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42 lines
723 B
Go
42 lines
723 B
Go
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// compile
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package p
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type Symbol interface{}
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type Value interface {
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String() string
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}
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type Object interface {
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String() string
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}
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type Scope struct {
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outer *Scope
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elems map[string]Object
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}
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func (s *Scope) findouter(name string) (*Scope, Object) {
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return s.outer.findouter(name)
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}
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func (s *Scope) Resolve(name string) (sym Symbol) {
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if _, obj := s.findouter(name); obj != nil {
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sym = obj.(Symbol)
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}
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return
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}
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type ScopeName struct {
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scope *Scope
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}
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func (n *ScopeName) Get(name string) (Value, error) {
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return n.scope.Resolve(name).(Value), nil
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}
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