1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
package kingpin
// Action callback triggered during parsing.
//
// "element" is the flag, argument or command associated with the callback. It contains the Clause
// and string value, if any.
//
// "context" contains the full parse context, including all other elements that have been parsed.
type Action func(element *ParseElement, context *ParseContext) error
type actionApplier interface {
applyActions(*ParseElement, *ParseContext) error
applyPreActions(*ParseElement, *ParseContext) error
}
type actionMixin struct {
actions []Action
preActions []Action
}
func (a *actionMixin) addAction(action Action) {
a.actions = append(a.actions, action)
}
func (a *actionMixin) addPreAction(action Action) {
a.actions = append(a.actions, action)
}
func (a *actionMixin) applyActions(element *ParseElement, context *ParseContext) error {
for _, action := range a.actions {
if err := action(element, context); err != nil {
return err
}
}
return nil
}
func (a *actionMixin) applyPreActions(element *ParseElement, context *ParseContext) error {
for _, preAction := range a.preActions {
if err := preAction(element, context); err != nil {
return err
}
}
return nil
}
|
