typeinfo: style adjustments for adding MS ABI RTTI
This is motivated by adding a third RTTI scheme to libc++. Split out
the two forms of the itanium RTTI representation. This is based on
suggestions from Eric Fiselier. NFC
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291174 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/typeinfo b/include/typeinfo
index 9b14cb3..9b21da6 100644
--- a/include/typeinfo
+++ b/include/typeinfo
@@ -69,6 +69,12 @@
#pragma GCC system_header
#endif
+#if defined(_LIBCPP_NONUNIQUE_RTTI_BIT)
+#define _LIBCPP_HAS_NONUNIQUE_TYPEINFO
+#else
+#define _LIBCPP_HAS_UNIQUE_TYPEINFO
+#endif
+
namespace std // purposefully not using versioning namespace
{
@@ -77,76 +83,89 @@
type_info& operator=(const type_info&);
type_info(const type_info&);
-protected:
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- const char* __type_name;
-#else
- // A const char* with the non-unique RTTI bit possibly set.
- uintptr_t __type_name;
+#if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
+ _LIBCPP_INLINE_VISIBILITY
+ int __compare_nonunique_names(const type_info &__arg) const _NOEXCEPT
+ { return __builtin_strcmp(name(), __arg.name()); }
#endif
+protected:
+#if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
+ // A const char* with the non-unique RTTI bit possibly set.
+ uintptr_t __type_name;
+
_LIBCPP_INLINE_VISIBILITY
- explicit type_info(const char* __n)
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- : __type_name(__n) {}
+ type_info(const char* __n) : __type_name(reinterpret_cast<uintptr_t>(__n)) {}
#else
- : __type_name(reinterpret_cast<uintptr_t>(__n)) {}
+ const char *__type_name;
+
+ _LIBCPP_INLINE_VISIBILITY
+ type_info(const char* __n) : __type_name(__n) {}
#endif
public:
virtual ~type_info();
+#if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
_LIBCPP_INLINE_VISIBILITY
const char* name() const _NOEXCEPT
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- {return __type_name;}
-#else
- {return reinterpret_cast<const char*>(__type_name & ~_LIBCPP_NONUNIQUE_RTTI_BIT);}
-#endif
+ {
+ return reinterpret_cast<const char*>(__type_name &
+ ~_LIBCPP_NONUNIQUE_RTTI_BIT);
+ }
_LIBCPP_INLINE_VISIBILITY
bool before(const type_info& __arg) const _NOEXCEPT
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- {return __type_name < __arg.__type_name;}
-#else
- {if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
- return __type_name < __arg.__type_name;
- return __compare_nonunique_names(__arg) < 0;}
-#endif
+ {
+ if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
+ return __type_name < __arg.__type_name;
+ return __compare_nonunique_names(__arg) < 0;
+ }
_LIBCPP_INLINE_VISIBILITY
size_t hash_code() const _NOEXCEPT
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- {return reinterpret_cast<size_t>(__type_name);}
-#else
- {if (!(__type_name & _LIBCPP_NONUNIQUE_RTTI_BIT)) return __type_name;
- const char *__ptr = name();
- size_t __hash = 5381;
- while (unsigned char __c = static_cast<unsigned char>(*__ptr++))
- __hash = (__hash * 33) ^ __c;
- return __hash;}
-#endif
+ {
+ if (!(__type_name & _LIBCPP_NONUNIQUE_RTTI_BIT))
+ return __type_name;
+
+ const char* __ptr = name();
+ size_t __hash = 5381;
+ while (unsigned char __c = static_cast<unsigned char>(*__ptr++))
+ __hash = (__hash * 33) ^ __c;
+ return __hash;
+ }
_LIBCPP_INLINE_VISIBILITY
bool operator==(const type_info& __arg) const _NOEXCEPT
-#ifndef _LIBCPP_NONUNIQUE_RTTI_BIT
- {return __type_name == __arg.__type_name;}
+ {
+ if (__type_name == __arg.__type_name)
+ return true;
+
+ if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
+ return false;
+ return __compare_nonunique_names(__arg) == 0;
+ }
#else
- {if (__type_name == __arg.__type_name) return true;
- if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
- return false;
- return __compare_nonunique_names(__arg) == 0;}
+ _LIBCPP_INLINE_VISIBILITY
+ const char* name() const _NOEXCEPT
+ { return __type_name; }
+
+ _LIBCPP_INLINE_VISIBILITY
+ bool before(const type_info& __arg) const _NOEXCEPT
+ { return __type_name < __arg.__type_name; }
+
+ _LIBCPP_INLINE_VISIBILITY
+ size_t hash_code() const _NOEXCEPT
+ { return reinterpret_cast<size_t>(__type_name); }
+
+ _LIBCPP_INLINE_VISIBILITY
+ bool operator==(const type_info& __arg) const _NOEXCEPT
+ { return __type_name == __arg.__type_name; }
#endif
+
_LIBCPP_INLINE_VISIBILITY
bool operator!=(const type_info& __arg) const _NOEXCEPT
- {return !operator==(__arg);}
-
-#ifdef _LIBCPP_NONUNIQUE_RTTI_BIT
- private:
- _LIBCPP_INLINE_VISIBILITY
- int __compare_nonunique_names(const type_info &__arg) const _NOEXCEPT
- {return __builtin_strcmp(name(), __arg.name());}
-#endif
+ { return !operator==(__arg); }
};
class _LIBCPP_EXCEPTION_ABI bad_cast
