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Dec 4th, 2008
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Point*& to Point&

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I'm currently working on implementing a small game in C++, but when trying to compile, I get this error:

C++ Syntax (Toggle Plain Text)
  1. ..quadtree.h:125: error: no matching function for call to 'Fleet::Ship::overlaps(const Fleet::Ship*&)'
  2. ..ship.h:40: note: candidates are: bool Ship::overlaps(const Rectangle&) const
  3. ..ship.h:85: note:                 bool Ship::overlaps(const Ship&) const
  4. ..ship.h:32: note:                 bool Ship::overlaps(const Point&) const

So I think I now have Ship*&, which should actually be Ship&.
Is there any way to convert Ship*& to Ship&?

Thanks
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JD2000 is offline Offline
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Dec 4th, 2008
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Re: Point*& to Point&

Post your code.
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chococrack is offline Offline
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Dec 4th, 2008
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Re: Point*& to Point&

Click to Expand / Collapse  Quote originally posted by JD2000 ...
So I think I now have Ship*&, which should actually be Ship&.
Is there any way to convert Ship*& to Ship&?
Yes, of course: use unary operator *(). But I'm not sure that it helps
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Re: Point*& to Point&

C++ Syntax (Toggle Plain Text)
  1. //...
  2. Ship old_ship;
  3. Ship *new_ship=new Ship;
  4. old_ship.overlaps(new_ship);
  5. //...
i'm not sure too..
Last edited by cikara21; Dec 5th, 2008 at 4:01 am.
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Re: Point*& to Point&

Use the following to make the function call

[code = C++]
old_ship.overlaps(*new_ship);
[/code]

You have defined to function to catch a reference and you are sending pointer the object which would be a mismatch
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sweeya is offline Offline
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Dec 5th, 2008
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Re: Point*& to Point&

In the function call here
C++ Syntax (Toggle Plain Text)
  1. 'Fleet::Ship::overlaps(const Fleet::Ship*&)'
you are passing a pointer instead of a reference. Dereference the parameter by prefixing it with a '*'.

C++ Syntax (Toggle Plain Text)
  1. class A;
  2.  
  3. void func(A & a) {...}
  4.  
  5. A a;
  6. A *p = &a;
  7. func(*p); // like this
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jencas is offline Offline
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Dec 9th, 2008
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Re: Point*& to Point&

It's all solved now

Thanks

btw dereferencing the parameters worked
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