199. Lambdas and Callback Management

Question.2

A captureless lambda is passed to a C-style callback API:

void register_irq(void (*cb)(int));  // C API

register_irq([](int code) {
   log_error(code);
});

Why does this work even though the API expects a raw function pointer?

Need Help? Refer to the Quick Guide below

All lambdas are function pointers
A lambda with empty captures [] has no state -- the compiler can convert it to a plain function pointer; it is identical to a regular C function
The compiler wraps the lambda in std::function automatically
register_irq is overloaded for lambdas

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