bbdab79302
compare compare_items<T> handler item_handler<T> iterators used to iterators sets of journal objects filters derived from item_handler, they morph the result set output derived from item_handler, these do the printing Also, created a new 'help' files which contains just Ledger's help text.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _COMPARE_H
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#define _COMPARE_H
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#include "expr.h"
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#include "xact.h"
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#include "account.h"
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namespace ledger {
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template <typename T>
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class compare_items
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{
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expr_t sort_order;
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compare_items();
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public:
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compare_items(const compare_items& other) : sort_order(other.sort_order) {
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TRACE_CTOR(compare_items, "copy");
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}
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compare_items(const expr_t& _sort_order) : sort_order(_sort_order) {
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TRACE_CTOR(compare_items, "const value_expr&");
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}
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~compare_items() throw() {
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TRACE_DTOR(compare_items);
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}
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bool operator()(T * left, T * right);
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};
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template <typename T>
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bool compare_items<T>::operator()(T * left, T * right)
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{
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assert(left);
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assert(right);
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return sort_order.calc(*left) < sort_order.calc(*right);
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}
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template <>
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bool compare_items<xact_t>::operator()(xact_t * left, xact_t * right);
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template <>
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bool compare_items<account_t>::operator()(account_t * left,
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account_t * right);
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} // namespace ledger
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#endif // _COMPARE_H
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