claudeandClaude Sonnet 5
4e2e05c1b9
CI / test (pull_request) Successful in 34s
MinLength/MaxLength measured len(value), so a string of 8 accented characters (9+ bytes) failed MaxLength(8) despite the error message promising "characters". Count with utf8.RuneCountInString so the check matches the wording and the common-sense intent. Still not grapheme-cluster aware (combining marks, emoji ZWJ sequences count as several runes), which is out of scope for a stdlib-only helper. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
31 lines
827 B
Go
31 lines
827 B
Go
package validate
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import "unicode/utf8"
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var (
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ErrMustBeLonger = NewError("must contain at least %d characters")
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ErrMustBeShorter = NewError("must contain no more than %d characters")
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)
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// MaxLength validates that a string is no longer than a given maximum.
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// Length is counted in runes, so multi-byte characters count as one.
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func MaxLength(l int) func(string) error {
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return func(value string) error {
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if utf8.RuneCountInString(value) > l {
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return ErrMustBeShorter.With(l)
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}
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return nil
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}
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}
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// MinLength validates that a string is at least a given minimum length.
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// Length is counted in runes, so multi-byte characters count as one.
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func MinLength(l int) func(string) error {
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return func(value string) error {
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if utf8.RuneCountInString(value) < l {
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return ErrMustBeLonger.With(l)
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}
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return nil
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}
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}
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