func (p *importer) typ() types.Type { // if the type was seen before, i is its index (>= 0) i := p.int() if i >= 0 { return p.typList[i] } // otherwise, i is the type tag (< 0) switch i { case basicTag: t := types.Universe.Lookup(p.string()).(*types.TypeName).Type().(*types.Basic) p.record(t) return t case arrayTag: t := new(types.Array) p.record(t) n := p.int64() *t = *types.NewArray(p.typ(), n) return t case sliceTag: t := new(types.Slice) p.record(t) *t = *types.NewSlice(p.typ()) return t case structTag: t := new(types.Struct) p.record(t) n := p.int() fields := make([]*types.Var, n) tags := make([]string, n) for i := range fields { fields[i] = p.field() tags[i] = p.string() } *t = *types.NewStruct(fields, tags) return t case pointerTag: t := new(types.Pointer) p.record(t) *t = *types.NewPointer(p.typ()) return t case signatureTag: t := new(types.Signature) p.record(t) *t = *p.signature() return t case interfaceTag: t := new(types.Interface) p.record(t) // read embedded interfaces embeddeds := make([]*types.Named, p.int()) for i := range embeddeds { embeddeds[i] = p.typ().(*types.Named) } // read methods methods := make([]*types.Func, p.int()) for i := range methods { pkg, name := p.qualifiedName() methods[i] = types.NewFunc(token.NoPos, pkg, name, p.typ().(*types.Signature)) } *t = *types.NewInterface(methods, embeddeds) return t case mapTag: t := new(types.Map) p.record(t) *t = *types.NewMap(p.typ(), p.typ()) return t case chanTag: t := new(types.Chan) p.record(t) *t = *types.NewChan(types.ChanDir(p.int()), p.typ()) return t case namedTag: // import type object name := p.string() pkg := p.pkg() scope := pkg.Scope() obj := scope.Lookup(name) if obj == nil { new := types.NewTypeName(token.NoPos, pkg, name, nil) types.NewNamed(new, nil, nil) scope.Insert(new) obj = new } t := obj.Type().(*types.Named) p.record(t) // import underlying type u := p.typ() if t.Underlying() == nil { t.SetUnderlying(u) } // read associated methods n := p.int() for i := 0; i < n; i++ { t.AddMethod(types.NewFunc(token.NoPos, pkg, p.string(), p.typ().(*types.Signature))) } return t default: panic(fmt.Sprintf("unexpected type tag %d", i)) } }