Open3D (C++ API)
PluginMacros.h
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4 // The MIT License (MIT)
5 //
6 // Copyright (c) 2018 www.open3d.org
7 //
8 // Permission is hereby granted, free of charge, to any person obtaining a copy
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24 // IN THE SOFTWARE.
25 // ----------------------------------------------------------------------------
26 
27 #pragma once
28 
29 // clang-format off
30 #define ARGS_1(a1, ...) a1
31 #define ARGS_2(a1, a2, ...) a2
32 #define ARGS_3(a1, a2, a3, ...) a3
33 #define ARGS_4(a1, a2, a3, a4, ...) a4
34 #define ARGS_5(a1, a2, a3, a4, a5, ...) a5
35 #define ARGS_6(a1, a2, a3, a4, a5, a6, ...) a6
36 #define ARGS_7(a1, a2, a3, a4, a5, a6, a7, ...) a7
37 #define ARGS_8(a1, a2, a3, a4, a5, a6, a7, a8, ...) a8
38 #define ARGS_9(a1, a2, a3, a4, a5, a6, a7, a8, a9, ...) a9
39 #define ARGS_10(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, ...) a10
40 #define ARGS_11(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, ...) a11
41 #define ARGS_12(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, ...) a12
42 #define ARGS_13(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, ...) a13
43 #define ARGS_14(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, ...) a14
44 #define ARGS_15(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, ...) a15
45 #define ARGS_16(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, ...) a16
46 #define ARGS_17(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, ...) a17
47 #define ARGS_18(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, ...) a18
48 #define ARGS_19(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, ...) a19
49 #define ARGS_20(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, ...) a20
50 #define ARGS_21(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, ...) a21
51 // clang-format on
52 
53 #define EXPAND(x) x // MSVC fix
54 
55 // Count __VA_ARGS__ for MSVC https://stackoverflow.com/a/26685339/1255535
56 #ifdef _MSC_VER
57 
58 #define __NARGS(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, \
59  _15, _16, _17, _18, _19, _20, _21, VAL, ...) \
60  VAL
61 #define NARGS_1(...) \
62  EXPAND(__NARGS(__VA_ARGS__, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, \
63  8, 7, 6, 5, 4, 3, 2, 1, 0))
64 #define AUGMENTER(...) unused, __VA_ARGS__
65 #define COUNT_ARGS(...) NARGS_1(AUGMENTER(__VA_ARGS__))
66 
67 #else
68 #define COUNT_ARGS(...) \
69  __NARGS(0, ##__VA_ARGS__, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, \
70  9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
71 #define __NARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, \
72  _14, _15, _16, _17, _18, _19, _20, _21, N, ...) \
73  N
74 
75 #endif
76 
77 // Convert to list of "arg_type arg_name"
78 // Converts:
79 // float, a1, int, a2, short, a3, double, a4
80 // To:
81 // float a1, int a2, short a3, double a4
82 // clang-format off
83 #define EXTRACT_TYPES_PARAMS_0(...)
84 
85 // Workaround: with older compilers ##__VA_ARGS__ may not eliminate unnecessary
86 // comma when __VA_ARGS__ is empty.
87 // In this case, COUNT_ARGS() will be 1 where it should be 0.
88 #define EXTRACT_TYPES_PARAMS_1(...)
