C++: "no instance of constructor "std::tuple<_T1, _T2>::tuple [with _T1=void (*)(Effect e), _T2=int]" matches the argument list"

Question

I can't figure out what the error here means, nor the constructor it would be referencing.

void generateEffect(Effect e){
    static const map<string, void (*)(Effect e, vector<variant<int>> setUpData)> dataDict = {
        {
            "String", [](Effect e, vector<variant<int>> setUpData){
            e.data = {0};
            e.onUpdate.push_back(tuple <void (*)(Effect e), int>
            {//<- Error is here
                [&setUpData](Effect e){
                var = get<int>(setUpData[0]);
                }, 1});
            }
        }
    };
};

When I change the code to not include the setUpData capture, i.e.

e.onUpdate.push_back(tuple <void (*)(Effect e), int>
            {
                [](Effect e){}, 5});
            }

the error goes away. What should I do?

please post a [mre] that we can copy paste in our compilers and see the exact same issue. — bolov, Jul 06 '22 at 00:55
Oh sorry, the only relevant missing part should be ``` class Effect{ vector> data; vector> onUpdate; } ``` — Psdnmstr, Jul 06 '22 at 01:02
Capturing lambdas cannot be converted to free function pointers. Use `std::function` instead. — Raymond Chen, Jul 06 '22 at 01:03
Does this answer your question?: [Passing capturing lambda as function pointer](https://stackoverflow.com/q/28746744/1458097) — heap underrun, Jul 06 '22 at 01:19

C++: "no instance of constructor "std::tuple<_T1, _T2>::tuple [with _T1=void (*)(Effect e), _T2=int]" matches the argument list"

0 Answers0