Function Pattern

dsl/validation.go:173–189

Pattern adds a "pattern" validation to the attribute. See http://json-schema.org/latest/json-schema-validation.html#anchor33. Example: Attribute("pattern", String, func() { Pattern("^[A-Z].*[0-9]$") })

(p string)

//	    Pattern("^[A-Z].*[0-9]$")
//	})
func Pattern(p string) {
	if a, ok := eval.Current().(*expr.AttributeExpr); ok {
		if a.Type != nil && a.Type.Kind() != expr.StringKind {
			incompatibleAttributeType("pattern", a.Type.Name(), "a string")
		} else {
			_, err := regexp.Compile(p)
			if err != nil {
				eval.ReportError("invalid pattern %#v, %s", p, err)
			} else {
				if a.Validation == nil {
					a.Validation = &expr.ValidationExpr{}
				}
				a.Validation.Pattern = p
			}
		}
	}
}

// ExclusiveMinimum adds a "exclusiveMinimum" validation to the attribute.
// See http://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.6.2.5.