v/vlib/context/empty.v

38 lines
679 B
V

module context
import time
// An EmptyContext is never canceled, has no values, and has no deadline. It is not
// struct{}, since vars of this type must have distinct addresses.
pub type EmptyContext = int
pub fn (ctx EmptyContext) deadline() ?time.Time {
return none
}
pub fn (ctx EmptyContext) done() chan int {
ch := chan int{}
defer {
ch.close()
}
return ch
}
pub fn (ctx EmptyContext) err() string {
return ''
}
pub fn (ctx EmptyContext) value(key string) ?voidptr {
return none
}
pub fn (ctx EmptyContext) str() string {
if ctx == background {
return 'context.Background'
}
if ctx == todo {
return 'context.TODO'
}
return 'unknown empty Context'
}