--- /dev/null
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cache
+
+import (
+ "go/ast"
+ "go/types"
+
+ "golang.org/x/mod/module"
+ "golang.org/x/tools/internal/lsp/source"
+ "golang.org/x/tools/internal/span"
+ errors "golang.org/x/xerrors"
+)
+
+// pkg contains the type information needed by the source package.
+type pkg struct {
+ m *metadata
+ mode source.ParseMode
+ goFiles []*source.ParsedGoFile
+ compiledGoFiles []*source.ParsedGoFile
+ errors []*source.Error
+ imports map[packagePath]*pkg
+ version *module.Version
+ typeErrors []types.Error
+ types *types.Package
+ typesInfo *types.Info
+ typesSizes types.Sizes
+}
+
+// Declare explicit types for package paths, names, and IDs to ensure that we
+// never use an ID where a path belongs, and vice versa. If we confused these,
+// it would result in confusing errors because package IDs often look like
+// package paths.
+type (
+ packageID string
+ packagePath string
+ packageName string
+)
+
+// Declare explicit types for files and directories to distinguish between the two.
+type (
+ fileURI span.URI
+ moduleLoadScope string
+ viewLoadScope span.URI
+)
+
+func (p *pkg) ID() string {
+ return string(p.m.id)
+}
+
+func (p *pkg) Name() string {
+ return string(p.m.name)
+}
+
+func (p *pkg) PkgPath() string {
+ return string(p.m.pkgPath)
+}
+
+func (p *pkg) CompiledGoFiles() []*source.ParsedGoFile {
+ return p.compiledGoFiles
+}
+
+func (p *pkg) File(uri span.URI) (*source.ParsedGoFile, error) {
+ for _, cgf := range p.compiledGoFiles {
+ if cgf.URI == uri {
+ return cgf, nil
+ }
+ }
+ for _, gf := range p.goFiles {
+ if gf.URI == uri {
+ return gf, nil
+ }
+ }
+ return nil, errors.Errorf("no parsed file for %s in %v", uri, p.m.id)
+}
+
+func (p *pkg) GetSyntax() []*ast.File {
+ var syntax []*ast.File
+ for _, pgf := range p.compiledGoFiles {
+ syntax = append(syntax, pgf.File)
+ }
+ return syntax
+}
+
+func (p *pkg) GetErrors() []*source.Error {
+ return p.errors
+}
+
+func (p *pkg) GetTypes() *types.Package {
+ return p.types
+}
+
+func (p *pkg) GetTypesInfo() *types.Info {
+ return p.typesInfo
+}
+
+func (p *pkg) GetTypesSizes() types.Sizes {
+ return p.typesSizes
+}
+
+func (p *pkg) IsIllTyped() bool {
+ return p.types == nil || p.typesInfo == nil || p.typesSizes == nil
+}
+
+func (p *pkg) ForTest() string {
+ return string(p.m.forTest)
+}
+
+func (p *pkg) GetImport(pkgPath string) (source.Package, error) {
+ if imp := p.imports[packagePath(pkgPath)]; imp != nil {
+ return imp, nil
+ }
+ // Don't return a nil pointer because that still satisfies the interface.
+ return nil, errors.Errorf("no imported package for %s", pkgPath)
+}
+
+func (p *pkg) MissingDependencies() []string {
+ var md []string
+ for i := range p.m.missingDeps {
+ md = append(md, string(i))
+ }
+ return md
+}
+
+func (p *pkg) Imports() []source.Package {
+ var result []source.Package
+ for _, imp := range p.imports {
+ result = append(result, imp)
+ }
+ return result
+}
+
+func (p *pkg) Version() *module.Version {
+ return p.version
+}