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main.go
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main.go
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package main
import (
"errors"
"fmt"
"log"
pkg_errors "github.com/pkg/errors"
)
func main() {
// presentSimpleErrors()
presentPErrors()
}
func presentPErrors(){
var e error
e = funcWithPError()
log.Println(e)
log.Println("----------------")
fmt.Printf("%+v\n", e)
e=funcWithWrappedError()
log.Println("----------------")
fmt.Printf("%+v\n", e)
e=funcWithChainOfPErrors()
log.Println("----------------")
fmt.Printf("%+v\n", e)
}
func presentSimpleErrors(){
var e error
e = funcWithError()
log.Println(e)
log.Println("----------------")
e = funcWithRecoverablePanic()
log.Println(e)
log.Println("----------------")
funcWithPanic()
}
func funcWithError() error {
return errors.New("failure occured")
}
func funcWithPanic() {
panic("I forgot to switch off an iron")
}
func funcWithRecoverablePanic() (err error) {
defer func() {
if rec := recover(); rec != nil {
err = fmt.Errorf("%v", rec)
}
}()
panic("I lost my car keys")
}
func funcWithPError() error {
//stack info is stored in error
return pkg_errors.New("my cool error")
}
func funcWithWrappedError() error {
e:= funcWithError()
return pkg_errors.Wrapf(e, "Error processing func")
}
func funcWithChainOfPErrors() error{
e:= funcWithPError()
return pkg_errors.Wrapf(e, "Error processing func")
}