Aneurin Barker Snook
25 lines
443 B
Go
25 lines
443 B
Go
package validate
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import (
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"errors"
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"strings"
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)
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// Validation error.
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var (
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ErrDisallowedChars = errors.New("contains disallowed characters")
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)
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// Chars validates whether a string contains only allowed characters.
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func Chars(allow string) func(string) error {
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return func(value string) error {
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rs := []rune(value)
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for _, r := range rs {
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if !strings.ContainsRune(allow, r) {
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return ErrDisallowedChars
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}
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}
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return nil
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}
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}
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