55. Type Aliases

Question.5

A firmware API has a complex callback signature:

// Without alias:
void register_handler(void (*handler)(const uint8_t*, size_t, int));

// With alias:
using DataHandler = void (*)(const uint8_t*, size_t, int);
void register_handler(DataHandler handler);

What is the primary benefit?

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The aliased version is faster at runtime
The aliased version is more readable and the callback signature is defined once -- changes propagate automatically
The aliased version creates a type-safe wrapper
No benefit -- both are identical to the compiler

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