452 lines
16 KiB
C++
452 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_COM_SUN_STAR_UNO_ANY_H
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#define INCLUDED_COM_SUN_STAR_UNO_ANY_H
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#include <sal/config.h>
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#include <cstddef>
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#include <rtl/ustring.hxx>
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#include <uno/any2.h>
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#include <typelib/typedescription.h>
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#include <cppu/unotype.hxx>
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#include <com/sun/star/uno/TypeClass.hdl>
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#include <rtl/alloc.h>
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namespace com
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{
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namespace sun
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{
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namespace star
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{
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namespace uno
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{
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class Type;
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/** C++ class representing an IDL any.
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This class is used to transport any type defined in IDL. The class inherits from the
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binary C representation of uno_Any.
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You can insert a value by either using the <<= operators or the template function makeAny().
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No any can hold an any. You can extract values from an any by using the >>= operators which
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return true if the any contains an assignable value (no data loss), e.g. the any contains a
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short and you >>= it into a long variable.
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*/
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class SAL_WARN_UNUSED SAL_DLLPUBLIC_RTTI Any : public uno_Any
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{
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public:
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/// @cond INTERNAL
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// these are here to force memory de/allocation to sal lib.
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inline static void * SAL_CALL operator new ( size_t nSize )
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{ return ::rtl_allocateMemory( nSize ); }
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inline static void SAL_CALL operator delete ( void * pMem )
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{ ::rtl_freeMemory( pMem ); }
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inline static void * SAL_CALL operator new ( size_t, void * pMem )
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{ return pMem; }
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inline static void SAL_CALL operator delete ( void *, void * )
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{}
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/// @endcond
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/** Default constructor: Any holds no value; its type is void.
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*/
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inline Any();
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/** Templated ctor. Sets a copy of the given value.
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@param value value of the Any
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*/
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template <typename T>
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explicit inline Any( T const & value );
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/// Ctor support for C++ bool.
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explicit inline Any( bool value );
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#if defined LIBO_INTERNAL_ONLY
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template<typename T1, typename T2>
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explicit inline Any(rtl::OUStringConcat<T1, T2> const & value);
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#endif
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/** Copy constructor: Sets value of the given any.
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@param rAny another any
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*/
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inline Any( const Any & rAny );
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/** Constructor: Sets a copy of the given data.
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@param pData_ value
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@param rType type of value
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*/
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inline Any( const void * pData_, const Type & rType );
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/** Constructor: Sets a copy of the given data.
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@param pData_ value
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@param pTypeDescr type of value
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*/
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inline Any( const void * pData_, typelib_TypeDescription * pTypeDescr );
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/** Constructor: Sets a copy of the given data.
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@param pData_ value
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@param pType_ type of value
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*/
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inline Any( const void * pData_, typelib_TypeDescriptionReference * pType_ );
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#if defined LIBO_INTERNAL_ONLY
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Any(bool const *, Type const &) = delete;
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Any(bool const *, typelib_TypeDescription *) = delete;
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Any(bool const *, typelib_TypeDescriptionReference *) = delete;
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Any(sal_Bool const *, Type const &) = delete;
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Any(sal_Bool const *, typelib_TypeDescription *) = delete;
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Any(sal_Bool const *, typelib_TypeDescriptionReference *) = delete;
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Any(std::nullptr_t, Type const & type):
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Any(static_cast<void *>(nullptr), type) {}
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Any(std::nullptr_t, typelib_TypeDescription * type):
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Any(static_cast<void *>(nullptr), type) {}
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Any(std::nullptr_t, typelib_TypeDescriptionReference * type):
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Any(static_cast<void *>(nullptr), type) {}
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#endif
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/** Destructor: Destructs any content and frees memory.
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*/
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inline ~Any();
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/** Assignment operator: Sets the value of the given any.
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@param rAny another any (right side)
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@return this any
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*/
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inline Any & SAL_CALL operator = ( const Any & rAny );
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/** Gets the type of the set value.
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@return a Type object of the set value
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*/
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inline const Type & SAL_CALL getValueType() const
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{ return * reinterpret_cast< const Type * >( &pType ); }
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/** Gets the type of the set value.
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@return the unacquired type description reference of the set value
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*/
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inline typelib_TypeDescriptionReference * SAL_CALL getValueTypeRef() const
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{ return pType; }
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/** Gets the type description of the set value. Provides ownership of the type description!
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Call an explicit typelib_typedescription_release() to release afterwards.
