Непонятная ошибка в конструкторе

#include <iostream>
 
 
 
template<typename T1, typename T2>
class base
{
 
private:
 
    T1 value1;
 
    T2 value2;
 
public:
 
    base(T1 valueOne, T2 valueSecond) :value1{ valueOne }, value2{ valueSecond }{}
 
    void setValue1(T1 value) { value1 = value; }
 
    void setValue2(T2 value) { value2 = value; }
 
    T1& getValue1() { return value1; }
 
    T2& getValue2() { return value2; }
 
};
 
 
 
template<class T1, class T2,class T3,class T4>
class child : public base<T1, T2>
{
 
private:
 
    T3 value3;
 
    T4 value4;
 
public:
 
    child(T1 valueOne, T2 valueSecond, T3 valueThird, T4 valueForth) :base{ valueOne,valueSecond }, value3{ valueThird }, value4{ valueForth }{}
 
    void trySetValue1(T1 value) { this->setValue1(value); }
 
    void trySetValue2(T2 value) { this->setValue2(value); }
 
    void setValue3(T3 value) { value3 = value; }
 
    void setValue4(T4 value) { value4 = value; }
 
    T1& tryGetValue1() { return this->getValue1(); }
 
    T2& tryGetValue2() { return this->getValue2(); }
 
    T3& getValue3() { return value3; }
 
    T4& getValue4() { return value4; }
 
};
 
template<class T1,class T2,class T3,class T4,class T5,class T6>
class child2 :public child<T1,T2,T3,T4>
{
private:
 
    T5 value5;
 
    T6 value6;
 
public:
 
    child2(T1 value1, T2 value2, T3 value3, T4 value4, T5 value5, T6 value6) :child { value1, value2, value3, value4 }, value5{ value5 }, value6{ value6 } {}
 
    void tryTrySetValue1(T1 value) { this->trySetValue1(value); }
 
    void tryTrySetValue2(T2 value) { this->trySetValue2(value); }
 
    void trySetValue3(T3 value) { this->setValue3(value); }
 
    void trySetValue4(T4 value) { this->setValue4(value); }
 
    void setValue5(T5 value) { value5 = value; }
 
    void setValue6(T6 value) { value6 = value; }
 
    T1& tryTryGetValue1() { return this->tryGetValue1(); }
 
    T2& tryTryGetValue2() { return this->tryGetValue2(); }
 
    T3& tryGetValue3() { return this->getValue3(); }
 
    T4& tryGetValue4() { return this->getValue4(); }
 
    T5& getValue5() { return value5; }
 
    T6& getValue6() { return value6; }
 
};
 
 
 
int main()
{
    base<int, double> baseType{ 1,5.5 };
    child<int, double, char, int>{2, 6.6, 'a', 100};
    child2<int,double,char,int,float,float>{8, 3.3, 'b',6,85.9,99.9};
}

    child(T1 valueOne, T2 valueSecond, T3 valueThird, T4 valueForth) 
                      :base<T1,T2>{ valueOne,valueSecond }, value3{ valueThird }, value4{ valueForth }{}

    child2(T1 value1, T2 value2, T3 value3, T4 value4, T5 value5, T6 value6) 
                    :child<T1, T2, T3, T4>{ value1, value2, value3, value4 }, value5{ value5 }, value6{ value6 } {}