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0 pointscmrx6412y ago0 comments

Well, yes, borrowed pointers can point onto the stack, but we don't have string values that can live on the stack, not really. String slices, denoted as `&str`, can point into the stack if you construct them from a `[u8, ..N]` (a fixed-length vector).

String literals are stored in the ro section, as one might expect.

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2 comments · 1 top-level

MichaelGG12y ago· 1 in thread

Right, literals, but for example, suppose I'm creating a ton of temporary strings (e.g. appending a filename to get a full path and calling touch on it) - in C#, I'm going to heap-alloc a new string for each call. With Rust, I _could_ compose it into a stack-alloc'd buffer, and pass it any function taking a string it doesn't need to own, correct?

dbaupp12y ago

Yes, you can put a fixed-length buffer of bytes (e.g. `[u8, .. 1024]` is 1kb) on the stack and use that as the backing vector for the string.

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