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llvm / libcxxabi / refs/heads/release_39 / . / src / cxa_demangle.cpp
blob: 25aa741299a28003d316d0b66477ac0b3bad6e80 [file] [log] [blame]
//===-------------------------- cxa_demangle.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.
//
//===----------------------------------------------------------------------===//
#define _LIBCPP_EXTERN_TEMPLATE(...)
#define _LIBCPP_NO_EXCEPTIONS
#include "__cxxabi_config.h"
#include <vector>
#include <algorithm>
#include <string>
#include <numeric>
#include <cstdlib>
#include <cstring>
#include <cctype>
#ifdef _MSC_VER
// snprintf is implemented in VS 2015
#if _MSC_VER < 1900
#define snprintf _snprintf_s
#endif
#endif
namespace __cxxabiv1
{
namespace
{
enum
{
unknown_error = -4,
invalid_args = -3,
invalid_mangled_name,
memory_alloc_failure,
success
};
template <class C>
const char* parse_type(const char* first, const char* last, C& db);
template <class C>
const char* parse_encoding(const char* first, const char* last, C& db);
template <class C>
const char* parse_name(const char* first, const char* last, C& db,
bool* ends_with_template_args = 0);
template <class C>
const char* parse_expression(const char* first, const char* last, C& db);
template <class C>
const char* parse_template_args(const char* first, const char* last, C& db);
template <class C>
const char* parse_operator_name(const char* first, const char* last, C& db);
template <class C>
const char* parse_unqualified_name(const char* first, const char* last, C& db);
template <class C>
const char* parse_decltype(const char* first, const char* last, C& db);
template <class C>
void
print_stack(const C& db)
{
fprintf(stderr, "---------\n");
fprintf(stderr, "names:\n");
for (auto& s : db.names)
fprintf(stderr, "{%s#%s}\n", s.first.c_str(), s.second.c_str());
int i = -1;
fprintf(stderr, "subs:\n");
for (auto& v : db.subs)
{
if (i >= 0)
fprintf(stderr, "S%i_ = {", i);
else
fprintf(stderr, "S_ = {");
for (auto& s : v)
fprintf(stderr, "{%s#%s}", s.first.c_str(), s.second.c_str());
fprintf(stderr, "}\n");
++i;
}
fprintf(stderr, "template_param:\n");
for (auto& t : db.template_param)
{
fprintf(stderr, "--\n");
i = -1;
for (auto& v : t)
{
if (i >= 0)
fprintf(stderr, "T%i_ = {", i);
else
fprintf(stderr, "T_ = {");
for (auto& s : v)
fprintf(stderr, "{%s#%s}", s.first.c_str(), s.second.c_str());
fprintf(stderr, "}\n");
++i;
}
}
fprintf(stderr, "---------\n\n");
}
template <class C>
void
print_state(const char* msg, const char* first, const char* last, const C& db)
{
fprintf(stderr, "%s: ", msg);
for (; first != last; ++first)
fprintf(stderr, "%c", *first);
fprintf(stderr, "\n");
print_stack(db);
}
// <number> ::= [n] <non-negative decimal integer>
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;
}
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 constexpr const char* spec = "%af";
};
constexpr const char* float_data<float>::spec;
template <>
struct float_data<double>
{
static const size_t mangled_size = 16;
static const size_t max_demangled_size = 32;
static constexpr const char* spec = "%a";
};
constexpr const char* float_data<double>::spec;
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 constexpr const char* spec = "%LaL";
};
constexpr const char* float_data<long double>::spec;
template <class Float, class C>
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(typename C::String(num, static_cast<std::size_t>(n)));
first = t+1;
}
}
return first;
}
// <source-name> ::= <positive length number> <identifier>
template <class C>
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)
{
typename C::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>
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>
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]
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>
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(typename C::String(first, t+1));
first = t+1;
db.fix_forward_references = true;
}
}
}
}
return first;
}
// cc <type> <expression> # const_cast<type> (expression)
template <class C>
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>
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>
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>
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>
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>
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>
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>
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)
{
typename C::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>
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" + typename C::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" + typename C::String(t, t1));
first = t1+1;
}
}
}
}
return first;
}
// sZ <function-param> # size of a function parameter pack
template <class C>
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>
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>
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>
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>
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>
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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>
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>
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>
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>
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>
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>
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 = typename C::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>
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;
typename C::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();
typename C::String expr_list;
if (has_expr_list)
{
if (db.names.empty())
return first;
expr_list = db.names.back().move_full();
db.names.pop_back();
}
typename C::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>
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>
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>
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;
typename C::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>
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>
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, " [" + typename C::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>
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>
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[" + typename C::String(num, sz) + "]";
first = t1;
}
}
else
{
++t;
db.names.push_back("pixel vector[" + typename C::String(num, sz) + "]");
first = t;
}
}
}
else
{
typename C::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>
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(db.names.get_allocator());
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(), db.names.get_allocator()));
}
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(), db.names.get_allocator()));
}
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(), db.names.get_allocator()));
}
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(), db.names.get_allocator()));
}
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(), db.names.get_allocator()));
}
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(db.names.get_allocator());
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(db.names.get_allocator());
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(db.names.get_allocator());
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(db.names.get_allocator());
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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(db.names.get_allocator());
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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(), db.names.get_allocator()));
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>
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>
const char*
parse_integer_literal(const char* first, const char* last, const typename C::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>
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;