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include <iostream>
include <cstdint>
 
union P {
    timeval _timeval;
    int8_t  _int8_t;
    uint8_t _uint8_t;
 
    operator const timeval() const {
        return _timeval;
    }
 
    operator const int8_t() const {
        return _int8_t;
    }
};
 
 
struct Y {
 
    operator const int8_t() const {
        return static_cast<int8_t>(_p);
    }
 
    operator const timeval() const {
        return static_cast<timeval>(_p);
    }
 
    P _p;
};
 
int main()
{
 
    Y testobj();
    timeval ret = static_cast<timeval>(testobj);
    return 0;
}

prog.cpp:1:1: error: ‘include’ does not name a type
 include <iostream>
 ^
prog.cpp:21:20: error: ISO C++ forbids declaration of ‘type name’ with no type [-fpermissive]
     operator const int8_t() const {
                    ^
prog.cpp:21:5: error: ‘operator const int’ does not name a type
     operator const int8_t() const {
     ^
prog.cpp:25:20: error: ISO C++ forbids declaration of ‘type name’ with no type [-fpermissive]
     operator const timeval() const {
                    ^
prog.cpp:25:5: error: ‘operator const int’ does not name a type
     operator const timeval() const {
     ^
prog.cpp:29:5: error: ‘P’ does not name a type
     P _p;
     ^
prog.cpp: In function ‘int main()’:
prog.cpp:36:5: error: ‘timeval’ was not declared in this scope
     timeval ret = static_cast<timeval>(testobj);
     ^
prog.cpp:36:13: error: expected ‘;’ before ‘ret’
     timeval ret = static_cast<timeval>(testobj);
             ^

Standard output is empty