src/librustc_error_codes/error_codes/E0628.md

   1 More than one parameter was used for a generator.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0628
   6 #![feature(generators, generator_trait)]
   7
   8 fn main() {
   9     let generator = |a: i32, b: i32| {
  10         // error: too many parameters for a generator
  11         // Allowed only 0 or 1 parameter
  12         yield a;
  13     };
  14 }
  15 ```
  16
  17 At present, it is not permitted to pass more than one explicit
  18 parameter for a generator.This can be fixed by using
  19 at most 1 parameter for the generator. For example, we might resolve
  20 the previous example by passing only one parameter.
  21
  22 ```
  23 #![feature(generators, generator_trait)]
  24
  25 fn main() {
  26     let generator = |a: i32| {
  27         yield a;
  28     };
  29 }
  30 ```