Method Find

expr/attribute.go:588–615

Find finds a child attribute with the given name in the attribute and its bases and references. If the parent attribute is not an object, it returns nil.

(name string)

// its bases and references. If the parent attribute is not an object, it
// returns nil.
func (a *AttributeExpr) Find(name string) *AttributeExpr {
	findAttrFn := func(typ DataType) *AttributeExpr {
		switch t := typ.(type) {
		case UserType:
			return t.Attribute().Find(name)
		case *Object:
			if att := t.Attribute(name); att != nil {
				return att
			}
		}
		return nil
	}

	if att := findAttrFn(a.Type); att != nil {
		return att
	}
	for _, b := range a.Bases {
		if att := findAttrFn(b); att != nil {
			return att
		}
	}
	for _, ref := range a.References {
		if att := findAttrFn(ref); att != nil {
			return att
		}
	}
	return nil
}

// Delete removes an attribute with the given name. It does nothing if the
// attribute expression is not an object type.