89 
90 #define EXTRACT_TYPES_PARAMS_2(...) \
91  EXPAND(ARGS_1(__VA_ARGS__)) EXPAND(ARGS_2(__VA_ARGS__))
92 
93 #define EXTRACT_TYPES_PARAMS_4(...) \
94  EXPAND(ARGS_1(__VA_ARGS__)) EXPAND(ARGS_2(__VA_ARGS__)), \
95  EXPAND(ARGS_3(__VA_ARGS__)) EXPAND(ARGS_4(__VA_ARGS__))
96 
97 #define EXTRACT_TYPES_PARAMS_6(...) \
98  EXPAND(ARGS_1(__VA_ARGS__)) EXPAND(ARGS_2(__VA_ARGS__)), \
99  EXPAND(ARGS_3(__VA_ARGS__)) EXPAND(ARGS_4(__VA_ARGS__)), \
100  EXPAND(ARGS_5(__VA_ARGS__)) EXPAND(ARGS_6(__VA_ARGS__))
101 
102 #define EXTRACT_TYPES_PARAMS_8(...) \
103  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
104  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
105  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
106  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__))
107 
108 #define EXTRACT_TYPES_PARAMS_10(...) \
109  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
110  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
111  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
112  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
113  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__))
114 
115 #define EXTRACT_TYPES_PARAMS_12(...) \
116  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
117  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
118  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
119  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
120  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__)), \
121  EXPAND(ARGS_11(__VA_ARGS__)) EXPAND(ARGS_12(__VA_ARGS__))
122 
123 #define EXTRACT_TYPES_PARAMS_14(...) \
124  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
125  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
126  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
127  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
128  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__)), \
129  EXPAND(ARGS_11(__VA_ARGS__)) EXPAND(ARGS_12(__VA_ARGS__)), \
130  EXPAND(ARGS_13(__VA_ARGS__)) EXPAND(ARGS_14(__VA_ARGS__))
131 
132 #define EXTRACT_TYPES_PARAMS_16(...) \
133  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
134  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
135  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
136  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
137  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__)), \
138  EXPAND(ARGS_11(__VA_ARGS__)) EXPAND(ARGS_12(__VA_ARGS__)), \
139  EXPAND(ARGS_13(__VA_ARGS__)) EXPAND(ARGS_14(__VA_ARGS__)), \
140  EXPAND(ARGS_15(__VA_ARGS__)) EXPAND(ARGS_16(__VA_ARGS__))
141 
142 #define EXTRACT_TYPES_PARAMS_18(...) \
143  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
144  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
145  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
146  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
147  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__)), \
148  EXPAND(ARGS_11(__VA_ARGS__)) EXPAND(ARGS_12(__VA_ARGS__)), \
149  EXPAND(ARGS_13(__VA_ARGS__)) EXPAND(ARGS_14(__VA_ARGS__)), \
150  EXPAND(ARGS_15(__VA_ARGS__)) EXPAND(ARGS_16(__VA_ARGS__)), \
151  EXPAND(ARGS_17(__VA_ARGS__)) EXPAND(ARGS_18(__VA_ARGS__))
152 
153 #define EXTRACT_TYPES_PARAMS_20(...) \
154  EXPAND(ARGS_1 (__VA_ARGS__)) EXPAND(ARGS_2 (__VA_ARGS__)), \
155  EXPAND(ARGS_3 (__VA_ARGS__)) EXPAND(ARGS_4 (__VA_ARGS__)), \
156  EXPAND(ARGS_5 (__VA_ARGS__)) EXPAND(ARGS_6 (__VA_ARGS__)), \
157  EXPAND(ARGS_7 (__VA_ARGS__)) EXPAND(ARGS_8 (__VA_ARGS__)), \
158  EXPAND(ARGS_9 (__VA_ARGS__)) EXPAND(ARGS_10(__VA_ARGS__)), \
159  EXPAND(ARGS_11(__VA_ARGS__)) EXPAND(ARGS_12(__VA_ARGS__)), \
160  EXPAND(ARGS_13(__VA_ARGS__)) EXPAND(ARGS_14(__VA_ARGS__)), \
161  EXPAND(ARGS_15(__VA_ARGS__)) EXPAND(ARGS_16(__VA_ARGS__)), \
162  EXPAND(ARGS_17(__VA_ARGS__)) EXPAND(ARGS_18(__VA_ARGS__)), \
163  EXPAND(ARGS_19(__VA_ARGS__)) EXPAND(ARGS_20(__VA_ARGS__))
164 // clang-format on
165 
166 // Convert to list of "arg_type arg_name" caller
167 #define EXTRACT_TYPES_PARAMS(num_args, ...) \
168  EXTRACT_TYPES_PARAMS_##num_args(__VA_ARGS__)
169 
170 // Convert to list of "arg_name"
171 // Converts:
172 // float, a1, int, a2, short, a3, double, a4
173 // To:
174 // a1, a2, a3, a4
175 // clang-format off
176 #define EXTRACT_PARAMS_0(...)
