199. Lambdas and Callback Management

Question.8

A developer uses templates to accept capturing lambdas without std::function:

template<typename Callback>
void on_event(Callback cb) {
   cb(42);  // Call the callback
}

int offset = 10;
on_event([offset](int val) {
   printf("%d", val + offset); // 52
});

Why is this preferred over std::function in firmware?

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Templates are slower but simpler
The template generates type-specific code at compile time -- no heap allocation, no virtual dispatch, no std::function overhead; the lambda is inlined directly
std::function is not available in C++
Templates cannot accept capturing lambdas

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