nswrap/ast/function_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

89 lines
2.3 KiB
Go

package ast
import (
"strings"
)
// FunctionDecl is node represents a function declaration.
type FunctionDecl struct {
Addr Address
Pos Position
Prev string
Parent string
Position2 string
Name string
Type string
Type2 string
IsExtern bool
IsImplicit bool
IsUsed bool
IsReferenced bool
IsStatic bool
IsInline bool
ChildNodes []Node
}
func parseFunctionDecl(line string) Node {
groups := groupsFromRegex(
`(?:parent (?P<parent>0x[0-9a-f]+) )?
(?:prev (?P<prev>0x[0-9a-f]+) )?
<(?P<position1>.*?)>
(?P<position2> <scratch space>[^ ]+| [^ ]+)?
(?P<implicit> implicit)?
(?P<used> used)?
(?P<referenced> referenced)?
(?P<name>[_\w]+)
'(?P<type>.*?)'
(:'(?P<type2>.*?)')?
(?P<extern> extern)?
(?P<static> static)?
(?P<inline> inline)?
`,
line,
)
if groups == nil {
return &Unknown{}
}
return &FunctionDecl{
Addr: ParseAddress(groups["address"]),
Pos: NewPositionFromString(groups["position1"]),
Parent: groups["parent"],
Prev: groups["prev"],
Position2: strings.TrimSpace(groups["position2"]),
Name: groups["name"],
Type: groups["type"],
Type2: groups["type2"],
IsExtern: len(groups["extern"]) > 0,
IsImplicit: len(groups["implicit"]) > 0,
IsUsed: len(groups["used"]) > 0,
IsReferenced: len(groups["referenced"]) > 0,
IsStatic: len(groups["static"]) > 0,
IsInline: len(groups["inline"]) > 0,
ChildNodes: []Node{},
}
}
// AddChild adds a new child node. Child nodes can then be accessed with the
// Children attribute.
func (n *FunctionDecl) 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 *FunctionDecl) 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 *FunctionDecl) Children() []Node {
return n.ChildNodes
}
// Position returns the position in the original source code.
func (n *FunctionDecl) Position() Position {
return n.Pos
}