1 files changed, 32 insertions, 0 deletions
diff --git a/src/mongo/gotools/common/util/bool.go b/src/mongo/gotools/common/util/bool.go
new file mode 100644
index 00000000000..d49a8483b9e
--- /dev/null
+++ b/src/mongo/gotools/common/util/bool.go
@@ -0,0 +1,32 @@
+package util
+
+import (
+	"gopkg.in/mgo.v2/bson"
+	"reflect"
+)
+
+// IsTruthy returns true for values the server will interpret as "true".
+// True values include {}, [], "", true, and any numbers != 0
+func IsTruthy(val interface{}) bool {
+	if val == nil {
+		return false
+	}
+	if val == bson.Undefined {
+		return false
+	}
+
+	v := reflect.ValueOf(val)
+	switch v.Kind() {
+	case reflect.Map, reflect.Slice, reflect.Array, reflect.String, reflect.Struct:
+		return true
+	default:
+		z := reflect.Zero(v.Type())
+		return v.Interface() != z.Interface()
+	}
+}
+
+// IsFalsy returns true for values the server will interpret as "false".
+// False values include numbers == 0, false, and nil
+func IsFalsy(val interface{}) bool {
+	return !IsTruthy(val)
+}