aneurinandClaude Sonnet 5
82611a5e96
Broadens the built-in set with the string/presence checks that came up most often when reaching for this package: - Required[T comparable] non-zero value - Prefix / Suffix / Contains strings.HasPrefix/HasSuffix/Contains - Match(*regexp.Regexp) arbitrary pattern All follow the existing shape: a constructor returning func(T) error, a sentinel error matched with errors.Is, table-driven tests and an Example. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
21 lines
401 B
Go
21 lines
401 B
Go
package validate
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import (
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"regexp"
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)
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var (
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ErrNoMatch = NewError("invalid format")
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)
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// Match validates that a string matches a regular expression. Compile the
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// expression once with regexp.MustCompile and reuse the returned validator.
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func Match(re *regexp.Regexp) func(string) error {
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return func(value string) error {
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if !re.MatchString(value) {
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return ErrNoMatch
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}
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return nil
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}
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}
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