175. Template

Question.4

A generic add function needs special handling for chars:

template<typename T>
T add(T a, T b) { return a + b; }

template<>
char add<char>(char a, char b) {
   int r = a + b;
   return (r > 127) ? 127 : (char)r; // Saturate
}

printf("%d", add<char>(100, 50));

What is printed?

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150
127 -- the char specialization saturates at 127 instead of overflowing
-106 -- signed char overflow
Compilation error -- templates cannot be specialized

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