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Diffstat (limited to 'include/com/sun/star/uno/Any.h')
| -rw-r--r-- | include/com/sun/star/uno/Any.h | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/include/com/sun/star/uno/Any.h b/include/com/sun/star/uno/Any.h new file mode 100644 index 000000000..577b31344 --- /dev/null +++ b/include/com/sun/star/uno/Any.h @@ -0,0 +1,486 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ +#ifndef INCLUDED_COM_SUN_STAR_UNO_ANY_H +#define INCLUDED_COM_SUN_STAR_UNO_ANY_H + +#include "sal/config.h" + +#include <cstddef> + +#include "rtl/ustring.hxx" +#include "uno/any2.h" +#include "typelib/typedescription.h" +#include "cppu/unotype.hxx" +#include "com/sun/star/uno/TypeClass.hdl" +#include "rtl/alloc.h" + +namespace com +{ +namespace sun +{ +namespace star +{ +namespace uno +{ + +class Type; + +/** C++ class representing an IDL any. + This class is used to transport any type defined in IDL. The class inherits from the + binary C representation of uno_Any. + You can insert a value by either using the <<= operators or the template function makeAny(). + No any can hold an any. You can extract values from an any by using the >>= operators which + return true if the any contains an assignable value (no data loss), e.g. the any contains a + short and you >>= it into a long variable. +*/ +class SAL_WARN_UNUSED SAL_DLLPUBLIC_RTTI Any : public uno_Any +{ +public: + /// @cond INTERNAL + // these are here to force memory de/allocation to sal lib. + static void * SAL_CALL operator new ( size_t nSize ) + { return ::rtl_allocateMemory( nSize ); } + static void SAL_CALL operator delete ( void * pMem ) + { ::rtl_freeMemory( pMem ); } + static void * SAL_CALL operator new ( size_t, void * pMem ) + { return pMem; } + static void SAL_CALL operator delete ( void *, void * ) + {} + /// @endcond + + /** Default constructor: Any holds no value; its type is void. + */ + inline Any(); + + /** Templated ctor. Sets a copy of the given value. + + @param value value of the Any + */ + template <typename T> + explicit inline Any( T const & value ); + /// Ctor support for C++ bool. + explicit inline Any( bool value ); + +#if defined LIBO_INTERNAL_ONLY + template<typename T1, typename T2> + explicit inline Any(rtl::OUStringConcat<T1, T2> && value); + template<typename T1, typename T2> + explicit Any(rtl::OUStringConcat<T1, T2> const &) = delete; +#endif + + /** Copy constructor: Sets value of the given any. + + @param rAny another any + */ + inline Any( const Any & rAny ); + + /** Constructor: Sets a copy of the given data. + + @param pData_ value + @param rType type of value + */ + inline Any( const void * pData_, const Type & rType ); + + /** Constructor: Sets a copy of the given data. + + @param pData_ value + @param pTypeDescr type of value + */ + inline Any( const void * pData_, typelib_TypeDescription * pTypeDescr ); + + /** Constructor: Sets a copy of the given data. + + @param pData_ value + @param pType_ type of value + */ + inline Any( const void * pData_, typelib_TypeDescriptionReference * pType_ ); + +#if defined LIBO_INTERNAL_ONLY + Any(bool const *, Type const &) = delete; + Any(bool const *, typelib_TypeDescription *) = delete; + Any(bool const *, typelib_TypeDescriptionReference *) = delete; + Any(sal_Bool const *, Type const &) = delete; + Any(sal_Bool const *, typelib_TypeDescription *) = delete; + Any(sal_Bool const *, typelib_TypeDescriptionReference *) = delete; + Any(std::nullptr_t, Type const & type): + Any(static_cast<void *>(nullptr), type) {} + Any(std::nullptr_t, typelib_TypeDescription * type): + Any(static_cast<void *>(nullptr), type) {} + Any(std::nullptr_t, typelib_TypeDescriptionReference * type): + Any(static_cast<void *>(nullptr), type) {} +#endif + + /** Destructor: Destructs any content and frees memory. + */ + inline ~Any(); + + /** Assignment operator: Sets the value of the given any. + + @param rAny another any (right side) + @return this any + */ + inline Any & SAL_CALL operator = ( const Any & rAny ); + +#if defined LIBO_INTERNAL_ONLY + inline Any(Any && other) noexcept; + inline Any & operator =(Any && other) noexcept; +#endif + + /** Gets the type of the set value. + + @return a Type object of the set value + */ + const Type & SAL_CALL getValueType() const + { return * reinterpret_cast< const Type * >( &pType ); } + /** Gets the type of the set value. + + @return the unacquired type description reference of the set value + */ + typelib_TypeDescriptionReference * SAL_CALL getValueTypeRef() const + { return pType; } + + /** Gets the type description of the set value. Provides ownership of the type description! + Call an explicit typelib_typedescription_release() to release afterwards. + + @param ppTypeDescr a pointer to type description pointer + */ + void SAL_CALL getValueTypeDescription( typelib_TypeDescription ** ppTypeDescr ) const + { ::typelib_typedescriptionreference_getDescription( ppTypeDescr, pType ); } + + /** Gets the type class of the set value. + + @return the type class of the set value + */ + TypeClass SAL_CALL getValueTypeClass() const + { return static_cast<TypeClass>(pType->eTypeClass); } + + /** Gets the type name of the set value. + + @return the type