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@param ppTypeDescr a pointer to type description pointer
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*/
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inline void SAL_CALL getValueTypeDescription( typelib_TypeDescription ** ppTypeDescr ) const
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{ ::typelib_typedescriptionreference_getDescription( ppTypeDescr, pType ); }
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/** Gets the type class of the set value.
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@return the type class of the set value
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*/
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inline TypeClass SAL_CALL getValueTypeClass() const
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{ return (TypeClass)pType->eTypeClass; }
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/** Gets the type name of the set value.
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@return the type name of the set value
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*/
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inline ::rtl::OUString SAL_CALL getValueTypeName() const;
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/** Tests if any contains a value.
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@return true if any has a value, false otherwise
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*/
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inline bool SAL_CALL hasValue() const
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{ return (typelib_TypeClass_VOID != pType->eTypeClass); }
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/** Gets a pointer to the set value.
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@return a pointer to the set value
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*/
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inline const void * SAL_CALL getValue() const
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{ return pData; }
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/** Provides a value of specified type, so you can easily write e.g.
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<pre>
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sal_Int32 myVal = myAny.get<sal_Int32>();
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</pre>
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Widening conversion without data loss is taken into account.
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Throws a com::sun::star::uno::RuntimeException if the specified type
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cannot be provided.
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@return value of specified type
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@exception com::sun::star::uno::RuntimeException
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in case the specified type cannot be provided
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*/
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template <typename T>
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inline T get() const;
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/** Sets a value. If the any already contains a value, that value will be destructed
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and its memory freed.
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@param pData_ pointer to value
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@param rType type of value
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*/
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inline void SAL_CALL setValue( const void * pData_, const Type & rType );
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/** Sets a value. If the any already contains a value, that value will be destructed
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and its memory freed.
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@param pData_ pointer to value
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@param pType_ type of value
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*/
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inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescriptionReference * pType_ );
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/** Sets a value. If the any already contains a value, that value will be destructed
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and its memory freed.
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@param pData_ pointer to value
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@param pTypeDescr type description of value
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*/
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inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescription * pTypeDescr );
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#if defined LIBO_INTERNAL_ONLY
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void setValue(bool const *, Type const &) = delete;
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void setValue(bool const *, typelib_TypeDescriptionReference *) = delete;
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void setValue(bool const *, typelib_TypeDescription *) = delete;
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void setValue(sal_Bool const *, Type const &) = delete;
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void setValue(sal_Bool const *, typelib_TypeDescriptionReference *)
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= delete;
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void setValue(sal_Bool const *, typelib_TypeDescription *) = delete;
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void setValue(std::nullptr_t, Type const & type)
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{ setValue(static_cast<void *>(nullptr), type); }
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void setValue(std::nullptr_t, typelib_TypeDescriptionReference * type)
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{ setValue(static_cast<void *>(nullptr), type); }
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void setValue(std::nullptr_t, typelib_TypeDescription * type)
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{ setValue(static_cast<void *>(nullptr), type); }
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#endif
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/** Clears this any. If the any already contains a value, that value will be destructed
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and its memory freed. After this has been called, the any does not contain a value.
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*/
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inline void SAL_CALL clear();
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/** Tests whether this any is extractable to a value of given type.
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Widening conversion without data loss is taken into account.
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@param rType destination type
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@return true if this any is extractable to value of given type (e.g. using >>= operator)
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*/
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inline bool SAL_CALL isExtractableTo( const Type & rType ) const;
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/** Tests whether this any can provide a value of specified type.
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Widening conversion without data loss is taken into account.
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@return true if this any can provide a value of specified type
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(e.g. using >>= operator)
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*/
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template <typename T>
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inline bool has() const;
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/** Equality operator: compares two anys.
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The values need not be of equal type, e.g. a short integer is compared to a long integer.
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@param rAny another any (right side)
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@return true if both any contains equal values
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*/
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inline bool SAL_CALL operator == ( const Any & rAny ) const;
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/** Unequality operator: compares two anys.
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The values need not be of equal type, e.g. a short integer is compared to a long integer.
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@param rAny another any (right side)
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@return true if both any contains unequal values
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*/
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inline bool SAL_CALL operator != ( const Any & rAny ) const;
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private:
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#if !defined LIBO_INTERNAL_ONLY
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/// @cond INTERNAL
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// Forbid use with ambiguous type (sal_Unicode, sal_uInt16):
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explicit Any(sal_uInt16) SAL_DELETED_FUNCTION;
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/// @endcond
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#endif
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};
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#if !defined LIBO_INTERNAL_ONLY
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/// @cond INTERNAL
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// Forbid use with ambiguous type (sal_Unicode, sal_uInt16):
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template<> sal_uInt16 Any::get<sal_uInt16>() const SAL_DELETED_FUNCTION;
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template<> bool Any::has<sal_uInt16>() const SAL_DELETED_FUNCTION;
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/// @endcond
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#endif
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/** Template function to generically construct an any from a C++ value.
