Add countable interface

context.go

@@ -105,13 +105,11 @@ func (cCtx *Context) Lineage() []*Context {
 	return lineage
 }
 
-// NumOccurrences returns the num of occurences of this flag
+// Count returns the num of occurences of this flag
 func (cCtx *Context) Count(name string) int {
 	if fs := cCtx.lookupFlagSet(name); fs != nil {
-		if bf, ok := fs.Lookup(name).Value.(*boolValue); ok {
-			if bf.count != nil {
-				return *bf.count
-			}
+		if cf, ok := fs.Lookup(name).Value.(Countable); ok {
+			return cf.Count()
 		}
 	}
 	return 0

flag.go

@@ -139,6 +139,12 @@ type CategorizableFlag interface {
 	GetCategory() string
 }
 
+// Countable is an interface to enable detection of flag values which support
+// repetitive flags
+type Countable interface {
+	Count() int
+}
+
 func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
 	set := flag.NewFlagSet(name, flag.ContinueOnError)
 

flag_bool.go

@@ -51,6 +51,13 @@ func (b *boolValue) String() string {
 
 func (b *boolValue) IsBoolFlag() bool { return true }
 
+func (b *boolValue) Count() int {
+	if b.count != nil {
+		return *b.count
+	}
+	return 0
+}
+
 // TakesValue returns true of the flag takes a value, otherwise false
 func (f *BoolFlag) TakesValue() bool {
 	return false

godoc-current.txt

@@ -634,7 +634,7 @@ func (cCtx *Context) Bool(name string) bool
     Bool looks up the value of a local BoolFlag, returns false if not found
 
 func (cCtx *Context) Count(name string) int
-    NumOccurrences returns the num of occurences of this flag
+    Count returns the num of occurences of this flag
 
 func (cCtx *Context) Duration(name string) time.Duration
     Duration looks up the value of a local DurationFlag, returns 0 if not found
@@ -708,6 +708,12 @@ func (cCtx *Context) Uint64(name string) uint64
 func (cCtx *Context) Value(name string) interface{}
     Value returns the value of the flag corresponding to `name`
 
+type Countable interface {
+	Count() int
+}
+    Countable is an interface to enable detection of flag values which support
+    repetitive flags
+
 type DocGenerationFlag interface {
 	Flag