func unknown(obj types.Object) bool {
switch obj := obj.(type) {
case field:
fm, _, _ := types.LookupFieldOrMethod(obj.recv, obj.Pkg, obj.Name)
_, ok := fm.(*types.Var)
return !ok
case *types.Func:
if sig, ok := obj.Type.(*types.Signature); ok && sig.Recv != nil {
fm, _, _ := types.LookupFieldOrMethod(sig.Recv.Type, obj.Pkg, obj.Name)
_, ok := fm.(*types.Func)
return !ok
}
}
pkg := obj.GetPkg()
return pkg != nil && pkg.Scope().Lookup(obj.GetName()) == nil
}
func (r *reader) obj(x ast.Expr) types.Object {
switch x := x.(type) {
case *ast.Ident:
if obj := r.scope.LookupParent(x.Name); obj != nil {
if v, ok := obj.(*types.Var); ok && v.Pkg == nil { // ignore local vars
return nil
}
return obj
}
return unknownObject{pkg: r.pkg, name: x.Name}
case *ast.SelectorExpr:
// TODO: Type.Method and pkg.Type.Method
n1 := name(x.X)
n2 := x.Sel.Name
switch obj := r.scope.LookupParent(n1).(type) {
case *types.PkgName:
if obj := obj.Pkg.Scope().Lookup(n2); obj != nil {
return obj
}
return unknownObject{pkg: obj.Pkg, name: n2}
case *types.Var:
t := obj.Type
fm, _, addr := types.LookupFieldOrMethod(t, r.pkg, n2)
switch fm := fm.(type) {
case *types.Func:
sig := fm.Type.(*types.Signature)
return types.NewFunc(0, r.pkg, n2, types.NewSignature(nil, newVar("", t), sig.Params, sig.Results, sig.IsVariadic))
case *types.Var:
return field{fm, t, addr}
}
return unknownObject{pkg: obj.Pkg, recv: t, name: n2}
}
}
panic("unreachable")
}
