Merge pull request #2203 from oprudkyi/issue/arg_errors

feat: add name of argument into error message when parsing fails

Author: dearchap

args.go

@@ -118,7 +118,7 @@ func (a *ArgumentBase[T, C, VC]) Parse(s []string) ([]string, error) {
 	tracef("attempting arg%[1] parse", &a.Name)
 	if len(s) > 0 {
 		if err := value.Set(s[0]); err != nil {
-			return s, err
+			return s, fmt.Errorf("invalid value %q for argument %s: %v", s[0], a.Name, err)
 		}
 		*a.value = value.Get().(T)
 		tracef("set arg%[1] one value", a.Name, *a.value)
@@ -197,7 +197,7 @@ func (a *ArgumentsBase[T, C, VC]) Parse(s []string) ([]string, error) {
 	tracef("attempting arg%[1] parse", &a.Name)
 	for _, arg := range s {
 		if err := value.Set(arg); err != nil {
-			return s, err
+			return s, fmt.Errorf("invalid value %q for argument %s: %v", arg, a.Name, err)
 		}
 		tracef("set arg%[1] one value", &a.Name, value.Get().(T))
 		a.values = append(a.values, value.Get().(T))