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// PR c++/4377
template < int I1, int I2 >
class unit
{
public:
typedef unit<I1,I2> my_type;
unit() {}
unit( const unit<I1,I2>& ) {}
template< int Q1, int Q2 >
unit< I1 + Q1, I2 + Q2 > operator * ( const unit< Q1, Q2 >& rhs ) const {
return unit< I1 + Q1, I2 + Q2 >();
}
template< int Q1, int Q2 >
unit< I1 - Q1, I2 - Q2 > operator / ( const unit< Q1, Q2 >& rhs ) const {
return unit< I1 - Q1, I2 - Q2 >();
}
};
// specialization added to first test
//
template <>
class unit<0,0> {
public:
typedef unit<0,0> my_type;
unit() {}
friend unit<0,0> operator*( const unit<0,0>& lhs, const unit<0,0>& rhs ) {
return unit<0,0>();
}
friend unit<0,0> operator/( const unit<0,0>& lhs, const unit<0,0>& rhs ) {
return unit<0,0>();
}
};
int main()
{
const unit<1,0> u1;
const unit<2,0> u2;
unit<-1,0> u3( u1 / u2 );
unit< 3,0> u4( u1 * u2 );
}
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