validator

type CustomTypeFunc = func(field reflect.Value) any

type ValidationRule struct {
	RuleTag                  string                         // RuleTag is the unique identifier for the validation rule (used in struct tags)
	ErrMessageTemplate       string                         // ErrMessageTemplate is the error message template with placeholders like {0}, {1} (used as fallback)
	ErrMessageI18nKey        string                         // ErrMessageI18nKey is the i18n key for the error message (optional, takes precedence over ErrMessageTemplate)
	Validate                 func(fl v.FieldLevel) bool     // Validate performs the actual validation logic and returns true if valid
	ParseParam               func(fe v.FieldError) []string // ParseParam extracts parameters from FieldError for error message formatting
	CallValidationEvenIfNull bool                           // CallValidationEvenIfNull determines whether to validate nil/zero values
}