panictoerr.gno

 1package panictoerr
 2
 3import (
 4	"errors"
 5
 6	"gno.land/p/nt/ufmt"
 7)
 8
 9// PanicToError executes a function that might panic and, if it does,
10// recovers the panic and converts it to an error.
11func PanicToError(mightPanic func()) (err error) {
12	// Catch any panic that might occur and convert it to an error.
13	defer func() {
14		if r := recover(); r != nil {
15			err = anyToError(r)
16		}
17	}()
18
19	// Execute the function that might panic.
20	mightPanic()
21
22	return nil
23}
24
25// AbortToError executes a function that might abort, and if it does,
26// revives the abort and converts it to an error.
27func AbortToError(mightAbort func()) error {
28	// Catch any abort that might occur and convert it to an error.
29	if r := revive(mightAbort); r != nil {
30		return anyToError(r)
31	}
32
33	return nil
34}
35
36// PanicAbortToError executes a function that might either panic or abort,
37// and if it does, it recovers the panic or revives the abort and converts
38// it to an error.
39func PanicAbortToError(mightPanicOrAbort func()) error {
40	var panicErr error
41
42	// Catch any panic or abort that might occur and convert it to an error.
43	if abortErr := AbortToError(func() {
44		panicErr = PanicToError(mightPanicOrAbort)
45	}); abortErr != nil {
46		return abortErr
47	}
48
49	return panicErr
50}
51
52// anyToError converts any value to an error.
53func anyToError(v any) error {
54	switch v := v.(type) {
55	case string:
56		return errors.New(v)
57	case error:
58		return v
59	default:
60		return errors.New(ufmt.Sprint(v))
61	}
62}