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This can be useful with an explicitly specified template parameter, when the
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(UNO) type recorded in the Any instance shall be different from what would
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be deduced from the (C++) type of the argument if no template parameter were
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specified explicitly.
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@tparam C value type
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@param value a value
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@return an any
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*/
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template< class C >
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inline Any SAL_CALL makeAny( const C & value );
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#if !defined LIBO_INTERNAL_ONLY
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template<> inline Any SAL_CALL makeAny(sal_uInt16 const & value);
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#endif
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template<> Any SAL_CALL makeAny(Any const &) SAL_DELETED_FUNCTION;
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/** Wrap a value in an Any, if necessary.
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The difference to makeAny is that makeAny cannot be called on an Any, while
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toAny just returns the given Any.
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@since LibreOffice 5.0
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*/
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template<typename T> inline Any toAny(T const & value);
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template<> inline Any toAny(Any const & value);
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class BaseReference;
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/** Template binary <<= operator to set the value of an any.
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@tparam C value type
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@param rAny destination any (left side)
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@param value source value (right side)
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*/
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template< class C >
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inline void SAL_CALL operator <<= ( Any & rAny, const C & value );
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// additionally for C++ bool:
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template<>
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inline void SAL_CALL operator <<= ( Any & rAny, bool const & value );
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/** Template binary >>= operator to assign a value from an any.
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If the any does not contain a value that can be assigned without data loss, then this
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operation will fail returning false.
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@tparam C value type
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@param rAny source any (left side)
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@param value destination value (right side)
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@return true if assignment was possible without data loss
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*/
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template< class C >
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inline bool SAL_CALL operator >>= ( const Any & rAny, C & value );
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/** Template equality operator: compares set value of left side any to right side value.
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The values need not be of equal type, e.g. a short integer is compared to a long integer.
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This operator can be implemented as template member function, if all supported compilers
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can cope with template member functions.
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@tparam C value type
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@param rAny another any (left side)
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@param value a value (right side)
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@return true if values are equal, false otherwise
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*/
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template< class C >
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inline bool SAL_CALL operator == ( const Any & rAny, const C & value );
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/** Template unequality operator: compares set value of left side any to right side value.
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The values need not be of equal type, e.g. a short integer is compared to a long integer.
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This operator can be implemented as template member function, if all supported compilers
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can cope with template member functions.
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@tparam C value type
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@param rAny another any (left side)
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@param value a value (right side)
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@return true if values are unequal, false otherwise
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*/
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template< class C >
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inline bool SAL_CALL operator != ( const Any & rAny, const C & value );
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// additional specialized >>= and == operators
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// bool
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Bool & value );
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template<>
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inline bool SAL_CALL operator == ( const Any & rAny, const sal_Bool & value );
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template<>
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inline bool SAL_CALL operator >>= ( Any const & rAny, bool & value );
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template<>
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inline bool SAL_CALL operator == ( Any const & rAny, bool const & value );
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// byte
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int8 & value );
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// short
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int16 & value );
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt16 & value );
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// long
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int32 & value );
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt32 & value );
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// hyper
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int64 & value );
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt64 & value );
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// float
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, float & value );
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// double
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, double & value );
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// string
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, ::rtl::OUString & value );
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template<>
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inline bool SAL_CALL operator == ( const Any & rAny, const ::rtl::OUString & value );
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// type
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, Type & value );
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template<>
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inline bool SAL_CALL operator == ( const Any & rAny, const Type & value );
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// any
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template<>
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inline bool SAL_CALL operator >>= ( const Any & rAny, Any & value );
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// interface
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template<>
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inline bool SAL_CALL operator == ( const Any & rAny, const BaseReference & value );
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}
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}
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}
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}
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/** Gets the meta type of IDL type any.
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There are cases (involving templates) where uses of getCppuType are known to
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not compile. Use cppu::UnoType or cppu::getTypeFavourUnsigned instead.
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The dummy parameter is just a typed pointer for function signature.
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@return type of IDL type any
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@deprecated
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Use cppu::UnoType instead.
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*/
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SAL_DEPRECATED("use cppu::UnoType")
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inline const ::com::sun::star::uno::Type & SAL_CALL getCppuType( SAL_UNUSED_PARAMETER const ::com::sun::star::uno::Any * )
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{
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return ::cppu::UnoType< ::com::sun::star::uno::Any >::get();
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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