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That's a little adventurous. std.algorithm is known to only have one function which allocates.

The rest of Phobos is being looked at, but to this point I don't think it has been combed thoroughly enough to say "almost entire."

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Yeah. The "almost entire" applies to std.algorithm. How much allocation goes on elsewhere depends on what module you're talking about. Some definitely avoid it, whereas others definitely require it. That will be (and has been) changing though. The main thing is probably going to be making much heavier use of output ranges rather than automatically allocating arrays/strings. We'll get there though, because there's clearly a lot of interest in doing so, and there's no fundamental reason why we can't.

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