diff options
Diffstat (limited to 'vendor/golang.org/x/tools/internal/gcimporter')
11 files changed, 0 insertions, 3765 deletions
diff --git a/vendor/golang.org/x/tools/internal/gcimporter/bimport.go b/vendor/golang.org/x/tools/internal/gcimporter/bimport.go deleted file mode 100644 index d98b0db..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/bimport.go +++ /dev/null @@ -1,150 +0,0 @@ -// Copyright 2015 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. - -// This file contains the remaining vestiges of -// $GOROOT/src/go/internal/gcimporter/bimport.go. - -package gcimporter - -import ( - "fmt" - "go/token" - "go/types" - "sync" -) - -func errorf(format string, args ...interface{}) { - panic(fmt.Sprintf(format, args...)) -} - -const deltaNewFile = -64 // see cmd/compile/internal/gc/bexport.go - -// Synthesize a token.Pos -type fakeFileSet struct { - fset *token.FileSet - files map[string]*fileInfo -} - -type fileInfo struct { - file *token.File - lastline int -} - -const maxlines = 64 * 1024 - -func (s *fakeFileSet) pos(file string, line, column int) token.Pos { - // TODO(mdempsky): Make use of column. - - // Since we don't know the set of needed file positions, we reserve maxlines - // positions per file. We delay calling token.File.SetLines until all - // positions have been calculated (by way of fakeFileSet.setLines), so that - // we can avoid setting unnecessary lines. See also golang/go#46586. - f := s.files[file] - if f == nil { - f = &fileInfo{file: s.fset.AddFile(file, -1, maxlines)} - s.files[file] = f - } - if line > maxlines { - line = 1 - } - if line > f.lastline { - f.lastline = line - } - - // Return a fake position assuming that f.file consists only of newlines. - return token.Pos(f.file.Base() + line - 1) -} - -func (s *fakeFileSet) setLines() { - fakeLinesOnce.Do(func() { - fakeLines = make([]int, maxlines) - for i := range fakeLines { - fakeLines[i] = i - } - }) - for _, f := range s.files { - f.file.SetLines(fakeLines[:f.lastline]) - } -} - -var ( - fakeLines []int - fakeLinesOnce sync.Once -) - -func chanDir(d int) types.ChanDir { - // tag values must match the constants in cmd/compile/internal/gc/go.go - switch d { - case 1 /* Crecv */ : - return types.RecvOnly - case 2 /* Csend */ : - return types.SendOnly - case 3 /* Cboth */ : - return types.SendRecv - default: - errorf("unexpected channel dir %d", d) - return 0 - } -} - -var predeclOnce sync.Once -var predecl []types.Type // initialized lazily - -func predeclared() []types.Type { - predeclOnce.Do(func() { - // initialize lazily to be sure that all - // elements have been initialized before - predecl = []types.Type{ // basic types - types.Typ[types.Bool], - types.Typ[types.Int], - types.Typ[types.Int8], - types.Typ[types.Int16], - types.Typ[types.Int32], - types.Typ[types.Int64], - types.Typ[types.Uint], - types.Typ[types.Uint8], - types.Typ[types.Uint16], - types.Typ[types.Uint32], - types.Typ[types.Uint64], - types.Typ[types.Uintptr], - types.Typ[types.Float32], - types.Typ[types.Float64], - types.Typ[types.Complex64], - types.Typ[types.Complex128], - types.Typ[types.String], - - // basic type aliases - types.Universe.Lookup("byte").Type(), - types.Universe.Lookup("rune").Type(), - - // error - types.Universe.Lookup("error").Type(), - - // untyped types - types.Typ[types.UntypedBool], - types.Typ[types.UntypedInt], - types.Typ[types.UntypedRune], - types.Typ[types.UntypedFloat], - types.Typ[types.UntypedComplex], - types.Typ[types.UntypedString], - types.Typ[types.UntypedNil], - - // package unsafe - types.Typ[types.UnsafePointer], - - // invalid type - types.Typ[types.Invalid], // only appears in packages with errors - - // used internally by gc; never used by this package or in .a files - anyType{}, - } - predecl = append(predecl, additionalPredeclared()...) - }) - return predecl -} - -type anyType struct{} - -func (t anyType) Underlying() types.Type { return t } -func (t anyType) String() string { return "any" } diff --git a/vendor/golang.org/x/tools/internal/gcimporter/exportdata.go b/vendor/golang.org/x/tools/internal/gcimporter/exportdata.go deleted file mode 100644 index f6437fe..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/exportdata.go +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2011 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. - -// This file is a copy of $GOROOT/src/go/internal/gcimporter/exportdata.go. - -// This file implements FindExportData. - -package gcimporter - -import ( - "bufio" - "fmt" - "io" - "strconv" - "strings" -) - -func readGopackHeader(r *bufio.Reader) (name string, size int64, err error) { - // See $GOROOT/include/ar.h. - hdr := make([]byte, 16+12+6+6+8+10+2) - _, err = io.ReadFull(r, hdr) - if err != nil { - return - } - // leave for debugging - if false { - fmt.Printf("header: %s", hdr) - } - s := strings.TrimSpace(string(hdr[16+12+6+6+8:][:10])) - length, err := strconv.Atoi(s) - size = int64(length) - if err != nil || hdr[len(hdr)-2] != '`' || hdr[len(hdr)-1] != '\n' { - err = fmt.Errorf("invalid archive header") - return - } - name = strings.TrimSpace(string(hdr[:16])) - return -} - -// FindExportData positions the reader r at the beginning of the -// export data section of an underlying GC-created object/archive -// file by reading from it. The reader must be positioned at the -// start of the file before calling this function. The hdr result -// is the string before the export data, either "$$" or "$$B". -// The size result is the length of the export data in bytes, or -1 if not known. -func FindExportData(r *bufio.Reader) (hdr string, size int64, err error) { - // Read first line to make sure this is an object file. - line, err := r.ReadSlice('\n') - if err != nil { - err = fmt.Errorf("can't find export data (%v)", err) - return - } - - if string(line) == "!<arch>\n" { - // Archive file. Scan to __.PKGDEF. - var name string - if name, size, err = readGopackHeader(r); err != nil { - return - } - - // First entry should be __.PKGDEF. - if name != "__.PKGDEF" { - err = fmt.Errorf("go archive is missing __.PKGDEF") - return - } - - // Read first line of __.PKGDEF data, so that line - // is once again the first line of the input. - if line, err = r.ReadSlice('\n'); err != nil { - err = fmt.Errorf("can't find export data (%v)", err) - return - } - size -= int64(len(line)) - } - - // Now at __.PKGDEF in archive or still at beginning of file. - // Either way, line should begin with "go object ". - if !strings.HasPrefix(string(line), "go object ") { - err = fmt.Errorf("not a Go object file") - return - } - - // Skip over object header to export data. - // Begins after first line starting with $$. - for line[0] != '$' { - if line, err = r.ReadSlice('\n'); err != nil { - err = fmt.Errorf("can't find export data (%v)", err) - return - } - size -= int64(len(line)) - } - hdr = string(line) - if size < 0 { - size = -1 - } - - return -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/gcimporter.go b/vendor/golang.org/x/tools/internal/gcimporter/gcimporter.go deleted file mode 100644 index 39df911..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/gcimporter.go +++ /dev/null @@ -1,266 +0,0 @@ -// Copyright 2011 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. - -// This file is a reduced copy of $GOROOT/src/go/internal/gcimporter/gcimporter.go. - -// Package gcimporter provides various functions for reading -// gc-generated object files that can be used to implement the -// Importer interface defined by the Go 1.5 standard library package. -// -// The encoding is deterministic: if the encoder is applied twice to -// the same types.Package data structure, both encodings are equal. -// This property may be important to avoid spurious changes in -// applications such as build systems. -// -// However, the encoder is not necessarily idempotent. Importing an -// exported package may yield a types.Package that, while it -// represents the same set of Go types as the original, may differ in -// the details of its internal representation. Because of these -// differences, re-encoding the imported package may yield a -// different, but equally valid, encoding of the package. -package gcimporter // import "golang.org/x/tools/internal/gcimporter" - -import ( - "bufio" - "bytes" - "fmt" - "go/build" - "go/token" - "go/types" - "io" - "os" - "os/exec" - "path/filepath" - "strings" - "sync" -) - -const ( - // Enable debug during development: it adds some additional checks, and - // prevents errors from being recovered. - debug = false - - // If trace is set, debugging output is printed to std out. - trace = false -) - -var exportMap sync.Map // package dir → func() (string, bool) - -// lookupGorootExport returns the location of the export data -// (normally found in the build cache, but located in GOROOT/pkg -// in prior Go releases) for the package located in pkgDir. -// -// (We use the package's directory instead of its import path -// mainly to simplify handling of the packages in src/vendor -// and cmd/vendor.) -func lookupGorootExport(pkgDir string) (string, bool) { - f, ok := exportMap.Load(pkgDir) - if !ok { - var ( - listOnce sync.Once - exportPath string - ) - f, _ = exportMap.LoadOrStore(pkgDir, func() (string, bool) { - listOnce.Do(func() { - cmd := exec.Command("go", "list", "-export", "-f", "{{.Export}}", pkgDir) - cmd.Dir = build.Default.GOROOT - var output []byte - output, err := cmd.Output() - if err != nil { - return - } - - exports := strings.Split(string(bytes.TrimSpace(output)), "\n") - if len(exports) != 1 { - return - } - - exportPath = exports[0] - }) - - return exportPath, exportPath != "" - }) - } - - return f.