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//===- ItaniumDemangle.cpp ------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Demangle/Demangle.h"
// This file exports a single function: llvm::itanium_demangle.
// It also has no dependencies on the rest of llvm. It is implemented this way
// so that it can be easily reused in libcxxabi.
#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <numeric>
#include <string>
#include <vector>
#ifdef _MSC_VER
// snprintf is implemented in VS 2015
#if _MSC_VER < 1900
#define snprintf _snprintf_s
#endif
#endif
enum {
unknown_error = -4,
invalid_args = -3,
invalid_mangled_name,
memory_alloc_failure,
success
};
template <class C>
static const char *parse_type(const char *first, const char *last, C &db);
template <class C>
static const char *parse_encoding(const char *first, const char *last, C &db);
template <class C>
static const char *parse_name(const char *first, const char *last, C &db,
bool *ends_with_template_args = 0);
template <class C>
static const char *parse_expression(const char *first, const char *last, C &db);
template <class C>
static const char *parse_template_args(const char *first, const char *last,
C &db);
template <class C>
static const char *parse_operator_name(const char *first, const char *last,
C &db);
template <class C>
static const char *parse_unqualified_name(const char *first, const char *last,
C &db);
template <class C>
static const char *parse_decltype(const char *first, const char *last, C &db);
// <number> ::= [n] <non-negative decimal integer>
static const char *parse_number(const char *first, const char *last) {
if (first != last) {
const char *t = first;
if (*t == 'n')
++t;
if (t != last) {
if (*t == '0') {
first = t + 1;
} else if ('1' <= *t && *t <= '9') {
first = t + 1;
while (first != last && std::isdigit(*first))
++first;
}
}
}
return first;
}
namespace {
template <class Float> struct float_data;
template <> struct float_data<float> {
static const size_t mangled_size = 8;
static const size_t max_demangled_size = 24;
static const char *spec;
};
const char *float_data<float>::spec = "%af";
template <> struct float_data<double> {
static const size_t mangled_size = 16;
static const size_t max_demangled_size = 32;
static const char *spec;
};
const char *float_data<double>::spec = "%a";
template <> struct float_data<long double> {
#if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \
defined(__wasm__)
static const size_t mangled_size = 32;
#elif defined(__arm__) || defined(__mips__) || defined(__hexagon__)
static const size_t mangled_size = 16;
#else
static const size_t mangled_size =
20; // May need to be adjusted to 16 or 24 on other platforms
#endif
static const size_t max_demangled_size = 40;
static const char *spec;
};
const char *float_data<long double>::spec = "%LaL";
}
template <class Float, class C>
static const char *parse_floating_number(const char *first, const char *last,
C &db) {
const size_t N = float_data<Float>::mangled_size;
if (static_cast<std::size_t>(last - first) > N) {
last = first + N;
union {
Float value;
char buf[sizeof(Float)];
};
const char *t = first;
char *e = buf;
for (; t != last; ++t, ++e) {
if (!isxdigit(*t))
return first;
unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
: static_cast<unsigned>(*t - 'a' + 10);
++t;
unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
: static_cast<unsigned>(*t - 'a' + 10);
*e = static_cast<char>((d1 << 4) + d0);
}
if (*t == 'E') {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
std::reverse(buf, e);
#endif
char num[float_data<Float>::max_demangled_size] = {0};
int n = snprintf(num, sizeof(num), float_data<Float>::spec, value);
if (static_cast<std::size_t>(n) >= sizeof(num))
return first;
db.names.push_back(std::string(num, static_cast<std::size_t>(n)));
first = t + 1;
}
}
return first;
}
// <source-name> ::= <positive length number> <identifier>
template <class C>
static const char *parse_source_name(const char *first, const char *last,
C &db) {
if (first != last) {
char c = *first;
if (isdigit(c) && first + 1 != last) {
const char *t = first + 1;
size_t n = static_cast<size_t>(c - '0');
for (c = *t; isdigit(c); c = *t) {
n = n * 10 + static_cast<size_t>(c - '0');
if (++t == last)
return first;
}
if (static_cast<size_t>(last - t) >= n) {
std::string r(t, n);
if (r.substr(0, 10) == "_GLOBAL__N")
db.names.push_back("(anonymous namespace)");
else
db.names.push_back(std::move(r));
first = t + n;
}
}
}
return first;
}
// <substitution> ::= S <seq-id> _
// ::= S_
// <substitution> ::= Sa # ::std::allocator
// <substitution> ::= Sb # ::std::basic_string
// <substitution> ::= Ss # ::std::basic_string < char,
// ::std::char_traits<char>,
// ::std::allocator<char> >
// <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> >
// <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> >
// <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >
template <class C>
static const char *parse_substitution(const char *first, const char *last,
C &db) {
if (last - first >= 2) {
if (*first == 'S') {
switch (first[1]) {
case 'a':
db.names.push_back("std::allocator");
first += 2;
break;
case 'b':
db.names.push_back("std::basic_string");
first += 2;
break;
case 's':
db.names.push_back("std::string");
first += 2;
break;
case 'i':
db.names.push_back("std::istream");
first += 2;
break;
case 'o':
db.names.push_back("std::ostream");
first += 2;
break;
case 'd':
db.names.push_back("std::iostream");
first += 2;
break;
case '_':
if (!db.subs.empty()) {
for (const auto &n : db.subs.front())
db.names.push_back(n);
first += 2;
}
break;
default:
if (std::isdigit(first[1]) || std::isupper(first[1])) {
size_t sub = 0;
const char *t = first + 1;
if (std::isdigit(*t))
sub = static_cast<size_t>(*t - '0');
else
sub = static_cast<size_t>(*t - 'A') + 10;
for (++t; t != last && (std::isdigit(*t) || std::isupper(*t)); ++t) {
sub *= 36;
if (std::isdigit(*t))
sub += static_cast<size_t>(*t - '0');
else
sub += static_cast<size_t>(*t - 'A') + 10;
}
if (t == last || *t != '_')
return first;
++sub;
if (sub < db.subs.size()) {
for (const auto &n : db.subs[sub])
db.names.push_back(n);
first = t + 1;
}
}
break;
}
}
}
return first;
}
// <builtin-type> ::= v # void
// ::= w # wchar_t
// ::= b # bool
// ::= c # char
// ::= a # signed char
// ::= h # unsigned char
// ::= s # short
// ::= t # unsigned short
// ::= i # int
// ::= j # unsigned int
// ::= l # long
// ::= m # unsigned long
// ::= x # long long, __int64
// ::= y # unsigned long long, __int64
// ::= n # __int128
// ::= o # unsigned __int128
// ::= f # float
// ::= d # double
// ::= e # long double, __float80
// ::= g # __float128
// ::= z # ellipsis
// ::= Dd # IEEE 754r decimal floating point (64 bits)
// ::= De # IEEE 754r decimal floating point (128 bits)
// ::= Df # IEEE 754r decimal floating point (32 bits)
// ::= Dh # IEEE 754r half-precision floating point (16 bits)
// ::= Di # char32_t
// ::= Ds # char16_t
// ::= Da # auto (in dependent new-expressions)
// ::= Dc # decltype(auto)
// ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
// ::= u <source-name> # vendor extended type
template <class C>
static const char *parse_builtin_type(const char *first, const char *last,
C &db) {
if (first != last) {
switch (*first) {
case 'v':
db.names.push_back("void");
++first;
break;
case 'w':
db.names.push_back("wchar_t");
++first;
break;
case 'b':
db.names.push_back("bool");
++first;
break;
case 'c':
db.names.push_back("char");
++first;
break;
case 'a':
db.names.push_back("signed char");
++first;
break;
case 'h':
db.names.push_back("unsigned char");
++first;
break;
case 's':
db.names.push_back("short");
++first;
break;
case 't':
db.names.push_back("unsigned short");
++first;
break;
case 'i':
db.names.push_back("int");
++first;
break;
case 'j':
db.names.push_back("unsigned int");
++first;
break;
case 'l':
db.names.push_back("long");
++first;
break;
case 'm':
db.names.push_back("unsigned long");
++first;
break;
case 'x':
db.names.push_back("long long");
++first;
break;
case 'y':
db.names.push_back("unsigned long long");
++first;
break;
case 'n':
db.names.push_back("__int128");
++first;
break;
case 'o':
db.names.push_back("unsigned __int128");
++first;
break;
case 'f':
db.names.push_back("float");
++first;
break;
case 'd':
db.names.push_back("double");
++first;
break;
case 'e':
db.names.push_back("long double");
++first;
break;
case 'g':
db.names.push_back("__float128");
++first;
break;
case 'z':
db.names.push_back("...");
++first;
break;
case 'u': {
const char *t = parse_source_name(first + 1, last, db);
if (t != first + 1)
first = t;
} break;
case 'D':
if (first + 1 != last) {
switch (first[1]) {
case 'd':
db.names.push_back("decimal64");
first += 2;
break;
case 'e':
db.names.push_back("decimal128");
first += 2;
break;
case 'f':
db.names.push_back("decimal32");
first += 2;
break;
case 'h':
db.names.push_back("decimal16");
first += 2;
break;
case 'i':
db.names.push_back("char32_t");
first += 2;
break;
case 's':
db.names.push_back("char16_t");
first += 2;
break;
case 'a':
db.names.push_back("auto");
first += 2;
break;
case 'c':
db.names.push_back("decltype(auto)");
first += 2;
break;
case 'n':
db.names.push_back("std::nullptr_t");
first += 2;
break;
}
}
break;
}
}
return first;
}
// <CV-qualifiers> ::= [r] [V] [K]
static const char *parse_cv_qualifiers(const char *first, const char *last,
unsigned &cv) {
cv = 0;
if (first != last) {
if (*first == 'r') {
cv |= 4;
++first;
}
if (*first == 'V') {
cv |= 2;
++first;
}
if (*first == 'K') {
cv |= 1;
++first;
}
}
return first;
}
// <template-param> ::= T_ # first template parameter
// ::= T <parameter-2 non-negative number> _
template <class C>
static const char *parse_template_param(const char *first, const char *last,
C &db) {
if (last - first >= 2) {
if (*first == 'T') {
if (first[1] == '_') {
if (db.template_param.empty())
return first;
if (!db.template_param.back().empty()) {
for (auto &t : db.template_param.back().front())
db.names.push_back(t);
first += 2;
} else {
db.names.push_back("T_");
first += 2;
db.fix_forward_references = true;
}
} else if (isdigit(first[1])) {
const char *t = first + 1;
size_t sub = static_cast<size_t>(*t - '0');
for (++t; t != last && isdigit(*t); ++t) {
sub *= 10;
sub += static_cast<size_t>(*t - '0');
}
if (t == last || *t != '_' || db.template_param.empty())
return first;
++sub;
if (sub < db.template_param.back().size()) {
for (auto &temp : db.template_param.back()[sub])
db.names.push_back(temp);
first = t + 1;
} else {
db.names.push_back(std::string(first, t + 1));
first = t + 1;
db.fix_forward_references = true;
}
}
}
}
return first;
}
// cc <type> <expression> # const_cast<type>
// (expression)
template <class C>
static const char *parse_const_cast_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'c' && first[1] == 'c') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto expr = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back() =
"const_cast<" + db.names.back().move_full() + ">(" + expr + ")";
first = t1;
}
}
}
return first;
}
// dc <type> <expression> # dynamic_cast<type>
// (expression)
template <class C>
