From c75d600940b76354bc18d26d10c0ecd03b31f758 Mon Sep 17 00:00:00 2001 From: Filipe Brandenburger Date: Fri, 16 Jan 2015 10:43:36 -0800 Subject: Add support for custom boolean flags through IsBoolFlag() This is consistent with Go's native flag parsing module and can be used to implement custom boolean/tri-state flags. Signed-off-by: Filipe Brandenburger --- bool.go | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'bool.go') diff --git a/bool.go b/bool.go index 010576c..70e2e0a 100644 --- a/bool.go +++ b/bool.go @@ -5,6 +5,13 @@ import ( "strconv" ) +// optional interface to indicate boolean flags that can be +// supplied without "=value" text +type boolFlag interface { + Value + IsBoolFlag() bool +} + // -- bool Value type boolValue bool @@ -25,6 +32,8 @@ func (b *boolValue) Type() string { func (b *boolValue) String() string { return fmt.Sprintf("%v", *b) } +func (b *boolValue) IsBoolFlag() bool { return true } + // BoolVar defines a bool flag with specified name, default value, and usage string. // The argument p points to a bool variable in which to store the value of the flag. func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) { -- cgit v1.2.3