177 
178 // Workaround: with older compilers ##__VA_ARGS__ may not eliminate unnecessary
179 // comma when __VA_ARGS__ is empty.
180 // In this case, COUNT_ARGS() will be 1 where it should be 0.
181 #define EXTRACT_PARAMS_1(...)
182 
183 #define EXTRACT_PARAMS_2(...) \
184  EXPAND(ARGS_2(__VA_ARGS__))
185 
186 #define EXTRACT_PARAMS_4(...) \
187  EXPAND(ARGS_2(__VA_ARGS__)), EXPAND(ARGS_4(__VA_ARGS__))
188 
189 #define EXTRACT_PARAMS_6(...) \
190  EXPAND(ARGS_2(__VA_ARGS__)), EXPAND(ARGS_4(__VA_ARGS__)), \
191  EXPAND(ARGS_6(__VA_ARGS__))
192 
193 #define EXTRACT_PARAMS_8(...) \
194  EXPAND(ARGS_2(__VA_ARGS__)), EXPAND(ARGS_4(__VA_ARGS__)), \
195  EXPAND(ARGS_6(__VA_ARGS__)), EXPAND(ARGS_8(__VA_ARGS__))
196 
197 #define EXTRACT_PARAMS_10(...) \
198  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
199  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
200  EXPAND(ARGS_10(__VA_ARGS__))
201 
202 #define EXTRACT_PARAMS_12(...) \
203  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
204  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
205  EXPAND(ARGS_10(__VA_ARGS__)), EXPAND(ARGS_12(__VA_ARGS__))
206 
207 #define EXTRACT_PARAMS_14(...) \
208  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
209  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
210  EXPAND(ARGS_10(__VA_ARGS__)), EXPAND(ARGS_12(__VA_ARGS__)), \
211  EXPAND(ARGS_14(__VA_ARGS__))
212 
213 #define EXTRACT_PARAMS_16(...) \
214  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
215  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
216  EXPAND(ARGS_10(__VA_ARGS__)), EXPAND(ARGS_12(__VA_ARGS__)), \
217  EXPAND(ARGS_14(__VA_ARGS__)), EXPAND(ARGS_16(__VA_ARGS__))
218 
219 #define EXTRACT_PARAMS_18(...) \
220  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
221  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
222  EXPAND(ARGS_10(__VA_ARGS__)), EXPAND(ARGS_12(__VA_ARGS__)), \
223  EXPAND(ARGS_14(__VA_ARGS__)), EXPAND(ARGS_16(__VA_ARGS__)), \
224  EXPAND(ARGS_18(__VA_ARGS__))
225 
226 #define EXTRACT_PARAMS_20(...) \
227  EXPAND(ARGS_2 (__VA_ARGS__)), EXPAND(ARGS_4 (__VA_ARGS__)), \
228  EXPAND(ARGS_6 (__VA_ARGS__)), EXPAND(ARGS_8 (__VA_ARGS__)), \
229  EXPAND(ARGS_10(__VA_ARGS__)), EXPAND(ARGS_12(__VA_ARGS__)), \
230  EXPAND(ARGS_14(__VA_ARGS__)), EXPAND(ARGS_16(__VA_ARGS__)), \
231  EXPAND(ARGS_18(__VA_ARGS__)), EXPAND(ARGS_20(__VA_ARGS__))
232 // clang-format on
233 
234 // Convert to list of "arg_name" caller
235 #define EXTRACT_PARAMS(num_args, ...) EXTRACT_PARAMS_##num_args(__VA_ARGS__)
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