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From:	"Dave Korn" <dave DOT korn AT artimi DOT com>
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Subject:	RE: cygwin g++ strictness
Date:	Fri, 31 Oct 2008 12:22:23 -0000
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John Emmas wrote on 31 October 2008 12:15:

> ----- Original Message -----
> From: "Václav Haisman"
> Sent: 31 October 2008 11:54
> Subject: Re: cygwin g++ strictness
>> 
>> That has nothing to do with your problem. Reference to int and reference
>> to long are two totally unrelated types. The implicit conversions of
>> C/C++ only apply to values, not references.
>> 
> Ah, fair enough, I'd never thought about it but it's obvious now you've
> mentioned it.
> 
> 
>> 
>> No, casting is not an option, really. You have references. What do you
>> intend to cast x and y to? 
>> 
> Maybe it's a happy accident but this seems to compile and link (and work)
> 
> int AddTwoInts (int& a, int& b);
> 
> int32_t x = 4;
> int32_t y = 5;
> int z = AddTwoInts ((int&)x, (int&)y);  // Compiles, links and works

  You are creating temporaries here.  If AddTwoInts modifies either of the int
references it has, that will only change the temporaries; x and y will /not/
be modified.


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


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