name of the set value + */ + inline ::rtl::OUString SAL_CALL getValueTypeName() const; + + /** Tests if any contains a value. + + @return true if any has a value, false otherwise + */ + bool SAL_CALL hasValue() const + { return (typelib_TypeClass_VOID != pType->eTypeClass); } + + /** Gets a pointer to the set value. + + @return a pointer to the set value + */ + const void * SAL_CALL getValue() const + { return pData; } + + /** Provides a value of specified type, so you can easily write e.g. + <pre> + sal_Int32 myVal = myAny.get<sal_Int32>(); + </pre> + Widening conversion without data loss is taken into account. + Throws a com::sun::star::uno::RuntimeException if the specified type + cannot be provided. + + @return value of specified type + @exception com::sun::star::uno::RuntimeException + in case the specified type cannot be provided + */ + template <typename T> + inline T get() const; + + /** Sets a value. If the any already contains a value, that value will be destructed + and its memory freed. + + @param pData_ pointer to value + @param rType type of value + */ + inline void SAL_CALL setValue( const void * pData_, const Type & rType ); + /** Sets a value. If the any already contains a value, that value will be destructed + and its memory freed. + + @param pData_ pointer to value + @param pType_ type of value + */ + inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescriptionReference * pType_ ); + /** Sets a value. If the any already contains a value, that value will be destructed + and its memory freed. + + @param pData_ pointer to value + @param pTypeDescr type description of value + */ + inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescription * pTypeDescr ); + +#if defined LIBO_INTERNAL_ONLY + void setValue(bool const *, Type const &) = delete; + void setValue(bool const *, typelib_TypeDescriptionReference *) = delete; + void setValue(bool const *, typelib_TypeDescription *) = delete; + void setValue(sal_Bool const *, Type const &) = delete; + void setValue(sal_Bool const *, typelib_TypeDescriptionReference *) + = delete; + void setValue(sal_Bool const *, typelib_TypeDescription *) = delete; + void setValue(std::nullptr_t, Type const & type) + { setValue(static_cast<void *>(nullptr), type); } + void setValue(std::nullptr_t, typelib_TypeDescriptionReference * type) + { setValue(static_cast<void *>(nullptr), type); } + void setValue(std::nullptr_t, typelib_TypeDescription * type) + { setValue(static_cast<void *>(nullptr), type); } +#endif + + /** Clears this any. If the any already contains a value, that value will be destructed + and its memory freed. After this has been called, the any does not contain a value. + */ + inline void SAL_CALL clear(); + + /** Tests whether this any is extractable to a value of given type. + Widening conversion without data loss is taken into account. + + @param rType destination type + @return true if this any is extractable to value of given type (e.g. using >>= operator) + */ + inline bool SAL_CALL isExtractableTo( const Type & rType ) const; + + /** Tests whether this any can provide a value of specified type. + Widening conversion without data loss is taken into account. + + @return true if this any can provide a value of specified type + (e.g. using >>= operator) + */ + template <typename T> + inline bool has() const; + + /** Equality operator: compares two anys. + The values need not be of equal type, e.g. a short integer is compared to a long integer. + + @param rAny another any (right side) + @return true if both any contains equal values + */ + inline bool SAL_CALL operator == ( const Any & rAny ) const; + /** Inequality operator: compares two anys. + The values need not be of equal type, e.g. a short integer is compared to a long integer. + + @param rAny another any (right side) + @return true if both any contains unequal values + */ + inline bool SAL_CALL operator != ( const Any & rAny ) const; + +private: +#if !defined LIBO_INTERNAL_ONLY + /// @cond INTERNAL + // Forbid use with ambiguous type (sal_Unicode, sal_uInt16): + explicit Any(sal_uInt16) SAL_DELETED_FUNCTION; + /// @endcond +#endif +}; + +#if !defined LIBO_INTERNAL_ONLY +/// @cond INTERNAL +// Forbid use with ambiguous type (sal_Unicode, sal_uInt16): +template<> sal_uInt16 Any::get<sal_uInt16>() const SAL_DELETED_FUNCTION; +template<> bool Any::has<sal_uInt16>() const SAL_DELETED_FUNCTION; +/// @endcond +#endif + +/** Template function to generically construct an any from a C++ value. + + This can be useful with an explicitly specified template parameter, when the + (UNO) type recorded in the Any instance shall be different from what would + be deduced from the (C++) type of the argument if no template parameter were + specified explicitly. + + @tparam C value type + @param value a value + @return an any +*/ +template< class C > +inline Any SAL_CALL makeAny( const C & value ); + +#if !defined LIBO_INTERNAL_ONLY +template<> inline Any SAL_CALL makeAny(sal_uInt16 const & value); +#endif + +template<> Any SAL_CALL makeAny(Any const &) SAL_DELETED_FUNCTION; + +/** Wrap a value in an Any, if necessary. + + The difference to makeAny is that makeAny cannot be called on an Any, while + toAny just returns the