(func() (string, bool))() -} - -var pkgExts = [...]string{".a", ".o"} - -// FindPkg returns the filename and unique package id for an import -// path based on package information provided by build.Import (using -// the build.Default build.Context). A relative srcDir is interpreted -// relative to the current working directory. -// If no file was found, an empty filename is returned. -func FindPkg(path, srcDir string) (filename, id string) { - if path == "" { - return - } - - var noext string - switch { - default: - // "x" -> "$GOPATH/pkg/$GOOS_$GOARCH/x.ext", "x" - // Don't require the source files to be present. - if abs, err := filepath.Abs(srcDir); err == nil { // see issue 14282 - srcDir = abs - } - bp, _ := build.Import(path, srcDir, build.FindOnly|build.AllowBinary) - if bp.PkgObj == "" { - var ok bool - if bp.Goroot && bp.Dir != "" { - filename, ok = lookupGorootExport(bp.Dir) - } - if !ok { - id = path // make sure we have an id to print in error message - return - } - } else { - noext = strings.TrimSuffix(bp.PkgObj, ".a") - id = bp.ImportPath - } - - case build.IsLocalImport(path): - // "./x" -> "/this/directory/x.ext", "/this/directory/x" - noext = filepath.Join(srcDir, path) - id = noext - - case filepath.IsAbs(path): - // for completeness only - go/build.Import - // does not support absolute imports - // "/x" -> "/x.ext", "/x" - noext = path - id = path - } - - if false { // for debugging - if path != id { - fmt.Printf("%s -> %s\n", path, id) - } - } - - if filename != "" { - if f, err := os.Stat(filename); err == nil && !f.IsDir() { - return - } - } - - // try extensions - for _, ext := range pkgExts { - filename = noext + ext - if f, err := os.Stat(filename); err == nil && !f.IsDir() { - return - } - } - - filename = "" // not found - return -} - -// Import imports a gc-generated package given its import path and srcDir, adds -// the corresponding package object to the packages map, and returns the object. -// The packages map must contain all packages already imported. -func Import(packages map[string]*types.Package, path, srcDir string, lookup func(path string) (io.ReadCloser, error)) (pkg *types.Package, err error) { - var rc io.ReadCloser - var filename, id string - if lookup != nil { - // With custom lookup specified, assume that caller has - // converted path to a canonical import path for use in the map. - if path == "unsafe" { - return types.Unsafe, nil - } - id = path - - // No need to re-import if the package was imported completely before. - if pkg = packages[id]; pkg != nil && pkg.Complete() { - return - } - f, err := lookup(path) - if err != nil { - return nil, err - } - rc = f - } else { - filename, id = FindPkg(path, srcDir) - if filename == "" { - if path == "unsafe" { - return types.Unsafe, nil - } - return nil, fmt.Errorf("can't find import: %q", id) - } - - // no need to re-import if the package was imported completely before - if pkg = packages[id]; pkg != nil && pkg.Complete() { - return - } - - // open file - f, err := os.Open(filename) - if err != nil { - return nil, err - } - defer func() { - if err != nil { - // add file name to error - err = fmt.Errorf("%s: %v", filename, err) - } - }() - rc = f - } - defer rc.Close() - - var hdr string - var size int64 - buf := bufio.NewReader(rc) - if hdr, size, err = FindExportData(buf); err != nil { - return - } - - switch hdr { - case "$$B\n": - var data []byte - data, err = io.ReadAll(buf) - if err != nil { - break - } - - // TODO(gri): allow clients of go/importer to provide a FileSet. - // Or, define a new standard go/types/gcexportdata package. - fset := token.NewFileSet() - - // Select appropriate importer. - if len(data) > 0 { - switch data[0] { - case 'v', 'c', 'd': // binary, till go1.10 - return nil, fmt.Errorf("binary (%c) import format is no longer supported", data[0]) - - case 'i': // indexed, till go1.19 - _, pkg, err := IImportData(fset, packages, data[1:], id) - return pkg, err - - case 'u': // unified, from go1.20 - _, pkg, err := UImportData(fset, packages, data[1:size], id) - return pkg, err - - default: - l := len(data) - if l > 10 { - l = 10 - } - return nil, fmt.Errorf("unexpected export data with prefix %q for path %s", string(data[:l]), id) - } - } - - default: - err = fmt.Errorf("unknown export data header: %q", hdr) - } - - return -} - -type byPath []*types.Package - -func (a byPath) Len() int { return len(a) } -func (a byPath) Swap(i, j int) { a[i], a[j] = a[j], a[i] } -func (a byPath) Less(i, j int) bool { return a[i].Path() < a[j].Path() } diff --git a/vendor/golang.org/x/tools/internal/gcimporter/iexport.go b/vendor/golang.org/x/tools/internal/gcimporter/iexport.go deleted file mode 100644 index deeb67f..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/iexport.go +++ /dev/null @@ -1,1332 +0,0 @@ -// 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. - -// Indexed binary package export. -// This file was derived from $GOROOT/src/cmd/compile/internal/gc/iexport.go; -// see that file for specification of the format. - -package gcimporter - -import ( - "bytes" - "encoding/binary" - "fmt" - "go/constant" - "go/token" - "go/types" - "io" - "math/big" - "reflect" - "sort" - "strconv" - "strings" - - "golang.org/x/tools/go/types/objectpath" - "golang.org/x/tools/internal/aliases" - "golang.org/x/tools/internal/tokeninternal" -) - -// IExportShallow encodes "shallow" export data for the specified package. -// -// No promises are made about the encoding other than that it can be decoded by -// the same version of IIExportShallow. If you plan to save export data in the -// file system, be sure to include a cryptographic digest of the executable in -// the key to avoid version skew. -// -// If the provided reportf func is non-nil, it will be used for reporting bugs -// encountered during export. -// TODO(rfindley): remove reportf when we are confident enough in the new -// objectpath encoding. -func IExportShallow(fset *token.FileSet, pkg *types.Package, reportf ReportFunc) ([]byte, error) { - // In principle this operation can only fail if out.Write fails, - // but that's impossible for bytes.Buffer---and as a matter of - // fact iexportCommon doesn't even check for I/O errors. - // TODO(adonovan): handle I/O errors properly. - // TODO(adonovan): use byte slices throughout, avoiding copying. - const bundle, shallow = false, true - var out bytes.Buffer - err := iexportCommon(&out, fset, bundle, shallow, iexportVersion, []*types.Package{pkg}) - return out.Bytes(), err -} - -// IImportShallow decodes "shallow" types.Package data encoded by -// IExportShallow in the same executable. This function cannot import data from -// cmd/compile or gcexportdata.Write. -// -// The importer calls getPackages to obtain package symbols for all -// packages mentioned in the export data, including the one being -// decoded. -// -// If the provided reportf func is non-nil, it will be used for reporting bugs -// encountered during import. -// TODO(rfindley): remove reportf when we are confident enough in the new -// objectpath encoding. -func IImportShallow(fset *token.FileSet, getPackages GetPackagesFunc, data []byte, path string, reportf ReportFunc) (*types.Package, error) { - const bundle = false - const shallow = true - pkgs, err := iimportCommon(fset, getPackages, data, bundle, path, shallow, reportf) - if err != nil { - return nil, err - } - return pkgs[0], nil -} - -// ReportFunc is the type of a function used to report formatted bugs. -type ReportFunc = func(string, ...interface{}) - -// Current bundled export format version. Increase with each format change. -// 0: initial implementation -const bundleVersion = 0 - -// IExportData writes indexed export data for pkg to out. -// -// If no file set is provided, position info will be missing. -// The package path of the top-level package will not be recorded, -// so that calls to IImportData can override with a provided package path. -func IExportData(out io.Writer, fset *token.FileSet, pkg *types.Package) error { - const bundle, shallow = false, false - return iexportCommon(out, fset, bundle, shallow, iexportVersion, []*types.Package{pkg}) -} - -// IExportBundle writes an indexed export bundle for pkgs to out. -func IExportBundle(out io.Writer, fset *token.FileSet, pkgs []*types.Package) error { - const bundle, shallow = true, false - return iexportCommon(out, fset, bundle, shallow, iexportVersion, pkgs) -} - -func iexportCommon(out io.Writer, fset *token.FileSet, bundle, shallow bool, version int, pkgs []*types.Package) (err error) { - if !debug { - defer func() { - if e := recover(); e != nil { - if ierr, ok := e.(internalError); ok { - err = ierr - return - } - // Not an internal error; panic again. - panic(e) - } - }() - } - - p := iexporter{ - fset: fset, - version: version, - shallow: shallow, - allPkgs: map[*types.Package]bool{}, - stringIndex: map[string]uint64{}, - declIndex: map[types.Object]uint64{}, - tparamNames: map[types.Object]string{}, - typIndex: map[types.Type]uint64{}, - } - if !bundle { - p.localpkg = pkgs[0] - } - - for i, pt := range predeclared() { - p.typIndex[pt] = uint64(i) - } - if len(p.typIndex) > predeclReserved { - panic(internalErrorf("too many predeclared types: %d > %d", len(p.typIndex), predeclReserved)) - } - - // Initialize work queue with exported declarations. - for _, pkg := range pkgs { - scope := pkg.Scope() - for _, name := range scope.Names() { - if token.IsExported(name) { - p.pushDecl(scope.Lookup(name)) - } - } - - if bundle { - // Ensure pkg and its imports are included in the index. - p.allPkgs[pkg] = true - for _, imp := range pkg.Imports() { - p.allPkgs[imp] = true - } - } - } - - // Loop until no more work. - for !p.declTodo.empty() { - p.doDecl(p.declTodo.popHead()) - } - - // Produce index of offset of each file record in files. - var files intWriter - var fileOffset []uint64 // fileOffset[i] is offset in files of file encoded as i - if p.shallow { - fileOffset = make([]uint64, len(p.fileInfos)) - for i, info := range p.fileInfos { - fileOffset[i] = uint64(files.Len()) - p.encodeFile(&files, info.file, info.needed) - } - } - - // Append indices to data0 section. - dataLen := uint64(p.data0.Len()) - w := p.newWriter() - w.writeIndex(p.declIndex) - - if bundle { - w.uint64(uint64(len(pkgs))) - for _, pkg := range pkgs { - w.pkg(pkg) - imps := pkg.Imports() - w.uint64(uint64(len(imps))) - for _, imp := range imps { - w.pkg(imp) - } - } - } - w.flush() - - // Assemble header. - var hdr intWriter - if bundle { - hdr.uint64(bundleVersion) - } - hdr.uint64(uint64(p.version)) - hdr.uint64(uint64(p.strings.Len())) - if p.shallow { - hdr.uint64(uint64(files.Len())) - hdr.uint64(uint64(len(fileOffset))) - for _, offset := range fileOffset { - hdr.uint64(offset) - } - } - hdr.uint64(dataLen) - - // Flush output. - io.Copy(out, &hdr) - io.Copy(out, &p.strings) - if p.shallow { - io.Copy(out, &files) - } - io.Copy(out, &p.data0) - - return nil -} - -// encodeFile writes to w a representation of the file sufficient to -// faithfully restore position information about all needed offsets. -// Mutates the needed array. -func (p *iexporter) encodeFile(w *intWriter, file *token.File, needed []uint64) { - _ = needed[0] // precondition: needed is non-empty - - w.uint64(p.stringOff(file.Name())) - - size := uint64(file.Size()) - w.uint64(size) - - // Sort the set of needed offsets. Duplicates are harmless. - sort.Slice(needed, func(i, j int) bool { return needed[i] < needed[j] }) - - lines := tokeninternal.GetLines(file) // byte offset of each line start - w.uint64(uint64(len(lines))) - - // Rather than record the entire array of line start offsets, - // we save only a sparse list of (index, offset) pairs for - // the start of each line that contains a needed position. - var sparse [][2]int // (index, offset) pairs -outer: - for i, lineStart := range lines { - lineEnd := size - if i < len(lines)-1 { - lineEnd = uint64(lines[i+1]) - } - // Does this line contains a needed offset? - if needed[0] < lineEnd { - sparse = append(sparse, [2]int{i, lineStart}) - for needed[0] < lineEnd { - needed = needed[1:] - if len(needed) == 0 { - break outer - } - } - } - } - - // Delta-encode the columns. - w.uint64(uint64(len(sparse))) - var prev [2]int - for _, pair := range sparse { - w.uint64(uint64(pair[0] - prev[0])) - w.uint64(uint64(pair[1] - prev[1])) - prev = pair - } -} - -// writeIndex writes out an object index. mainIndex indicates whether -// we're writing out the main index, which is also read by -// non-compiler tools and includes a complete package description -// (i.e., name and height). -func (w *exportWriter) writeIndex(index map[types.Object]uint64) { - type pkgObj struct { - obj types.Object - name string // qualified name; differs from obj.Name for type params - } - // Build a map from packages to objects from that package. - pkgObjs := map[*types.Package][]pkgObj{} - - // For the main index, make sure to include every package that - // we reference, even if we're not exporting (or reexporting) - // any symbols from it. - if w.p.localpkg != nil { - pkgObjs[w.p.localpkg] = nil - } - for pkg := range w.p.allPkgs { - pkgObjs[pkg] = nil - } - - for obj := range index { - name := w.p.exportName(obj) - pkgObjs[obj.Pkg()] = append(pkgObjs[obj.Pkg()], pkgObj{obj, name}) - } - - var pkgs []*types.Package - for pkg, objs := range pkgObjs { - pkgs = append(pkgs, pkg) - - sort.Slice(objs, func(i, j int) bool { - return objs[i].name < objs[j].name - }) - } - - sort.Slice(pkgs, func(i, j int) bool { - return w.exportPath(pkgs[i]) < w.exportPath(pkgs[j]) - }) - - w.uint64(uint64(len(pkgs))) - for _, pkg := range pkgs { - w.string(w.exportPath(pkg)) - w.string(pkg.Name()) - w.uint64(uint64(0)) // package height is not needed for go/types - - objs := pkgObjs[pkg] - w.uint64(uint64(len(objs))) - for _, obj := range objs { - w.string(obj.name) - w.uint64(index[obj.obj]) - } - } -} - -// exportName returns the 'exported' name of an object. It differs from -// obj.Name() only for type parameters (see tparamExportName for details). -func (p *iexporter) exportName(obj types.Object) (res string) { - if name := p.tparamNames[obj]; name != "" { - return name - } - return obj.Name() -} - -type iexporter struct { - fset *token.FileSet - out *bytes.Buffer - version int - - shallow bool // don't put types from other packages in the index - objEncoder *objectpath.Encoder // encodes objects from other packages in shallow mode; lazily allocated - localpkg *types.Package // (nil in bundle mode) - - // allPkgs tracks all packages that have been referenced by - // the export data, so we can ensure to include them in the - // main index. - allPkgs map[*types.Package]bool - - declTodo objQueue - - strings intWriter - stringIndex map[string]uint64 - - // In shallow mode, object positions are encoded as (file, offset). - // Each file is recorded as a line-number table. - // Only the lines of needed positions are saved faithfully. - fileInfo map[*token.File]uint64 // value is index in fileInfos - fileInfos []*filePositions - - data0 intWriter - declIndex map[types.Object]uint64 - tparamNames map[types.Object]string // typeparam->exported name - typIndex map[types.Type]uint64 - - indent int // for tracing support -} - -type filePositions struct { - file *token.File - needed []uint64 // unordered list of needed file offsets -} - -func (p *iexporter) trace(format string, args ...interface{}) { - if !trace { - // Call sites should also be guarded, but having this check here allows - // easily enabling/disabling debug trace statements. - return - } - fmt.Printf(strings.Repeat("..", p.indent)+format+"\n", args...) -} - -// objectpathEncoder returns the lazily allocated objectpath.Encoder to use -// when encoding objects in other packages during shallow export. -// -// Using a shared Encoder amortizes some of cost of objectpath search. -func (p *iexporter) objectpathEncoder() *objectpath.Encoder { - if p.objEncoder == nil { - p.objEncoder = new(objectpath.Encoder) - } - return p.objEncoder -} - -// stringOff returns the offset of s within the string section. -// If not already present, it's added to the end. -func (p *iexporter) stringOff(s string) uint64 { - off, ok := p.stringIndex[s] - if !ok { - off = uint64(p.strings.Len()) - p.stringIndex[s] = off - - p.strings.uint64(uint64(len(s))) - p.strings.WriteString(s) - } - return off -} - -// fileIndexAndOffset returns the index of the token.File and the byte offset of pos within it. -func (p *iexporter) fileIndexAndOffset(file *token.File, pos token.Pos) (uint64, uint64) { - index, ok := p.fileInfo[file] - if !ok { - index = uint64(len(p.fileInfo)) - p.fileInfos = append(p.fileInfos, &filePositions{file: file}) - if p.fileInfo == nil { - p.fileInfo = make(map[*token.File]uint64) - } - p.fileInfo[file] = index - } - // Record each needed offset. - info := p.fileInfos[index] - offset := uint64(file.Offset(pos)) - info.needed = append(info.needed, offset) - - return index, offset -} - -// pushDecl adds n to the declaration work queue, if not already present. -func (p *iexporter) pushDecl(obj types.Object) { - // Package unsafe is known to the compiler and predeclared. - // Caller should not ask us to do export it. - if obj.Pkg() == types.Unsafe { - panic("cannot export package unsafe") - } - - // Shallow export data: don't index decls from other packages. - if p.shallow && obj.Pkg() != p.localpkg { - return - } - - if _, ok := p.declIndex[obj]; ok { - return - } - - p.declIndex[obj] = ^uint64(0) // mark obj present in work queue - p.declTodo.pushTail(obj) -} - -// exportWriter handles writing out individual data section chunks. -type exportWriter struct { - p *iexporter - - data intWriter - prevFile string - prevLine int64 - prevColumn int64 -} - -func (w *exportWriter) exportPath(pkg *types.Package) string { - if pkg == w.p.localpkg { - return "" - } - return pkg.Path() -} - -func (p *iexporter) doDecl(obj types.Object) { - if trace { - p.trace("exporting decl %v (%T)", obj, obj) - p.indent++ - defer func() { - p.indent-- - p.trace("=> %s", obj) - }() - } - w := p.newWriter() - - switch obj := obj.(type) { - case *types.Var: - w.tag(varTag) - w.pos(obj.Pos()) - w.typ(obj.Type(), obj.Pkg()) - - case *types.Func: - sig, _ := obj.Type().(*types.Signature) - if sig.Recv() != nil { - // We shouldn't see methods in the package scope, - // but the type checker may repair "func () F() {}" - // to "func (Invalid) F()" and then treat it like "func F()", - // so allow that. See golang/go#57729. - if sig.Recv().Type() != types.Typ[types.Invalid] { - panic(internalErrorf("unexpected method: %v", sig)) - } - } - - // Function. - if sig.TypeParams().Len() == 0 { - w.tag(funcTag) - } else { - w.tag(genericFuncTag) - } - w.pos(obj.Pos()) - // The tparam list of the function type is the declaration of the type - // params. So, write out the type params right now. Then those type params - // will be referenced via their type offset (via typOff) in all other - // places in the signature and function where they are used. - // - // While importing the type parameters, tparamList computes and records - // their export name, so that it can be later used when writing the index. - if tparams := sig.TypeParams(); tparams.Len() > 0 { - w.tparamList(obj.Name(), tparams, obj.Pkg()) - } - w.signature(sig) - - case *types.Const: - w.tag(constTag) - w.pos(obj.Pos()) - w.value(obj.Type(), obj.Val()) - - case *types.TypeName: - t := obj.Type() - - if tparam, ok := aliases.Unalias(t).(*types.TypeParam); ok { - w.tag(typeParamTag) - w.pos(obj.Pos()) - constraint := tparam.Constraint() - if p.version >= iexportVersionGo1_18 { - implicit := false - if iface, _ := aliases.Unalias(constraint).(*types.Interface); iface != nil { - implicit = iface.IsImplicit() - } - w.bool(implicit) - } - w.typ(constraint, obj.Pkg()) - break - } - - if obj.IsAlias() { - w.tag(aliasTag) - w.pos(obj.Pos()) - if alias, ok := t.(*aliases.Alias); ok { - // Preserve materialized aliases, - // even of non-exported types. - t = aliases.Rhs(alias) - } - w.typ(t, obj.Pkg()) - break - } - - // Defined type. - named, ok := t.(*types.Named) - if !ok { - panic(internalErrorf("%s is not a defined type", t)) - } - - if named.TypeParams().Len() == 0 { - w.tag(typeTag) - } else { - w.tag(genericTypeTag) - } - w.pos(obj.Pos()) - - if named.TypeParams().Len() > 0 { - // While importing the type parameters, tparamList computes and records - // their export name, so that it can be later used when writing the index. - w.tparamList(obj.Name(), named.TypeParams(), obj.Pkg()) - } - - underlying := named.Underlying() - w.typ(underlying, obj.Pkg()) - - if types.IsInterface(t) { - break - } - - n := named.NumMethods() - w.uint64(uint64(n)) - for i := 0; i < n; i++ { - m := named.Method(i) - w.pos(m.Pos()) - w.string(m.Name()) - sig, _ := m.Type().