proposal: context: Sleep(ctx, dur)

[slsyy]

Proposal Details

I propose such a function to the context package:

func Sleep(ctx Context, dur time.Duration) error {
    select {
      case <- ctx.Done():
          return ctx.Err()
      case <- time.After(d):
          return nil
    } 
}

Rationale time.Sleep is a dangerous to use in a context-aware code as it is blocking. The only option is to use an inlined version of an above select{} statement, but it is quite verbose, so people use time.Sleep due to laziness