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diff --git a/predicate.h b/predicate.h
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--- a/predicate.h
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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