static const char *parse_dynamic_cast_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'd' && first[1] == 'c') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto expr = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back() =
"dynamic_cast<" + db.names.back().move_full() + ">(" + expr + ")";
first = t1;
}
}
}
return first;
}
// rc <type> <expression> # reinterpret_cast<type>
// (expression)
template <class C>
static const char *parse_reinterpret_cast_expr(const char *first,
const char *last, C &db) {
if (last - first >= 3 && first[0] == 'r' && first[1] == 'c') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto expr = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back() = "reinterpret_cast<" + db.names.back().move_full() +
">(" + expr + ")";
first = t1;
}
}
}
return first;
}
// sc <type> <expression> # static_cast<type>
// (expression)
template <class C>
static const char *parse_static_cast_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 'c') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto expr = db.names.back().move_full();
db.names.pop_back();
db.names.back() =
"static_cast<" + db.names.back().move_full() + ">(" + expr + ")";
first = t1;
}
}
}
return first;
}
// sp <expression> # pack expansion
template <class C>
static const char *parse_pack_expansion(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 'p') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2)
first = t;
}
return first;
}
// st <type> # sizeof (a type)
template <class C>
static const char *parse_sizeof_type_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 't') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
// sz <expr> # sizeof (a expression)
template <class C>
static const char *parse_sizeof_expr_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 'z') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "sizeof (" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
// sZ <template-param> # size of a parameter
// pack
template <class C>
static const char *parse_sizeof_param_pack_expr(const char *first,
const char *last, C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
first[2] == 'T') {
size_t k0 = db.names.size();
const char *t = parse_template_param(first + 2, last, db);
size_t k1 = db.names.size();
if (t != first + 2) {
std::string tmp("sizeof...(");
size_t k = k0;
if (k != k1) {
tmp += db.names[k].move_full();
for (++k; k != k1; ++k)
tmp += ", " + db.names[k].move_full();
}
tmp += ")";
for (; k1 != k0; --k1)
db.names.pop_back();
db.names.push_back(std::move(tmp));
first = t;
}
}
return first;
}
// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, first parameter
// ::= fp <top-level CV-qualifiers> <parameter-2 non-negative
// number> _ # L == 0, second and later parameters
// ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
// _ # L > 0, first parameter
// ::= fL <L-1 non-negative number> p <top-level CV-qualifiers>
// <parameter-2 non-negative number> _ # L > 0, second and
// later parameters
template <class C>
static const char *parse_function_param(const char *first, const char *last,
C &db) {
if (last - first >= 3 && *first == 'f') {
if (first[1] == 'p') {
unsigned cv;
const char *t = parse_cv_qualifiers(first + 2, last, cv);
const char *t1 = parse_number(t, last);
if (t1 != last && *t1 == '_') {
db.names.push_back("fp" + std::string(t, t1));
first = t1 + 1;
}
} else if (first[1] == 'L') {
unsigned cv;
const char *t0 = parse_number(first + 2, last);
if (t0 != last && *t0 == 'p') {
++t0;
const char *t = parse_cv_qualifiers(t0, last, cv);
const char *t1 = parse_number(t, last);
if (t1 != last && *t1 == '_') {
db.names.push_back("fp" + std::string(t, t1));
first = t1 + 1;
}
}
}
}
return first;
}
// sZ <function-param> # size of a function
// parameter pack
template <class C>
static const char *parse_sizeof_function_param_pack_expr(const char *first,
const char *last,
C &db) {
if (last - first >= 3 && first[0] == 's' && first[1] == 'Z' &&
first[2] == 'f') {
const char *t = parse_function_param(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "sizeof...(" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
// te <expression> # typeid (expression)
// ti <type> # typeid (type)
template <class C>
static const char *parse_typeid_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 't' &&
(first[1] == 'e' || first[1] == 'i')) {
const char *t;
if (first[1] == 'e')
t = parse_expression(first + 2, last, db);
else
t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "typeid(" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
// tw <expression> # throw expression
template <class C>
static const char *parse_throw_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 't' && first[1] == 'w') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "throw " + db.names.back().move_full();
first = t;
}
}
return first;
}
// ds <expression> <expression> # expr.*expr
template <class C>
static const char *parse_dot_star_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'd' && first[1] == 's') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto expr = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += ".*" + expr;
first = t1;
}
}
}
return first;
}
// <simple-id> ::= <source-name> [ <template-args> ]
template <class C>
static const char *parse_simple_id(const char *first, const char *last, C &db) {
if (first != last) {
const char *t = parse_source_name(first, last, db);
if (t != first) {
const char *t1 = parse_template_args(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
}
first = t1;
} else
first = t;
}
return first;
}
// <unresolved-type> ::= <template-param>
// ::= <decltype>
// ::= <substitution>
template <class C>
static const char *parse_unresolved_type(const char *first, const char *last,
C &db) {
if (first != last) {
const char *t = first;
switch (*first) {
case 'T': {
size_t k0 = db.names.size();
t = parse_template_param(first, last, db);
size_t k1 = db.names.size();
if (t != first && k1 == k0 + 1) {
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
} else {
for (; k1 != k0; --k1)
db.names.pop_back();
}
break;
}
case 'D':
t = parse_decltype(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
}
break;
case 'S':
t = parse_substitution(first, last, db);
if (t != first)
first = t;
else {
if (last - first > 2 && first[1] == 't') {
t = parse_unqualified_name(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "std::");
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
}
}
}
break;
}
}
return first;
}
// <destructor-name> ::= <unresolved-type> # e.g.,
// ~T or ~decltype(f())
// ::= <simple-id> # e.g.,
// ~A<2*N>
template <class C>
static const char *parse_destructor_name(const char *first, const char *last,
C &db) {
if (first != last) {
const char *t = parse_unresolved_type(first, last, db);
if (t == first)
t = parse_simple_id(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "~");
first = t;
}
}
return first;
}
// <base-unresolved-name> ::= <simple-id> #
// unresolved name
// extension ::= <operator-name> #
// unresolved operator-function-id
// extension ::= <operator-name> <template-args> #
// unresolved operator template-id
// ::= on <operator-name> #
// unresolved operator-function-id
// ::= on <operator-name> <template-args> #
// unresolved operator template-id
// ::= dn <destructor-name> #
// destructor or pseudo-destructor;
// #
// e.g.
// ~X or
// ~X<N-1>
template <class C>
static const char *parse_base_unresolved_name(const char *first,
const char *last, C &db) {
if (last - first >= 2) {
if ((first[0] == 'o' || first[0] == 'd') && first[1] == 'n') {
if (first[0] == 'o') {
const char *t = parse_operator_name(first + 2, last, db);
if (t != first + 2) {
first = parse_template_args(t, last, db);
if (first != t) {
if (db.names.size() < 2)
return first;
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
}
}
} else {
const char *t = parse_destructor_name(first + 2, last, db);
if (t != first + 2)
first = t;
}
} else {
const char *t = parse_simple_id(first, last, db);
if (t == first) {
t = parse_operator_name(first, last, db);
if (t != first) {
first = parse_template_args(t, last, db);
if (first != t) {
if (db.names.size() < 2)
return first;
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
}
}
} else
first = t;
}
}
return first;
}
// <unresolved-qualifier-level> ::= <simple-id>
template <class C>
static const char *parse_unresolved_qualifier_level(const char *first,
const char *last, C &db) {
return parse_simple_id(first, last, db);
}
// <unresolved-name>
// extension ::= srN <unresolved-type> [<template-args>]
// <unresolved-qualifier-level>* E <base-unresolved-name>
// ::= [gs] <base-unresolved-name> # x or
// (with "gs") ::x
// ::= [gs] sr <unresolved-qualifier-level>+ E
// <base-unresolved-name>
// # A::x,
// N::y,
// A<T>::z;
// "gs"
// means
// leading
// "::"
// ::= sr <unresolved-type> <base-unresolved-name> # T::x
// / decltype(p)::x
// extension ::= sr <unresolved-type> <template-args>
// <base-unresolved-name>
// #
// T::N::x
// /decltype(p)::N::x
// (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
// <base-unresolved-name>
template <class C>
static const char *parse_unresolved_name(const char *first, const char *last,
C &db) {
if (last - first > 2) {
const char *t = first;
bool global = false;
if (t[0] == 'g' && t[1] == 's') {
global = true;
t += 2;
}
const char *t2 = parse_base_unresolved_name(t, last, db);
if (t2 != t) {
if (global) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "::");
}
first = t2;
} else if (last - t > 2 && t[0] == 's' && t[1] == 'r') {
if (t[2] == 'N') {
t += 3;
const char *t1 = parse_unresolved_type(t, last, db);
if (t1 == t || t1 == last)
return first;
t = t1;
t1 = parse_template_args(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
t = t1;
if (t == last) {
db.names.pop_back();
return first;
}
}
while (*t != 'E') {
t1 = parse_unresolved_qualifier_level(t, last, db);
if (t1 == t || t1 == last || db.names.size() < 2)
return first;
auto s = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "::" + std::move(s);
t = t1;
}
++t;
t1 = parse_base_unresolved_name(t, last, db);
if (t1 == t) {
if (!db.names.empty())
db.names.pop_back();
return first;
}
if (db.names.size() < 2)
return first;
auto s = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "::" + std::move(s);
first = t1;
} else {
t += 2;
const char *t1 = parse_unresolved_type(t, last, db);
if (t1 != t) {
t = t1;
t1 = parse_template_args(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
t = t1;
}
t1 = parse_base_unresolved_name(t, last, db);
if (t1 == t) {
if (!db.names.empty())
db.names.pop_back();
return first;
}
if (db.names.size() < 2)
return first;
auto s = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "::" + std::move(s);
first = t1;
} else {
t1 = parse_unresolved_qualifier_level(t, last, db);
if (t1 == t || t1 == last)
return first;
t = t1;
if (global) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "::");
}
while (*t != 'E') {
t1 = parse_unresolved_qualifier_level(t, last, db);
if (t1 == t || t1 == last || db.names.size() < 2)
return first;
auto s = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "::" + std::move(s);
