Finding source of typeid use

[Nicholas Wilson via Digitalmars-d-learn]

On Saturday, 8 July 2017 at 08:56:17 UTC, Rainer Schuetze wrote:
>
>
> On 08.07.2017 07:55, Nicholas Wilson wrote:
>> On Saturday, 8 July 2017 at 05:36:49 UTC, rikki cattermole 
>> wrote:
>>> On 08/07/2017 2:35 AM, Nicholas Wilson wrote:
>>>> On Friday, 7 July 2017 at 08:49:58 UTC, Nicholas Wilson 
>>>> wrote:
>>>>> My library is generating a typeid from somewhere.
>>>>> e.g.
>>>>> typeid(const(Pointer!(cast(AddrSpace)1u, float)))
>>>>>
>>>>> [...]
>>>>
>>>> It seems to be coming from the need to hash the type, 
>>>> goodness knows why, which explains why I only get the const 
>>>> variety.
>>>
>>> https://github.com/dlang/druntime/blob/master/src/object.d#L253 Maybe?
>> 
>> No, the culprit is
>> https://github.com/dlang/druntime/blob/master/src/object.d#L1128
>> but IDK why it is being generated in the first place since 
>> nothing I wrote relies on being able to hash it.
>
> I suspect this is generated while building the hash function 
> for your Pointer struct in buildXtoHash in ddmd/clone.d.

Hmm, I found needToHash(StructDeclaration sd) which enumerates 
the fields
If a field is a struct
     recurse, makes sense
     if the struct has an alias this, which Pointer does, generate 
a typeinfo, with a note to see 
https://issues.dlang.org/show_bug.cgi?id=14948 / dmdPR 5001.