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uint.go
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73 lines (60 loc) · 1.31 KB
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package rig
import (
"flag"
"strconv"
"github.com/Pimmr/rig/validators"
)
type uintValidators struct {
*uintValue
validators []validators.Uint
}
func (v uintValidators) Set(s string) error {
err := v.uintValue.Set(s)
if err != nil {
return err
}
for _, validator := range v.validators {
err = validator(uint(*v.uintValue))
if err != nil {
return err
}
}
return nil
}
func (v uintValidators) New(i interface{}) flag.Value {
return uintValidators{
uintValue: (*uintValue)(i.(*uint)),
validators: v.validators,
}
}
func (v uintValidators) IsNil() bool {
return v.uintValue == nil
}
type uintValue uint
func (i uintValue) String() string {
return strconv.FormatUint(uint64(i), 10)
}
func (i *uintValue) Set(s string) error {
v, err := strconv.ParseUint(s, 0, strconv.IntSize)
*i = uintValue(v)
return err
}
// Uint creates a flag for a uint variable.
func Uint(v *uint, flag, env, usage string, validators ...validators.Uint) *Flag {
return &Flag{
Value: uintValidators{
uintValue: (*uintValue)(v),
validators: validators,
},
Name: flag,
Env: env,
Usage: usage,
TypeHint: "uint",
}
}
// UintGenerator is the default uint generator, to be used with Repeatable for uint slices.
func UintGenerator() Generator {
return func() flag.Value {
return new(uintValue)
}
}