t = t1;
}
++t;
t1 = parse_base_unresolved_name(t, last, db);
if (t1 == t) {
if (!db.names.empty())
db.names.pop_back();
return first;
}
if (db.names.size() < 2)
return first;
auto s = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "::" + std::move(s);
first = t1;
}
}
}
}
return first;
}
// dt <expression> <unresolved-name> # expr.name
template <class C>
static const char *parse_dot_expr(const char *first, const char *last, C &db) {
if (last - first >= 3 && first[0] == 'd' && first[1] == 't') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_unresolved_name(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first += "." + name;
first = t1;
}
}
}
return first;
}
// cl <expression>+ E # call
template <class C>
static const char *parse_call_expr(const char *first, const char *last, C &db) {
if (last - first >= 4 && first[0] == 'c' && first[1] == 'l') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
if (t == last)
return first;
if (db.names.empty())
return first;
db.names.back().first += db.names.back().second;
db.names.back().second = std::string();
db.names.back().first.append("(");
bool first_expr = true;
while (*t != 'E') {
const char *t1 = parse_expression(t, last, db);
if (t1 == t || t1 == last)
return first;
if (db.names.empty())
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (!tmp.empty()) {
if (db.names.empty())
return first;
if (!first_expr) {
db.names.back().first.append(", ");
first_expr = false;
}
db.names.back().first.append(tmp);
}
t = t1;
}
++t;
if (db.names.empty())
return first;
db.names.back().first.append(")");
first = t;
}
}
return first;
}
// [gs] nw <expression>* _ <type> E # new (expr-list) type
// [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type
// (init)
// [gs] na <expression>* _ <type> E # new[] (expr-list) type
// [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type
// (init)
// <initializer> ::= pi <expression>* E # parenthesized
// initialization
template <class C>
static const char *parse_new_expr(const char *first, const char *last, C &db) {
if (last - first >= 4) {
const char *t = first;
bool parsed_gs = false;
if (t[0] == 'g' && t[1] == 's') {
t += 2;
parsed_gs = true;
}
if (t[0] == 'n' && (t[1] == 'w' || t[1] == 'a')) {
bool is_array = t[1] == 'a';
t += 2;
if (t == last)
return first;
bool has_expr_list = false;
bool first_expr = true;
while (*t != '_') {
const char *t1 = parse_expression(t, last, db);
if (t1 == t || t1 == last)
return first;
has_expr_list = true;
if (!first_expr) {
if (db.names.empty())
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (!tmp.empty()) {
if (db.names.empty())
return first;
db.names.back().first.append(", ");
db.names.back().first.append(tmp);
first_expr = false;
}
}
t = t1;
}
++t;
const char *t1 = parse_type(t, last, db);
if (t1 == t || t1 == last)
return first;
t = t1;
bool has_init = false;
if (last - t >= 3 && t[0] == 'p' && t[1] == 'i') {
t += 2;
has_init = true;
first_expr = true;
while (*t != 'E') {
t1 = parse_expression(t, last, db);
if (t1 == t || t1 == last)
return first;
if (!first_expr) {
if (db.names.empty())
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (!tmp.empty()) {
if (db.names.empty())
return first;
db.names.back().first.append(", ");
db.names.back().first.append(tmp);
first_expr = false;
}
}
t = t1;
}
}
if (*t != 'E')
return first;
std::string init_list;
if (has_init) {
if (db.names.empty())
return first;
init_list = db.names.back().move_full();
db.names.pop_back();
}
if (db.names.empty())
return first;
auto type = db.names.back().move_full();
db.names.pop_back();
std::string expr_list;
if (has_expr_list) {
if (db.names.empty())
return first;
expr_list = db.names.back().move_full();
db.names.pop_back();
}
std::string r;
if (parsed_gs)
r = "::";
if (is_array)
r += "[] ";
else
r += " ";
if (has_expr_list)
r += "(" + expr_list + ") ";
r += type;
if (has_init)
r += " (" + init_list + ")";
db.names.push_back(std::move(r));
first = t + 1;
}
}
return first;
}
// cv <type> <expression> # conversion with one
// argument
// cv <type> _ <expression>* E # conversion with a
// different number of arguments
template <class C>
static const char *parse_conversion_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'c' && first[1] == 'v') {
bool try_to_parse_template_args = db.try_to_parse_template_args;
db.try_to_parse_template_args = false;
const char *t = parse_type(first + 2, last, db);
db.try_to_parse_template_args = try_to_parse_template_args;
if (t != first + 2 && t != last) {
if (*t != '_') {
const char *t1 = parse_expression(t, last, db);
if (t1 == t)
return first;
t = t1;
} else {
++t;
if (t == last)
return first;
if (*t == 'E')
db.names.emplace_back();
else {
bool first_expr = true;
while (*t != 'E') {
const char *t1 = parse_expression(t, last, db);
if (t1 == t || t1 == last)
return first;
if (!first_expr) {
if (db.names.empty())
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (!tmp.empty()) {
if (db.names.empty())
return first;
db.names.back().first.append(", ");
db.names.back().first.append(tmp);
first_expr = false;
}
}
t = t1;
}
}
++t;
}
if (db.names.size() < 2)
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
db.names.back() = "(" + db.names.back().move_full() + ")(" + tmp + ")";
first = t;
}
}
return first;
}
// pt <expression> <expression> # expr->name
template <class C>
static const char *parse_arrow_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'p' && first[1] == 't') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
const char *t1 = parse_expression(t, last, db);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += "->";
db.names.back().first += tmp;
first = t1;
}
}
}
return first;
}
// <ref-qualifier> ::= R # & ref-qualifier
// <ref-qualifier> ::= O # && ref-qualifier
// <function-type> ::= F [Y] <bare-function-type> [<ref-qualifier>] E
template <class C>
static const char *parse_function_type(const char *first, const char *last,
C &db) {
if (first != last && *first == 'F') {
const char *t = first + 1;
if (t != last) {
if (*t == 'Y') {
/* extern "C" */
if (++t == last)
return first;
}
const char *t1 = parse_type(t, last, db);
if (t1 != t) {
t = t1;
std::string sig("(");
int ref_qual = 0;
while (true) {
if (t == last) {
db.names.pop_back();
return first;
}
if (*t == 'E') {
++t;
break;
}
if (*t == 'v') {
++t;
continue;
}
if (*t == 'R' && t + 1 != last && t[1] == 'E') {
ref_qual = 1;
++t;
continue;
}
if (*t == 'O' && t + 1 != last && t[1] == 'E') {
ref_qual = 2;
++t;
continue;
}
size_t k0 = db.names.size();
t1 = parse_type(t, last, db);
size_t k1 = db.names.size();
if (t1 == t || t1 == last)
return first;
for (size_t k = k0; k < k1; ++k) {
if (sig.size() > 1)
sig += ", ";
sig += db.names[k].move_full();
}
for (size_t k = k0; k < k1; ++k)
db.names.pop_back();
t = t1;
}
sig += ")";
switch (ref_qual) {
case 1:
sig += " &";
break;
case 2:
sig += " &&";
break;
}
if (db.names.empty())
return first;
db.names.back().first += " ";
db.names.back().second.insert(0, sig);
first = t;
}
}
}
return first;
}
// <pointer-to-member-type> ::= M <class type> <member type>
template <class C>
static const char *parse_pointer_to_member_type(const char *first,
const char *last, C &db) {
if (first != last && *first == 'M') {
const char *t = parse_type(first + 1, last, db);
if (t != first + 1) {
const char *t2 = parse_type(t, last, db);
if (t2 != t) {
if (db.names.size() < 2)
return first;
auto func = std::move(db.names.back());
db.names.pop_back();
auto class_type = std::move(db.names.back());
if (!func.second.empty() && func.second.front() == '(') {
db.names.back().first =
std::move(func.first) + "(" + class_type.move_full() + "::*";
db.names.back().second = ")" + std::move(func.second);
} else {
db.names.back().first =
std::move(func.first) + " " + class_type.move_full() + "::*";
db.names.back().second = std::move(func.second);
}
first = t2;
}
}
}
return first;
}
// <array-type> ::= A <positive dimension number> _ <element type>
// ::= A [<dimension expression>] _ <element type>
template <class C>
static const char *parse_array_type(const char *first, const char *last,
C &db) {
if (first != last && *first == 'A' && first + 1 != last) {
if (first[1] == '_') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
if (db.names.back().second.substr(0, 2) == " [")
db.names.back().second.erase(0, 1);
db.names.back().second.insert(0, " []");
first = t;
}
} else if ('1' <= first[1] && first[1] <= '9') {
const char *t = parse_number(first + 1, last);
if (t != last && *t == '_') {
const char *t2 = parse_type(t + 1, last, db);
if (t2 != t + 1) {
if (db.names.empty())
return first;
if (db.names.back().second.substr(0, 2) == " [")
db.names.back().second.erase(0, 1);
db.names.back().second.insert(0,
" [" + std::string(first + 1, t) + "]");
first = t2;
}
}
} else {
const char *t = parse_expression(first + 1, last, db);
if (t != first + 1 && t != last && *t == '_') {
const char *t2 = parse_type(++t, last, db);
if (t2 != t) {
if (db.names.size() < 2)
return first;
auto type = std::move(db.names.back());
db.names.pop_back();
auto expr = std::move(db.names.back());
db.names.back().first = std::move(type.first);
if (type.second.substr(0, 2) == " [")
type.second.erase(0, 1);
db.names.back().second =
" [" + expr.move_full() + "]" + std::move(type.second);
first = t2;
}
}
}
}
return first;
}
// <decltype> ::= Dt <expression> E # decltype of an id-expression or class
// member access (C++0x)
// ::= DT <expression> E # decltype of an expression (C++0x)
template <class C>
static const char *parse_decltype(const char *first, const char *last, C &db) {
if (last - first >= 4 && first[0] == 'D') {
switch (first[1]) {
case 't':
case 'T': {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2 && t != last && *t == 'E') {
if (db.names.empty())
return first;
db.names.back() = "decltype(" + db.names.back().move_full() + ")";
first = t + 1;
}
} break;
}
}
return first;
}
// extension:
// <vector-type> ::= Dv <positive dimension number> _
// <extended element type>
// ::= Dv [<dimension expression>] _ <element type>
// <extended element type> ::= <element type>
// ::= p # AltiVec vector pixel
template <class C>
static const char *parse_vector_type(const char *first, const char *last,
C &db) {
if (last - first > 3 && first[0] == 'D' && first[1] == 'v') {
if ('1' <= first[2] && first[2] <= '9') {
const char *t = parse_number(first + 2, last);
if (t == last || *t != '_')
return first;
const char *num = first + 2;
size_t sz = static_cast<size_t>(t - num);
if (++t != last) {
if (*t != 'p') {
const char *t1 = parse_type(t, last, db);
if (t1 != t) {
if (db.names.empty())
return first;
db.names.back().first += " vector[" + std::string(num, sz) + "]";
first = t1;
}
} else {
++t;
db.names.push_back("pixel vector[" + std::string(num, sz) + "]");
first = t;
}
}
} else {
std::string num;
const char *t1 = first + 2;
if (*t1 != '_') {
const char *t = parse_expression(t1, last, db);
if (t != t1) {
if (db.names.empty())
return first;
num = db.names.back().move_full();
db.names.pop_back();
t1 = t;
}
}
if (t1 != last && *t1 == '_' && ++t1 != last) {
const char *t = parse_type(t1, last, db);
