Add built ins to options in help output

Adds help to the options in help output with an easy way to add more
built ins.

1 files changed, 6 insertions, 0 deletions

diff --git a/parse.go b/parse.go
index 923e749..8bb2c2d 100644
--- a/parse.go
+++ b/parse.go
@@ -54,6 +54,7 @@ type spec struct {
 	positional bool
 	help       string
 	wasPresent bool
+	isBool     bool
 }
 
 // ErrHelp indicates that -h or --help were provided
@@ -135,6 +136,11 @@ func NewParser(dests ...interface{}) (*Parser, error) {
 				return nil, fmt.Errorf("%s.%s: %s fields are not supported", t.Name(), field.Name, scalarType.Kind())
 			}
 
+			// Specify that it is a bool for usage
+			if scalarType.Kind() == reflect.Bool {
+				spec.isBool = true
+			}
+
 			// Look at the tag
 			if tag != "" {
 				for _, key := range strings.Split(tag, ",") {