e7c3d04309
format all files Revert "format all files" This reverts commit 95d5812e49e7f916b68e786596f5a8eb5bcac414. Revert "format some files" This reverts commit ed3c8762d4d828b2b28e7b18809fc33f4f8ccaf5. format all files fix formatting in dir include fix formatting of debug macro
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_EXPRESSION_STRING_HPP
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#define MAPNIK_EXPRESSION_STRING_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/function_call.hpp>
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#include <mapnik/expression_node_types.hpp>
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// boost
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#include <memory>
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// stl
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#include <string>
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#include <stdexcept>
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namespace mapnik {
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MAPNIK_DECL std::string to_expression_string(expr_node const& node);
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/*
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The following two templates are intentionally invalid and will prompt
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a compile error if ever instantiated. This should prevent accidentally
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passing a pointer (either raw or shared) as the argument. Without them,
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the compiler could construct a temporary expr_node(bool) using
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implicit pointer-to-bool conversion, thus any non-null pointer
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would yield "true".
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*/
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template<typename T>
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std::string to_expression_string(T const* expr_node_ptr)
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{
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throw std::logic_error("to_expression_string() called with pointer argument");
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// compile error intended here; comment on the next line shows in clang output
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return expr_node_ptr; // to_expression_string() called with pointer argument
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}
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template<typename T>
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std::string to_expression_string(std::shared_ptr<T> const& expr_node_ptr)
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{
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throw std::logic_error("to_expression_string() called with pointer argument");
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// compile error intended here; comment on the next line shows in clang output
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return expr_node_ptr; // to_expression_string() called with pointer argument
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}
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} // namespace mapnik
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#endif // MAPNIK_EXPRESSION_STRING_HPP
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