if (t != t1) {
if (db.names.empty())
return first;
db.names.back().first += " vector[" + num + "]";
first = t;
}
}
}
}
return first;
}
// <type> ::= <builtin-type>
// ::= <function-type>
// ::= <class-enum-type>
// ::= <array-type>
// ::= <pointer-to-member-type>
// ::= <template-param>
// ::= <template-template-param> <template-args>
// ::= <decltype>
// ::= <substitution>
// ::= <CV-qualifiers> <type>
// ::= P <type> # pointer-to
// ::= R <type> # reference-to
// ::= O <type> # rvalue reference-to (C++0x)
// ::= C <type> # complex pair (C 2000)
// ::= G <type> # imaginary (C 2000)
// ::= Dp <type> # pack expansion (C++0x)
// ::= U <source-name> <type> # vendor extended type qualifier
// extension := U <objc-name> <objc-type> # objc-type<identifier>
// extension := <vector-type> # <vector-type> starts with Dv
// <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 +
// <number of digits in k1> + k1
// <objc-type> := <source-name> # PU<11+>objcproto 11objc_object<source-name>
// 11objc_object -> id<source-name>
template <class C>
static const char *parse_type(const char *first, const char *last, C &db) {
if (first != last) {
switch (*first) {
case 'r':
case 'V':
case 'K': {
unsigned cv = 0;
const char *t = parse_cv_qualifiers(first, last, cv);
if (t != first) {
bool is_function = *t == 'F';
size_t k0 = db.names.size();
const char *t1 = parse_type(t, last, db);
size_t k1 = db.names.size();
if (t1 != t) {
if (is_function)
db.subs.pop_back();
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k) {
if (is_function) {
size_t p = db.names[k].second.size();
if (db.names[k].second[p - 2] == '&')
p -= 3;
else if (db.names[k].second.back() == '&')
p -= 2;
if (cv & 1) {
db.names[k].second.insert(p, " const");
p += 6;
}
if (cv & 2) {
db.names[k].second.insert(p, " volatile");
p += 9;
}
if (cv & 4)
db.names[k].second.insert(p, " restrict");
} else {
if (cv & 1)
db.names[k].first.append(" const");
if (cv & 2)
db.names[k].first.append(" volatile");
if (cv & 4)
db.names[k].first.append(" restrict");
}
db.subs.back().push_back(db.names[k]);
}
first = t1;
}
}
} break;
default: {
const char *t = parse_builtin_type(first, last, db);
if (t != first) {
first = t;
} else {
switch (*first) {
case 'A':
t = parse_array_type(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
first = t;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
}
break;
case 'C':
t = parse_type(first + 1, last, db);
if (t != first + 1) {
if (db.names.empty())
return first;
db.names.back().first.append(" complex");
first = t;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
}
break;
case 'F':
t = parse_function_type(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
first = t;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
}
break;
case 'G':
t = parse_type(first + 1, last, db);
if (t != first + 1) {
if (db.names.empty())
return first;
db.names.back().first.append(" imaginary");
first = t;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
}
break;
case 'M':
t = parse_pointer_to_member_type(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
first = t;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
}
break;
case 'O': {
size_t k0 = db.names.size();
t = parse_type(first + 1, last, db);
size_t k1 = db.names.size();
if (t != first + 1) {
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k) {
if (db.names[k].second.substr(0, 2) == " [") {
db.names[k].first += " (";
db.names[k].second.insert(0, ")");
} else if (!db.names[k].second.empty() &&
db.names[k].second.front() == '(') {
db.names[k].first += "(";
db.names[k].second.insert(0, ")");
}
db.names[k].first.append("&&");
db.subs.back().push_back(db.names[k]);
}
first = t;
}
break;
}
case 'P': {
size_t k0 = db.names.size();
t = parse_type(first + 1, last, db);
size_t k1 = db.names.size();
if (t != first + 1) {
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k) {
if (db.names[k].second.substr(0, 2) == " [") {
db.names[k].first += " (";
db.names[k].second.insert(0, ")");
} else if (!db.names[k].second.empty() &&
db.names[k].second.front() == '(') {
db.names[k].first += "(";
db.names[k].second.insert(0, ")");
}
if (first[1] != 'U' ||
db.names[k].first.substr(0, 12) != "objc_object<") {
db.names[k].first.append("*");
} else {
db.names[k].first.replace(0, 11, "id");
}
db.subs.back().push_back(db.names[k]);
}
first = t;
}
break;
}
case 'R': {
size_t k0 = db.names.size();
t = parse_type(first + 1, last, db);
size_t k1 = db.names.size();
if (t != first + 1) {
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k) {
if (db.names[k].second.substr(0, 2) == " [") {
db.names[k].first += " (";
db.names[k].second.insert(0, ")");
} else if (!db.names[k].second.empty() &&
db.names[k].second.front() == '(') {
db.names[k].first += "(";
db.names[k].second.insert(0, ")");
}
db.names[k].first.append("&");
db.subs.back().push_back(db.names[k]);
}
first = t;
}
break;
}
case 'T': {
size_t k0 = db.names.size();
t = parse_template_param(first, last, db);
size_t k1 = db.names.size();
if (t != first) {
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k)
db.subs.back().push_back(db.names[k]);
if (db.try_to_parse_template_args && k1 == k0 + 1) {
const char *t1 = parse_template_args(t, last, db);
if (t1 != t) {
auto args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += std::move(args);
db.subs.push_back(typename C::sub_type(1, db.names.back()));
t = t1;
}
}
first = t;
}
break;
}
case 'U':
if (first + 1 != last) {
t = parse_source_name(first + 1, last, db);
if (t != first + 1) {
const char *t2 = parse_type(t, last, db);
if (t2 != t) {
if (db.names.size() < 2)
return first;
auto type = db.names.back().move_full();
db.names.pop_back();
if (db.names.back().first.substr(0, 9) != "objcproto") {
db.names.back() = type + " " + db.names.back().move_full();
} else {
auto proto = db.names.back().move_full();
db.names.pop_back();
t = parse_source_name(proto.data() + 9,
proto.data() + proto.size(), db);
if (t != proto.data() + 9) {
db.names.back() =
type + "<" + db.names.back().move_full() + ">";
} else {
db.names.push_back(type + " " + proto);
}
}
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t2;
}
}
}
break;
case 'S':
if (first + 1 != last && first[1] == 't') {
t = parse_name(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
}
} else {
t = parse_substitution(first, last, db);
if (t != first) {
first = t;
// Parsed a substitution. If the substitution is a
// <template-param> it might be followed by <template-args>.
t = parse_template_args(first, last, db);
if (t != first) {
if (db.names.size() < 2)
return first;
auto template_args = db.names.back().move_full();
db.names.pop_back();
db.names.back().first += template_args;
// Need to create substitution for <template-template-param>
// <template-args>
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
}
}
}
break;
case 'D':
if (first + 1 != last) {
switch (first[1]) {
case 'p': {
size_t k0 = db.names.size();
t = parse_type(first + 2, last, db);
size_t k1 = db.names.size();
if (t != first + 2) {
db.subs.emplace_back();
for (size_t k = k0; k < k1; ++k)
db.subs.back().push_back(db.names[k]);
first = t;
return first;
}
break;
}
case 't':
case 'T':
t = parse_decltype(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
return first;
}
break;
case 'v':
t = parse_vector_type(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
return first;
}
break;
}
}
// drop through
default:
// must check for builtin-types before class-enum-types to avoid
// ambiguities with operator-names
t = parse_builtin_type(first, last, db);
if (t != first) {
first = t;
} else {
t = parse_name(first, last, db);
if (t != first) {
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
first = t;
}
}
break;
}
}
break;
}
}
}
return first;
}
// <operator-name>
// ::= aa # &&
// ::= ad # & (unary)
// ::= an # &
// ::= aN # &=
// ::= aS # =
// ::= cl # ()
// ::= cm # ,
// ::= co # ~
// ::= cv <type> # (cast)
// ::= da # delete[]
// ::= de # * (unary)
// ::= dl # delete
// ::= dv # /
// ::= dV # /=
// ::= eo # ^
// ::= eO # ^=
// ::= eq # ==
// ::= ge # >=
// ::= gt # >
// ::= ix # []
// ::= le # <=
// ::= li <source-name> # operator ""
// ::= ls # <<
// ::= lS # <<=
// ::= lt # <
// ::= mi # -
// ::= mI # -=
// ::= ml # *
// ::= mL # *=
// ::= mm # -- (postfix in <expression> context)
// ::= na # new[]
// ::= ne # !=
// ::= ng # - (unary)
// ::= nt # !
// ::= nw # new
// ::= oo # ||
// ::= or # |
// ::= oR # |=
// ::= pm # ->*
// ::= pl # +
// ::= pL # +=
// ::= pp # ++ (postfix in <expression> context)
// ::= ps # + (unary)
// ::= pt # ->
// ::= qu # ?
// ::= rm # %
// ::= rM # %=
// ::= rs # >>
// ::= rS # >>=
// ::= v <digit> <source-name> # vendor extended
// operator
template <class C>
static const char *parse_operator_name(const char *first, const char *last,
C &db) {
if (last - first >= 2) {
switch (first[0]) {
case 'a':
switch (first[1]) {
case 'a':
db.names.push_back("operator&&");
first += 2;
break;
case 'd':
case 'n':
db.names.push_back("operator&");
first += 2;
break;
case 'N':
db.names.push_back("operator&=");
first += 2;
break;
case 'S':
db.names.push_back("operator=");
first += 2;
break;
}
break;
case 'c':
switch (first[1]) {
case 'l':
db.names.push_back("operator()");
first += 2;
break;
case 'm':
db.names.push_back("operator,");
first += 2;
break;
case 'o':
db.names.push_back("operator~");
first += 2;
break;
case 'v': {
bool try_to_parse_template_args = db.try_to_parse_template_args;
db.try_to_parse_template_args = false;
const char *t = parse_type(first + 2, last, db);
db.try_to_parse_template_args = try_to_parse_template_args;
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "operator ");
db.parsed_ctor_dtor_cv = true;
first = t;
}
} break;
}
break;
case 'd':
switch (first[1]) {
case 'a':
db.names.push_back("operator delete[]");
first += 2;
break;
case 'e':
db.names.push_back("operator*");
first += 2;
break;
case 'l':
db.names.push_back("operator delete");
first += 2;
break;
case 'v':
db.names.push_back("operator/");
first += 2;
break;
case 'V':
db.names.push_back("operator/=");
first += 2;
break;
}
break;
case 'e':
switch (first[1]) {
case 'o':
db.names.push_back("operator^");
first += 2;
break;
case 'O':
db.names.push_back("operator^=");
first += 2;
break;
case 'q':
db.names.push_back("operator==");
first += 2;
break;
}
break;
case 'g':
switch (first[1]) {
case 'e':
db.names.push_back("operator>=");
first += 2;
break;
case 't':
db.names.push_back("operator>");
first += 2;
break;
}
break;
case 'i':
if (first[1] == 'x') {
db.names.push_back("operator[]");
first += 2;
}
break;
case 'l':
switch (first[1]) {
case 'e':
db.names.push_back("operator<=");
first += 2;
break;
case 'i': {
const char *t = parse_source_name(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "operator\"\" ");
first = t;
}
} break;
case 's':
db.names.push_back("operator<<");
first += 2;
break;
case 'S':
db.names.push_back("operator<<=");
first += 2;
break;
case 't':
db.names.push_back("operator<");
first += 2;
break;
}
break;
case 'm':
switch (first[1]) {
case 'i':
db.names.push_back("operator-");
first += 2;
break;
case 'I':
db.names.push_back("operator-=");
first += 2;
break;
