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Diffstat (limited to 'source/blender/blenlib/BLI_variadic_defines.h')
| -rw-r--r-- | source/blender/blenlib/BLI_variadic_defines.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_variadic_defines.h b/source/blender/blenlib/BLI_variadic_defines.h new file mode 100644 index 00000000000..a2ff8ee09e7 --- /dev/null +++ b/source/blender/blenlib/BLI_variadic_defines.h @@ -0,0 +1,50 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#ifndef __BLI_VARIADIC_DEFINES_H__ +#define __BLI_VARIADIC_DEFINES_H__ + +/** \file BLI_variadic_defines.h + * \ingroup bli + */ + +/* --- internal helpers --- */ +#define _VA_NARGS_GLUE(x, y) x y +#define _VA_NARGS_RETURN_COUNT(\ + _1_, _2_, _3_, _4_, _5_, _6_, _7_, _8_, _9_, _10_, _11_, _12_, _13_, _14_, _15_, _16_, \ + _17_, _18_, _19_, _20_, _21_, _22_, _23_, _24_, _25_, _26_, _27_, _28_, _29_, _30_, _31_, _32_, \ + _33_, _34_, _35_, _36_, _37_, _38_, _39_, _40_, _41_, _42_, _43_, _44_, _45_, _46_, _47_, _48_, \ + _49_, _50_, _51_, _52_, _53_, _54_, _55_, _56_, _57_, _58_, _59_, _60_, _61_, _62_, _63_, _64_, \ + count, ...) count +#define _VA_NARGS_EXPAND(args) _VA_NARGS_RETURN_COUNT args +#define _VA_NARGS_OVERLOAD_MACRO2(name, count) name##count +#define _VA_NARGS_OVERLOAD_MACRO1(name, count) _VA_NARGS_OVERLOAD_MACRO2(name, count) +#define _VA_NARGS_OVERLOAD_MACRO(name, count) _VA_NARGS_OVERLOAD_MACRO1(name, count) +/* --- expose for re-use --- */ +/* 64 args max */ +#define VA_NARGS_COUNT(...) _VA_NARGS_EXPAND((__VA_ARGS__, \ + 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, \ + 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, \ + 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, \ + 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)) +#define VA_NARGS_CALL_OVERLOAD(name, ...) \ + _VA_NARGS_GLUE(_VA_NARGS_OVERLOAD_MACRO(name, VA_NARGS_COUNT(__VA_ARGS__)), (__VA_ARGS__)) + +#endif /* __BLI_VARIADIC_DEFINES_H__ */ |