[v3] PATCH to make _BracketMatcher::_S_cache_size a variable

[Jonathan Wakely]

On 10/05/18 13:59 -0400, Jason Merrill wrote:
>There doesn't seem to be any reason for _S_cache_size to be a function
>rather than a variable.  OK for trunk?

I vaguely recall some problem with that constant, maybe it didn't work
as a variable once upon a time. If that was ever true it was fixed
long ago so the change is OK, thanks.