On 11/04/2013 11:00 AM, Gaetan wrote:
hello
I'm new in the rust dev list, so sorry if the question has already
been rised.
But what is the reason to have 2 libraries std/extra? why not
gathering all in a single "std" library?
There are a few reasons for the split between std and extra.
In general, we think the correct strategy for organizing Rust code is to
use many small crates; one of the main reasons for this is to avoid
large compilation times, but there are arguable modularity benefits as
well. Personally I'd like to avoid Java's situation where there is one
very large monolithic standard library that we have to live with in its
entirety forever. The 'vision' currently is to have a rich ecosystem of
officially supported packages in addition to the monolithic standard
library. Under this scheme libextra will not exist at all, and will
instead be broken up into a bunch of individual packages in their own
repositories. Packages can be developed and stabilized and deprecated by
the larger community on their own schedules, and those that fall out of
use can disappear gracefully.
The standard library though is monolithic because it has many complex
interdependencies and wasn't developed with any intent to be more
modular. In my opinion the definition of std is something like 'all the
abstractions that depend on some interface to the compiler (this
includes primitive types, the runtime, atomics), plus those that are so
common that most moderate-sized software will need them (various data
structures, algorithms and OS interfaces)'.
I don't actually recall the original motivation for the split, but this
is my current thinking.
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