On Friday, 29 September 2023 at 11:00:05 UTC, Guillaume Piolat
wrote:
On Friday, 29 September 2023 at 08:33:56 UTC, Imperatorn wrote:
Interesting, what are the benefits of using this instead of
global variables?
Thinking about this, it's more vs TLS variable. __gshared would
require synchronization.
Changing the theAllocator (a TLS variable) in
std.experimental.allocator looks like this:
auto save = theAllocator;
theAllocator = myAllocator;
// do stuff with custom allocator
theAllocator = save;
Changing the allocator in implicit-context looks like this
context.push;
context.allocator = myAlloc;
// do stuff with custom allocator
context.pop;
so now that I think about it I'm not sure if there is an
substantial advantage over simply having TLS variables. I had
the goal of allowing .alloca on that secondary stack. If there
is many context variables, push and pop will be a bit faster to
write than all the temporaries.
I understand, it's more like if you mix optional parameters and
dependency injection?
I think for this to be truly valuable, it would require being
part of the language.
I admit I haven't really thought about implicit parameters before
your post, so I might be missing something.
