I've been working on a NES emulator in rust and so far I really like the language.
Other than managing lifetimes, which can be difficult, the only thing that really bugs me is the lack of safe type promotion. for example, if I have:
fn add(a: u8) -> u16 {
a + 7
}
the compiler should not complain that the expression is of type u8 and not u16 - it is safe to widen the type!
Other minor nits:
- it would be nice if enums were scoped. I think putting names in the outer namespace repeats a poor design in C. Enums should look like MyEnum.MyValue. I know the ADT nature of rust enums might throw a wrench in this
- I really dislike the word "mut". it looks like mutt to me. I don't really know how to fix this, though. Perhaps reuse the @ sigil once it goes away?
- Once macros are mature, it would be nice not to require them to be suffixed with !. I'm a lisp guy at heart in this respect... macros should be full power and macro use should feel just like that feature was built into the language
- JSON style literals for hash maps would be nice
- Ternary operator pls
Other than those small complaints, I have to say that rust has been a joy!
Other than managing lifetimes, which can be difficult, the only thing that really bugs me is the lack of safe type promotion. for example, if I have:
fn add(a: u8) -> u16 { a + 7 }
the compiler should not complain that the expression is of type u8 and not u16 - it is safe to widen the type!
Other minor nits:
- it would be nice if enums were scoped. I think putting names in the outer namespace repeats a poor design in C. Enums should look like MyEnum.MyValue. I know the ADT nature of rust enums might throw a wrench in this
- I really dislike the word "mut". it looks like mutt to me. I don't really know how to fix this, though. Perhaps reuse the @ sigil once it goes away?
- Once macros are mature, it would be nice not to require them to be suffixed with !. I'm a lisp guy at heart in this respect... macros should be full power and macro use should feel just like that feature was built into the language
- JSON style literals for hash maps would be nice
- Ternary operator pls
Other than those small complaints, I have to say that rust has been a joy!