[PATCH, libstdc++] Uniform container erasure for c++20.

[Jonathan Wakely]

On 29/11/18 08:47 -0500, Ed Smith-Rowland wrote:
>Fixed with 266616.

Thanks!

>Index: include/std/deque
>===================================================================
>--- include/std/deque	(revision 266567)
>+++ include/std/deque	(working copy)
>@@ -58,6 +58,7 @@
> #pragma GCC system_header
>
> #include <bits/stl_algobase.h>
>+#include <bits/stl_algo.h> // For remove and remove_if

Please only include <bits/stl_algo.h> when __cplusplus > 201703L
otherwise we include hundreds of kilobytes of code just for these tiny
functions that aren't even defined in the default C++14 dialect.

At some point I'll split std::remove and std::remove_if into their own
header, and we can just include that instead.