_depth);
4029 ++db.encoding_depth;
4030 save_value<decltype(db.tag_templates)> sb(db.tag_templates);
4031 if (db.encoding_depth > 1)
4032 db.tag_templates = true;
4036 first = parse_special_name(first, last, db);
4039 bool ends_with_template_args = false;
4040 const char *t = parse_name(first, last, db, &ends_with_template_args);
4041 unsigned cv = db.cv;
4042 unsigned ref = db.ref;
4044 if (t != last && *t != 'E' && *t != '.') {
4045 save_value<bool> sb2(db.tag_templates);
4046 db.tag_templates = false;
4049 if (db.names.empty())
4051 const std::string &nm = db.names.back().first;
4054 if (!db.parsed_ctor_dtor_cv && ends_with_template_args) {
4055 t2 = parse_type(t, last, db);
4058 if (db.names.size() < 2)
4060 auto ret1 = std::move(db.names.back().first);
4061 ret2 = std::move(db.names.back().second);
4064 db.names.pop_back();
4065 if (db.names.empty())
4068 db.names.back().first.insert(0, ret1);
4071 db.names.back().first += '(';
4072 if (t != last && *t == 'v') {
4075 bool first_arg = true;
4077 size_t k0 = db.names.size();
4078 t2 = parse_type(t, last, db);
4079 size_t k1 = db.names.size();
4084 for (size_t k = k0; k < k1; ++k) {
4087 tmp += db.names[k].move_full();
4089 for (size_t k = k0; k < k1; ++k) {
4090 if (db.names.empty())
4092 db.names.pop_back();
4095 if (db.names.empty())
4098 db.names.back().first += ", ";
4101 db.names.back().first += tmp;
4107 if (db.names.empty())
4109 db.names.back().first += ')';
4111 db.names.back().first.append(" const");
4112 if (cv & CV_volatile)
4113 db.names.back().first.append(" volatile");
4114 if (cv & CV_restrict)
4115 db.names.back().first.append(" restrict");
4117 db.names.back().first.append(" &");
4119 db.names.back().first.append(" &&");
4120 db.names.back().first += ret2;
4133 // _block_invoke<decimal-digit>+
4134 // _block_invoke_<decimal-digit>+
4137 static const char *parse_block_invoke(const char *first, const char *last,
4139 if (last - first >= 13) {
4140 const char test[] = "_block_invoke";
4141 const char *t = first;
4142 for (int i = 0; i < 13; ++i, ++t) {
4148 // must have at least 1 decimal digit
4149 if (++t == last || !std::isdigit(*t))
4153 // parse zero or more digits
4154 while (t != last && isdigit(*t))
4157 if (db.names.empty())
4159 db.names.back().first.insert(0, "invocation function for block in ");
4166 // <dot-suffix> := .<anything and everything>
4169 static const char *parse_dot_suffix(const char *first, const char *last,
4171 if (first != last && *first == '.') {
4172 if (db.names.empty())
4174 db.names.back().first += " (" + std::string(first, last) + ")";
4180 // <block-involcaton-function> ___Z<encoding>_block_invoke
4181 // <block-involcaton-function> ___Z<encoding>_block_invoke<decimal-digit>+
4182 // <block-involcaton-function> ___Z<encoding>_block_invoke_<decimal-digit>+
4183 // <mangled-name> ::= _Z<encoding>
4187 static void demangle(const char *first, const char *last, C &db, int &status) {
4188 if (first >= last) {
4189 status = invalid_mangled_name;
4192 if (*first == '_') {
4193 if (last - first >= 4) {
4194 if (first[1] == 'Z') {
4195 const char *t = parse_encoding(first + 2, last, db);
4196 if (t != first + 2 && t != last && *t == '.')
4197 t = parse_dot_suffix(t, last, db);
4199 status = invalid_mangled_name;
4200 } else if (first[1] == '_' && first[2] == '_' && first[3] == 'Z') {
4201 const char *t = parse_encoding(first + 4, last, db);
4202 if (t != first + 4 && t != last) {
4203 const char *t1 = parse_block_invoke(t, last, db);
4205 status = invalid_mangled_name;
4207 status = invalid_mangled_name;
4209 status = invalid_mangled_name;
4211 status = invalid_mangled_name;
4213 const char *t = parse_type(first, last, db);
4215 status = invalid_mangled_name;
4217 if (status == success && db.names.empty())
4218 status = invalid_mangled_name;
4222 template <class StrT> struct string_pair {
4226 string_pair() = default;
4227 string_pair(StrT f) : first(std::move(f)) {}
4228 string_pair(StrT f, StrT s) : first(std::move(f)), second(std::move(s)) {}
4229 template <size_t N> string_pair(const char (&s)[N]) : first(s, N - 1) {}
4231 size_t size() const { return first.size() + second.size(); }
4232 StrT full() const { return first + second; }
4233 StrT move_full() { return std::move(first) + std::move(second); }
4237 typedef std::vector<string_pair<std::string>> sub_type;
4238 typedef std::vector<sub_type> template_param_type;
4240 template_param_type subs;
4241 std::vector<template_param_type> template_param;
4244 unsigned encoding_depth = 0;
4245 bool parsed_ctor_dtor_cv = false;
4246 bool tag_templates = true;
4247 bool fix_forward_references = false;
4248 bool try_to_parse_template_args = true;
4250 Db() : subs(0, names), template_param(0, subs) {}
4254 char *llvm::itaniumDemangle(const char *mangled_name, char *buf, size_t *n,
4256 if (mangled_name == nullptr || (buf != nullptr && n == nullptr)) {
4258 *status = invalid_args;
4261 size_t internal_size = buf != nullptr ? *n : 0;
4263 db.template_param.emplace_back();
4264 int internal_status = success;
4265 size_t len = std::strlen(mangled_name);
4266 demangle(mangled_name, mangled_name + len, db, internal_status);
4267 if (internal_status == success && db.fix_forward_references &&
4268 !db.template_param.empty() && !db.template_param.front().empty()) {
4269 db.fix_forward_references = false;
4270 db.tag_templates = false;
4273 demangle(mangled_name, mangled_name + len, db, internal_status);
4274 if (db.fix_forward_references)
4275 internal_status = invalid_mangled_name;
4277 if (internal_status == success) {
4278 size_t sz = db.names.back().size() + 1;
4279 if (sz > internal_size) {
4280 char *newbuf = static_cast<char *>(std::realloc(buf, sz));
4281 if (newbuf == nullptr) {
4282 internal_status = memory_alloc_failure;
4290 if (buf != nullptr) {
4291 db.names.back().first += db.names.back().second;
4292 std::memcpy(buf, db.names.back().first.data(), sz - 1);
4293 buf[sz - 1] = char(0);
4298 *status = internal_status;