// Bind attempts to bind the name in t to node. Errors are reported to report. func (b *Bindings) Bind(t xc.Token, node Node, report *xc.Report) { nm := t.Val if x := b.Map[nm]; x != nil { ok := false switch e := x.Node.(type) { case *ConstSpec, *Variable: case *ProcSpec: ok = e == nil default: panic("internal error") } if !ok { report.ErrTok(t, "redeclaration of %s at %s", xc.Dict.S(nm), position(x.Pos)) return } } b.Map[nm] = &Binding{node, t.Pos()} }