Child context.go

Child context.go

package main

import (
	"context"
	"errors"
	"log"
)

func main() {
	parentCtx, parentCancelWithCause := context.WithCancelCause(context.Background())
	childCtx, childCancelWithCause := context.WithCancelCause(parentCtx)
	childCancelWithCause(errors.New("error: child canceled with cause"))
	parentCancelWithCause(nil)

	<-parentCtx.Done()
	<-childCtx.Done()

	log.Println(parentCtx.Err())
	log.Println(childCtx.Err())
	log.Println(context.Cause(parentCtx))
	log.Println(context.Cause(childCtx))
}