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// Copyright 2013 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package getopt
import (
"fmt"
"strings"
)
type boolValue bool
func (b *boolValue) Set(value string, opt Option) error {
switch strings.ToLower(value) {
case "", "1", "true", "on", "t":
*b = true
case "0", "false", "off", "f":
*b = false
default:
return fmt.Errorf("invalid value for bool %s: %q", opt.Name(), value)
}
return nil
}
func (b *boolValue) String() string {
if *b {
return "true"
}
return "false"
}
// Bool creates a flag option that is a bool. Bools normally do not take a
// value however one can be assigned by using the long form of the option:
//
// --option=true
// --o=false
//
// Its value is case insenstive and one of true, false, t, f, on, off, t and 0.
func Bool(name rune, helpvalue ...string) *bool {
return CommandLine.Bool(name, helpvalue...)
}
func (s *Set) Bool(name rune, helpvalue ...string) *bool {
var p bool
s.BoolVarLong(&p, "", name, helpvalue...)
return &p
}
func BoolLong(name string, short rune, helpvalue ...string) *bool {
return CommandLine.BoolLong(name, short, helpvalue...)
}
func (s *Set) BoolLong(name string, short rune, helpvalue ...string) *bool {
var p bool
s.BoolVarLong(&p, name, short, helpvalue...)
return &p
}
func BoolVar(p *bool, name rune, helpvalue ...string) Option {
return CommandLine.BoolVar(p, name, helpvalue...)
}
func (s *Set) BoolVar(p *bool, name rune, helpvalue ...string) Option {
return s.BoolVarLong(p, "", name, helpvalue...)
}
func BoolVarLong(p *bool, name string, short rune, helpvalue ...string) Option {
return CommandLine.BoolVarLong(p, name, short, helpvalue...)
}
func (s *Set) BoolVarLong(p *bool, name string, short rune, helpvalue ...string) Option {
return s.VarLong((*boolValue)(p), name, short, helpvalue...).SetFlag()
}
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