Default value of class
davidb
ta-nospam-zz at gmx.at
Sun May 20 06:13:28 PDT 2007
Dave schrieb:
> David B. Held wrote:
>> Can anyone tell me the expected runtime behavior of this program?
>>
>> class Foo
>> { }
>>
>> void main()
>> {
>> Foo foo;
>> assert(foo == null);
>> }
>>
>> It's certainly not what I expected, and I want to know if I should
>> file a bug report or not.
>>
>> Dave
>
> Try 'assert(foo is null);'
See http://www.digitalmars.com/d/operatoroverloading.html
> Note: Comparing a reference to a class object against null should be
> done as:
>> if (a is null)
> and not as:
>> if (a == null)
> The latter is converted to:
>> if (a.opEquals(null))
which will fail if a is null because it can't use it to reference to
opEquals()
david
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