Destroyed Kiura Magomadov "Addition to Go2 draft error handling" September 2018 (markdown)
diff --git "a/Kiura-Magomadov-\"Addition-to-Go2-draft-error-handling\"-September-2018.md" "b/Kiura-Magomadov-\"Addition-to-Go2-draft-error-handling\"-September-2018.md"
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--- "a/Kiura-Magomadov-\"Addition-to-Go2-draft-error-handling\"-September-2018.md"
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-This is just another way to deal with errors following Go2 draft structure.
-
-If I understood correctly `handle` is used as defer in many proposals, which, could be a drawback in case we want the function to fail as soon as error occurs.
-So, a better scenario could be as follows:
-
-1) Unhandled error occurs - it is thrown and parent function should handle it
-2) Handled error occurs - `handle` function catches it and performs some operations before exiting the function (in the handle function one can decide to throw an error again if he/she needs to add additional info to the err)
-
-``` Golang
-func CopyFile(src, dst string) throws error {
- r := os.Open(src) // option 1
- defer r.Close()
-
- w := os.Create(dst)
- err := io.Copy(w, r) // option 2
- err2 := w.Close() // option 2
- handle err || err2 { // handle function is executed if `err` or `err2` is not equal to `nil`
- w.Close()
- os.Remove(dst)
- // optionally throw error here
- // return errors.New("could not copy.")
- }
-}
-```
-Actually I am not sure why `try catch` is not considered, it seems it could be the best solution (familiar syntax)
-
-``` Golang
-func CopyFile(src, dst string) throws error {
- r := os.Open(src) // thrown so parent function can catch it or pass to its parent
- defer r.Close()
-
- w := os.Create(dst)
- try { // handle special case
- io.Copy(w, r)
- w.Close()
- } catch err {
- w.Close()
- os.Remove(dst)
- // optionally throw error here
- // return errors.New("could not copy.")
- // or to make it consistent with other languages throw it
- // throw errors.New("could not copy.")
- }
-}
-```
-***
-
-Methods without comments:
-
-1.
-``` Golang
-func CopyFile(src, dst string) throws error {
- r := os.Open(src)
- defer r.Close()
-
- w := os.Create(dst)
- err := io.Copy(w, r)
- err2 := w.Close()
- handle err || err2 {
- w.Close()
- os.Remove(dst)
- }
-}
-```
-2.
-
-``` Golang
-func CopyFile(src, dst string) throws error {
- r := os.Open(src)
- defer r.Close()
-
- w := os.Create(dst)
- try {
- io.Copy(w, r)
- w.Close()
- } catch err {
- w.Close()
- os.Remove(dst)
- }
-}
-```
\ No newline at end of file
