Исходники и презентации

lessons/errors/error_behavior/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+)
+
+type ErrorFromAnotherPackage struct{}
+
+func (e ErrorFromAnotherPackage) Error() string {
+	return "error"
+}
+
+func (e ErrorFromAnotherPackage) Path() string {
+	return "path"
+}
+
+type FSError interface {
+	Path() string
+}
+
+func IsFSError(err error) bool {
+	_, ok := err.(FSError)
+	return ok
+}
+
+func getErrorFromAnotherPackage() error {
+	return ErrorFromAnotherPackage{}
+	//return fmt.Errorf("%w", ErrorFromAnotherPackage{})
+}
+
+func main() {
+	err := getErrorFromAnotherPackage()
+	if IsFSError(err) {
+		fmt.Println("FSError")
+	}
+}