Re: [Boost-users] function template with a universal reference to a specific type

Subject: Re: [Boost-users] function template with a universal reference to a specific type
From: Ireneusz Szcześniak (irek.szczesniak_at_[hidden])
Date: 2018-12-31 08:01:11

Thank you for the advice!

On 30.12.2018 17:16, Good Guy via Boost-users wrote:
> I don't know answer to your question but if you want to know about 
> another generic C++ newsgroup then you can try this:
> 
> <news://nntp.aioe.org/comp.lang.c++>
> 
> It is very active but like any unmoderated newsgroups, you can expect 
> the thread to drift away from the main question.
> 
> Good luck and a very Happy & Prosperous New Year
> 
> On 30/12/2018 15:04, Ireneusz Szcześniak via Boost-users wrote:
>> Hi,
>>
>> I'm writing to ask a C++ question, not specifically Boost-related, 
>> but this list is the best place I know.
>>
>> How can I write a function template, which has a parameter of the 
>> universal reference to a specific type?
>>
>> I can write a function template like this:
>>
>> template <typename T>
>> void
>> foo(T &&t)
>> {
>> Â  // The primary template implementation.
>> Â  cout << "Primary: " << __PRETTY_FUNCTION__ << endl;
>> }
>>
>> And so I can call this function with an expression of any value 
>> category, and any type, cv-qualified or not, like this:
>>
>> int
>> main()
>> {
>> Â  foo(1);
>> Â  int i = 1;
>> Â  foo(i);
>> Â  const int ci = 1;
>> Â  foo(ci);
>> }
>>
>> In my code I need to provide different implementations of foo for 
>> different types (and these types are templated).  How can I 
>> accomplish that?
>>
>>
>> Best,
>> Irek
> 
> 
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