[patch] [C++14] Implement N3657: heterogeneous lookup in associative containers.

[François Dumont]

Sorry, I hadn't notice the condition to expose the new methods. It was 
hidden within the _Rb_tree type that I hadn't check (and I do not often 
check the Standard directly for my limited patches).

On my side I am surprised you didn't reuse your code to detect member 
types. I am also surprised that it is not using enable_if, IMHO it makes 
the code clearer. Here is a proposal to use both extended to the debug 
mode too.

François


On 22/01/2015 03:07, Jonathan Wakely wrote:
> On 21/01/15 23:30 +0100, François Dumont wrote:
>> +#if __cplusplus > 201103L
>> +      template<typename _Kt>
>> +    std::pair<iterator, iterator>
>> +    equal_range(const _Kt& __x)
>> +    {
>> +      std::pair<_Base_iterator, _Base_iterator> __res =
>> +        _Base::equal_range(__x);
>> +      return std::make_pair(iterator(__res.first, this),
>> +                iterator(__res.second, this));
>> +    }
>
> BTW, this is C++14 code, what's wrong with:
>
>  template<typename _Kt>
>    std::pair<const_iterator, const_iterator>
>    equal_range(const _Kt& __x) const
>    {
>      auto __res = _Base::equal_range(__x);
>      return { iterator(__res.first, this), iterator(__res.second, 
> this) };
>    }
>
> Or even:
>
>  template<typename _Kt>
>    std::pair<const_iterator, const_iterator>
>    equal_range(const _Kt& __x) const
>    {
>      auto __res = _Base::equal_range(__x);
>      return { { __res.first, this }, {__res.second, this} };
>    }
>

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