given Any. + + @since LibreOffice 5.0 +*/ +template<typename T> inline Any toAny(T const & value); + +template<> inline Any toAny(Any const & value); + +#if defined LIBO_INTERNAL_ONLY + +/** Extract a value from an Any, if necessary. + + The difference to operator >>= is that operator >>= cannot be called with an + Any as right-hand side (in LIBO_INTERNAL_ONLY), while fromAny just passes on + the given Any (and always succeeds) in the specialization for T = Any. + + @tparam T any type representing a UNO type + + @param any any Any value + + @param value a non-null pointer, receiving the extracted value if + extraction succeeded (and left unmodified otherwise) + + @return true iff extraction succeeded + + @since LibreOffice 5.3 +*/ +template<typename T> inline bool fromAny(Any const & any, T * value); + +template<> inline bool fromAny(Any const & any, Any * value); + +#endif + +class BaseReference; + +/** Template binary <<= operator to set the value of an any. + + @tparam C value type + @param rAny destination any (left side) + @param value source value (right side) +*/ +template< class C > +inline void SAL_CALL operator <<= ( Any & rAny, const C & value ); + +// additionally for C++ bool: +template<> +inline void SAL_CALL operator <<= ( Any & rAny, bool const & value ); + +/** Template binary >>= operator to assign a value from an any. + If the any does not contain a value that can be assigned without data loss, then this + operation will fail returning false. + + @tparam C value type + @param rAny source any (left side) + @param value destination value (right side) + @return true if assignment was possible without data loss +*/ +template< class C > +inline bool SAL_CALL operator >>= ( const Any & rAny, C & value ); + +/** Template equality operator: compares set value of left side any to right side value. + The values need not be of equal type, e.g. a short integer is compared to a long integer. + This operator can be implemented as template member function, if all supported compilers + can cope with template member functions. + + @tparam C value type + @param rAny another any (left side) + @param value a value (right side) + @return true if values are equal, false otherwise +*/ +template< class C > +inline bool SAL_CALL operator == ( const Any & rAny, const C & value ); +/** Template inequality operator: compares set value of left side any to right side value. + The values need not be of equal type, e.g. a short integer is compared to a long integer. + This operator can be implemented as template member function, if all supported compilers + can cope with template member functions. + + @tparam C value type + @param rAny another any (left side) + @param value a value (right side) + @return true if values are unequal, false otherwise +*/ +template< class C > +inline bool SAL_CALL operator != ( const Any & rAny, const C & value ); + +// additional specialized >>= and == operators +// bool +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Bool & value ); +template<> +inline bool SAL_CALL operator == ( const Any & rAny, const sal_Bool & value ); +template<> +inline bool SAL_CALL operator >>= ( Any const & rAny, bool & value ); +template<> +inline bool SAL_CALL operator == ( Any const & rAny, bool const & value ); +// byte +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int8 & value ); +// short +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int16 & value ); +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt16 & value ); +// long +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int32 & value ); +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt32 & value ); +// hyper +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int64 & value ); +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt64 & value ); +// float +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, float & value ); +// double +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, double & value ); +// string +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, ::rtl::OUString & value ); +template<> +inline bool SAL_CALL operator == ( const Any & rAny, const ::rtl::OUString & value ); +// type +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, Type & value ); +template<> +inline bool SAL_CALL operator == ( const Any & rAny, const Type & value ); +// any +#if !defined LIBO_INTERNAL_ONLY +template<> +inline bool SAL_CALL operator >>= ( const Any & rAny, Any & value ); +#endif +// interface +template<> +inline bool SAL_CALL operator == ( const Any & rAny, const BaseReference & value ); + +} +} +} +} + +/** Gets the meta type of IDL type any. + + There are cases (involving templates) where uses of getCppuType are known to + not compile. Use cppu::UnoType or cppu::getTypeFavourUnsigned instead. + + The dummy parameter is just a typed pointer for function signature. + + @return type of IDL type any + + @deprecated + Use cppu::UnoType instead. +*/ +SAL_DEPRECATED("use cppu::UnoType") +inline const ::com::sun::star::uno::Type & SAL_CALL getCppuType( SAL_UNUSED_PARAMETER const ::com::sun::star::uno::Any * ) +{ + return ::cppu::UnoType< ::com::sun::star::uno::Any >::get(); +} + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |