> https://github.com/mozilla/rust/issues/2643
I came here to post that link, you beat me to it. :) Highly, vehemently, frothing-at-the-mouthly against adding `var` as sugar for `let mut`. You can see from reading that issue that I too was once a fan of getting rid of `let mut`, but after using Rust in the years since I can see how lovely the current setup is. I was the one who initiated the widespread grepping recently that found that `let` was three times more common than `let mut`, and I admit I was surprised to find that immutability was so completely dominant. Immutability is crucial to Rust. Mutability *must* be explicit. Not having to ever worry about const-correctness is icing on the cake. Adding an alternative form for `let mut` would go completely against the spirit of the language. On Thu, Jan 30, 2014 at 12:18 PM, Tim Chevalier <[email protected]>wrote: > I'm surprised that no one has mentioned so far that there was a > previous, exhaustive, discussion of this question on github: > > https://github.com/mozilla/rust/issues/2643 > > As far as I can tell, this thread adds nothing new that wasn't already > discussed in the comments on #2643. So that strongly suggests to me > that nothing needs to be changed. > > Cheers, > Tim > > > On Thu, Jan 30, 2014 at 8:49 AM, Steven Fackler <[email protected]> > wrote: > > The Zen of Python also says "There should be one-- and preferably only > one > > --obvious way to do it." > > > > Steven Fackler > > > > > > On Thu, Jan 30, 2014 at 11:35 AM, Donaldo Fastoso > > <[email protected]> wrote: > >> > >> I like python's rational of "consenting adults": Give people the tools > >> to do the right thing, if they still want to hurt themselves, they may > >> have a good reason, or they are better of dead! ;-) > >> > >> I would argue, that people choosing Rust over C/C++ are choosing it > >> BECAUSE of safety measures like immutability and wouldn't need > >> overbearing lectures. > >> > >> In all honesty it's not the TYPING of three additional chars "let mut", > >> but the READING. It interrupts the flow of reading, or better: it's > >> a bump in the flow of scanning. Source-Code is not prosa, you have to > >> actively follow the train of thought and guess the intentions of the > >> author. So improving READABILITY would really be nice, especially > >> for people coming from other languages. They would probably try to > >> learn by reading the source from experienced programmers. > >> > >> In this case i would also advice against the use of "var", instead > >> of "let mut", but omitting "let" and leave it to "mut" would be much > >> easier to read and understand. > >> > >> so > >> "let mut x, y;" > >> > >> would become: > >> > >> "mut x;" > >> "let y;" > >> > >> which would take a possible interpretation-ambiguity away from the > >> single "let mut x, y", which can be read either as "let mut" for x > >> and y, or "let mut x" and "let y"! > >> > >> So imho "let mut" has at least two pitfalls: > >> 1) read-bump > >> 2) ambiguity. > >> > >> AFAIK you did a remarkable good job so far, and i have all the faith > >> you are considering all arguments before coming to a decision. > >> > >> Even if some thoughts of the thoughts come form the bad smelling > >> "lurker"-fraction, which do nothing but making comments about things > they > >> possible can't understand! ;-) > >> > >> Regards, > >> Don > >> > >> _______________________________________________ > >> Rust-dev mailing list > >> [email protected] > >> https://mail.mozilla.org/listinfo/rust-dev > > > > > > > > _______________________________________________ > > Rust-dev mailing list > > [email protected] > > https://mail.mozilla.org/listinfo/rust-dev > > > > > > -- > Tim Chevalier * http://catamorphism.org/ * Often in error, never in doubt > "If you are silent about your pain, they'll kill you and say you enjoyed > it." > -- Zora Neale Hurston > _______________________________________________ > Rust-dev mailing list > [email protected] > https://mail.mozilla.org/listinfo/rust-dev >
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