[Issue 7079] BigInt bool assign

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http://d.puremagic.com/issues/show_bug.cgi?id=7079



--- Comment #3 from Don <clugdbug at yahoo.com.au> 2011-12-09 01:34:20 PST ---
(In reply to comment #2)
> (In reply to comment #1)
> > I don't think:
> > 
> > int x = true;
> > 
> > should compile. That looks like a bug to me (a relic of 'bit').
> 
> The 'bit' type has no relation with this problem.
> 
> In languages as Java and Pascal boolean values and integer values are two very
> distinct types. In languages like C/C++/D/Python boolean is a kind of subset of
> integer type. 

Where did you get the idea that that applies to D? It was certainly true of
'bit', but bool is different.

> This means 
> 
> int x;
> bool b;
> x = b; // OK, it's a subset
> b = x; // error, generally
> 
> There are many situations where the implicit true -> 1 conversion is handy.

Name one.

There are many uses for 1 -> true. But not the reverse. I can't see why:

int a = b > c;  should compile.


> D accepts the implicit true -> 1 conversion in all cases.
 Refusing it only in
> BigInt assignements breaks the language simmetry. 


>I don't think the implicit true -> 1 conversion will be removed from D2,

This is what I disagree with. It's another evil implicit conversion.

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