preprocessor.hpp

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#ifndef PREPROCESSOR_HPP_INCLUDED
#define PREPROCESSOR_HPP_INCLUDED
 
#define EMPTY()
#define DEFER(id) id EMPTY()
#define OBSTRUCT(id) id DEFER(EMPTY)()
#define EXPAND(...) __VA_ARGS__
 
#define EVAL(...)  EVAL1(EVAL1(EVAL1(__VA_ARGS__)))
#define EVAL1(...) EVAL2(EVAL2(EVAL2(__VA_ARGS__)))
#define EVAL2(...) EVAL3(EVAL3(EVAL3(__VA_ARGS__)))
#define EVAL3(...) EVAL4(EVAL4(EVAL4(__VA_ARGS__)))
#define EVAL4(...) EVAL5(EVAL5(EVAL5(__VA_ARGS__)))
#define EVAL5(...) __VA_ARGS__
 
#define CAT(a, ...) PRIMITIVE_CAT(a, __VA_ARGS__)
#define PRIMITIVE_CAT(a, ...) a ## __VA_ARGS__
 
#define CHECK_N(x, n, ...) n
#define CHECK(...) CHECK_N(__VA_ARGS__, 0,)
 
#define NOT(x) CHECK(PRIMITIVE_CAT(NOT_, x))
#define NOT_0 ~, 1,
 
#define COMPL(b) PRIMITIVE_CAT(COMPL_, b)
#define COMPL_0 1
#define COMPL_1 0
 
#define BOOL(x) COMPL(NOT(x))
 
#define IIF(c) PRIMITIVE_CAT(IIF_, c)
#define IIF_0(t, ...) __VA_ARGS__
#define IIF_1(t, ...) t
 
#define IF(c) IIF(BOOL(c))
 
#define WHILE(pred, op, cont, ...) \
    IF(pred(__VA_ARGS__)) \
    ( \
        op(__VA_ARGS__) \
        OBSTRUCT(WHILE_INDIRECT) () \
        ( \
            pred, op, cont, cont(__VA_ARGS__) \
        ) \
    )
#define WHILE_INDIRECT() WHILE
 
#define IS_0(x) CHECK(PRIMITIVE_CAT(IS_0_, x))
#define IS_0_0 ~, 1,
 
#define IS_1(x) CHECK(PRIMITIVE_CAT(IS_1_, x))
#define IS_1_1 ~, 1,
 
#define IIF_ELSE_2(c) PRIMITIVE_CAT(IIF_ELSE_2_, c)
#define IIF_ELSE_2_0(t1, t2, f1, f2, ...) f1, f2
#define IIF_ELSE_2_1(t1, t2, f1, f2, ...) t1, t2
 
#define IF_ELSE_2(c) IIF_ELSE_2(BOOL(c))
 
