deduction.cpp

struct Fluent
{
    template <typename T>
    using Callback = std::function<void(T)>;

    template <typename T>
    Fluent& doSomething(Callback<T> const& t)
    {
        return *this;
    }
};

int main(int argc, char** argv)
{
    Fluent fluent;
    fluent
        .doSomething([](int t)
        {
        })
        .doSomething([](float t)
        {
        });

    return 0;
}