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Convert exception to optional: cant resolve overloaded function type


Convert exception to optional: cant resolve overloaded function type

By : user2949685
Date : November 17 2020, 01:00 AM
Hope this helps The problem here is with template type deduction, and is one of the perfect forwarding failures. When you have an overloaded function, which one of them is supposed to be deduced for Func?
There are two ways around this. Either, create a function pointer of the correct type and pass it in, or just cast to_string to that type:
code :
using FuncType = std::string(*)(int );
FuncType f = std::to_string;

auto n = get_opt(f, 1234); 
auto n2 = get_opt(static_cast<FuncType>(std::to_string), 1234);


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overloaded function with no contextual type information | cannot resolve overloaded function 'swap' based on conversion

overloaded function with no contextual type information | cannot resolve overloaded function 'swap' based on conversion


By : that1guy
Date : March 29 2020, 07:55 AM
Hope this helps I am trying to write my own bubble sort algorithm as an exercise. I do not understand the two error messages. Can anyone point out the problem with my code? , I see that you are using
code :
using namespace std;
array[i] = swap;
How do I resolve this <unresolved overloaded function type> error when using std::function?

How do I resolve this <unresolved overloaded function type> error when using std::function?


By : Benjamin Barbre
Date : March 29 2020, 07:55 AM
I wish this helpful for you The error tells you that there are two potential overloads that could be used, and the compiler cannot decide for you. On the other hand, you can determine which one to use by using a cast:
code :
typedef const char *(*func_ptr)( shader::FUNC );
register_enum< shader::FUNC >( L, "functions", (func_ptr)shader::to_cstring );
register_enum< shader::FUNC >( L, "functions", 
             (const char *(*)( shader::FUNC ))shader::to_cstring );
Passing null to overloaded methods in java | variables of overloaded are Exception type

Passing null to overloaded methods in java | variables of overloaded are Exception type


By : richard
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Your answer to 1 is correct. Given the choice where two or more overloads are candidate, and one of them is more specific than all of the others, the most specific one is chosen.
The JLS says this (Section 15.12.2.5):
code :
public class NullPassing {
    public static void main(String[] args) {
        method1(null);
    }
    public static void method1(Exception e) {
        System.out.println(e);
    }
    public static void method1(ArithmeticException e) {
        System.out.println(e);
    }
    public static void method1(NullPointerException e) {
        System.out.println(e);
    }  
}
  method1((NullPointerException)null)
Resolve <unresolved overloaded function type> in std::async call

Resolve <unresolved overloaded function type> in std::async call


By : Bear13yte
Date : March 29 2020, 07:55 AM
will help you std::lower_bound is a function template, you have to explicitly specify its arguments to be able to pass it around:
code :
int main() {
  using V = std::vector<int>;
  V v = {1,3,4,6,7};
  auto res = std::async(std::launch::async, std::lower_bound<V::iterator, int>, v.begin(), v.end(), 4);
  std::cout << *res.get() << std::endl;
  return 0;
}
error C2440: 'type cast' : cannot convert from 'overloaded-function' to 'HOOKPROC'

error C2440: 'type cast' : cannot convert from 'overloaded-function' to 'HOOKPROC'


By : Sherri
Date : March 29 2020, 07:55 AM
With these it helps WinAPI is mostly a C programming interface, so it doesn't know about classes. The callback should be static:
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