Dnia 2023-07-29, o godz. 22:57:15
DrGo <[email protected]> napisał(a):
> This involves introducing a new keyword "orelse" that is a syntactic sugar
> for an "if err!=nil" block.
You can implement it as a snippet under any editor in use today.
If your goal is to personally have it in just one line, you can turn off gofmt
and write `; if err !=nil {; return err }`
I'd like to point out that considering
> It is an error to not return an error from an orelse block.
The `return err` in examples still is a boilerplate, so the overall savings are
just four utf-8 bytes, ie. {\n}\n.
I understand sentiment, 'cos there is a huge camp of devs claiming that any
error handling proper is one that is done by something/someone up the
callstack, even future-me — for this camp idiomatic Go can be annoying.
But note that for the most pleasant coder experience the `orelse return err` is
way too much of text to write.
I would better stay with ^^ digraph instead. Lets name it a 'bat operator'.
func CopyFile(src, dst string) error {
r, err := os.Open(src) ^^
defer r.Close()
w, err := os.Create(dst) ^^
defer w.Close()
err = io.Copy(w, r) ^^
err = w.Close() ^^
}
> It also works well with named returns. e.g.,
func returnsObjorErro() (obj Obj, err error) {
obj, err := createObj() ^^ //returns nil and err
}
> otherwise ^^ is like "else" so e.g., it can be followed by a block if
> additional cleanup or error formatting etc is needed before returning, eg
w, err := os.Create(dst) ^^ {
....
return err
}
P.S — bat operator is easily implementable in an IDE with
onFileOpen/onFileWrite hooks.
Its the piping of content to tools (VSCode and GoLand) that bars me from
personally using it.
Hope this helps,
--
Wojciech S. Czarnecki
<< ^oo^ >> OHIR-RIPE
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