Found by Coverty in LibreOffice

[John Colvin via Digitalmars-d]

On Monday, 10 November 2014 at 10:23:09 UTC, Rikki Cattermole 
wrote:
> On 10/11/2014 11:04 p.m., bearophile wrote:
>> Some of the bugs that the static analysis tool Coverty has 
>> found in the
>> C++ code of LibreOffice:
>>
>> http://cgit.freedesktop.org/libreoffice/core/log/?qt=grep&q=coverity
>>
>>
>> Cases like this remind me that division operator shouldn't 
>> accept a
>> divisor of generic integer/floating/multi-precision type, but 
>> a type
>> that lacks a zero:
>>
>> http://cgit.freedesktop.org/libreoffice/core/commit/?id=4a83b67e3c3dc8bceb6602ce155f2463f72f4855
>>
>>
>> http://cgit.freedesktop.org/libreoffice/core/commit/?id=7ca34b04c0915cb00345afa1ba7cfc736f82f9a1
>>
>>
>> http://cgit.freedesktop.org/libreoffice/core/commit/?id=c61b2066660fb0130f0b0f9f51b48e3799625b83
>>
>>
>> Bye,
>> bearophile
>
> Interesting.
> Code like this could be rather interesting.
>
> alias NonZero = AbituaryRestriction!("value == 0", "Value 
> cannot be 0");
> template AbituaryRestriction(string restriction, string reason) 
> {
> 	struct AbituaryRestriction(T) {
> 		T value;
> 		alias value this;
> 	
> 		this(T value) {
> 			this.value = value;
> 		}
> 		
> 		invariant() {
> 			if (mixin(restriction)) {
> 				throw new Exception(reason);	
> 			}
> 		}
> 		
> 		void opAssign(float value) {
> 			this.value = value;	
> 		}
> 	}
> }
>
> void main() {
> 	NonZero!float ft = 0.5f;
> 	ft = 0;
> }

you mean arbitrary, right?