//===-- llvm/Support/Casting.h - Allow flexible, checked, casts -*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This file defines the isa<X>(), cast<X>(), dyn_cast<X>(), cast_or_null<X>(),
#ifndef LLVM_SUPPORT_CASTING_H
#define LLVM_SUPPORT_CASTING_H
+#include <cassert>
+
namespace llvm {
//===----------------------------------------------------------------------===//
// if (isa<Type*>(myVal)) { ... }
//
template <typename To, typename From>
-inline bool isa_impl(const From &Val) {
- return To::classof(&Val);
-}
+struct isa_impl {
+ static inline bool doit(const From &Val) {
+ return To::classof(&Val);
+ }
+};
template<typename To, typename From, typename SimpleType>
struct isa_impl_wrap {
// When From != SimplifiedType, we can simplify the type some more by using
// the simplify_type template.
static bool doit(const From &Val) {
- return isa_impl_cl<const SimpleType>::template
+ return isa_impl_cl<const SimpleType>::template
isa<To>(simplify_type<const From>::getSimplifiedValue(Val));
}
};
struct isa_impl_wrap<To, const FromTy, const FromTy> {
// When From == SimpleType, we are as simple as we are going to get.
static bool doit(const FromTy &Val) {
- return isa_impl<To,FromTy>(Val);
+ return isa_impl<To,FromTy>::doit(Val);
}
};
template<class To, class From>
struct cast_retty {
- typedef typename cast_retty_wrap<To, From,
+ typedef typename cast_retty_wrap<To, From,
typename simplify_type<From>::SimpleType>::ret_type ret_type;
};
template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> {
// This _is_ a simple type, just cast it.
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));
+ typename cast_retty<To, FromTy>::ret_type Res2
+ = (typename cast_retty<To, FromTy>::ret_type)const_cast<FromTy&>(Val);
+ return Res2;
}
};
//
template <class X, class Y>
-inline typename cast_retty<X, Y>::ret_type dyn_cast(Y Val) {
+inline typename cast_retty<X, Y>::ret_type dyn_cast(const Y &Val) {
return isa<X>(Val) ? cast<X, Y>(Val) : 0;
}
// value is accepted.
//
template <class X, class Y>
-inline typename cast_retty<X, Y>::ret_type dyn_cast_or_null(Y Val) {
+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 <iostream>
+#include "llvm/Support/raw_ostream.h"
struct bar {
bar() {}
}*/
};
-template <> inline bool isa_impl<foo,bar>(const bar &Val) {
- cerr << "Classof: " << &Val << "\n";
- return true;
-}
+template <> struct isa_impl<foo,bar> {
+ static inline bool doit(const bar &Val) {
+ dbgs() << "Classof: " << &Val << "\n";
+ return true;
+ }
+};
bar *fub();
const foo *F12 = cast_or_null<foo>(B2);
const foo *F13 = cast_or_null<foo>(B4);
const foo *F14 = cast_or_null<foo>(fub()); // Shouldn't print.
-
+
// These lines are errors...
//foo *F20 = cast<foo>(B2); // Yields const foo*
//foo &F21 = cast<foo>(B3); // Yields const foo&