在2009-07-02，"Steven Watanabe" <watanabesj@gmail.com> 写道：
>AMDG
>
>fmingu wrote:
>> But how can I change the expression to be legal and usable?
>>  bind(&std::pow,constant(-1),bind(&IIPrimemap::size,var(primemapvec)));
>> I tried :
>> bind(&std::pow,constant(-1.0),bind<int>(&IIPrimemap::size,var(primemapvec)));
>> and 
>> bind(&std::pow,constant(-1.0),ret<int>(bind(&IIPrimemap::size,var(primemapvec))));
>> even 
>> bind(&std::pow,constant(-1.0),ll_dynamic_cast<int>(bind(&IIPrimemap::size,var(primemapvec))));
>> But the complier told me that:
>> cannot resolve overloaded function `pow' based on conversion to 
>>    type `unsigned int'
>>   
>
>Ignore the "conversion to unsigned int" part. The compiler
>doesn't know how to handle std::pow and gets itself confused.
>The problem is &std::pow, not the inner bind expression.
>
>> I do not know how to solve now.
>> Can anyone with kindness help me?
>>
>>   
>>> You can't pass the address of an overloaded function to
>>> a function template like bind without casting it to the
>>> correct function pointer type.
>>>     
>
>In Christ,
>Steven Watanabe
>