(*types.Signature) - - // Receiver type parameters are type arguments of the receiver type, so - // their name must be qualified before exporting recv. - if rparams := sig.RecvTypeParams(); rparams.Len() > 0 { - prefix := obj.Name() + "." + m.Name() - for i := 0; i < rparams.Len(); i++ { - rparam := rparams.At(i) - name := tparamExportName(prefix, rparam) - w.p.tparamNames[rparam.Obj()] = name - } - } - w.param(sig.Recv()) - w.signature(sig) - } - - default: - panic(internalErrorf("unexpected object: %v", obj)) - } - - p.declIndex[obj] = w.flush() -} - -func (w *exportWriter) tag(tag byte) { - w.data.WriteByte(tag) -} - -func (w *exportWriter) pos(pos token.Pos) { - if w.p.shallow { - w.posV2(pos) - } else if w.p.version >= iexportVersionPosCol { - w.posV1(pos) - } else { - w.posV0(pos) - } -} - -// posV2 encoding (used only in shallow mode) records positions as -// (file, offset), where file is the index in the token.File table -// (which records the file name and newline offsets) and offset is a -// byte offset. It effectively ignores //line directives. -func (w *exportWriter) posV2(pos token.Pos) { - if pos == token.NoPos { - w.uint64(0) - return - } - file := w.p.fset.File(pos) // fset must be non-nil - index, offset := w.p.fileIndexAndOffset(file, pos) - w.uint64(1 + index) - w.uint64(offset) -} - -func (w *exportWriter) posV1(pos token.Pos) { - if w.p.fset == nil { - w.int64(0) - return - } - - p := w.p.fset.Position(pos) - file := p.Filename - line := int64(p.Line) - column := int64(p.Column) - - deltaColumn := (column - w.prevColumn) << 1 - deltaLine := (line - w.prevLine) << 1 - - if file != w.prevFile { - deltaLine |= 1 - } - if deltaLine != 0 { - deltaColumn |= 1 - } - - w.int64(deltaColumn) - if deltaColumn&1 != 0 { - w.int64(deltaLine) - if deltaLine&1 != 0 { - w.string(file) - } - } - - w.prevFile = file - w.prevLine = line - w.prevColumn = column -} - -func (w *exportWriter) posV0(pos token.Pos) { - if w.p.fset == nil { - w.int64(0) - return - } - - p := w.p.fset.Position(pos) - file := p.Filename - line := int64(p.Line) - - // When file is the same as the last position (common case), - // we can save a few bytes by delta encoding just the line - // number. - // - // Note: Because data objects may be read out of order (or not - // at all), we can only apply delta encoding within a single - // object. This is handled implicitly by tracking prevFile and - // prevLine as fields of exportWriter. - - if file == w.prevFile { - delta := line - w.prevLine - w.int64(delta) - if delta == deltaNewFile { - w.int64(-1) - } - } else { - w.int64(deltaNewFile) - w.int64(line) // line >= 0 - w.string(file) - w.prevFile = file - } - w.prevLine = line -} - -func (w *exportWriter) pkg(pkg *types.Package) { - // Ensure any referenced packages are declared in the main index. - w.p.allPkgs[pkg] = true - - w.string(w.exportPath(pkg)) -} - -func (w *exportWriter) qualifiedType(obj *types.TypeName) { - name := w.p.exportName(obj) - - // Ensure any referenced declarations are written out too. - w.p.pushDecl(obj) - w.string(name) - w.pkg(obj.Pkg()) -} - -// TODO(rfindley): what does 'pkg' even mean here? It would be better to pass -// it in explicitly into signatures and structs that may use it for -// constructing fields. -func (w *exportWriter) typ(t types.Type, pkg *types.Package) { - w.data.uint64(w.p.typOff(t, pkg)) -} - -func (p *iexporter) newWriter() *exportWriter { - return &exportWriter{p: p} -} - -func (w *exportWriter) flush() uint64 { - off := uint64(w.p.data0.Len()) - io.Copy(&w.p.data0, &w.data) - return off -} - -func (p *iexporter) typOff(t types.Type, pkg *types.Package) uint64 { - off, ok := p.typIndex[t] - if !ok { - w := p.newWriter() - w.doTyp(t, pkg) - off = predeclReserved + w.flush() - p.typIndex[t] = off - } - return off -} - -func (w *exportWriter) startType(k itag) { - w.data.uint64(uint64(k)) -} - -func (w *exportWriter) doTyp(t types.Type, pkg *types.Package) { - if trace { - w.p.trace("exporting type %s (%T)", t, t) - w.p.indent++ - defer func() { - w.p.indent-- - w.p.trace("=> %s", t) - }() - } - switch t := t.(type) { - case *aliases.Alias: - // TODO(adonovan): support parameterized aliases, following *types.Named. - w.startType(aliasType) - w.qualifiedType(t.Obj()) - - case *types.Named: - if targs := t.TypeArgs(); targs.Len() > 0 { - w.startType(instanceType) - // TODO(rfindley): investigate if this position is correct, and if it - // matters. - w.pos(t.Obj().Pos()) - w.typeList(targs, pkg) - w.typ(t.Origin(), pkg) - return - } - w.startType(definedType) - w.qualifiedType(t.Obj()) - - case *types.TypeParam: - w.startType(typeParamType) - w.qualifiedType(t.Obj()) - - case *types.Pointer: - w.startType(pointerType) - w.typ(t.Elem(), pkg) - - case *types.Slice: - w.startType(sliceType) - w.typ(t.Elem(), pkg) - - case *types.Array: - w.startType(arrayType) - w.uint64(uint64(t.Len())) - w.typ(t.Elem(), pkg) - - case *types.Chan: - w.startType(chanType) - // 1 RecvOnly; 2 SendOnly; 3 SendRecv - var dir uint64 - switch t.Dir() { - case types.RecvOnly: - dir = 1 - case types.SendOnly: - dir = 2 - case types.SendRecv: - dir = 3 - } - w.uint64(dir) - w.typ(t.Elem(), pkg) - - case *types.Map: - w.startType(mapType) - w.typ(t.Key(), pkg) - w.typ(t.Elem(), pkg) - - case *types.Signature: - w.startType(signatureType) - w.pkg(pkg) - w.signature(t) - - case *types.Struct: - w.startType(structType) - n := t.NumFields() - // Even for struct{} we must emit some qualifying package, because that's - // what the compiler does, and thus that's what the importer expects. - fieldPkg := pkg - if n > 0 { - fieldPkg = t.Field(0).Pkg() - } - if fieldPkg == nil { - // TODO(rfindley): improve this very hacky logic. - // - // The importer expects a package to be set for all struct types, even - // those with no fields. A better encoding might be to set NumFields - // before pkg. setPkg panics with a nil package, which may be possible - // to reach with invalid packages (and perhaps valid packages, too?), so - // (arbitrarily) set the localpkg if available. - // - // Alternatively, we may be able to simply guarantee that pkg != nil, by - // reconsidering the encoding of constant values. - if w.p.shallow { - fieldPkg = w.p.localpkg - } else { - panic(internalErrorf("no package to set for empty struct")) - } - } - w.pkg(fieldPkg) - w.uint64(uint64(n)) - - for i := 0; i < n; i++ { - f := t.Field(i) - if w.p.shallow { - w.objectPath(f) - } - w.pos(f.Pos()) - w.string(f.Name()) // unexported fields implicitly qualified by prior setPkg - w.typ(f.Type(), fieldPkg) - w.bool(f.Anonymous()) - w.string(t.Tag(i)) // note (or tag) - } - - case *types.Interface: - w.startType(interfaceType) - w.pkg(pkg) - - n := t.NumEmbeddeds() - w.uint64(uint64(n)) - for i := 0; i < n; i++ { - ft := t.EmbeddedType(i) - tPkg := pkg - if named, _ := aliases.Unalias(ft).(*types.Named); named != nil { - w.pos(named.Obj().Pos()) - } else { - w.pos(token.NoPos) - } - w.typ(ft, tPkg) - } - - // See comment for struct fields. In shallow mode we change the encoding - // for interface methods that are promoted from other packages. - - n = t.NumExplicitMethods() - w.uint64(uint64(n)) - for i := 0; i < n; i++ { - m := t.ExplicitMethod(i) - if w.p.shallow { - w.objectPath(m) - } - w.pos(m.Pos()) - w.string(m.Name()) - sig, _ := m.Type().(*types.Signature) - w.signature(sig) - } - - case *types.Union: - w.startType(unionType) - nt := t.Len() - w.uint64(uint64(nt)) - for i := 0; i < nt; i++ { - term := t.Term(i) - w.bool(term.Tilde()) - w.typ(term.Type(), pkg) - } - - default: - panic(internalErrorf("unexpected type: %v, %v", t, reflect.TypeOf(t))) - } -} - -// objectPath writes the package and objectPath to use to look up obj in a -// different package, when encoding in "shallow" mode. -// -// When doing a shallow import, the importer creates only the local package, -// and requests package symbols for dependencies from the client. -// However, certain types defined in the local package may hold objects defined -// (perhaps deeply) within another package. -// -// For example, consider the following: -// -// package a -// func F() chan * map[string] struct { X int } -// -// package b -// import "a" -// var B = a.F() -// -// In this example, the type of b.B holds fields defined in package a. -// In order to have the correct canonical objects for the field defined in the -// type of B, they are encoded as objectPaths and later looked up in the -// importer. The same problem applies to interface methods. -func (w *exportWriter) objectPath(obj types.Object) { - if obj.Pkg() == nil || obj.Pkg() == w.p.localpkg { - // obj.Pkg() may be nil for the builtin error.Error. - // In this case, or if obj is declared in the local package, no need to - // encode. - w.string("") - return - } - objectPath, err := w.p.objectpathEncoder().For(obj) - if err != nil { - // Fall back to the empty string, which will cause the importer to create a - // new object, which matches earlier behavior. Creating a new object is - // sufficient for many purposes (such as type checking), but causes certain - // references algorithms to fail (golang/go#60819). However, we didn't - // notice this problem during months of gopls@v0.12.0 testing. - // - // TODO(golang/go#61674): this workaround is insufficient, as in the case - // where the field forwarded from an instantiated type that may not appear - // in the export data of the original package: - // - // // package a - // type A[P any] struct{ F P } - // - // // package b - // type B a.A[int] - // - // We need to update references algorithms not to depend on this - // de-duplication, at which point we may want to simply remove the - // workaround here. - w.string("") - return - } - w.string(string(objectPath)) - w.pkg(obj.Pkg()) -} - -func (w *exportWriter) signature(sig *types.Signature) { - w.paramList(sig.Params()) - w.paramList(sig.Results()) - if sig.Params().Len() > 0 { - w.bool(sig.Variadic()) - } -} - -func (w *exportWriter) typeList(ts *types.TypeList, pkg *types.Package) { - w.uint64(uint64(ts.Len())) - for i := 0; i < ts.Len(); i++ { - w.typ(ts.At(i), pkg) - } -} - -func (w *exportWriter) tparamList(prefix string, list *types.TypeParamList, pkg *types.Package) { - ll := uint64(list.Len()) - w.uint64(ll) - for i := 0; i < list.Len(); i++ { - tparam := list.At(i) - // Set the type parameter exportName before exporting its type. - exportName := tparamExportName(prefix, tparam) - w.p.tparamNames[tparam.Obj()] = exportName - w.typ(list.At(i), pkg) - } -} - -const blankMarker = "$" - -// tparamExportName returns the 'exported' name of a type parameter, which -// differs from its actual object name: it is prefixed with a qualifier, and -// blank type parameter names are disambiguated by their index in the type -// parameter list. -func tparamExportName(prefix string, tparam *types.TypeParam) string { - assert(prefix != "") - name := tparam.Obj().Name() - if name == "_" { - name = blankMarker + strconv.Itoa(tparam.Index()) - } - return prefix + "." + name -} - -// tparamName returns the real name of a type parameter, after stripping its -// qualifying prefix and reverting blank-name encoding. See tparamExportName -// for details. -func tparamName(exportName string) string { - // Remove the "path" from the type param name that makes it unique. - ix := strings.LastIndex(exportName, ".") - if ix < 0 { - errorf("malformed type parameter export name %s: missing prefix", exportName) - } - name := exportName[ix+1:] - if strings.HasPrefix(name, blankMarker) { - return "_" - } - return name -} - -func (w *exportWriter) paramList(tup *types.Tuple) { - n := tup.Len() - w.uint64(uint64(n)) - for i := 0; i < n; i++ { - w.param(tup.At(i)) - } -} - -func (w *exportWriter) param(obj types.Object) { - w.pos(obj.Pos()) - w.localIdent(obj) - w.typ(obj.Type(), obj.Pkg()) -} - -func (w *exportWriter) value(typ types.Type, v constant.Value) { - w.typ(typ, nil) - if w.p.version >= iexportVersionGo1_18 { - w.int64(int64(v.Kind())) - } - - if v.Kind() == constant.Unknown { - // golang/go#60605: treat unknown constant values as if they have invalid type - // - // This loses some fidelity over the package type-checked from source, but that - // is acceptable. - // - // TODO(rfindley): we should switch on the recorded constant kind rather - // than the constant type - return - } - - switch b := typ.Underlying().