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-rw-r--r-- | include/comphelper/unwrapargs.hxx | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/include/comphelper/unwrapargs.hxx b/include/comphelper/unwrapargs.hxx new file mode 100644 index 0000000000..76eb8b838d --- /dev/null +++ b/include/comphelper/unwrapargs.hxx @@ -0,0 +1,122 @@ +/* -*- 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_COMPHELPER_UNWRAPARGS_HXX +#define INCLUDED_COMPHELPER_UNWRAPARGS_HXX + +#include <sal/config.h> + +#include <optional> + +#include <com/sun/star/uno/Sequence.hxx> +#include <com/sun/star/uno/XInterface.hpp> +#include <com/sun/star/lang/IllegalArgumentException.hpp> +#include <cppu/unotype.hxx> + +namespace comphelper { + +/// @internal +namespace detail { + inline void unwrapArgsError( + const OUString& str, sal_Int32 nArg, + const css::uno::Reference< css::uno::XInterface >& xErrorContext = + css::uno::Reference< css::uno::XInterface >() ) + { + throw css::lang::IllegalArgumentException( + str, xErrorContext, static_cast< sal_Int16 >( nArg ) ); + } + + template< typename T, typename... Args > + inline void unwrapArgsError( const OUString& str, sal_Int32 nArg, T&, Args&... args ) + { + return unwrapArgsError( str, nArg, args... ); + } + + inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >&, + sal_Int32, + const css::uno::Reference< css::uno::XInterface >& ) + { + return; + } + + inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >&, + sal_Int32 ) + { + return; + } + + template< typename T, typename... Args > + inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >& seq, + sal_Int32 nArg, ::std::optional< T >& v, Args&... args ); + + template< typename T, typename... Args > + inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >& seq, + sal_Int32 nArg, T& v, Args&... args ) + { + if( seq.getLength() <= nArg ) + { + return unwrapArgsError( OUString( "No such argument available!"), + nArg, args... ); + } + if( !fromAny( seq[nArg], &v ) ) + { + OUString msg = + "Cannot extract ANY { " + + seq[nArg].getValueType().getTypeName() + + " } to " + + ::cppu::UnoType<T>::get().getTypeName() + + "!"; + return unwrapArgsError( msg, nArg, args... ); + } + return unwrapArgs( seq, ++nArg, args... ); + } + + template< typename T, typename... Args > + inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >& seq, + sal_Int32 nArg, ::std::optional< T >& v, Args&... args ) + { + if( nArg < seq.getLength() ) + { + T t; + unwrapArgs( seq, nArg, t, args... ); + v = t; + } else { + unwrapArgs( seq, ++nArg, args... ); + } + } +} + +template< typename... Args > +inline void unwrapArgs( + const css::uno::Sequence< css::uno::Any >& seq, + Args&... args ) +{ + return detail::unwrapArgs( seq, 0, args... ); +} + +} // namespace comphelper + +#endif // ! defined( INCLUDED_COMPHELPER_UNWRAPARGS_HXX) + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |