Re: Richard M. Stallman says GNU/Linux, but Rust lang ecosystem is growing.

[馬 冰]

"it's just an adapter from internal API to one operating on `int`s, i.e.
`Ok()` will be converted to `0`, and an error will be converted to
another number", it may cost more memory if using 2 type systems 
simultaneously. Rust Result can use Box to allocate errors with unknown size on 
heap, whereas int is fixed-size, they may be incompatible due to unknown size 
and fixed-size.