(*types.Basic); b.Info() & types.IsConstType { - case types.IsBoolean: - w.bool(constant.BoolVal(v)) - case types.IsInteger: - var i big.Int - if i64, exact := constant.Int64Val(v); exact { - i.SetInt64(i64) - } else if ui64, exact := constant.Uint64Val(v); exact { - i.SetUint64(ui64) - } else { - i.SetString(v.ExactString(), 10) - } - w.mpint(&i, typ) - case types.IsFloat: - f := constantToFloat(v) - w.mpfloat(f, typ) - case types.IsComplex: - w.mpfloat(constantToFloat(constant.Real(v)), typ) - w.mpfloat(constantToFloat(constant.Imag(v)), typ) - case types.IsString: - w.string(constant.StringVal(v)) - default: - if b.Kind() == types.Invalid { - // package contains type errors - break - } - panic(internalErrorf("unexpected type %v (%v)", typ, typ.Underlying())) - } -} - -// constantToFloat converts a constant.Value with kind constant.Float to a -// big.Float. -func constantToFloat(x constant.Value) *big.Float { - x = constant.ToFloat(x) - // Use the same floating-point precision (512) as cmd/compile - // (see Mpprec in cmd/compile/internal/gc/mpfloat.go). - const mpprec = 512 - var f big.Float - f.SetPrec(mpprec) - if v, exact := constant.Float64Val(x); exact { - // float64 - f.SetFloat64(v) - } else if num, denom := constant.Num(x), constant.Denom(x); num.Kind() == constant.Int { - // TODO(gri): add big.Rat accessor to constant.Value. - n := valueToRat(num) - d := valueToRat(denom) - f.SetRat(n.Quo(n, d)) - } else { - // Value too large to represent as a fraction => inaccessible. - // TODO(gri): add big.Float accessor to constant.Value. - _, ok := f.SetString(x.ExactString()) - assert(ok) - } - return &f -} - -func valueToRat(x constant.Value) *big.Rat { - // Convert little-endian to big-endian. - // I can't believe this is necessary. - bytes := constant.Bytes(x) - for i := 0; i < len(bytes)/2; i++ { - bytes[i], bytes[len(bytes)-1-i] = bytes[len(bytes)-1-i], bytes[i] - } - return new(big.Rat).SetInt(new(big.Int).SetBytes(bytes)) -} - -// mpint exports a multi-precision integer. -// -// For unsigned types, small values are written out as a single -// byte. Larger values are written out as a length-prefixed big-endian -// byte string, where the length prefix is encoded as its complement. -// For example, bytes 0, 1, and 2 directly represent the integer -// values 0, 1, and 2; while bytes 255, 254, and 253 indicate a 1-, -// 2-, and 3-byte big-endian string follow. -// -// Encoding for signed types use the same general approach as for -// unsigned types, except small values use zig-zag encoding and the -// bottom bit of length prefix byte for large values is reserved as a -// sign bit. -// -// The exact boundary between small and large encodings varies -// according to the maximum number of bytes needed to encode a value -// of type typ. As a special case, 8-bit types are always encoded as a -// single byte. -// -// TODO(mdempsky): Is this level of complexity really worthwhile? -func (w *exportWriter) mpint(x *big.Int, typ types.Type) { - basic, ok := typ.Underlying().(*types.Basic) - if !ok { - panic(internalErrorf("unexpected type %v (%T)", typ.Underlying(), typ.Underlying())) - } - - signed, maxBytes := intSize(basic) - - negative := x.Sign() < 0 - if !signed && negative { - panic(internalErrorf("negative unsigned integer; type %v, value %v", typ, x)) - } - - b := x.Bytes() - if len(b) > 0 && b[0] == 0 { - panic(internalErrorf("leading zeros")) - } - if uint(len(b)) > maxBytes { - panic(internalErrorf("bad mpint length: %d > %d (type %v, value %v)", len(b), maxBytes, typ, x)) - } - - maxSmall := 256 - maxBytes - if signed { - maxSmall = 256 - 2*maxBytes - } - if maxBytes == 1 { - maxSmall = 256 - } - - // Check if x can use small value encoding. - if len(b) <= 1 { - var ux uint - if len(b) == 1 { - ux = uint(b[0]) - } - if signed { - ux <<= 1 - if negative { - ux-- - } - } - if ux < maxSmall { - w.data.WriteByte(byte(ux)) - return - } - } - - n := 256 - uint(len(b)) - if signed { - n = 256 - 2*uint(len(b)) - if negative { - n |= 1 - } - } - if n < maxSmall || n >= 256 { - panic(internalErrorf("encoding mistake: %d, %v, %v => %d", len(b), signed, negative, n)) - } - - w.data.WriteByte(byte(n)) - w.data.Write(b) -} - -// mpfloat exports a multi-precision floating point number. -// -// The number's value is decomposed into mantissa × 2**exponent, where -// mantissa is an integer. The value is written out as mantissa (as a -// multi-precision integer) and then the exponent, except exponent is -// omitted if mantissa is zero. -func (w *exportWriter) mpfloat(f *big.Float, typ types.Type) { - if f.IsInf() { - panic("infinite constant") - } - - // Break into f = mant × 2**exp, with 0.5 <= mant < 1. - var mant big.Float - exp := int64(f.MantExp(&mant)) - - // Scale so that mant is an integer. - prec := mant.MinPrec() - mant.SetMantExp(&mant, int(prec)) - exp -= int64(prec) - - manti, acc := mant.Int(nil) - if acc != big.Exact { - panic(internalErrorf("mantissa scaling failed for %f (%s)", f, acc)) - } - w.mpint(manti, typ) - if manti.Sign() != 0 { - w.int64(exp) - } -} - -func (w *exportWriter) bool(b bool) bool { - var x uint64 - if b { - x = 1 - } - w.uint64(x) - return b -} - -func (w *exportWriter) int64(x int64) { w.data.int64(x) } -func (w *exportWriter) uint64(x uint64) { w.data.uint64(x) } -func (w *exportWriter) string(s string) { w.uint64(w.p.stringOff(s)) } - -func (w *exportWriter) localIdent(obj types.Object) { - // Anonymous parameters. - if obj == nil { - w.string("") - return - } - - name := obj.Name() - if name == "_" { - w.string("_") - return - } - - w.string(name) -} - -type intWriter struct { - bytes.Buffer -} - -func (w *intWriter) int64(x int64) { - var buf [binary.MaxVarintLen64]byte - n := binary.PutVarint(buf[:], x) - w.Write(buf[:n]) -} - -func (w *intWriter) uint64(x uint64) { - var buf [binary.MaxVarintLen64]byte - n := binary.PutUvarint(buf[:], x) - w.Write(buf[:n]) -} - -func assert(cond bool) { - if !cond { - panic("internal error: assertion failed") - } -} - -// The below is copied from go/src/cmd/compile/internal/gc/syntax.go. - -// objQueue is a FIFO queue of types.Object. The zero value of objQueue is -// a ready-to-use empty queue. -type objQueue struct { - ring []types.Object - head, tail int -} - -// empty returns true if q contains no Nodes. -func (q *objQueue) empty() bool { - return q.head == q.tail -} - -// pushTail appends n to the tail of the queue. -func (q *objQueue) pushTail(obj types.Object) { - if len(q.ring) == 0 { - q.ring = make([]types.Object, 16) - } else if q.head+len(q.ring) == q.tail { - // Grow the ring. - nring := make([]types.Object, len(q.ring)*2) - // Copy the old elements. - part := q.ring[q.head%len(q.ring):] - if q.tail-q.head <= len(part) { - part = part[:q.tail-q.head] - copy(nring, part) - } else { - pos := copy(nring, part) - copy(nring[pos:], q.ring[:q.tail%len(q.ring)]) - } - q.ring, q.head, q.tail = nring, 0, q.tail-q.head - } - - q.ring[q.tail%len(q.ring)] = obj - q.tail++ -} - -// popHead pops a node from the head of the queue. It panics if q is empty. -func (q *objQueue) popHead() types.Object { - if q.empty() { - panic("dequeue empty") - } - obj := q.ring[q.head%len(q.ring)] - q.head++ - return obj -} - -// internalError represents an error generated inside this package. -type internalError string - -func (e internalError) Error() string { return "gcimporter: " + string(e) } - -// TODO(adonovan): make this call panic, so that it's symmetric with errorf. -// Otherwise it's easy to forget to do anything with the error. -// -// TODO(adonovan): also, consider switching the names "errorf" and -// "internalErrorf" as the former is used for bugs, whose cause is -// internal inconsistency, whereas the latter is used for ordinary -// situations like bad input, whose cause is external. -func internalErrorf(format string, args ...interface{}) error { - return internalError(fmt.Sprintf(format, args...)) -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/iimport.go b/vendor/golang.org/x/tools/internal/gcimporter/iimport.go deleted file mode 100644 index 136aa03..