#ifndef LLVM_SUPPORT_CASTING_H
#define LLVM_SUPPORT_CASTING_H
#include "llvm/Support/Compiler.h"
#include "llvm/Support/type_traits.h"
#include <cassert>
namespace llvm {
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 typename simplify_type<From>::SimpleType NonConstSimpleType;
typedef typename add_const_past_pointer<NonConstSimpleType>::type
SimpleType;
typedef typename add_lvalue_reference_if_not_pointer<SimpleType>::type
RetType;
static RetType getSimplifiedValue(const From& Val) {
return simplify_type<From>::getSimplifiedValue(const_cast<From&>(Val));
}
};
template <typename To, typename From, typename Enabler = void>
struct isa_impl {
static inline bool doit(const From &Val) {
return To::classof(&Val);
}
};
template <typename To, typename From>
struct isa_impl<
To, From, typename std::enable_if<std::is_base_of<To, From>::value>::type> {
static inline bool doit(const From &) { return true; }
};
template <typename To, typename From> struct isa_impl_cl {
static inline bool doit(const From &Val) {
return isa_impl<To, From>::doit(Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, const From> {
static inline bool doit(const From &Val) {
return isa_impl<To, From>::doit(Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, From*> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, From*const> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, const From*> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template <typename To, typename From> struct isa_impl_cl<To, const From*const> {
static inline bool doit(const From *Val) {
assert(Val && "isa<> used on a null pointer");
return isa_impl<To, From>::doit(*Val);
}
};
template<typename To, typename From, typename SimpleFrom>
struct isa_impl_wrap {
static bool doit(const From &Val) {
return isa_impl_wrap<To, SimpleFrom,
typename simplify_type<SimpleFrom>::SimpleType>::doit(
simplify_type<const From>::getSimplifiedValue(Val));
}
};
template<typename To, typename FromTy>
struct isa_impl_wrap<To, FromTy, FromTy> {
static bool doit(const FromTy &Val) {
return isa_impl_cl<To,FromTy>::doit(Val);
}
};
template <class X, class Y>
LLVM_ATTRIBUTE_UNUSED_RESULT inline bool isa(const Y &Val) {
return isa_impl_wrap<X, const Y,
typename simplify_type<const Y>::SimpleType>::doit(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(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) {
typename cast_retty<To, FromTy>::ret_type Res2
= (typename cast_retty<To, FromTy>::ret_type)const_cast<FromTy&>(Val);
return Res2;
}
};
template <class X> struct is_simple_type {
static const bool value =
std::is_same<X, typename simplify_type<X>::SimpleType>::value;
};
template <class X, class Y>
inline typename std::enable_if<!is_simple_type<Y>::value,
typename cast_retty<X, const Y>::ret_type>::type
cast(const Y &Val) {
assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!");
return cast_convert_val<
X, const Y, typename simplify_type<const Y>::SimpleType>::doit(Val);
}
template <class X, class Y>
inline typename cast_retty<X, Y>::ret_type cast(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(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>
LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
cast_or_null(Y *Val) {
if (!Val) return nullptr;
assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!");
return cast<X>(Val);
}
template <class X, class Y>
LLVM_ATTRIBUTE_UNUSED_RESULT inline typename std::enable_if<
!is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type>::type
dyn_cast(const Y &Val) {
return isa<X>(Val) ? cast<X>(Val) : nullptr;
}
template <class X, class Y>
LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y>::ret_type
dyn_cast(Y &Val) {
return isa<X>(Val) ? cast<X>(Val) : nullptr;
}
template <class X, class Y>
LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
dyn_cast(Y *Val) {
return isa<X>(Val) ? cast<X>(Val) : nullptr;
}
template <class X, class Y>
LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
dyn_cast_or_null(Y *Val) {
return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr;
}
}
#endif