Generate flag error output for errors returned from the parseFunc (sp…

…f13#138)
gonix · Sep 30, 2017 · 5c2d607 · 5c2d607
1 parent 7aff26d
commit 5c2d607
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/flag.go b/flag.go
@@ -916,6 +916,9 @@ func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []strin
 	}
 
 	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
 	return
 }
 
@@ -966,6 +969,9 @@ func (f *FlagSet) parseSingleShortArg(shorthands string, args []string, fn parse
 	}
 
 	err = fn(flag, value)
+	if err != nil {
+		f.failf(err.Error())
+	}
 	return
 }