46 lines
3.3 KiB
C++
46 lines
3.3 KiB
C++
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// Defines a for each macro utility, with up to 32 elements.
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#define FE_0(FUNC, arg)
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#define FE_1(FUNC, arg, X) FUNC(X, arg)
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#define FE_2(FUNC, arg, X, ...) FUNC(X, arg) FE_1(FUNC, arg, __VA_ARGS__)
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#define FE_3(FUNC, arg, X, ...) FUNC(X, arg) FE_2(FUNC, arg, __VA_ARGS__)
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#define FE_4(FUNC, arg, X, ...) FUNC(X, arg) FE_3(FUNC, arg, __VA_ARGS__)
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#define FE_5(FUNC, arg, X, ...) FUNC(X, arg) FE_4(FUNC, arg, __VA_ARGS__)
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#define FE_6(FUNC, arg, X, ...) FUNC(X, arg) FE_5(FUNC, arg, __VA_ARGS__)
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#define FE_7(FUNC, arg, X, ...) FUNC(X, arg) FE_6(FUNC, arg, __VA_ARGS__)
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#define FE_8(FUNC, arg, X, ...) FUNC(X, arg) FE_7(FUNC, arg, __VA_ARGS__)
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#define FE_9(FUNC, arg, X, ...) FUNC(X, arg) FE_8(FUNC, arg, __VA_ARGS__)
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#define FE_10(FUNC, arg, X, ...) FUNC(X, arg) FE_9(FUNC, arg, __VA_ARGS__)
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#define FE_11(FUNC, arg, X, ...) FUNC(X, arg) FE_10(FUNC, arg, __VA_ARGS__)
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#define FE_12(FUNC, arg, X, ...) FUNC(X, arg) FE_11(FUNC, arg, __VA_ARGS__)
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#define FE_13(FUNC, arg, X, ...) FUNC(X, arg) FE_12(FUNC, arg, __VA_ARGS__)
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#define FE_14(FUNC, arg, X, ...) FUNC(X, arg) FE_13(FUNC, arg, __VA_ARGS__)
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#define FE_15(FUNC, arg, X, ...) FUNC(X, arg) FE_14(FUNC, arg, __VA_ARGS__)
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#define FE_16(FUNC, arg, X, ...) FUNC(X, arg) FE_15(FUNC, arg, __VA_ARGS__)
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#define FE_17(FUNC, arg, X, ...) FUNC(X, arg) FE_16(FUNC, arg, __VA_ARGS__)
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#define FE_18(FUNC, arg, X, ...) FUNC(X, arg) FE_17(FUNC, arg, __VA_ARGS__)
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#define FE_19(FUNC, arg, X, ...) FUNC(X, arg) FE_18(FUNC, arg, __VA_ARGS__)
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#define FE_20(FUNC, arg, X, ...) FUNC(X, arg) FE_19(FUNC, arg, __VA_ARGS__)
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#define FE_21(FUNC, arg, X, ...) FUNC(X, arg) FE_20(FUNC, arg, __VA_ARGS__)
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#define FE_22(FUNC, arg, X, ...) FUNC(X, arg) FE_21(FUNC, arg, __VA_ARGS__)
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#define FE_23(FUNC, arg, X, ...) FUNC(X, arg) FE_22(FUNC, arg, __VA_ARGS__)
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#define FE_24(FUNC, arg, X, ...) FUNC(X, arg) FE_23(FUNC, arg, __VA_ARGS__)
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#define FE_25(FUNC, arg, X, ...) FUNC(X, arg) FE_24(FUNC, arg, __VA_ARGS__)
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#define FE_26(FUNC, arg, X, ...) FUNC(X, arg) FE_25(FUNC, arg, __VA_ARGS__)
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#define FE_27(FUNC, arg, X, ...) FUNC(X, arg) FE_26(FUNC, arg, __VA_ARGS__)
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#define FE_28(FUNC, arg, X, ...) FUNC(X, arg) FE_27(FUNC, arg, __VA_ARGS__)
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#define FE_29(FUNC, arg, X, ...) FUNC(X, arg) FE_28(FUNC, arg, __VA_ARGS__)
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#define FE_30(FUNC, arg, X, ...) FUNC(X, arg) FE_29(FUNC, arg, __VA_ARGS__)
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#define FE_31(FUNC, arg, X, ...) FUNC(X, arg) FE_30(FUNC, arg, __VA_ARGS__)
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#define FE_32(FUNC, arg, X, ...) FUNC(X, arg) FE_31(FUNC, arg, __VA_ARGS__)
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#define FE_33(FUNC, arg, X, ...) THE_FOREACH_MACRO_CURRENTLY_ONLY_SUPPORTS_UP_TO_32_VALUES FE_32(FUNC, arg, __VA_ARGS__)
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#define GET_MACRO(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, \
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_22, _23, _24, _25, _26, _27, _28, _29, _30, _31, _32, _33, NAME, ...) \
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NAME
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#define FOR_EACH(action, arg, ...) \
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GET_MACRO(_0, __VA_ARGS__, FE_33, FE_32, FE_31, FE_30, FE_29, FE_28, FE_27, FE_26, FE_25, FE_24, FE_23, FE_22, \
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FE_21, FE_20, FE_19, FE_18, FE_17, FE_16, FE_15, FE_14, FE_13, FE_12, FE_11, FE_10, FE_9, FE_8, FE_7, \
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FE_6, FE_5, FE_4, FE_3, FE_2, FE_1, FE_0) \
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(action, arg, __VA_ARGS__)
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