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/iimport.go +++ /dev/null @@ -1,1100 +0,0 @@ -// Copyright 2018 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. - -// Indexed package import. -// See cmd/compile/internal/gc/iexport.go for the export data format. - -// This file is a copy of $GOROOT/src/go/internal/gcimporter/iimport.go. - -package gcimporter - -import ( - "bytes" - "encoding/binary" - "fmt" - "go/constant" - "go/token" - "go/types" - "io" - "math/big" - "sort" - "strings" - - "golang.org/x/tools/go/types/objectpath" - "golang.org/x/tools/internal/aliases" - "golang.org/x/tools/internal/typesinternal" -) - -type intReader struct { - *bytes.Reader - path string -} - -func (r *intReader) int64() int64 { - i, err := binary.ReadVarint(r.Reader) - if err != nil { - errorf("import %q: read varint error: %v", r.path, err) - } - return i -} - -func (r *intReader) uint64() uint64 { - i, err := binary.ReadUvarint(r.Reader) - if err != nil { - errorf("import %q: read varint error: %v", r.path, err) - } - return i -} - -// Keep this in sync with constants in iexport.go. -const ( - iexportVersionGo1_11 = 0 - iexportVersionPosCol = 1 - iexportVersionGo1_18 = 2 - iexportVersionGenerics = 2 - - iexportVersionCurrent = 2 -) - -type ident struct { - pkg *types.Package - name string -} - -const predeclReserved = 32 - -type itag uint64 - -const ( - // Types - definedType itag = iota - pointerType - sliceType - arrayType - chanType - mapType - signatureType - structType - interfaceType - typeParamType - instanceType - unionType - aliasType -) - -// Object tags -const ( - varTag = 'V' - funcTag = 'F' - genericFuncTag = 'G' - constTag = 'C' - aliasTag = 'A' - genericAliasTag = 'B' - typeParamTag = 'P' - typeTag = 'T' - genericTypeTag = 'U' -) - -// IImportData imports a package from the serialized package data -// and returns 0 and a reference to the package. -// If the export data version is not recognized or the format is otherwise -// compromised, an error is returned. -func IImportData(fset *token.FileSet, imports map[string]*types.Package, data []byte, path string) (int, *types.Package, error) { - pkgs, err := iimportCommon(fset, GetPackagesFromMap(imports), data, false, path, false, nil) - if err != nil { - return 0, nil, err - } - return 0, pkgs[0], nil -} - -// IImportBundle imports a set of packages from the serialized package bundle. -func IImportBundle(fset *token.FileSet, imports map[string]*types.Package, data []byte) ([]*types.Package, error) { - return iimportCommon(fset, GetPackagesFromMap(imports), data, true, "", false, nil) -} - -// A GetPackagesFunc function obtains the non-nil symbols for a set of -// packages, creating and recursively importing them as needed. An -// implementation should store each package symbol is in the Pkg -// field of the items array. -// -// Any error causes importing to fail. This can be used to quickly read -// the import manifest of an export data file without fully decoding it. -type GetPackagesFunc = func(items []GetPackagesItem) error - -// A GetPackagesItem is a request from the importer for the package -// symbol of the specified name and path. -type GetPackagesItem struct { - Name, Path string - Pkg *types.Package // to be filled in by GetPackagesFunc call - - // private importer state - pathOffset uint64 - nameIndex map[string]uint64 -} - -// GetPackagesFromMap returns a GetPackagesFunc that retrieves -// packages from the given map of package path to package. -// -// The returned function may mutate m: each requested package that is not -// found is created with types.NewPackage and inserted into m. -func GetPackagesFromMap(m map[string]*types.Package) GetPackagesFunc { - return func(items []GetPackagesItem) error { - for i, item := range items { - pkg, ok := m[item.Path] - if !ok { - pkg = types.NewPackage(item.Path, item.Name) - m[item.Path] = pkg - } - items[i].Pkg = pkg - } - return nil - } -} - -func iimportCommon(fset *token.FileSet, getPackages GetPackagesFunc, data []byte, bundle bool, path string, shallow bool, reportf ReportFunc) (pkgs []*types.Package, err error) { - const currentVersion = iexportVersionCurrent - version := int64(-1) - if !debug { - defer func() { - if e := recover(); e != nil { - if bundle { - err = fmt.Errorf("%v", e) - } else if version > currentVersion { - err = fmt.Errorf("cannot import %q (%v), export data is newer version - update tool", path, e) - } else { - err = fmt.Errorf("internal error while importing %q (%v); please report an issue", path, e) - } - } - }() - } - - r := &intReader{bytes.NewReader(data), path} - - if bundle { - if v := r.uint64(); v != bundleVersion { - errorf("unknown bundle format version %d", v) - } - } - - version = int64(r.uint64()) - switch version { - case iexportVersionGo1_18, iexportVersionPosCol, iexportVersionGo1_11: - default: - if version > iexportVersionGo1_18 { - errorf("unstable iexport format version %d, just rebuild compiler and std library", version) - } else { - errorf("unknown iexport format version %d", version) - } - } - - sLen := int64(r.uint64()) - var fLen int64 - var fileOffset []uint64 - if shallow { - // Shallow mode uses a different position encoding. - fLen = int64(r.uint64()) - fileOffset = make([]uint64, r.uint64()) - for i := range fileOffset { - fileOffset[i] = r.uint64() - } - } - dLen := int64(r.uint64()) - - whence, _ := r.Seek(0, io.SeekCurrent) - stringData := data[whence : whence+sLen] - fileData := data[whence+sLen : whence+sLen+fLen] - declData := data[whence+sLen+fLen : whence+sLen+fLen+dLen] - r.Seek(sLen+fLen+dLen, io.SeekCurrent) - - p := iimporter{ - version: int(version), - ipath: path, - aliases: aliases.Enabled(), - shallow: shallow, - reportf: reportf, - - stringData: stringData, - stringCache: make(map[uint64]string), - fileOffset: fileOffset, - fileData: fileData, - fileCache: make([]*token.File, len(fileOffset)), - pkgCache: make(map[uint64]*types.Package), - - declData: declData, - pkgIndex: make(map[*types.Package]map[string]uint64), - typCache: make(map[uint64]types.Type), - // Separate map for typeparams, keyed by their package and unique - // name. - tparamIndex: make(map[ident]types.Type), - - fake: fakeFileSet{ - fset: fset, - files: make(map[string]*fileInfo), - }, - } - defer p.fake.setLines() // set lines for files in fset - - for i, pt := range predeclared() { - p.typCache[uint64(i)] = pt - } - - // Gather the relevant packages from the manifest. - items := make([]GetPackagesItem, r.uint64()) - uniquePkgPaths := make(map[string]bool) - for i := range items { - pkgPathOff := r.uint64() - pkgPath := p.stringAt(pkgPathOff) - pkgName := p.stringAt(r.uint64()) - _ = r.uint64() // package height; unused by go/types - - if pkgPath == "" { - pkgPath = path - } - items[i].Name = pkgName - items[i].Path = pkgPath - items[i].pathOffset = pkgPathOff - - // Read index for package. - nameIndex := make(map[string]uint64) - nSyms := r.uint64() - // In shallow mode, only the current package (i=0) has an index. - assert(!(shallow && i > 0 && nSyms != 0)) - for ; nSyms > 0; nSyms-- { - name := p.stringAt(r.uint64()) - nameIndex[name] = r.uint64() - } - - items[i].nameIndex = nameIndex - - uniquePkgPaths[pkgPath] = true - } - // Debugging #63822; hypothesis: there are duplicate PkgPaths. - if len(uniquePkgPaths) != len(items) { - reportf("found duplicate PkgPaths while reading export data manifest: %v", items) - } - - // Request packages all at once from the client, - // enabling a parallel implementation. - if err := getPackages(items); err != nil { - return nil, err // don't wrap this error - } - - // Check the results and complete the index. - pkgList := make([]*types.Package, len(items)) - for i, item := range items { - pkg := item.Pkg - if pkg == nil { - errorf("internal error: getPackages returned nil package for %q", item.Path) - } else if pkg.Path() != item.Path { - errorf("internal error: getPackages returned wrong path %q, want %q", pkg.Path(), item.Path) - } else if pkg.Name() != item.Name { - errorf("internal error: getPackages returned wrong name %s for package %q, want %s", pkg.Name(), item.Path, item.Name) - } - p.pkgCache[item.pathOffset] = pkg - p.pkgIndex[pkg] = item.nameIndex - pkgList[i] = pkg - } - - if bundle { - pkgs = make([]*types.Package, r.uint64()) - for i := range pkgs { - pkg := p.pkgAt(r.uint64()) - imps := make([]*types.Package, r.uint64()) - for j := range imps { - imps[j] = p.pkgAt(r.uint64()) - } - pkg.SetImports(imps) - pkgs[i] = pkg - } - } else { - if len(pkgList) == 0 { - errorf("no packages found for %s", path) - panic("unreachable") - } - pkgs = pkgList[:1] - - // record all referenced packages as imports - list := append(([]*types.Package)(nil), pkgList[1:]...) - sort.Sort(byPath(list)) - pkgs[0].SetImports(list) - } - - for _, pkg := range pkgs { - if pkg.Complete() { - continue - } - - names := make([]string, 0, len(p.pkgIndex[pkg])) - for name := range p.pkgIndex[pkg] { - names = append(names, name) - } - sort.Strings(names) - for _, name := range names { - p.doDecl(pkg, name) - } - - // package was imported completely and without errors - pkg.MarkComplete() - } - - // SetConstraint can't be called if the constraint type is not yet complete. - // When type params are created in the typeParamTag case of (*importReader).obj(), - // the associated constraint type may not be complete due to recursion. - // Therefore, we defer calling SetConstraint there, and call it here instead - // after all types are complete. - for _, d := range p.later { - d.t.SetConstraint(d.constraint) - } - - for _, typ := range p.interfaceList { - typ.Complete() - } - - // Workaround for golang/go#61561. See the doc for instanceList for details. - for _, typ := range p.instanceList { - if iface, _ := typ.Underlying().(*types.Interface); iface != nil { - iface.Complete() - } - } - - return pkgs, nil -} - -type setConstraintArgs struct { - t *types.TypeParam - constraint types.Type -} - -type iimporter struct { - version int - ipath string - - aliases bool - shallow bool - reportf ReportFunc // if non-nil, used to report bugs - - stringData []byte - stringCache map[uint64]string - fileOffset []uint64 // fileOffset[i] is offset in fileData for info about file encoded as i - fileData []byte - fileCache []*token.File // memoized decoding of file encoded as i - pkgCache map[uint64]*types.Package - - declData []byte - pkgIndex map[*types.Package]map[string]uint64 - typCache map[uint64]types.Type - tparamIndex map[ident]types.Type - - fake fakeFileSet - interfaceList []*types.Interface - - // Workaround for the go/types bug golang/go#61561: instances produced during - // instantiation may contain incomplete interfaces. Here we only complete the - // underlying type of the instance, which is the most common case but doesn't - // handle parameterized interface literals defined deeper in the type. - instanceList []types.Type // instances for later completion (see golang/go#61561) - - // Arguments for calls to SetConstraint that are deferred due to recursive types - later []setConstraintArgs - - indent int // for tracing support -} - -func (p *iimporter) trace(format string, args ...interface{}) { - if !trace { - // Call sites should also be guarded, but having this check here allows - // easily enabling/disabling debug trace statements. - return - } - fmt.Printf(strings.Repeat("..", p.indent)+format+"\n", args...) -} - -func (p *iimporter) doDecl(pkg *types.Package, name string) { - if debug { - p.trace("import decl %s", name) - p.indent++ - defer func() { - p.indent-- - p.trace("=> %s", name) - }() - } - // See if we've already imported this declaration. - if obj := pkg.Scope().Lookup(name); obj != nil { - return - } - - off, ok := p.pkgIndex[pkg][name] - if !ok { - // In deep mode, the index should be complete. In shallow - // mode, we should have already recursively loaded necessary - // dependencies so the above Lookup succeeds. - errorf("%v.