60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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* Copyright (c) 2001-2008
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* DecisionSoft Limited. All rights reserved.
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* Copyright (c) 2004-2008
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* Oracle. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Id: FunctionExactlyOne.hpp,v 1.11 2008/01/08 18:47:31 jpcs Exp $
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*/
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/*
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* xf:exactly-one(item* $srcval) => item
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*/
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#ifndef _FUNCTIONEXACTLYONE_HPP
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#define _FUNCTIONEXACTLYONE_HPP
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#include <xqilla/framework/XQillaExport.hpp>
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#include <xqilla/ast/ConstantFoldingFunction.hpp>
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class XQILLA_API FunctionExactlyOne : public ConstantFoldingFunction
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{
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public:
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static const XMLCh name[];
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static const unsigned int minArgs;
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static const unsigned int maxArgs;
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FunctionExactlyOne(const VectorOfASTNodes &args, XPath2MemoryManager* memMgr);
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Result createResult(DynamicContext* context, int flags=0) const;
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private:
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class ExactlyOneResult : public ResultImpl
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{
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public:
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ExactlyOneResult(const FunctionExactlyOne *func, int flags);
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Item::Ptr next(DynamicContext *context);
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std::string asString(DynamicContext *context, int indent) const;
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private:
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int _flags;
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const FunctionExactlyOne *_func;
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Result _arg;
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unsigned int _argNo;
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};
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};
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#endif // _FUNCTIONEXACTLYONE_HPP
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