case 'l':
db.names.push_back("operator*");
first += 2;
break;
case 'L':
db.names.push_back("operator*=");
first += 2;
break;
case 'm':
db.names.push_back("operator--");
first += 2;
break;
}
break;
case 'n':
switch (first[1]) {
case 'a':
db.names.push_back("operator new[]");
first += 2;
break;
case 'e':
db.names.push_back("operator!=");
first += 2;
break;
case 'g':
db.names.push_back("operator-");
first += 2;
break;
case 't':
db.names.push_back("operator!");
first += 2;
break;
case 'w':
db.names.push_back("operator new");
first += 2;
break;
}
break;
case 'o':
switch (first[1]) {
case 'o':
db.names.push_back("operator||");
first += 2;
break;
case 'r':
db.names.push_back("operator|");
first += 2;
break;
case 'R':
db.names.push_back("operator|=");
first += 2;
break;
}
break;
case 'p':
switch (first[1]) {
case 'm':
db.names.push_back("operator->*");
first += 2;
break;
case 'l':
db.names.push_back("operator+");
first += 2;
break;
case 'L':
db.names.push_back("operator+=");
first += 2;
break;
case 'p':
db.names.push_back("operator++");
first += 2;
break;
case 's':
db.names.push_back("operator+");
first += 2;
break;
case 't':
db.names.push_back("operator->");
first += 2;
break;
}
break;
case 'q':
if (first[1] == 'u') {
db.names.push_back("operator?");
first += 2;
}
break;
case 'r':
switch (first[1]) {
case 'm':
db.names.push_back("operator%");
first += 2;
break;
case 'M':
db.names.push_back("operator%=");
first += 2;
break;
case 's':
db.names.push_back("operator>>");
first += 2;
break;
case 'S':
db.names.push_back("operator>>=");
first += 2;
break;
}
break;
case 'v':
if (std::isdigit(first[1])) {
const char *t = parse_source_name(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "operator ");
first = t;
}
}
break;
}
}
return first;
}
template <class C>
static const char *parse_integer_literal(const char *first, const char *last,
const std::string &lit, C &db) {
const char *t = parse_number(first, last);
if (t != first && t != last && *t == 'E') {
if (lit.size() > 3)
db.names.push_back("(" + lit + ")");
else
db.names.emplace_back();
if (*first == 'n') {
db.names.back().first += '-';
++first;
}
db.names.back().first.append(first, t);
if (lit.size() <= 3)
db.names.back().first += lit;
first = t + 1;
}
return first;
}
// <expr-primary> ::= L <type> <value number> E #
// integer literal
// ::= L <type> <value float> E #
// floating literal
// ::= L <string type> E #
// string literal
// ::= L <nullptr type> E #
// nullptr literal (i.e., "LDnE")
// ::= L <type> <real-part float> _ <imag-part float> E #
// complex floating point literal (C 2000)
// ::= L <mangled-name> E #
// external name
template <class C>
static const char *parse_expr_primary(const char *first, const char *last,
C &db) {
if (last - first >= 4 && *first == 'L') {
switch (first[1]) {
case 'w': {
const char *t = parse_integer_literal(first + 2, last, "wchar_t", db);
if (t != first + 2)
first = t;
} break;
case 'b':
if (first[3] == 'E') {
switch (first[2]) {
case '0':
db.names.push_back("false");
first += 4;
break;
case '1':
db.names.push_back("true");
first += 4;
break;
}
}
break;
case 'c': {
const char *t = parse_integer_literal(first + 2, last, "char", db);
if (t != first + 2)
first = t;
} break;
case 'a': {
const char *t = parse_integer_literal(first + 2, last, "signed char", db);
if (t != first + 2)
first = t;
} break;
case 'h': {
const char *t =
parse_integer_literal(first + 2, last, "unsigned char", db);
if (t != first + 2)
first = t;
} break;
case 's': {
const char *t = parse_integer_literal(first + 2, last, "short", db);
if (t != first + 2)
first = t;
} break;
case 't': {
const char *t =
parse_integer_literal(first + 2, last, "unsigned short", db);
if (t != first + 2)
first = t;
} break;
case 'i': {
const char *t = parse_integer_literal(first + 2, last, "", db);
if (t != first + 2)
first = t;
} break;
case 'j': {
const char *t = parse_integer_literal(first + 2, last, "u", db);
if (t != first + 2)
first = t;
} break;
case 'l': {
const char *t = parse_integer_literal(first + 2, last, "l", db);
if (t != first + 2)
first = t;
} break;
case 'm': {
const char *t = parse_integer_literal(first + 2, last, "ul", db);
if (t != first + 2)
first = t;
} break;
case 'x': {
const char *t = parse_integer_literal(first + 2, last, "ll", db);
if (t != first + 2)
first = t;
} break;
case 'y': {
const char *t = parse_integer_literal(first + 2, last, "ull", db);
if (t != first + 2)
first = t;
} break;
case 'n': {
const char *t = parse_integer_literal(first + 2, last, "__int128", db);
if (t != first + 2)
first = t;
} break;
case 'o': {
const char *t =
parse_integer_literal(first + 2, last, "unsigned __int128", db);
if (t != first + 2)
first = t;
} break;
case 'f': {
const char *t = parse_floating_number<float>(first + 2, last, db);
if (t != first + 2)
first = t;
} break;
case 'd': {
const char *t = parse_floating_number<double>(first + 2, last, db);
if (t != first + 2)
first = t;
} break;
case 'e': {
const char *t = parse_floating_number<long double>(first + 2, last, db);
if (t != first + 2)
first = t;
} break;
case '_':
if (first[2] == 'Z') {
const char *t = parse_encoding(first + 3, last, db);
if (t != first + 3 && t != last && *t == 'E')
first = t + 1;
}
break;
case 'T':
// Invalid mangled name per
// http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html
break;
default: {
// might be named type
const char *t = parse_type(first + 1, last, db);
if (t != first + 1 && t != last) {
if (*t != 'E') {
const char *n = t;
for (; n != last && isdigit(*n); ++n)
;
if (n != t && n != last && *n == 'E') {
if (db.names.empty())
return first;
db.names.back() =
"(" + db.names.back().move_full() + ")" + std::string(t, n);
first = n + 1;
break;
}
} else {
first = t + 1;
break;
}
}
}
}
}
return first;
}
static std::string base_name(std::string &s) {
if (s.empty())
return s;
if (s == "std::string") {
s = "std::basic_string<char, std::char_traits<char>, std::allocator<char> "
">";
return "basic_string";
}
if (s == "std::istream") {
s = "std::basic_istream<char, std::char_traits<char> >";
return "basic_istream";
}
if (s == "std::ostream") {
s = "std::basic_ostream<char, std::char_traits<char> >";
return "basic_ostream";
}
if (s == "std::iostream") {
s = "std::basic_iostream<char, std::char_traits<char> >";
return "basic_iostream";
}
const char *const pf = s.data();
const char *pe = pf + s.size();
if (pe[-1] == '>') {
unsigned c = 1;
while (true) {
if (--pe == pf)
return std::string();
if (pe[-1] == '<') {
if (--c == 0) {
--pe;
break;
}
} else if (pe[-1] == '>')
++c;
}
}
if (pe - pf <= 1)
return std::string();
const char *p0 = pe - 1;
for (; p0 != pf; --p0) {
if (*p0 == ':') {
++p0;
break;
}
}
return std::string(p0, pe);
}
// <ctor-dtor-name> ::= C1 # complete object constructor
// ::= C2 # base object constructor
// ::= C3 # complete object allocating constructor
// extension ::= C5 # ?
// ::= D0 # deleting destructor
// ::= D1 # complete object destructor
// ::= D2 # base object destructor
// extension ::= D5 # ?
template <class C>
static const char *parse_ctor_dtor_name(const char *first, const char *last,
C &db) {
if (last - first >= 2 && !db.names.empty()) {
switch (first[0]) {
case 'C':
switch (first[1]) {
case '1':
case '2':
case '3':
case '5':
if (db.names.empty())
return first;
db.names.push_back(base_name(db.names.back().first));
first += 2;
db.parsed_ctor_dtor_cv = true;
break;
}
break;
case 'D':
switch (first[1]) {
case '0':
case '1':
case '2':
case '5':
if (db.names.empty())
return first;
db.names.push_back("~" + base_name(db.names.back().first));
first += 2;
db.parsed_ctor_dtor_cv = true;
break;
}
break;
}
}
return first;
}
// <unnamed-type-name> ::= Ut [ <nonnegative number> ] _
// ::= <closure-type-name>
//
// <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
//
// <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda
// has no parameters
template <class C>
static const char *parse_unnamed_type_name(const char *first, const char *last,
C &db) {
if (last - first > 2 && first[0] == 'U') {
char type = first[1];
switch (type) {
case 't': {
db.names.push_back(std::string("'unnamed"));
const char *t0 = first + 2;
if (t0 == last) {
db.names.pop_back();
return first;
}
if (std::isdigit(*t0)) {
const char *t1 = t0 + 1;
while (t1 != last && std::isdigit(*t1))
++t1;
db.names.back().first.append(t0, t1);
t0 = t1;
}
db.names.back().first.push_back('\'');
if (t0 == last || *t0 != '_') {
db.names.pop_back();
return first;
}
first = t0 + 1;
} break;
case 'l': {
db.names.push_back(std::string("'lambda'("));
const char *t0 = first + 2;
if (first[2] == 'v') {
db.names.back().first += ')';
++t0;
} else {
const char *t1 = parse_type(t0, last, db);
if (t1 == t0) {
if (!db.names.empty())
db.names.pop_back();
return first;
}
if (db.names.size() < 2)
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
db.names.back().first.append(tmp);
t0 = t1;
while (true) {
t1 = parse_type(t0, last, db);
if (t1 == t0)
break;
if (db.names.size() < 2)
return first;
tmp = db.names.back().move_full();
db.names.pop_back();
if (!tmp.empty()) {
db.names.back().first.append(", ");
db.names.back().first.append(tmp);
}
t0 = t1;
}
if (db.names.empty())
return first;
db.names.back().first.append(")");
}
if (t0 == last || *t0 != 'E') {
if (!db.names.empty())
db.names.pop_back();
return first;
}
++t0;
if (t0 == last) {
if (!db.names.empty())
db.names.pop_back();
return first;
}
if (std::isdigit(*t0)) {
const char *t1 = t0 + 1;
while (t1 != last && std::isdigit(*t1))
++t1;
db.names.back().first.insert(db.names.back().first.begin() + 7, t0, t1);
t0 = t1;
}
if (t0 == last || *t0 != '_') {
if (!db.names.empty())
db.names.pop_back();
return first;
}
first = t0 + 1;
} break;
}
}
return first;
}
// <unqualified-name> ::= <operator-name>
// ::= <ctor-dtor-name>
// ::= <source-name>
// ::= <unnamed-type-name>
template <class C>
static const char *parse_unqualified_name(const char *first, const char *last,
C &db) {
if (first != last) {
const char *t;
switch (*first) {
case 'C':
case 'D':
t = parse_ctor_dtor_name(first, last, db);
if (t != first)
first = t;
break;
case 'U':
t = parse_unnamed_type_name(first, last, db);
if (t != first)
first = t;
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = parse_source_name(first, last, db);
if (t != first)
first = t;
break;
default:
t = parse_operator_name(first, last, db);
if (t != first)
first = t;
break;
};
}
return first;
}
// <unscoped-name> ::= <unqualified-name>
// ::= St <unqualified-name> # ::std::
// extension ::= StL<unqualified-name>
template <class C>
static const char *parse_unscoped_name(const char *first, const char *last,
C &db) {
if (last - first >= 2) {
const char *t0 = first;
bool St = false;
if (first[0] == 'S' && first[1] == 't') {
t0 += 2;
St = true;
if (t0 != last && *t0 == 'L')
++t0;
}
const char *t1 = parse_unqualified_name(t0, last, db);
if (t1 != t0) {
if (St) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "std::");
}
first = t1;
}
}
return first;
}
// at <type> # alignof (a type)
template <class C>
static const char *parse_alignof_type(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'a' && first[1] == 't') {
const char *t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
// az <expression> # alignof (a
// expression)
template <class C>
static const char *parse_alignof_expr(const char *first, const char *last,
C &db) {
if (last - first >= 3 && first[0] == 'a' && first[1] == 'z') {
const char *t = parse_expression(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first = "alignof (" + db.names.back().move_full() + ")";
first = t;
}
}
return first;
}
template <class C>
static const char *parse_noexcept_expression(const char *first,
const char *last, C &db) {
const char *t1 = parse_expression(first, last, db);
if (t1 != first) {
if (db.names.empty())
return first;
db.names.back().first = "noexcept (" + db.names.back().move_full() + ")";
first = t1;
}
return first;
}
template <class C>
static const char *parse_prefix_expression(const char *first, const char *last,
const std::string &op,
C &db) {
const char *t1 = parse_expression(first, last, db);
if (t1 != first) {
if (db.names.empty())
return first;
db.names.back().first = op + "(" + db.names.back().move_full() + ")";
first = t1;
}
return first;
}
template <class C>
static const char *parse_binary_expression(const char *first, const char *last,
const std::string &op,
C &db) {
const char *t1 = parse_expression(first, last, db);
if (t1 != first) {
const char *t2 = parse_expression(t1, last, db);
if (t2 != t1) {
if (db.names.size() < 2)
return first;
auto op2 = db.names.back().move_full();
db.names.pop_back();
auto op1 = db.names.back().move_full();
auto &nm = db.names.back().first;
nm.clear();
if (op == ">")
nm += '(';
nm += "(" + op1 + ") " + op + " (" + op2 + ")";
if (op == ">")
nm += ')';
first = t2;
} else if (!db.names.empty())
db.names.pop_back();
}
return first;
}
// <expression> ::= <unary operator-name> <expression>
// ::= <binary operator-name> <expression> <expression>
// ::= <ternary operator-name> <expression> <expression>
// <expression>
// ::= cl <expression>+ E # call
// ::= cv <type> <expression> #
// conversion with one argument
// ::= cv <type> _ <expression>* E #
// conversion with a different number of arguments
// ::= [gs] nw <expression>* _ <type> E # new
// (expr-list) type
// ::= [gs] nw <expression>* _ <type> <initializer> # new
// (expr-list) type (init)
// ::= [gs] na <expression>* _ <type> E # new[]
// (expr-list) type
// ::= [gs] na <expression>* _ <type> <initializer> # new[]
// (expr-list) type (init)
// ::= [gs] dl <expression> #
// delete expression
// ::= [gs] da <expression> #
// delete[] expression
// ::= pp_ <expression> #
// prefix ++
// ::= mm_ <expression> #
// prefix --
// ::= ti <type> #
// typeid (type)
// ::= te <expression> #
// typeid (expression)
// ::= dc <type> <expression> #
// dynamic_cast<type> (expression)
// ::= sc <type> <expression> #
// static_cast<type> (expression)
// ::= cc <type> <expression> #
// const_cast<type> (expression)
// ::= rc <type> <expression> #
// reinterpret_cast<type> (expression)
// ::= st <type> #
// sizeof (a type)
// ::= sz <expression> #
// sizeof (an expression)
// ::= at <type> #
// alignof (a type)
// ::= az <expression> #
// alignof (an expression)
// ::= nx <expression> #
// noexcept (expression)
// ::= <template-param>
// ::= <function-param>
// ::= dt <expression> <unresolved-name> #
// expr.name
// ::= pt <expression> <unresolved-name> #
// expr->name
// ::= ds <expression> <expression> #
// expr.*expr
// ::= sZ <template-param> # size
// of a parameter pack
// ::= sZ <function-param> # size
// of a function parameter pack
// ::= sp <expression> # pack
// expansion
// ::= tw <expression> # throw
// expression
// ::= tr # throw
// with no operand (rethrow)
// ::= <unresolved-name> # f(p),
// N::f(p), ::f(p),
// #
// freestanding
// dependent
// name
// (e.g.,
// T::x),
// #
// objectless
// nonstatic
// member
// reference
// ::= <expr-primary>
template <class C>
static const char *parse_expression(const char *first, const char *last,
C &db) {
if (last - first >= 2) {
const char *t = first;
bool parsed_gs = false;
if (last - first >= 4 && t[0] == 'g' && t[1] == 's') {
t += 2;
parsed_gs = true;
}
switch (*t) {
case 'L':
first = parse_expr_primary(first, last, db);
break;
case 'T':
first = parse_template_param(first, last, db);
break;
case 'f':
first = parse_function_param(first, last, db);
break;
case 'a':
switch (t[1]) {
case 'a':
t = parse_binary_expression(first + 2, last, "&&", db);
if (t != first + 2)
first = t;
break;
case 'd':
t = parse_prefix_expression(first + 2, last, "&", db);
if (t != first + 2)
first = t;
break;
case 'n':
t = parse_binary_expression(first + 2, last, "&", db);
if (t != first + 2)
first = t;
break;
case 'N':
t = parse_binary_expression(first + 2, last, "&=", db);
if (t != first + 2)
first = t;
break;
case 'S':
t = parse_binary_expression(first + 2, last, "=", db);
if (t != first + 2)
first = t;
break;
case 't':
first = parse_alignof_type(first, last, db);
break;
case 'z':
first = parse_alignof_expr(first, last, db);
break;
}
break;
case 'c':
switch (t[1]) {
case 'c':
first = parse_const_cast_expr(first, last, db);
break;
case 'l':
first = parse_call_expr(first, last, db);
break;
case 'm':
t = parse_binary_expression(first + 2, last, ",", db);
if (t != first + 2)
first = t;
break;
case 'o':
t = parse_prefix_expression(first + 2, last, "~", db);
if (t != first + 2)
first = t;
break;
case 'v':
first = parse_conversion_expr(first, last, db);
break;
}
break;
case 'd':
switch (t[1]) {
case 'a': {
const char *t1 = parse_expression(t + 2, last, db);
if (t1 != t + 2) {
if (db.names.empty())
return first;
db.names.back().first =
(parsed_gs ? std::string("::") : std::string()) + "delete[] " +
db.names.back().move_full();
first = t1;
}
} break;
case 'c':
first = parse_dynamic_cast_expr(first, last, db);
break;
case 'e':
t = parse_prefix_expression(first + 2, last, "*", db);
if (t != first + 2)
first = t;
break;
case 'l': {
const char *t1 = parse_expression(t + 2, last, db);
if (t1 != t + 2) {
if (db.names.empty())
return first;
db.names.back().first =
(parsed_gs ? std::string("::") : std::string()) + "delete " +
db.names.back().move_full();
first = t1;
}
} break;
case 'n':
return parse_unresolved_name(first, last, db);
case 's':
first = parse_dot_star_expr(first, last, db);
break;
case 't':
first = parse_dot_expr(first, last, db);
break;
case 'v':
t = parse_binary_expression(first + 2, last, "/", db);
if (t != first + 2)
first = t;
break;
case 'V':
t = parse_binary_expression(first + 2, last, "/=", db);
if (t != first + 2)
first = t;
break;
}
break;
case 'e':
switch (t[1]) {
case 'o':
t = parse_binary_expression(first + 2, last, "^", db);
if (t != first + 2)
first = t;
break;
case 'O':
t = parse_binary_expression(first + 2, last, "^=", db);
if (t != first + 2)
first = t;
break;
case 'q':
t = parse_binary_expression(first + 2, last, "==", db);
if (t != first + 2)
first = t;
break;
}
break;
case 'g':
switch (t[1]) {
case 'e':
t = parse_binary_expression(first + 2, last, ">=", db);
if (t != first + 2)
first = t;
break;
case 't':
t = parse_binary_expression(first + 2, last, ">", db);
if (t != first + 2)
first = t;
break;
}
break;
case 'i':
if (t[1] == 'x') {
const char *t1 = parse_expression(first + 2, last, db);
if (t1 != first + 2) {
const char *t2 = parse_expression(t1, last, db);
if (t2 != t1) {
if (db.names.size() < 2)
return first;
auto op2 = db.names.back().move_full();
db.names.pop_back();
auto op1 = db.names.back().move_full();
db.names.back() = "(" + op1 + ")[" + op2 + "]";
first = t2;
} else if (!db.names.empty())
db.names.pop_back();
}
}
break;
case 'l':
switch (t[1]) {
case 'e':
t = parse_binary_expression(first + 2, last, "<=", db);
if (t != first + 2)
first = t;
break;
case 's':
t = parse_binary_expression(first + 2, last, "<<", db);
if (t != first + 2)
first = t;
break;
case 'S':
t = parse_binary_expression(first + 2, last, "<<=", db);
if (t != first + 2)
first = t;
break;
case 't':
t = parse_binary_expression(first + 2, last, "<", db);
if (t != first + 2)
first = t;
break;
}
break;
case 'm':
switch (t[1]) {
case 'i':
t = parse_binary_expression(first + 2, last, "-", db);
if (t != first + 2)
first = t;
break;
case 'I':
t = parse_binary_expression(first + 2, last, "-=", db);
if (t != first + 2)
first = t;
break;
case 'l':
t = parse_binary_expression(first + 2, last, "*", db);
if (t != first + 2)
first = t;
break;
case 'L':
t = parse_binary_expression(first + 2, last, "*=", db);
if (t != first + 2)
first = t;
break;
case 'm':
if (first + 2 != last && first[2] == '_') {
t = parse_prefix_expression(first + 3, last, "--", db);
if (t != first + 3)
first = t;
} else {
const char *t1 = parse_expression(first + 2, last, db);
if (t1 != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "(" + db.names.back().move_full() + ")--";
first = t1;
}
}
break;
}
break;
case 'n':
switch (t[1]) {
case 'a':
case 'w':
first = parse_new_expr(first, last, db);
break;
case 'e':
t = parse_binary_expression(first + 2, last, "!=", db);
if (t != first + 2)
first = t;
break;
case 'g':
t = parse_prefix_expression(first + 2, last, "-", db);
if (t != first + 2)
first = t;
break;
case 't':
t = parse_prefix_expression(first + 2, last, "!", db);
if (t != first + 2)
first = t;
break;
case 'x':
t = parse_noexcept_expression(first + 2, last, db);
if (t != first + 2)
first = t;
break;
}
break;
case 'o':
switch (t[1]) {
case 'n':
return parse_unresolved_name(first, last, db);
case 'o':
t = parse_binary_expression(first + 2, last, "||", db);
if (t != first + 2)
first = t;
break;
case 'r':
t = parse_binary_expression(first + 2, last, "|", db);
if (t != first + 2)
first = t;
break;
case 'R':
t = parse_binary_expression(first + 2, last, "|=", db);
if (t != first + 2)
first = t;
break;
}
break;
case 'p':
switch (t[1]) {
case 'm':
t = parse_binary_expression(first + 2, last, "->*", db);
if (t != first + 2)
first = t;
break;
case 'l':
t = parse_binary_expression(first + 2, last, "+", db);
if (t != first + 2)
first = t;
break;
case 'L':
t = parse_binary_expression(first + 2, last, "+=", db);
if (t != first + 2)
first = t;
break;
case 'p':
if (first + 2 != last && first[2] == '_') {
t = parse_prefix_expression(first + 3, last, "++", db);
if (t != first + 3)
first = t;
} else {
const char *t1 = parse_expression(first + 2, last, db);
if (t1 != first + 2) {
if (db.names.empty())
return first;
db.names.back() = "(" + db.names.back().move_full() + ")++";
first = t1;
}
}
break;
case 's':
t = parse_prefix_expression(first + 2, last, "+", db);
if (t != first + 2)
first = t;
break;
case 't':
first = parse_arrow_expr(first, last, db);
break;
}
break;
case 'q':
if (t[1] == 'u') {
const char *t1 = parse_expression(first + 2, last, db);
if (t1 != first + 2) {
const char *t2 = parse_expression(t1, last, db);
if (t2 != t1) {
const char *t3 = parse_expression(t2, last, db);
if (t3 != t2) {
if (db.names.size() < 3)
return first;
auto op3 = db.names.back().move_full();
db.names.pop_back();
auto op2 = db.names.back().move_full();
db.names.pop_back();
auto op1 = db.names.back().move_full();
db.names.back() = "(" + op1 + ") ? (" + op2 + ") : (" + op3 + ")";
first = t3;
} else {
if (db.names.size() < 2)
