Ah, yeah. There shouldn't be any runtime difference if you don't leak the address of `i` somewhere the compiler can't see, which should be uncommon for an iter

Ah, yeah. There shouldn't be any runtime difference if you don't leak the address of `i` somewhere the compiler can't see, which should be uncommon for an iterator. But I agree it's awkward. You can wrap the whole thing in an extra block, so at least you don't have to hoist `i` to the top of the function. > (Declaring variables willy nilly anywhere in a block is nice too) You can always introduce another block, although it's not uncommon that that's harder on legibility than just hoisting.