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/*
* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _PREDICATE_H
#define _PREDICATE_H
#include "expr.h"
#include "scope.h"
namespace ledger {
template <typename T>
class item_predicate
{
public:
expr_t predicate;
item_predicate() {
TRACE_CTOR(item_predicate, "");
}
item_predicate(const item_predicate& other) : predicate(other.predicate) {
TRACE_CTOR(item_predicate, "copy");
}
item_predicate(const expr_t& _predicate) : predicate(_predicate) {
TRACE_CTOR(item_predicate, "const expr_t&");
}
item_predicate(const string& _predicate) : predicate(expr_t(_predicate)) {
TRACE_CTOR(item_predicate, "const string&");
}
~item_predicate() throw() {
TRACE_DTOR(item_predicate);
}
bool operator()(T& item) {
return ! predicate || predicate.calc(item).strip_annotations();
}
};
} // namespace ledger
#endif // _PREDICATE_H
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