How to check the data type of a variable at compile time?

[EUoNwbRD]

I want to use `constexpr` to check data types at compile time. The code is the following:

namespace toml {
  toml_table_t* parse(auto data) {
    if constexpr(typeid(data) == typeid(FILE*)) {
      return toml_parse_file(data);
    } else if constexpr(typeid(data) == typeid(char*)) {
      return toml_parse(data);
    }
  }
}

I want to check the data type of "data" for every function (template) call. When I'm running the following code, I'm getting a big error message (classic C++) but the highlights is: call to non-‘constexpr’ function ‘bool std::type_info::operator==(const std::type_info&) const’

So is there a way to do that without get the error?

[mbozzi]

Use std::same_as or std::is_same_v
https://en.cppreference.com/w/cpp/concepts/same_as
https://en.cppreference.com/w/cpp/types/is_same

Scroll down on the linked reference pages for examples

You could also use simple function overloading to make this choice.

[EUoNwbRD]

You could also use simple function overloading to make this choice.

Man, I swear, I had forget about function overloading and in this case it makes sense. Thanks a lot for your help man! Have an amazing day!