#ifndef LLVM_SUPPORT_CASTING_H
#define LLVM_SUPPORT_CASTING_H
#include <cassert>
namespace llvm {
template<typename FromCl> struct isa_impl_cl;
template<typename From> struct simplify_type {
typedef From SimpleType;
static SimpleType &getSimplifiedValue(From &Val) { return Val; }
};
template<typename From> struct simplify_type<const From> {
typedef const From SimpleType;
static SimpleType &getSimplifiedValue(const From &Val) {
return simplify_type<From>::getSimplifiedValue(static_cast<From&>(Val));
}
};
template <typename To, typename From>
inline bool isa_impl(const From &Val) {
return To::classof(&Val);
}
template<typename To, typename From, typename SimpleType>
struct isa_impl_wrap {
static bool doit(const From &Val) {
return isa_impl_cl<const SimpleType>::template
isa<To>(simplify_type<const From>::getSimplifiedValue(Val));
}
};
template<typename To, typename FromTy>
struct isa_impl_wrap<To, const FromTy, const FromTy> {
static bool doit(const FromTy &Val) {
return isa_impl<To,FromTy>(Val);
}
};
template<typename FromCl>
struct isa_impl_cl {
template<class ToCl>
static bool isa(const FromCl &Val) {
return isa_impl_wrap<ToCl,const FromCl,
typename simplify_type<const FromCl>::SimpleType>::doit(Val);
}
};
template<typename FromCl>
struct isa_impl_cl<const FromCl> {
template<class ToCl>
static bool isa(const FromCl &Val) {
return isa_impl_cl<FromCl>::template isa<ToCl>(Val);
}
};
template<class FromCl>
struct isa_impl_cl<FromCl*> {
template<class ToCl>
static bool isa(FromCl *Val) {
return isa_impl_cl<FromCl>::template isa<ToCl>(*Val);
}
};
template<class FromCl>
struct isa_impl_cl<FromCl&> {
template<class ToCl>
static bool isa(FromCl &Val) {
return isa_impl_cl<FromCl>::template isa<ToCl>(&Val);
}
};
template <class X, class Y>
inline bool isa(const Y &Val) {
return isa_impl_cl<Y>::template isa<X>(Val);
}
template<class To, class From> struct cast_retty;
template<class To, class From> struct cast_retty_impl {
typedef To& ret_type; };
template<class To, class From> struct cast_retty_impl<To, const From> {
typedef const To &ret_type; };
template<class To, class From> struct cast_retty_impl<To, From*> {
typedef To* ret_type; };
template<class To, class From> struct cast_retty_impl<To, const From*> {
typedef const To* ret_type; };
template<class To, class From> struct cast_retty_impl<To, const From*const> {
typedef const To* ret_type; };
template<class To, class From, class SimpleFrom>
struct cast_retty_wrap {
typedef typename cast_retty<To, SimpleFrom>::ret_type ret_type;
};
template<class To, class FromTy>
struct cast_retty_wrap<To, FromTy, FromTy> {
typedef typename cast_retty_impl<To,FromTy>::ret_type ret_type;
};
template<class To, class From>
struct cast_retty {
typedef typename cast_retty_wrap<To, From,
typename simplify_type<From>::SimpleType>::ret_type ret_type;
};
template<class To, class From, class SimpleFrom> struct cast_convert_val {
static typename cast_retty<To, From>::ret_type doit(const From &Val) {
return cast_convert_val<To, SimpleFrom,
typename simplify_type<SimpleFrom>::SimpleType>::doit(
simplify_type<From>::getSimplifiedValue(Val));
}
};
template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> {
static typename cast_retty<To, FromTy>::ret_type doit(const FromTy &Val) {
return reinterpret_cast<typename cast_retty<To, FromTy>::ret_type>(
const_cast<FromTy&>(Val));
}
};
template <class X, class Y>
inline typename cast_retty<X, Y>::ret_type cast(const Y &Val) {
assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!");
return cast_convert_val<X, Y,
typename simplify_type<Y>::SimpleType>::doit(Val);
}
template <class X, class Y>
inline typename cast_retty<X, Y*>::ret_type cast_or_null(Y *Val) {
if (Val == 0) return 0;
assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!");
return cast<X>(Val);
}
template <class X, class Y>
inline typename cast_retty<X, Y>::ret_type dyn_cast(const Y &Val) {
return isa<X>(Val) ? cast<X, Y>(Val) : 0;
}
template <class X, class Y>
inline typename cast_retty<X, Y>::ret_type dyn_cast_or_null(const Y &Val) {
return (Val && isa<X>(Val)) ? cast<X, Y>(Val) : 0;
}
#ifdef DEBUG_CAST_OPERATORS
#include "llvm/Support/Streams.h"
struct bar {
bar() {}
private:
bar(const bar &);
};
struct foo {
void ext() const;
};
template <> inline bool isa_impl<foo,bar>(const bar &Val) {
cerr << "Classof: " << &Val << "\n";
return true;
}
bar *fub();
void test(bar &B1, const bar *B2) {
const bar &B3 = B1;
const bar *const B4 = B2;
if (!isa<foo>(B1)) return;
if (!isa<foo>(B2)) return;
if (!isa<foo>(B3)) return;
if (!isa<foo>(B4)) return;
foo &F1 = cast<foo>(B1);
const foo *F3 = cast<foo>(B2);
const foo *F4 = cast<foo>(B2);
const foo &F8 = cast<foo>(B3);
const foo *F9 = cast<foo>(B4);
foo *F10 = cast<foo>(fub());
const foo *F11 = cast_or_null<foo>(B2);
const foo *F12 = cast_or_null<foo>(B2);
const foo *F13 = cast_or_null<foo>(B4);
const foo *F14 = cast_or_null<foo>(fub());
}
bar *fub() { return 0; }
void main() {
bar B;
test(B, &B);
}
#endif
}
#endif