nswrap/ast/unary_operator.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

64 lines
1.6 KiB
Go

package ast
// UnaryOperator is type of unary operator
type UnaryOperator struct {
Addr Address
Pos Position
Type string
Type2 string
IsLvalue bool
IsPrefix bool
Operator string
ChildNodes []Node
}
func parseUnaryOperator(line string) Node {
groups := groupsFromRegex(
`<(?P<position>.*)>
'(?P<type>.*?)'(:'(?P<type2>.*)')?
(?P<lvalue> lvalue)?
(?P<prefix> prefix)?
(?P<postfix> postfix)?
'(?P<operator>.*?)'
( .*)?`,
line,
)
if groups == nil {
return &Unknown{}
}
return &UnaryOperator{
Addr: ParseAddress(groups["address"]),
Pos: NewPositionFromString(groups["position"]),
Type: groups["type"],
Type2: groups["type2"],
IsLvalue: len(groups["lvalue"]) > 0,
IsPrefix: len(groups["prefix"]) > 0,
Operator: groups["operator"],
ChildNodes: []Node{},
}
}
// AddChild adds a new child node. Child nodes can then be accessed with the
// Children attribute.
func (n *UnaryOperator) 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 *UnaryOperator) 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 *UnaryOperator) Children() []Node {
return n.ChildNodes
}
// Position returns the position in the original source code.
func (n *UnaryOperator) Position() Position {
return n.Pos
}