87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/*
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QUERY-UTIL.hpp - support for working with terms and queries
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Copyright (C) Lumiera.org
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2008, 2012 Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file query-util.hpp
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** Utilities to support working with predicate queries
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*/
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#ifndef LIB_QUERY_UTIL_H
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#define LIB_QUERY_UTIL_H
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#include "lib/symbol.hpp"
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#include "lib/meta/util.hpp"
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#include <typeinfo>
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#include <string>
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namespace lib {
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using lib::Symbol;
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using lib::Literal;
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using std::string;
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namespace query {
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/** ensure standard format for a given id string.
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* Trim, sanitise and ensure the first letter is lower case.
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* @note modifies the given string ref in place
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*/
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void normaliseID (string& id);
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/** count the top-level predicates in the query string.
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* usable for ordering queries, as more predicates usually
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* mean more conditions, i.e. more constriction
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*/
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uint countPred (const string&);
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string extractID (Symbol, string const& termString);
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string removeTerm (Symbol, string& queryString);
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bool hasTerm (Symbol sym, string const& queryString);
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string appendTerms (string const& pred1, string const& pred2);
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template<typename TY>
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const string
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buildTypeID()
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{
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string typeID {util::typeStr<TY>()};
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normaliseID (typeID);
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return typeID;
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}
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}} // namespace lib::query
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#endif
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