nswrap/ast/pure_attr.go
Greg d8552bcf9d Use strict unmarshal for configuration file, to detect typos in
config directives. Do not panic on failed regexp in AST parsing,
instead return &ast.Unknown{} for further debugging. Add debutast:
directive to print context when AST nodes are not recognized.
2019-06-03 11:07:12 -04:00

55 lines
1.4 KiB
Go

package ast
// PureAttr is a type of attribute that is optionally attached to a variable
// or struct field definition.
type PureAttr struct {
Addr Address
Pos Position
Implicit bool
Inherited bool
ChildNodes []Node
}
func parsePureAttr(line string) Node {
groups := groupsFromRegex(
`<(?P<position>.*)>
(?P<inherited> Inherited)?
(?P<implicit> Implicit)?`,
line,
)
if groups == nil {
return &Unknown{}
}
return &PureAttr{
Addr: ParseAddress(groups["address"]),
Pos: NewPositionFromString(groups["position"]),
Implicit: len(groups["implicit"]) > 0,
Inherited: len(groups["inherited"]) > 0,
ChildNodes: []Node{},
}
}
// AddChild adds a new child node. Child nodes can then be accessed with the
// Children attribute.
func (n *PureAttr) AddChild(node Node) {
n.ChildNodes = append(n.ChildNodes, node)
}
// Address returns the numeric address of the node. See the documentation for
// the Address type for more information.
func (n *PureAttr) Address() Address {
return n.Addr
}
// Children returns the child nodes. If this node does not have any children or
// this node does not support children it will always return an empty slice.
func (n *PureAttr) Children() []Node {
return n.ChildNodes
}
// Position returns the position in the original source code.
func (n *PureAttr) Position() Position {
return n.Pos
}