33 lines
794 B
C++
33 lines
794 B
C++
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#include <iostream>
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// compile using std=c++1z-option
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// tested with clang++ and g++
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// using:
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// $CC -Wall -Werror -pedantic -pedantic-errors -std=c++1z -o $OUT $IN
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/* "Old" code:
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* The usage of auto to implicitly get the return type is C++17,
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* the main part is using C++11 variadic templates and overloading
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*/
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auto sum1() { return 0;}
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template<typename T>
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auto sum1(T t) { return t; }
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template<typename T, typename... Ts>
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auto sum1(T t, Ts... ts) {return t + sum1(ts...);}
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/* New code:
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* Using c++17 fold expressions, this gets way shorter and
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* less error prone
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*/
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template <typename... T >
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auto sum2 (T... args){
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return (... + args);
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}
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int main() {
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std::cout << sum1(1,2,3,4,5,6,7,8,9,10) << std::endl;
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std::cout << sum2(1,2,3,4,5,6,7,8,9,10) << std::endl;
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return 0;
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}
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