# define DEC(x) PRIMITIVE_CAT(DEC_, x)
# define DEC_0 0
# define DEC_1 0
# define DEC_2 1
# define DEC_3 2
# define DEC_4 3
# define DEC_5 4
# define DEC_6 5
# define DEC_7 6
# define DEC_8 7
# define DEC_9 8
# define DEC_10 9
# define DEC_11 10
# define DEC_12 11
# define DEC_13 12
# define DEC_14 13
# define DEC_15 14
# define DEC_16 15
# define DEC_17 16
# define DEC_18 17
# define DEC_19 18
# define DEC_20 19
# define DEC_21 20
# define DEC_22 21
# define DEC_23 22
# define DEC_24 23
# define DEC_25 24
# define DEC_26 25
# define DEC_27 26
# define DEC_28 27
# define DEC_29 28
# define DEC_30 29
# define DEC_31 30
# define DEC_32 31
# define DEC_33 32
# define DEC_34 33
# define DEC_35 34
# define DEC_36 35
# define DEC_37 36
# define DEC_38 37
# define DEC_39 38
# define DEC_40 39
# define DEC_41 40
# define DEC_42 41
# define DEC_43 42
# define DEC_44 43
# define DEC_45 44
# define DEC_46 45
# define DEC_47 46
# define DEC_48 47
# define DEC_49 48
# define DEC_50 49
# define DEC_51 50
# define DEC_52 51
# define DEC_53 52
# define DEC_54 53
# define DEC_55 54
# define DEC_56 55
# define DEC_57 56
# define DEC_58 57
# define DEC_59 58
# define DEC_60 59
# define DEC_61 60
# define DEC_62 61
# define DEC_63 62
# define DEC_64 63
# define DEC_65 64
# define DEC_66 65
# define DEC_67 66
# define DEC_68 67
# define DEC_69 68
# define DEC_70 69
# define DEC_71 70
# define DEC_72 71
# define DEC_73 72
# define DEC_74 73
# define DEC_75 74
# define DEC_76 75
# define DEC_77 76
# define DEC_78 77
# define DEC_79 78
# define DEC_80 79
# define DEC_81 80
# define DEC_82 81
# define DEC_83 82
# define DEC_84 83
# define DEC_85 84
# define DEC_86 85
# define DEC_87 86
# define DEC_88 87
# define DEC_89 88
# define DEC_90 89
# define DEC_91 90
# define DEC_92 91
# define DEC_93 92
# define DEC_94 93
# define DEC_95 94
# define DEC_96 95
# define DEC_97 96
# define DEC_98 97
# define DEC_99 98
# define DEC_100 99
# define DEC_101 100
# define DEC_102 101
# define DEC_103 102
# define DEC_104 103
# define DEC_105 104
# define DEC_106 105
# define DEC_107 106
# define DEC_108 107
# define DEC_109 108
# define DEC_110 109
# define DEC_111 110
# define DEC_112 111
# define DEC_113 112
# define DEC_114 113
# define DEC_115 114
# define DEC_116 115
# define DEC_117 116
# define DEC_118 117
# define DEC_119 118
# define DEC_120 119
# define DEC_121 120
# define DEC_122 121
# define DEC_123 122
# define DEC_124 123
# define DEC_125 124
# define DEC_126 125
# define DEC_127 126
# define DEC_128 127
# define DEC_129 128
# define DEC_130 129
# define DEC_131 130
# define DEC_132 131
# define DEC_133 132
# define DEC_134 133
# define DEC_135 134
# define DEC_136 135
# define DEC_137 136
# define DEC_138 137
# define DEC_139 138
# define DEC_140 139
# define DEC_141 140
# define DEC_142 141
# define DEC_143 142
# define DEC_144 143
# define DEC_145 144
# define DEC_146 145
# define DEC_147 146
# define DEC_148 147
# define DEC_149 148
# define DEC_150 149
# define DEC_151 150
# define DEC_152 151
# define DEC_153 152
# define DEC_154 153
# define DEC_155 154
# define DEC_156 155
# define DEC_157 156
# define DEC_158 157
# define DEC_159 158
# define DEC_160 159
# define DEC_161 160
# define DEC_162 161
# define DEC_163 162
# define DEC_164 163
# define DEC_165 164
# define DEC_166 165
# define DEC_167 166
# define DEC_168 167
# define DEC_169 168
# define DEC_170 169
# define DEC_171 170
# define DEC_172 171
# define DEC_173 172
# define DEC_174 173
# define DEC_175 174
# define DEC_176 175
# define DEC_177 176
# define DEC_178 177
# define DEC_179 178
# define DEC_180 179
# define DEC_181 180
# define DEC_182 181
# define DEC_183 182
# define DEC_184 183
# define DEC_185 184
# define DEC_186 185
# define DEC_187 186
# define DEC_188 187
# define DEC_189 188
# define DEC_190 189
# define DEC_191 190
# define DEC_192 191
# define DEC_193 192
# define DEC_194 193
# define DEC_195 194
# define DEC_196 195
# define DEC_197 196
# define DEC_198 197
# define DEC_199 198
# define DEC_200 199
# define DEC_201 200
# define DEC_202 201
# define DEC_203 202
# define DEC_204 203
# define DEC_205 204
# define DEC_206 205
# define DEC_207 206
# define DEC_208 207
# define DEC_209 208
# define DEC_210 209
# define DEC_211 210
# define DEC_212 211
# define DEC_213 212
# define DEC_214 213
# define DEC_215 214
# define DEC_216 215
# define DEC_217 216
# define DEC_218 217
# define DEC_219 218
# define DEC_220 219
# define DEC_221 220
# define DEC_222 221
# define DEC_223 222
# define DEC_224 223
# define DEC_225 224
# define DEC_226 225
# define DEC_227 226
# define DEC_228 227
# define DEC_229 228
# define DEC_230 229
# define DEC_231 230
# define DEC_232 231
# define DEC_233 232
# define DEC_234 233
# define DEC_235 234
# define DEC_236 235
# define DEC_237 236
# define DEC_238 237
# define DEC_239 238
# define DEC_240 239
# define DEC_241 240
# define DEC_242 241
# define DEC_243 242
# define DEC_244 243
# define DEC_245 244
# define DEC_246 245
# define DEC_247 246
# define DEC_248 247
# define DEC_249 248
# define DEC_250 249
# define DEC_251 250
# define DEC_252 251
# define DEC_253 252
# define DEC_254 253
# define DEC_255 254
# define DEC_256 255
# define DEC_257 256
 
#endif