%v not in index", pkg, name) - } - - r := &importReader{p: p, currPkg: pkg} - r.declReader.Reset(p.declData[off:]) - - r.obj(name) -} - -func (p *iimporter) stringAt(off uint64) string { - if s, ok := p.stringCache[off]; ok { - return s - } - - slen, n := binary.Uvarint(p.stringData[off:]) - if n <= 0 { - errorf("varint failed") - } - spos := off + uint64(n) - s := string(p.stringData[spos : spos+slen]) - p.stringCache[off] = s - return s -} - -func (p *iimporter) fileAt(index uint64) *token.File { - file := p.fileCache[index] - if file == nil { - off := p.fileOffset[index] - file = p.decodeFile(intReader{bytes.NewReader(p.fileData[off:]), p.ipath}) - p.fileCache[index] = file - } - return file -} - -func (p *iimporter) decodeFile(rd intReader) *token.File { - filename := p.stringAt(rd.uint64()) - size := int(rd.uint64()) - file := p.fake.fset.AddFile(filename, -1, size) - - // SetLines requires a nondecreasing sequence. - // Because it is common for clients to derive the interval - // [start, start+len(name)] from a start position, and we - // want to ensure that the end offset is on the same line, - // we fill in the gaps of the sparse encoding with values - // that strictly increase by the largest possible amount. - // This allows us to avoid having to record the actual end - // offset of each needed line. - - lines := make([]int, int(rd.uint64())) - var index, offset int - for i, n := 0, int(rd.uint64()); i < n; i++ { - index += int(rd.uint64()) - offset += int(rd.uint64()) - lines[index] = offset - - // Ensure monotonicity between points. - for j := index - 1; j > 0 && lines[j] == 0; j-- { - lines[j] = lines[j+1] - 1 - } - } - - // Ensure monotonicity after last point. - for j := len(lines) - 1; j > 0 && lines[j] == 0; j-- { - size-- - lines[j] = size - } - - if !file.SetLines(lines) { - errorf("SetLines failed: %d", lines) // can't happen - } - return file -} - -func (p *iimporter) pkgAt(off uint64) *types.Package { - if pkg, ok := p.pkgCache[off]; ok { - return pkg - } - path := p.stringAt(off) - errorf("missing package %q in %q", path, p.ipath) - return nil -} - -func (p *iimporter) typAt(off uint64, base *types.Named) types.Type { - if t, ok := p.typCache[off]; ok && canReuse(base, t) { - return t - } - - if off < predeclReserved { - errorf("predeclared type missing from cache: %v", off) - } - - r := &importReader{p: p} - r.declReader.Reset(p.declData[off-predeclReserved:]) - t := r.doType(base) - - if canReuse(base, t) { - p.typCache[off] = t - } - return t -} - -// canReuse reports whether the type rhs on the RHS of the declaration for def -// may be re-used. -// -// Specifically, if def is non-nil and rhs is an interface type with methods, it -// may not be re-used because we have a convention of setting the receiver type -// for interface methods to def. -func canReuse(def *types.Named, rhs types.Type) bool { - if def == nil { - return true - } - iface, _ := aliases.Unalias(rhs).(*types.Interface) - if iface == nil { - return true - } - // Don't use iface.Empty() here as iface may not be complete. - return iface.NumEmbeddeds() == 0 && iface.NumExplicitMethods() == 0 -} - -type importReader struct { - p *iimporter - declReader bytes.Reader - currPkg *types.Package - prevFile string - prevLine int64 - prevColumn int64 -} - -func (r *importReader) obj(name string) { - tag := r.byte() - pos := r.pos() - - switch tag { - case aliasTag: - typ := r.typ() - // TODO(adonovan): support generic aliases: - // if tag == genericAliasTag { - // tparams := r.tparamList() - // alias.SetTypeParams(tparams) - // } - r.declare(aliases.NewAlias(r.p.aliases, pos, r.currPkg, name, typ)) - - case constTag: - typ, val := r.value() - - r.declare(types.NewConst(pos, r.currPkg, name, typ, val)) - - case funcTag, genericFuncTag: - var tparams []*types.TypeParam - if tag == genericFuncTag { - tparams = r.tparamList() - } - sig := r.signature(nil, nil, tparams) - r.declare(types.NewFunc(pos, r.currPkg, name, sig)) - - case typeTag, genericTypeTag: - // Types can be recursive. We need to setup a stub - // declaration before recursing. - obj := types.NewTypeName(pos, r.currPkg, name, nil) - named := types.NewNamed(obj, nil, nil) - // Declare obj before calling r.tparamList, so the new type name is recognized - // if used in the constraint of one of its own typeparams (see #48280). - r.declare(obj) - if tag == genericTypeTag { - tparams := r.tparamList() - named.SetTypeParams(tparams) - } - - underlying := r.p.typAt(r.uint64(), named).Underlying() - named.SetUnderlying(underlying) - - if !isInterface(underlying) { - for n := r.uint64(); n > 0; n-- { - mpos := r.pos() - mname := r.ident() - recv := r.param() - - // If the receiver has any targs, set those as the - // rparams of the method (since those are the - // typeparams being used in the method sig/body). - _, recvNamed := typesinternal.ReceiverNamed(recv) - targs := recvNamed.TypeArgs() - var rparams []*types.TypeParam - if targs.Len() > 0 { - rparams = make([]*types.TypeParam, targs.Len()) - for i := range rparams { - rparams[i] = aliases.Unalias(targs.At(i)).(*types.TypeParam) - } - } - msig := r.signature(recv, rparams, nil) - - named.AddMethod(types.NewFunc(mpos, r.currPkg, mname, msig)) - } - } - - case typeParamTag: - // We need to "declare" a typeparam in order to have a name that - // can be referenced recursively (if needed) in the type param's - // bound. - if r.p.version < iexportVersionGenerics { - errorf("unexpected type param type") - } - name0 := tparamName(name) - tn := types.NewTypeName(pos, r.currPkg, name0, nil) - t := types.NewTypeParam(tn, nil) - - // To handle recursive references to the typeparam within its - // bound, save the partial type in tparamIndex before reading the bounds. - id := ident{r.currPkg, name} - r.p.tparamIndex[id] = t - var implicit bool - if r.p.version >= iexportVersionGo1_18 { - implicit = r.bool() - } - constraint := r.typ() - if implicit { - iface, _ := aliases.Unalias(constraint).(*types.Interface) - if iface == nil { - errorf("non-interface constraint marked implicit") - } - iface.MarkImplicit() - } - // The constraint type may not be complete, if we - // are in the middle of a type recursion involving type - // constraints. So, we defer SetConstraint until we have - // completely set up all types in ImportData. - r.p.later = append(r.p.later, setConstraintArgs{t: t, constraint: constraint}) - - case varTag: - typ := r.typ() - - r.declare(types.NewVar(pos, r.currPkg, name, typ)) - - default: - errorf("unexpected tag: %v", tag) - } -} - -func (r *importReader) declare(obj types.Object) { - obj.Pkg().Scope().Insert(obj) -} - -func (r *importReader) value() (typ types.Type, val constant.Value) { - typ = r.typ() - if r.p.version >= iexportVersionGo1_18 { - // TODO: add support for using the kind. - _ = constant.Kind(r.int64()) - } - - switch b := typ.Underlying().(*types.Basic); b.Info() & types.IsConstType { - case types.IsBoolean: - val = constant.MakeBool(r.bool()) - - case types.IsString: - val = constant.MakeString(r.string()) - - case types.IsInteger: - var x big.Int - r.mpint(&x, b) - val = constant.Make(&x) - - case types.IsFloat: - val = r.mpfloat(b) - - case types.IsComplex: - re := r.mpfloat(b) - im := r.mpfloat(b) - val = constant.BinaryOp(re, token.ADD, constant.MakeImag(im)) - - default: - if b.Kind() == types.Invalid { - val = constant.MakeUnknown() - return - } - errorf("unexpected type %v", typ) // panics - panic("unreachable") - } - - return -} - -func intSize(b *types.Basic) (signed bool, maxBytes uint) { - if (b.Info() & types.IsUntyped) != 0 { - return true, 64 - } - - switch b.Kind() { - case types.Float32, types.Complex64: - return true, 3 - case types.Float64, types.Complex128: - return true, 7 - } - - signed = (b.Info() & types.IsUnsigned) == 0 - switch b.Kind() { - case types.Int8, types.Uint8: - maxBytes = 1 - case types.Int16, types.Uint16: - maxBytes = 2 - case types.Int32, types.Uint32: - maxBytes = 4 - default: - maxBytes = 8 - } - - return -} - -func (r *importReader) mpint(x *big.Int, typ *types.Basic) { - signed, maxBytes := intSize(typ) - - maxSmall := 256 - maxBytes - if signed { - maxSmall = 256 - 2*maxBytes - } - if maxBytes == 1 { - maxSmall = 256 - } - - n, _ := r.declReader.ReadByte() - if uint(n) < maxSmall { - v := int64(n) - if signed { - v >>= 1 - if n&1 != 0 { - v = ^v - } - } - x.SetInt64(v) - return - } - - v := -n - if signed { - v = -(n &^ 1) >> 1 - } - if v < 1 || uint(v) > maxBytes { - errorf("weird decoding: %v, %v => %v", n, signed, v) - } - b := make([]byte, v) - io.ReadFull(&r.declReader, b) - x.SetBytes(b) - if signed && n&1 != 0 { - x.Neg(x) - } -} - -func (r *importReader) mpfloat(typ *types.Basic) constant.Value { - var mant big.Int - r.mpint(&mant, typ) - var f big.Float - f.SetInt(&mant) - if f.Sign() != 0 { - f.SetMantExp(&f, int(r.int64())) - } - return constant.Make(&f) -} - -func (r *importReader) ident() string { - return r.string() -} - -func (r *importReader) qualifiedIdent() (*types.Package, string) { - name := r.string() - pkg := r.pkg() - return pkg, name -} - -func (r *importReader) pos() token.Pos { - if r.p.shallow { - // precise offsets are encoded only in shallow mode - return r.posv2() - } - if r.p.version >= iexportVersionPosCol { - r.posv1() - } else { - r.posv0() - } - - if r.prevFile == "" && r.prevLine == 0 && r.prevColumn == 0 { - return token.NoPos - } - return r.p.fake.pos(r.prevFile, int(r.prevLine), int(r.prevColumn)) -} - -func (r *importReader) posv0() { - delta := r.int64() - if delta != deltaNewFile { - r.prevLine += delta - } else if l := r.int64(); l == -1 { - r.prevLine += deltaNewFile - } else { - r.prevFile = r.string() - r.prevLine = l - } -} - -func (r *importReader) posv1() { - delta := r.int64() - r.prevColumn += delta >> 1 - if delta&1 != 0 { - delta = r.int64() - r.prevLine += delta >> 1 - if delta&1 != 0 { - r.prevFile = r.string() - } - } -} - -func (r *importReader) posv2() token.Pos { - file := r.uint64() - if file == 0 { - return token.NoPos - } - tf := r.p.fileAt(file - 1) - return tf.Pos(int(r.uint64())) -} - -func (r *importReader) typ() types.Type { - return r.p.typAt(r.uint64(), nil) -} - -func isInterface(t types.Type) bool { - _, ok := aliases.Unalias(t).