Re: [pygccxml-development] type_traits problem

[Allen B. <al...@vr...>]

I have attached a patch that adds a test case.

I think all the is_* tests suffer from a similar problem.  They only 
seem to examine the "outside" most type information and ignore the 
internal data.

For example, shouldn't is_float return true for a "const float" type?

-Allen

Roman Yakovenko wrote:

> On 5/12/06, Allen Bierbaum <al...@vr...> wrote:
>
>> I just ran into an annoyance that I had seen before bug forgot to post.
>>
>> I am checking a return_type from a method to see if it is a const
>> reference and the type traits are not working well.
>>
>> The problem is that is_const and is_reference only check the most
>> external portion of a composed type.  So if you want to check if
>> something is really a const ref you have do write code something like
>> this (please correct me if I am wrong).
>>
>> ret_type = method.return_type
>> is_ref = True in map(declarations.is_reference,
>> declarations.decompose_type(ret_type))
>> is_const = True in map(declarations.is_const,
>> declarations.decompose_type(ret_type))
>> is_const_ref = (is_ref and not is_const)
>>
>> Boost type traits and other libraries like it automatically do the
>> decomposition so you could check a const reference type and it will
>> return true to both is_reference and is_const.
>>
>> Is there any reason that we shouldn't make pygccxml work similarly?
>
>
> Yes. I did not have test case for this. If you can send me test case I 
> will make
> sure it works as expected.
>
>> -Allen
>>
>>
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>
>