return first;
db.names.pop_back();
db.names.pop_back();
}
} else if (!db.names.empty())
db.names.pop_back();
}
}
break;
case 'r':
switch (t[1]) {
case 'c':
first = parse_reinterpret_cast_expr(first, last, db);
break;
case 'm':
t = parse_binary_expression(first + 2, last, "%", db);
if (t != first + 2)
first = t;
break;
case 'M':
t = parse_binary_expression(first + 2, last, "%=", db);
if (t != first + 2)
first = t;
break;
case 's':
t = parse_binary_expression(first + 2, last, ">>", db);
if (t != first + 2)
first = t;
break;
case 'S':
t = parse_binary_expression(first + 2, last, ">>=", db);
if (t != first + 2)
first = t;
break;
}
break;
case 's':
switch (t[1]) {
case 'c':
first = parse_static_cast_expr(first, last, db);
break;
case 'p':
first = parse_pack_expansion(first, last, db);
break;
case 'r':
return parse_unresolved_name(first, last, db);
case 't':
first = parse_sizeof_type_expr(first, last, db);
break;
case 'z':
first = parse_sizeof_expr_expr(first, last, db);
break;
case 'Z':
if (last - t >= 3) {
switch (t[2]) {
case 'T':
first = parse_sizeof_param_pack_expr(first, last, db);
break;
case 'f':
first = parse_sizeof_function_param_pack_expr(first, last, db);
break;
}
}
break;
}
break;
case 't':
switch (t[1]) {
case 'e':
case 'i':
first = parse_typeid_expr(first, last, db);
break;
case 'r':
db.names.push_back("throw");
first += 2;
break;
case 'w':
first = parse_throw_expr(first, last, db);
break;
}
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return parse_unresolved_name(first, last, db);
}
}
return first;
}
// <template-arg> ::= <type> # type
// or template
// ::= X <expression> E #
// expression
// ::= <expr-primary> #
// simple expressions
// ::= J <template-arg>* E #
// argument pack
// ::= LZ <encoding> E #
// extension
template <class C>
static const char *parse_template_arg(const char *first, const char *last,
C &db) {
if (first != last) {
const char *t;
switch (*first) {
case 'X':
t = parse_expression(first + 1, last, db);
if (t != first + 1) {
if (t != last && *t == 'E')
first = t + 1;
}
break;
case 'J':
t = first + 1;
if (t == last)
return first;
while (*t != 'E') {
const char *t1 = parse_template_arg(t, last, db);
if (t1 == t)
return first;
t = t1;
}
first = t + 1;
break;
case 'L':
// <expr-primary> or LZ <encoding> E
if (first + 1 != last && first[1] == 'Z') {
t = parse_encoding(first + 2, last, db);
if (t != first + 2 && t != last && *t == 'E')
first = t + 1;
} else
first = parse_expr_primary(first, last, db);
break;
default:
// <type>
first = parse_type(first, last, db);
break;
}
}
return first;
}
// <template-args> ::= I <template-arg>* E
// extension, the abi says <template-arg>+
template <class C>
static const char *parse_template_args(const char *first, const char *last,
C &db) {
if (last - first >= 2 && *first == 'I') {
if (db.tag_templates)
db.template_param.back().clear();
const char *t = first + 1;
std::string args("<");
while (*t != 'E') {
if (db.tag_templates)
db.template_param.emplace_back();
size_t k0 = db.names.size();
const char *t1 = parse_template_arg(t, last, db);
size_t k1 = db.names.size();
if (db.tag_templates)
db.template_param.pop_back();
if (t1 == t || t1 == last)
return first;
if (db.tag_templates) {
db.template_param.back().emplace_back();
for (size_t k = k0; k < k1; ++k)
db.template_param.back().back().push_back(db.names[k]);
}
for (size_t k = k0; k < k1; ++k) {
if (args.size() > 1)
args += ", ";
args += db.names[k].move_full();
}
for (; k1 > k0; --k1)
if (!db.names.empty())
db.names.pop_back();
t = t1;
}
first = t + 1;
if (args.back() != '>')
args += ">";
else
args += " >";
db.names.push_back(std::move(args));
}
return first;
}
// <nested-name> ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix>
// <unqualified-name> E
// ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
// <template-args> E
//
// <prefix> ::= <prefix> <unqualified-name>
// ::= <template-prefix> <template-args>
// ::= <template-param>
// ::= <decltype>
// ::= # empty
// ::= <substitution>
// ::= <prefix> <data-member-prefix>
// extension ::= L
//
// <template-prefix> ::= <prefix> <template unqualified-name>
// ::= <template-param>
// ::= <substitution>
template <class C>
static const char *parse_nested_name(const char *first, const char *last, C &db,
bool *ends_with_template_args) {
if (first != last && *first == 'N') {
unsigned cv;
const char *t0 = parse_cv_qualifiers(first + 1, last, cv);
if (t0 == last)
return first;
db.ref = 0;
if (*t0 == 'R') {
db.ref = 1;
++t0;
} else if (*t0 == 'O') {
db.ref = 2;
++t0;
}
db.names.emplace_back();
if (last - t0 >= 2 && t0[0] == 'S' && t0[1] == 't') {
t0 += 2;
db.names.back().first = "std";
}
if (t0 == last) {
db.names.pop_back();
return first;
}
bool pop_subs = false;
bool component_ends_with_template_args = false;
while (*t0 != 'E') {
component_ends_with_template_args = false;
const char *t1;
switch (*t0) {
case 'S':
if (t0 + 1 != last && t0[1] == 't')
goto do_parse_unqualified_name;
t1 = parse_substitution(t0, last, db);
if (t1 != t0 && t1 != last) {
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
if (!db.names.back().first.empty()) {
db.names.back().first += "::" + name;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
} else
db.names.back().first = name;
pop_subs = true;
t0 = t1;
} else
return first;
break;
case 'T':
t1 = parse_template_param(t0, last, db);
if (t1 != t0 && t1 != last) {
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
if (!db.names.back().first.empty())
db.names.back().first += "::" + name;
else
db.names.back().first = name;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
pop_subs = true;
t0 = t1;
} else
return first;
break;
case 'D':
if (t0 + 1 != last && t0[1] != 't' && t0[1] != 'T')
goto do_parse_unqualified_name;
t1 = parse_decltype(t0, last, db);
if (t1 != t0 && t1 != last) {
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
if (!db.names.back().first.empty())
db.names.back().first += "::" + name;
else
db.names.back().first = name;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
pop_subs = true;
t0 = t1;
} else
return first;
break;
case 'I':
t1 = parse_template_args(t0, last, db);
if (t1 != t0 && t1 != last) {
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first += name;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
t0 = t1;
component_ends_with_template_args = true;
} else
return first;
break;
case 'L':
if (++t0 == last)
return first;
break;
default:
do_parse_unqualified_name:
t1 = parse_unqualified_name(t0, last, db);
if (t1 != t0 && t1 != last) {
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
if (!db.names.back().first.empty())
db.names.back().first += "::" + name;
else
db.names.back().first = name;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
pop_subs = true;
t0 = t1;
} else
return first;
}
}
first = t0 + 1;
db.cv = cv;
if (pop_subs && !db.subs.empty())
db.subs.pop_back();
if (ends_with_template_args)
*ends_with_template_args = component_ends_with_template_args;
}
return first;
}
// <discriminator> := _ <non-negative number> # when number < 10
// := __ <non-negative number> _ # when number >= 10
// extension := decimal-digit+ # at the end of string
static const char *parse_discriminator(const char *first, const char *last) {
// parse but ignore discriminator
if (first != last) {
if (*first == '_') {
const char *t1 = first + 1;
if (t1 != last) {
if (std::isdigit(*t1))
first = t1 + 1;
else if (*t1 == '_') {
for (++t1; t1 != last && std::isdigit(*t1); ++t1)
;
if (t1 != last && *t1 == '_')
first = t1 + 1;
}
}
} else if (std::isdigit(*first)) {
const char *t1 = first + 1;
for (; t1 != last && std::isdigit(*t1); ++t1)
;
if (t1 == last)
first = last;
}
}
return first;
}
// <local-name> := Z <function encoding> E <entity name> [<discriminator>]
// := Z <function encoding> E s [<discriminator>]
// := Z <function encoding> Ed [ <parameter number> ] _ <entity
// name>
template <class C>
static const char *parse_local_name(const char *first, const char *last, C &db,
bool *ends_with_template_args) {
if (first != last && *first == 'Z') {
const char *t = parse_encoding(first + 1, last, db);
if (t != first + 1 && t != last && *t == 'E' && ++t != last) {
switch (*t) {
case 's':
first = parse_discriminator(t + 1, last);
if (db.names.empty())
return first;
db.names.back().first.append("::string literal");
break;
case 'd':
if (++t != last) {
const char *t1 = parse_number(t, last);
if (t1 != last && *t1 == '_') {
t = t1 + 1;
t1 = parse_name(t, last, db, ends_with_template_args);
if (t1 != t) {
if (db.names.size() < 2)
return first;
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first.append("::");
db.names.back().first.append(name);
first = t1;
} else if (!db.names.empty())
db.names.pop_back();
}
}
break;
default: {
const char *t1 = parse_name(t, last, db, ends_with_template_args);
if (t1 != t) {
// parse but ignore discriminator
first = parse_discriminator(t1, last);
if (db.names.size() < 2)
return first;
auto name = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first.append("::");
db.names.back().first.append(name);
} else if (!db.names.empty())
db.names.pop_back();
} break;
}
}
}
return first;
}
// <name> ::= <nested-name> // N
// ::= <local-name> # See Scope Encoding below // Z
// ::= <unscoped-template-name> <template-args>
// ::= <unscoped-name>
// <unscoped-template-name> ::= <unscoped-name>
// ::= <substitution>
template <class C>
static const char *parse_name(const char *first, const char *last, C &db,
bool *ends_with_template_args) {
if (last - first >= 2) {
const char *t0 = first;
// extension: ignore L here
if (*t0 == 'L')
++t0;
switch (*t0) {
case 'N': {
const char *t1 = parse_nested_name(t0, last, db, ends_with_template_args);
if (t1 != t0)
first = t1;
break;
}
case 'Z': {
const char *t1 = parse_local_name(t0, last, db, ends_with_template_args);
if (t1 != t0)
first = t1;
break;
}
default: {
const char *t1 = parse_unscoped_name(t0, last, db);
if (t1 != t0) {
if (t1 != last &&
*t1 == 'I') // <unscoped-template-name> <template-args>
{
if (db.names.empty())
return first;
db.subs.push_back(typename C::sub_type(1, db.names.back()));
t0 = t1;
t1 = parse_template_args(t0, last, db);
if (t1 != t0) {
if (db.names.size() < 2)
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first += tmp;
first = t1;
if (ends_with_template_args)
*ends_with_template_args = true;
}
} else // <unscoped-name>
first = t1;
} else { // try <substitution> <template-args>
t1 = parse_substitution(t0, last, db);
if (t1 != t0 && t1 != last && *t1 == 'I') {
t0 = t1;
t1 = parse_template_args(t0, last, db);
if (t1 != t0) {
if (db.names.size() < 2)
return first;
auto tmp = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first += tmp;
first = t1;
if (ends_with_template_args)
*ends_with_template_args = true;
}
}
}
break;
}
}
}
return first;
}
// <call-offset> ::= h <nv-offset> _
// ::= v <v-offset> _
//
// <nv-offset> ::= <offset number>
// # non-virtual base override
//
// <v-offset> ::= <offset number> _ <virtual offset number>
// # virtual base override, with vcall offset
static const char *parse_call_offset(const char *first, const char *last) {
