nswrap/ast/var_decl.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

96 lines
2.3 KiB
Go

package ast
import (
"strings"
)
// VarDecl is node represents a variable declaration.
type VarDecl struct {
Addr Address
Parent Address
Pos Position
Position2 string
Name string
Type string
Type2 string
IsExtern bool
IsUsed bool
IsRange bool
IsCInit bool
IsReferenced bool
IsStatic bool
IsRegister bool
ChildNodes []Node
}
func parseVarDecl(line string) Node {
groups := groupsFromRegex(
`(?:prev (?P<prev>0x[0-9a-f]+) )?
(?:parent (?P<parent>0x[0-9a-f]+) )?
<(?P<position>.*)>(?P<position2> .+:\d+)?
(?P<used> used)?
(?P<range> range)?
(?P<referenced> referenced)?
(?P<name> \w+)?
'(?P<type>.+?)'
(?P<type2>:'.*?')?
(?P<extern> extern)?
(?P<static> static)?
(?P<cinit> cinit)?
(?P<register> register)?
(.*)
`,
line,
)
if groups == nil {
return &Unknown{}
}
type2 := groups["type2"]
if type2 != "" {
type2 = type2[2 : len(type2)-1]
}
return &VarDecl{
Addr: ParseAddress(groups["address"]),
Parent: ParseAddress(groups["parent"]),
Pos: NewPositionFromString(groups["position"]),
Position2: strings.TrimSpace(groups["position2"]),
Name: strings.TrimSpace(groups["name"]),
Type: groups["type"],
Type2: type2,
IsExtern: len(groups["extern"]) > 0,
IsUsed: len(groups["used"]) > 0,
IsRange: len(groups["range"]) > 0,
IsCInit: len(groups["cinit"]) > 0,
IsReferenced: len(groups["referenced"]) > 0,
IsStatic: len(groups["static"]) > 0,
IsRegister: len(groups["register"]) > 0,
ChildNodes: []Node{},
}
}
// AddChild adds a new child node. Child nodes can then be accessed with the
// Children attribute.
func (n *VarDecl) 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 *VarDecl) 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 *VarDecl) Children() []Node {
return n.ChildNodes
}
// Position returns the position in the original source code.
func (n *VarDecl) Position() Position {
return n.Pos
}