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// Copyright 2017 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package ast
import (
"fmt"
)
// Walk calls callback cb for every node in AST.
func Walk(desc *Description, cb func(n Node)) {
for _, n := range desc.Nodes {
WalkNode(n, cb)
}
}
func WalkNode(n0 Node, cb func(n Node)) {
cb(n0)
switch n := n0.(type) {
case *NewLine:
case *Comment:
case *Include:
WalkNode(n.File, cb)
case *Incdir:
WalkNode(n.Dir, cb)
case *Define:
WalkNode(n.Name, cb)
WalkNode(n.Value, cb)
case *Resource:
WalkNode(n.Name, cb)
WalkNode(n.Base, cb)
for _, v := range n.Values {
WalkNode(v, cb)
}
case *TypeDef:
WalkNode(n.Name, cb)
WalkNode(n.Type, cb)
case *Call:
WalkNode(n.Name, cb)
for _, f := range n.Args {
WalkNode(f, cb)
}
if n.Ret != nil {
WalkNode(n.Ret, cb)
}
case *Struct:
WalkNode(n.Name, cb)
for _, f := range n.Fields {
WalkNode(f, cb)
}
for _, a := range n.Attrs {
WalkNode(a, cb)
}
for _, c := range n.Comments {
WalkNode(c, cb)
}
case *IntFlags:
WalkNode(n.Name, cb)
for _, v := range n.Values {
WalkNode(v, cb)
}
case *StrFlags:
WalkNode(n.Name, cb)
for _, v := range n.Values {
WalkNode(v, cb)
}
case *Ident:
case *String:
case *Int:
case *Type:
for _, t := range n.Args {
WalkNode(t, cb)
}
case *Field:
WalkNode(n.Name, cb)
WalkNode(n.Type, cb)
for _, c := range n.Comments {
WalkNode(c, cb)
}
default:
panic(fmt.Sprintf("unknown AST node: %#v", n))
}
}
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