if (first != last) {
switch (*first) {
case 'h': {
const char *t = parse_number(first + 1, last);
if (t != first + 1 && t != last && *t == '_')
first = t + 1;
} break;
case 'v': {
const char *t = parse_number(first + 1, last);
if (t != first + 1 && t != last && *t == '_') {
const char *t2 = parse_number(++t, last);
if (t2 != t && t2 != last && *t2 == '_')
first = t2 + 1;
}
} break;
}
}
return first;
}
// <special-name> ::= TV <type> # virtual table
// ::= TT <type> # VTT structure (construction vtable index)
// ::= TI <type> # typeinfo structure
// ::= TS <type> # typeinfo name (null-terminated byte string)
// ::= Tc <call-offset> <call-offset> <base encoding>
// # base is the nominal target function of thunk
// # first call-offset is 'this' adjustment
// # second call-offset is result adjustment
// ::= T <call-offset> <base encoding>
// # base is the nominal target function of thunk
// ::= GV <object name> # Guard variable for one-time
// initialization
// # No <type>
// extension ::= TC <first type> <number> _ <second type> # construction
// vtable for second-in-first
// extension ::= GR <object name> # reference temporary for object
template <class C>
static const char *parse_special_name(const char *first, const char *last,
C &db) {
if (last - first > 2) {
const char *t;
switch (*first) {
case 'T':
switch (first[1]) {
case 'V':
// TV <type> # virtual table
t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "vtable for ");
first = t;
}
break;
case 'T':
// TT <type> # VTT structure (construction vtable index)
t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "VTT for ");
first = t;
}
break;
case 'I':
// TI <type> # typeinfo structure
t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "typeinfo for ");
first = t;
}
break;
case 'S':
// TS <type> # typeinfo name (null-terminated byte string)
t = parse_type(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "typeinfo name for ");
first = t;
}
break;
case 'c':
// Tc <call-offset> <call-offset> <base encoding>
{
const char *t0 = parse_call_offset(first + 2, last);
if (t0 == first + 2)
break;
const char *t1 = parse_call_offset(t0, last);
if (t1 == t0)
break;
t = parse_encoding(t1, last, db);
if (t != t1) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "covariant return thunk to ");
first = t;
}
}
break;
case 'C':
// extension ::= TC <first type> <number> _ <second type> # construction
// vtable for second-in-first
t = parse_type(first + 2, last, db);
if (t != first + 2) {
const char *t0 = parse_number(t, last);
if (t0 != t && t0 != last && *t0 == '_') {
const char *t1 = parse_type(++t0, last, db);
if (t1 != t0) {
if (db.names.size() < 2)
return first;
auto left = db.names.back().move_full();
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first = "construction vtable for " +
std::move(left) + "-in-" +
db.names.back().move_full();
first = t1;
}
}
}
break;
default:
// T <call-offset> <base encoding>
{
const char *t0 = parse_call_offset(first + 1, last);
if (t0 == first + 1)
break;
t = parse_encoding(t0, last, db);
if (t != t0) {
if (db.names.empty())
return first;
if (first[1] == 'v') {
db.names.back().first.insert(0, "virtual thunk to ");
first = t;
} else {
db.names.back().first.insert(0, "non-virtual thunk to ");
first = t;
}
}
}
break;
}
break;
case 'G':
switch (first[1]) {
case 'V':
// GV <object name> # Guard variable for one-time initialization
t = parse_name(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "guard variable for ");
first = t;
}
break;
case 'R':
// extension ::= GR <object name> # reference temporary for object
t = parse_name(first + 2, last, db);
if (t != first + 2) {
if (db.names.empty())
return first;
db.names.back().first.insert(0, "reference temporary for ");
first = t;
}
break;
}
break;
}
}
return first;
}
namespace {
template <class T> class save_value {
T &restore_;
T original_value_;
public:
save_value(T &restore) : restore_(restore), original_value_(restore) {}
~save_value() { restore_ = std::move(original_value_); }
save_value(const save_value &) = delete;
save_value &operator=(const save_value &) = delete;
};
}
// <encoding> ::= <function name> <bare-function-type>
// ::= <data name>
// ::= <special-name>
template <class C>
static const char *parse_encoding(const char *first, const char *last, C &db) {
if (first != last) {
save_value<decltype(db.encoding_depth)> su(db.encoding_depth);
++db.encoding_depth;
save_value<decltype(db.tag_templates)> sb(db.tag_templates);
if (db.encoding_depth > 1)
db.tag_templates = true;
switch (*first) {
case 'G':
case 'T':
first = parse_special_name(first, last, db);
break;
default: {
bool ends_with_template_args = false;
const char *t = parse_name(first, last, db, &ends_with_template_args);
unsigned cv = db.cv;
unsigned ref = db.ref;
if (t != first) {
if (t != last && *t != 'E' && *t != '.') {
save_value<bool> sb2(db.tag_templates);
db.tag_templates = false;
const char *t2;
std::string ret2;
if (db.names.empty())
return first;
const std::string &nm = db.names.back().first;
if (nm.empty())
return first;
if (!db.parsed_ctor_dtor_cv && ends_with_template_args) {
t2 = parse_type(t, last, db);
if (t2 == t)
return first;
if (db.names.size() < 2)
return first;
auto ret1 = std::move(db.names.back().first);
ret2 = std::move(db.names.back().second);
if (ret2.empty())
ret1 += ' ';
db.names.pop_back();
if (db.names.empty())
return first;
db.names.back().first.insert(0, ret1);
t = t2;
}
db.names.back().first += '(';
if (t != last && *t == 'v') {
++t;
} else {
bool first_arg = true;
while (true) {
size_t k0 = db.names.size();
t2 = parse_type(t, last, db);
size_t k1 = db.names.size();
if (t2 == t)
break;
if (k1 > k0) {
std::string tmp;
for (size_t k = k0; k < k1; ++k) {
if (!tmp.empty())
tmp += ", ";
tmp += db.names[k].move_full();
}
for (size_t k = k0; k < k1; ++k) {
if (db.names.empty())
return first;
db.names.pop_back();
}
if (!tmp.empty()) {
if (db.names.empty())
return first;
if (!first_arg)
db.names.back().first += ", ";
else
first_arg = false;
db.names.back().first += tmp;
}
}
t = t2;
}
}
if (db.names.empty())
return first;
db.names.back().first += ')';
if (cv & 1)
db.names.back().first.append(" const");
if (cv & 2)
db.names.back().first.append(" volatile");
if (cv & 4)
db.names.back().first.append(" restrict");
if (ref == 1)
db.names.back().first.append(" &");
else if (ref == 2)
db.names.back().first.append(" &&");
db.names.back().first += ret2;
first = t;
} else
first = t;
}
break;
}
}
}
return first;
}
// _block_invoke
// _block_invoke<decimal-digit>+
// _block_invoke_<decimal-digit>+
template <class C>
static const char *parse_block_invoke(const char *first, const char *last,
C &db) {
if (last - first >= 13) {
const char test[] = "_block_invoke";
const char *t = first;
for (int i = 0; i < 13; ++i, ++t) {
if (*t != test[i])
return first;
}
if (t != last) {
if (*t == '_') {
// must have at least 1 decimal digit
if (++t == last || !std::isdigit(*t))
return first;
++t;
}
// parse zero or more digits
while (t != last && isdigit(*t))
++t;
}
if (db.names.empty())
return first;
db.names.back().first.insert(0, "invocation function for block in ");
first = t;
}
return first;
}
// extension
// <dot-suffix> := .<anything and everything>
template <class C>
static const char *parse_dot_suffix(const char *first, const char *last,
C &db) {
if (first != last && *first == '.') {
if (db.names.empty())
return first;
db.names.back().first += " (" + std::string(first, last) + ")";
first = last;
}
return first;
}
// <block-involcaton-function> ___Z<encoding>_block_invoke
// <block-involcaton-function> ___Z<encoding>_block_invoke<decimal-digit>+
// <block-involcaton-function> ___Z<encoding>_block_invoke_<decimal-digit>+
// <mangled-name> ::= _Z<encoding>
// ::= <type>
template <class C>
static void demangle(const char *first, const char *last, C &db, int &status) {
if (first >= last) {
status = invalid_mangled_name;
return;
}
if (*first == '_') {
if (last - first >= 4) {
if (first[1] == 'Z') {
const char *t = parse_encoding(first + 2, last, db);
if (t != first + 2 && t != last && *t == '.')
t = parse_dot_suffix(t, last, db);
if (t != last)
status = invalid_mangled_name;
} else if (first[1] == '_' && first[2] == '_' && first[3] == 'Z') {
const char *t = parse_encoding(first + 4, last, db);
if (t != first + 4 && t != last) {
const char *t1 = parse_block_invoke(t, last, db);
if (t1 != last)
status = invalid_mangled_name;
} else
status = invalid_mangled_name;
} else
status = invalid_mangled_name;
} else
status = invalid_mangled_name;
} else {
const char *t = parse_type(first, last, db);
if (t != last)
status = invalid_mangled_name;
}
if (status == success && db.names.empty())
status = invalid_mangled_name;
}
namespace {
template <class StrT> struct string_pair {
StrT first;
StrT second;
string_pair() = default;
string_pair(StrT f) : first(std::move(f)) {}
string_pair(StrT f, StrT s) : first(std::move(f)), second(std::move(s)) {}
template <size_t N> string_pair(const char (&s)[N]) : first(s, N - 1) {}
size_t size() const { return first.size() + second.size(); }
StrT full() const { return first + second; }
StrT move_full() { return std::move(first) + std::move(second); }
};
struct Db {
typedef std::vector<string_pair<std::string>> sub_type;
typedef std::vector<sub_type> template_param_type;
sub_type names;
template_param_type subs;
std::vector<template_param_type> template_param;
unsigned cv = 0;
unsigned ref = 0;
unsigned encoding_depth = 0;
bool parsed_ctor_dtor_cv = false;
bool tag_templates = true;
bool fix_forward_references = false;
bool try_to_parse_template_args = true;
Db() : subs(0, names), template_param(0, subs) {}
};
}
char *llvm::itaniumDemangle(const char *mangled_name, char *buf, size_t *n,
int *status) {
if (mangled_name == nullptr || (buf != nullptr && n == nullptr)) {
if (status)
*status = invalid_args;
return nullptr;
}
size_t len = std::strlen(mangled_name);
if (len < 2 || strncmp(mangled_name, "_Z", 2)) {
if (len < 4 || strncmp(mangled_name, "___Z", 4)) {
if (status)
*status = invalid_mangled_name;
return nullptr;
}
}
size_t internal_size = buf != nullptr ? *n : 0;
Db db;
db.template_param.emplace_back();
int internal_status = success;
demangle(mangled_name, mangled_name + len, db, internal_status);
if (internal_status == success && db.fix_forward_references &&
!db.template_param.empty() && !db.template_param.front().empty()) {
db.fix_forward_references = false;
db.tag_templates = false;
db.names.clear();
db.subs.clear();
demangle(mangled_name, mangled_name + len, db, internal_status);
if (db.fix_forward_references)
internal_status = invalid_mangled_name;
}
if (internal_status == success) {
size_t sz = db.names.back().size() + 1;
if (sz > internal_size) {
char *newbuf = static_cast<char *>(std::realloc(buf, sz));
if (newbuf == nullptr) {
internal_status = memory_alloc_failure;
buf = nullptr;
} else {
buf = newbuf;
if (n != nullptr)
*n = sz;
}
}
if (buf != nullptr) {
db.names.back().first += db.names.back().second;
std::memcpy(buf, db.names.back().first.data(), sz - 1);
buf[sz - 1] = char(0);
}
} else
buf = nullptr;
if (status)
*status = internal_status;
return buf;
}