| Issue |
56417
|
| Summary |
Clang fails to compile ranges example from cppreference using libstdc++
|
| Labels |
c++20,
rejects-valid,
libstdc++
|
| Assignees |
|
| Reporter |
junaire
|
The example below is taken from: https://en.cppreference.com/w/cpp/ranges
```
#include <ranges>
#include <iostream>
int main()
{
auto const ints = {0,1,2,3,4,5};
auto even = [](int i) { return 0 == i % 2; };
auto square = [](int i) { return i * i; };
// "pipe" syntax of composing the views:
for (int i : ints | std::[views::filter](http://en.cppreference.com/w/cpp/ranges/filter_view)(even) | std::[views::transform](http://en.cppreference.com/w/cpp/ranges/transform_view)(square)) {
[std::cout](http://en.cppreference.com/w/cpp/io/cout) << i << ' ';
}
[std::cout](http://en.cppreference.com/w/cpp/io/cout) << '\n';
// a traditional "functional" composing syntax:
for (int i : std::[views::transform](http://en.cppreference.com/w/cpp/ranges/transform_view)(std::[views::filter](http://en.cppreference.com/w/cpp/ranges/filter_view)(ints, even), square)) {
[std::cout](http://en.cppreference.com/w/cpp/io/cout) << i << ' ';
}
}
```
GCC and MSVC both accept it, and Clang can compile it with `-stdlib=libc++`, but fails with `libstdc++`. (https://godbolt.org/z/erv7TbdsG)
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