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#include <string>
#include <iostream>
// Minimal class path
class path
{
public:
path( const char * )
{
std::cout << "path( const char * )\n";
}
path( const std::string & )
{
std::cout << "path( std::string & )\n";
}
// for maximum efficiency, either signature must work
# ifdef BY_VALUE
operator const std::string() const
# else
operator const std::string&() const
# endif
{
std::cout << "operator string\n";
return m_path;
}
#ifdef NAMED_CONVERSION
std::string string() const
{
std::cout << "std::string string() const\n";
return m_path;
}
#endif
private:
std::string m_path;
};
bool operator==( const path &, const path & )
{
std::cout << "operator==( const path &, const path & )\n";
return true;
}
// These are the critical use cases. If any of these don't compile, usability
// is unacceptably degraded.
void f( const path & )
{
std::cout << "f( const path & )\n";
}
int main()
{
f( "foo" );
f( std::string( "foo" ) );
f( path( "foo" ) );
std::cout << '\n';
std::string s1( path( "foo" ) );
std::string s2 = path( "foo" );
s2 = path( "foo" );
#ifdef NAMED_CONVERSION
s2 = path( "foo" ).string();
#endif
std::cout << '\n';
// these must call bool path( const path &, const path & );
path( "foo" ) == path( "foo" );
path( "foo" ) == "foo";
path( "foo" ) == std::string( "foo" );
"foo" == path( "foo" );
std::string( "foo" ) == path( "foo" );
return 0;
}
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