/usr/include/classad/attrrefs.h is in libclassad-dev 8.6.8~dfsg.1-2.
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*
* Copyright (C) 1990-2007, Condor Team, Computer Sciences Department,
* University of Wisconsin-Madison, WI.
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
***************************************************************/
#ifndef __CLASSAD_ATTRREFS_H__
#define __CLASSAD_ATTRREFS_H__
namespace classad {
/// Represents a attribute reference node (like .b) in the expression tree
class AttributeReference : public ExprTree
{
public:
/// Copy Constructor
AttributeReference(const AttributeReference &ref);
/// Destructor
virtual ~AttributeReference ();
/// Assignment operator
AttributeReference &operator=(const AttributeReference &ref);
/// node type
virtual NodeKind GetKind (void) const { return ATTRREF_NODE; }
/** Factory method to create attribute reference nodes.
@param expr The expression part of the reference (i.e., in
case of expr.attr). This parameter is NULL if the reference
is absolute (i.e., .attr) or simple (i.e., attr).
@param attrName The name of the reference. This string is
duplicated internally.
@param absolute True if the reference is an absolute reference
(i.e., in case of .attr). This parameter cannot be true if
expr is not NULL
*/
static AttributeReference *MakeAttributeReference(ExprTree *expr,
const std::string &attrName, bool absolute=false);
/** Deconstructor to get the components of an attribute reference
* @param expr The expression part of the reference (NULL for
* absolute or simple references)
* @param attr The name of the attribute being referred to
* @param abs true iff the reference is absolute (i.e., .attr)
*/
void GetComponents( ExprTree *&expr,std::string &attr, bool &abs ) const;
/** Overwrite the components of an attribute reference
* @param expr The expression part of the reference (NULL for
* absolute or simple references)
* @param attr The name of the attribute being referred to
* @param abs true iff the reference is absolute (i.e., .attr)
*/
bool SetComponents( ExprTree *expr, const std::string &attr, bool abs );
/** Return a copy of this attribute reference.
*/
virtual ExprTree* Copy( ) const;
/** Copy from the given reference into this reference.
* @param ref The reference to copy from.
* @return true if the copy succeeded, false otherwise.
*/
bool CopyFrom(const AttributeReference &ref);
/** Is this attribute reference the same as another?
* @param tree The reference to compare with
* @return true if they are the same, false otherwise.
*/
virtual bool SameAs(const ExprTree *tree) const;
/** Are the two attribute references the same?
* @param ref1 An attribute reference
* @param ref2 Another attribute reference
* @return true if they are the same, false otherwise.
*/
friend bool operator==(const AttributeReference &ref1, const AttributeReference &ref2);
protected:
/// Constructor
AttributeReference ();
private:
// private ctor for internal use
AttributeReference( ExprTree*, const std::string &, bool );
virtual void _SetParentScope( const ClassAd* p );
virtual bool _Evaluate( EvalState & , Value & ) const;
virtual bool _Evaluate( EvalState & , Value &, ExprTree*& ) const;
virtual bool _Flatten( EvalState&, Value&, ExprTree*&, int* ) const;
int FindExpr( EvalState&, ExprTree*&, ExprTree*&, bool ) const;
ExprTree *expr;
bool absolute;
std::string attributeStr;
};
} // classad
#endif//__CLASSAD_ATTRREFS_H__
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