[cfe-dev] early instantiation of defaulted copy constructor

[Richard Smith]

On Sun, Apr 29, 2012 at 11:59 AM, Nathan Ridge <zeratul976 at hotmail.com>wrote:

>
> Hello,
>
> The following code fails to compile with Clang trunk:
>
> template <class T, class U>
> struct pair
> {
>     T first;
>     U second;
>
>     pair() : first(), second() {}
>
>     pair(const pair&) = default;
> };
>
> struct S
> {
>     S() {}
>     S(const S&) = delete;
>     S(S&&) = default;
> };
>
> int main()
> {
>     pair<int, S> p;
> }
>
> The errors are:
>
> test.cpp:9:5: error: the parameter for this explicitly-defaulted copy
> constructor is const, but a member or base requires it to be
>       non-const
>     pair(const pair&) = default;
>     ^
> test.cpp:21:18: note: in instantiation of template class 'pair<int, S>'
> requested here
>     pair<int, S> p;
>                  ^
>

Thanks for the report! This issue was fixed over a week ago. Trunk clang
accepts your code.
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