Sema: allow @ptrCast
single-item pointer to slice
#23919
+204
−138
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This is a proposal, but I think it makes sense as a trivial extension of #22706. The idea there is that we know the exact number of bytes the operand slice refers to, so we can use it to compute the length of the result slice. Well, there's another case in which we know the number of bytes the operand refers to: a single-item pointer!
Notably, where #22706 allowed replacing
mem.sliceAsBytes(slice)
with@ptrCast(slice)
, this proposal allows replacingmem.asBytes(single_ptr)
with@ptrCast(single_ptr)
(at least, in cases where you want a slice rather than an array pointer):