Re: [boost] Re: What is a mutable reference?

From: Kevlin Henney (kevlin_at_[hidden])
Date: 2000-05-31 00:21:02

In message <802568EF.00713157.00_at_[hidden]>, Jon Jagger
<jon.jagger_at_[hidden]> writes
>Hi,
>I'm sure it's just me not knowing some obscure corner of C++, but what is a
>mutable reference?
>
>> template <class X, class Y>
>> struct tied
>> {
>>     tied(X& x, Y& y) : m_x(x), m_y(y) {}
>>
>>     template <class T1, class T2>
>>     void operator=(const std::pair<T1,T2>& p)
>>         { m_x = p.first; m_y = p.second; }
>>     mutable X& m_x;
>>     mutable Y& m_y;
>> };

It's illegal, which saves having to dream up an interpretation for it
:->
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