Add DEFINE_ENUM_CONVERT macro for defining PBD::string_to/to_string for enums
A simple macro for defining the four template specializations required to convert an enum to a string and back using the existing string_2_enum and enum_2_string functions. Generally these will only be instantiated in one source file, I don't think it is necessary to explicitly instantiate any at this stage.
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libs/pbd/pbd/enum_convert.h
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libs/pbd/pbd/enum_convert.h
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/*
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Copyright (C) 2015 Tim Mayberry
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(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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#ifndef PBD_ENUM_CONVERT_H
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#define PBD_ENUM_CONVERT_H
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#include "pbd/enumwriter.h"
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#include "pbd/string_convert.h"
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#define TO_STRING_FULL(Type) \
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template <> \
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inline bool to_string (Type val, std::string& str) \
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{ \
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str = enum_2_string (val); \
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return true; \
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}
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#define STRING_TO_FULL(Type) \
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template <> \
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inline bool string_to (const std::string& str, Type& val) \
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{ \
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val = (Type)string_2_enum (str, val); \
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return true; \
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}
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#define TO_STRING(Type) \
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template<> inline std::string to_string (Type val) \
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{ return enum_2_string (val); }
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#define STRING_TO(Type) \
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template<> inline Type string_to (const std::string& str) \
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{ Type val; return (Type) string_2_enum (str, val); }
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#define DEFINE_ENUM_CONVERT(Type) \
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TO_STRING_FULL (Type) \
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STRING_TO_FULL (Type) \
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TO_STRING (Type) \
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STRING_TO (Type)
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#endif // PBD_ENUM_CONVERT_H
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