lst-0065-book.cpp
// https://godbolt.org/z/eaGre4bqr
auto min2(const std::integral auto &a, const std::integral auto &b) {
return a<b ? a : b;
};
auto min3 = []<std::integral T>(const T &a, const T &b, const T &c) {
return min2(a, min2(b,c));
};
int main() {
cout << min3( 3, 7, 2 ) << '\n';
cout << min3( 8.11, 113.2, -3.1 ) << '\n'; // (ERR) Error: not an integral type
}