/usr/include/root/Reflex/Any.h is in libroot-core-dev 5.34.19+dfsg-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Author: Stefan Roiser 2004
// See http://www.boost.org/libs/any for Documentation.
// Copyright Kevlin Henney, 2000, 2001, 2002. All rights reserved.
//
// Permission to use, copy, modify, and distribute this software for any
// purpose is hereby granted without fee, provided that this copyright and
// permissions notice appear in all copies and derivatives.
//
// This software is provided "as is" without express or implied warranty.
#ifndef Reflex_Any
#define Reflex_Any
// What: variant At boost::any
// who: contributed by Kevlin Henney,
// with features contributed and bugs found by
// Ed Brey, Mark Rodgers, Peter Dimov, and James Curran
// when: July 2001
// where: tested with BCC 5.5, MSVC 6.0, and g++ 2.95
#include "Reflex/Kernel.h"
#include <algorithm>
#include <typeinfo>
#include <iostream>
namespace Reflex {
/**
* @class Any Any.h Reflex/Any.h
* @author K. Henney
*/
class RFLX_API Any {
friend RFLX_API std::ostream& operator <<(std::ostream&,
const Any&);
public:
/** Constructor */
Any():
fContent(0) {}
/** Constructor */
template <typename ValueType> Any(const ValueType &value):
fContent(new Holder<ValueType>(value)) {}
/** Copy Constructor */
Any(const Any &other):
fContent(other.fContent ? other.fContent->Clone() : 0) {}
/** Dtor */
~Any() {
delete fContent;
}
/** Clear the content */
void
Clear() {
if (!Empty()) {
delete fContent;
fContent = 0;
}
}
/** bool operator */
operator bool() {
return !Empty();
}
/** Modifier */
Any&
Swap(Any& rhs) {
std::swap(fContent, rhs.fContent);
return *this;
}
/** Modifier */
template <typename ValueType> Any&
operator =(const ValueType& rhs) {
Any(rhs).Swap(*this);
return *this;
}
/** Modifier */
Any&
operator =(const Any& rhs) {
Any(rhs).Swap(*this);
return *this;
}
/** Query */
bool
Empty() const {
return !fContent;
}
/** Query */
const std::type_info&
TypeInfo() const {
return fContent ? fContent->TypeInfo() : typeid(void);
}
/** Adress */
void*
Address() const {
return fContent ? fContent->Address() : 0;
}
private:
// or public: ?
/**
* @class Placeholder BoostAny.h Reflex/BoostAny.h
* @author K. Henney
*/
class Placeholder {
public:
/** Constructor */
Placeholder() {}
/** Destructor */
virtual ~Placeholder() {}
/** Query */
virtual const std::type_info& TypeInfo() const = 0;
/** Query */
virtual Placeholder* Clone() const = 0;
/** Query */
virtual void* Address() const = 0;
};
/**
* @class Holder BoostAny.h Reflex/BoostAny.h
* @author K. Henney
*/
template <typename ValueType> class Holder: public Placeholder {
public:
/** Constructor */
Holder(const ValueType& value):
fHeld(value) {}
/** Query */
virtual const std::type_info&
TypeInfo() const {
return typeid(ValueType);
}
/** Clone */
virtual Placeholder*
Clone() const {
return new Holder(fHeld);
}
/** Address */
virtual void*
Address() const {
return (void*) (&fHeld);
}
/** representation */
ValueType fHeld;
};
/** representation */
template <typename ValueType> friend ValueType* any_cast(Any*);
// or public:
/** representation */
Placeholder* fContent;
};
/**
* @class BadAnyCast Any.h Reflex/Any.h
* @author K. Henney
*/
class BadAnyCast: public std::bad_cast {
public:
/** Constructor */
BadAnyCast() {}
/** Query */
virtual const char*
what() const throw() {
return "BadAnyCast: failed conversion using any_cast";
}
};
/** throw */
template <class E> void
throw_exception(const E& e) {
throw e;
}
/** value */
template <typename ValueType> ValueType*
any_cast(Any* operand) {
return operand && operand->TypeInfo() == typeid(ValueType)
? &static_cast<Any::Holder<ValueType>*>(operand->fContent)->fHeld : 0;
}
/** value */
template <typename ValueType> const ValueType*
any_cast(const Any* operand) {
return any_cast<ValueType>(const_cast<Any*>(operand));
}
/** value */
template <typename ValueType> ValueType
any_cast(const Any& operand) {
const ValueType* result = any_cast<ValueType>(&operand);
if (!result) {
throw_exception(BadAnyCast());
}
return *result;
}
/** stream operator */
RFLX_API std::ostream& operator <<(std::ostream&,
const Any&);
} // namespace Reflex
#endif // Reflex_Any
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