convertion problem - No conversion from 'A@&' to 'B@' available.

Started by FDsagizi, Feb 15 2013 02:38 AM

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#1 FDsagizi Members - Reputation: 400

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Posted 15 February 2013 - 02:38 AM

I think variant "b is a" - valid, but compiler say no

class A{}
class B : A{}


void startGame( string &param )
{
    A @a;
    B @b;
    
    if( a is b )
    {}
    
    if( b is a ) //  No conversion from 'A@&' to 'B@' available.
    {}
}

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#2 Andreas Jonsson Moderators - Reputation: 2349

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Posted 15 February 2013 - 07:03 AM

Yes, you're probably right. The compiler should probably try an implicit cast of the first operand if the implicit cast of the second operand is not possible.

I'll look into this.

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