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// Copyright 2016 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package stringsetflag
import (
"flag"
"fmt"
"os"
)
// Example demonstrates how to use stringlistflag.
func Example() {
sset := Flag{}
fs := flag.NewFlagSet("test", flag.ContinueOnError)
fs.Var(&sset, "color", "favorite color, may be repeated.")
fs.SetOutput(os.Stdout)
fs.PrintDefaults()
// Flag parsing.
fs.Parse([]string{"-color", "Violet", "-color", "Red", "-color", "Violet"})
fmt.Printf("Value is: %s\n", sset)
fmt.Println("Likes Blue:", sset.Data.Has("Blue"))
fmt.Println("Likes Red:", sset.Data.Has("Red"))
// Output:
// -color value
// favorite color, may be repeated.
// Value is: Red,Violet
// Likes Blue: false
// Likes Red: true
}