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c++aliastypedefusing

How to use the "using" keyword to define a function prototype/signature

In my efforts to port my C++ code to better (and more consistent) use of "Modern C++," my latest round of changes involves replacing typedef int32_t I2Arr[2] aliasing to the more modern using I2Arr = int32_t[2] style. This works fine for 'simple' (scalar) types, and is especially useful for defining function pointers:

using IFunc = int32_t(*)(int32_t, int32_t);

looks so much clearer (IMHO) than:

typedef int32_t(IFunc*)(int32_t, int32_t);

However, I've just become a bit stuck with replacing a typedef for an actual function prototype (not a pointer-to-function). For example, I have the following code, using the 'old-style':

typedef int32_t MaskMaker(int32_t, const uint8_t *, uint8_t *);
static MaskMaker *maskMakers[maskNum];

Now, maybe (probably) I'm being really dim here, but I just can't figure out a way to convert this to the using style of aliasing. Can anyone show me how to do this?

Solution 
  • using MaskMaker = int32_t(int32_t, const uint8_t *, uint8_t *);

    That's it, really.