On Wednesday, 16 September 2015 at 02:59:06 UTC, Random D user
wrote:
I'm trying to make a base class with get property and a sub
class with corresponding set property. The value for the base
class is set via constructor.
The intuitive way doesn't seem to work and workarounds are
unnecessarily ugly (considering you'll sprinkle them all over
the codebase).
class Father
{
int eat()
{
return 1;
}
}
class Daughter : Father
{
void eat( int apples ) {}
// int eat() { return super.eat(); } // Workaround A,
works as expected
//override int eat( int apples ) {} // Workaround D,
fails -> Error: function main.Daughter.eat does not override
any function, did you mean to override 'main.Father.eat'?
}
Daughter d = new Daughter();
// BUG? I expected this to work. It seems that compiler doesn't
even look into parent class to see if there's a matching
function.
//int num = d.eat(); // Error: function
main.Daughter.eat (int apples) is not callable using argument
types ()
int num2 = (cast(Father)d).eat(); // Workaround B, works as
expected
int num3 = d.Father.eat(); // Workaround C, works as
well
Considering Father defines the function `int eat()` and Daughter
defines the completely different function `int eat(int)`, it
doesn't surprise me. You're not using virtual dispatch when you
do `return super.eat` or `d.Father.eat()`, you're delegating the
method call to the base class.
