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  1. #include <iostream>
  2.  
  3. struct Test {
  4.   template <typename T> static bool Function(T x) { return true; }
  5. };
  6.  
  7. // Magical template alias
  8. template <typename T> constexpr auto funky1 = &Test::Function<T>;
  9.  
  10. // lambda means it'll infer the template parameters when calling
  11. auto funky = [](auto in) { return funky1<decltype(in)>(in); };
  12.  
  13. int main() {
  14.   int x = 0;
  15.  
  16.   // Just use the `funky1` version, but you have to specify the template parameters
  17.   std::cout << "string: " << funky1<std::string>("I'm a string") << std::endl
  18.             << "int: " << funky1<int>(42) << std::endl
  19.             << "bool: " << funky1<bool>(true) << std::endl;
  20.  
  21.   // Use the `funky` version, where template parameters are inferred
  22.   std::cout << "string: " << funky("I'm a string") << std::endl
  23.             << "int: " << funky(42) << std::endl
  24.             << "bool: " << funky(true) << std::endl;
  25.  
  26.   return 0;
  27. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin
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Standard input is empty
stdout
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string: 1
int: 1
bool: 1
string: 1
int: 1
bool: 1
https://ideone.com/WCviDs
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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