Perhaps things are different in rust, but in C assignment to something which oug...

kibwen · on May 14, 2014

Specifically, note that mistaken use of `=` vs. `==` is impossible in Rust regardless of this proposal, since:

1. assignment is an expression that returns nil

2. `if` expressions require their conditions to evaluate to boolean

3. no types can be implicitly coerced to boolean

An example:

  fn main() {
      let mut x = 2;
      if x = 4 {}  // error: mismatched types: expected `bool` but found `()`
  }