(*types.Interface) - return ok -} - -func (r *importReader) pkg() *types.Package { return r.p.pkgAt(r.uint64()) } -func (r *importReader) string() string { return r.p.stringAt(r.uint64()) } - -func (r *importReader) doType(base *types.Named) (res types.Type) { - k := r.kind() - if debug { - r.p.trace("importing type %d (base: %s)", k, base) - r.p.indent++ - defer func() { - r.p.indent-- - r.p.trace("=> %s", res) - }() - } - switch k { - default: - errorf("unexpected kind tag in %q: %v", r.p.ipath, k) - return nil - - case aliasType, definedType: - pkg, name := r.qualifiedIdent() - r.p.doDecl(pkg, name) - return pkg.Scope().Lookup(name).(*types.TypeName).Type() - case pointerType: - return types.NewPointer(r.typ()) - case sliceType: - return types.NewSlice(r.typ()) - case arrayType: - n := r.uint64() - return types.NewArray(r.typ(), int64(n)) - case chanType: - dir := chanDir(int(r.uint64())) - return types.NewChan(dir, r.typ()) - case mapType: - return types.NewMap(r.typ(), r.typ()) - case signatureType: - r.currPkg = r.pkg() - return r.signature(nil, nil, nil) - - case structType: - r.currPkg = r.pkg() - - fields := make([]*types.Var, r.uint64()) - tags := make([]string, len(fields)) - for i := range fields { - var field *types.Var - if r.p.shallow { - field, _ = r.objectPathObject().(*types.Var) - } - - fpos := r.pos() - fname := r.ident() - ftyp := r.typ() - emb := r.bool() - tag := r.string() - - // Either this is not a shallow import, the field is local, or the - // encoded objectPath failed to produce an object (a bug). - // - // Even in this last, buggy case, fall back on creating a new field. As - // discussed in iexport.go, this is not correct, but mostly works and is - // preferable to failing (for now at least). - if field == nil { - field = types.NewField(fpos, r.currPkg, fname, ftyp, emb) - } - - fields[i] = field - tags[i] = tag - } - return types.NewStruct(fields, tags) - - case interfaceType: - r.currPkg = r.pkg() - - embeddeds := make([]types.Type, r.uint64()) - for i := range embeddeds { - _ = r.pos() - embeddeds[i] = r.typ() - } - - methods := make([]*types.Func, r.uint64()) - for i := range methods { - var method *types.Func - if r.p.shallow { - method, _ = r.objectPathObject().(*types.Func) - } - - mpos := r.pos() - mname := r.ident() - - // TODO(mdempsky): Matches bimport.go, but I - // don't agree with this. - var recv *types.Var - if base != nil { - recv = types.NewVar(token.NoPos, r.currPkg, "", base) - } - msig := r.signature(recv, nil, nil) - - if method == nil { - method = types.NewFunc(mpos, r.currPkg, mname, msig) - } - methods[i] = method - } - - typ := newInterface(methods, embeddeds) - r.p.interfaceList = append(r.p.interfaceList, typ) - return typ - - case typeParamType: - if r.p.version < iexportVersionGenerics { - errorf("unexpected type param type") - } - pkg, name := r.qualifiedIdent() - id := ident{pkg, name} - if t, ok := r.p.tparamIndex[id]; ok { - // We're already in the process of importing this typeparam. - return t - } - // Otherwise, import the definition of the typeparam now. - r.p.doDecl(pkg, name) - return r.p.tparamIndex[id] - - case instanceType: - if r.p.version < iexportVersionGenerics { - errorf("unexpected instantiation type") - } - // pos does not matter for instances: they are positioned on the original - // type. - _ = r.pos() - len := r.uint64() - targs := make([]types.Type, len) - for i := range targs { - targs[i] = r.typ() - } - baseType := r.typ() - // The imported instantiated type doesn't include any methods, so - // we must always use the methods of the base (orig) type. - // TODO provide a non-nil *Environment - t, _ := types.Instantiate(nil, baseType, targs, false) - - // Workaround for golang/go#61561. See the doc for instanceList for details. - r.p.instanceList = append(r.p.instanceList, t) - return t - - case unionType: - if r.p.version < iexportVersionGenerics { - errorf("unexpected instantiation type") - } - terms := make([]*types.Term, r.uint64()) - for i := range terms { - terms[i] = types.NewTerm(r.bool(), r.typ()) - } - return types.NewUnion(terms) - } -} - -func (r *importReader) kind() itag { - return itag(r.uint64()) -} - -// objectPathObject is the inverse of exportWriter.objectPath. -// -// In shallow mode, certain fields and methods may need to be looked up in an -// imported package. See the doc for exportWriter.objectPath for a full -// explanation. -func (r *importReader) objectPathObject() types.Object { - objPath := objectpath.Path(r.string()) - if objPath == "" { - return nil - } - pkg := r.pkg() - obj, err := objectpath.Object(pkg, objPath) - if err != nil { - if r.p.reportf != nil { - r.p.reportf("failed to find object for objectPath %q: %v", objPath, err) - } - } - return obj -} - -func (r *importReader) signature(recv *types.Var, rparams []*types.TypeParam, tparams []*types.TypeParam) *types.Signature { - params := r.paramList() - results := r.paramList() - variadic := params.Len() > 0 && r.bool() - return types.NewSignatureType(recv, rparams, tparams, params, results, variadic) -} - -func (r *importReader) tparamList() []*types.TypeParam { - n := r.uint64() - if n == 0 { - return nil - } - xs := make([]*types.TypeParam, n) - for i := range xs { - // Note: the standard library importer is tolerant of nil types here, - // though would panic in SetTypeParams. - xs[i] = aliases.Unalias(r.typ()).(*types.TypeParam) - } - return xs -} - -func (r *importReader) paramList() *types.Tuple { - xs := make([]*types.Var, r.uint64()) - for i := range xs { - xs[i] = r.param() - } - return types.NewTuple(xs...) -} - -func (r *importReader) param() *types.Var { - pos := r.pos() - name := r.ident() - typ := r.typ() - return types.NewParam(pos, r.currPkg, name, typ) -} - -func (r *importReader) bool() bool { - return r.uint64() != 0 -} - -func (r *importReader) int64() int64 { - n, err := binary.ReadVarint(&r.declReader) - if err != nil { - errorf("readVarint: %v", err) - } - return n -} - -func (r *importReader) uint64() uint64 { - n, err := binary.ReadUvarint(&r.declReader) - if err != nil { - errorf("readUvarint: %v", err) - } - return n -} - -func (r *importReader) byte() byte { - x, err := r.declReader.ReadByte() - if err != nil { - errorf("declReader.ReadByte: %v", err) - } - return x -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/newInterface10.go b/vendor/golang.org/x/tools/internal/gcimporter/newInterface10.go deleted file mode 100644 index 8b163e3..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/newInterface10.go +++ /dev/null @@ -1,22 +0,0 @@ -// Copyright 2018 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. - -//go:build !go1.11 -// +build !go1.11 - -package gcimporter - -import "go/types" - -func newInterface(methods []*types.Func, embeddeds []types.Type) *types.Interface { - named := make([]*types.Named, len(embeddeds)) - for i, e := range embeddeds { - var ok bool - named[i], ok = e.(*types.Named) - if !ok { - panic("embedding of non-defined interfaces in interfaces is not supported before Go 1.11") - } - } - return types.NewInterface(methods, named) -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/newInterface11.go b/vendor/golang.org/x/tools/internal/gcimporter/newInterface11.go deleted file mode 100644 index 49984f4..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/newInterface11.go +++ /dev/null @@ -1,14 +0,0 @@ -// Copyright 2018 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. - -//go:build go1.11 -// +build go1.11 - -package gcimporter - -import "go/types" - -func newInterface(methods []*types.Func, embeddeds []types.Type) *types.Interface { - return types.NewInterfaceType(methods, embeddeds) -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/support_go118.go b/vendor/golang.org/x/tools/internal/gcimporter/support_go118.go deleted file mode 100644 index 0cd3b91..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/support_go118.go +++ /dev/null @@ -1,34 +0,0 @@ -// Copyright 2021 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 gcimporter - -import "go/types" - -const iexportVersion = iexportVersionGenerics - -// additionalPredeclared returns additional predeclared types in go.1.18. -func additionalPredeclared() []types.Type { - return []types.Type{ - // comparable - types.Universe.Lookup("comparable").Type(), - - // any - types.Universe.Lookup("any").Type(), - } -} - -// See cmd/compile/internal/types.SplitVargenSuffix. -func splitVargenSuffix(name string) (base, suffix string) { - i := len(name) - for i > 0 && name[i-1] >= '0' && name[i-1] <= '9' { - i-- - } - const dot = "·" - if i >= len(dot) && name[i-len(dot):i] == dot { - i -= len(dot) - return name[:i], name[i:] - } - return name, "" -} diff --git a/vendor/golang.org/x/tools/internal/gcimporter/unified_no.go b/vendor/golang.org/x/tools/internal/gcimporter/unified_no.go deleted file mode 100644 index 38b624c..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/unified_no.go +++ /dev/null @@ -1,10 +0,0 @@ -// Copyright 2022 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. - -//go:build !goexperiment.unified -// +build !goexperiment.unified - -package gcimporter - -const unifiedIR = false diff --git a/vendor/golang.org/x/tools/internal/gcimporter/unified_yes.go b/vendor/golang.org/x/tools/internal/gcimporter/unified_yes.go deleted file mode 100644 index b5118d0..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/unified_yes.go +++ /dev/null @@ -1,10 +0,0 @@ -// Copyright 2022 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. - -//go:build goexperiment.unified -// +build goexperiment.unified - -package gcimporter - -const unifiedIR = true diff --git a/vendor/golang.org/x/tools/internal/gcimporter/ureader_yes.go b/vendor/golang.org/x/tools/internal/gcimporter/ureader_yes.go deleted file mode 100644 index 2c07706..0000000 --- a/vendor/golang.org/x/tools/internal/gcimporter/ureader_yes.go +++ /dev/null @@ -1,728 +0,0 @@ -// Copyright 2021 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. - -// Derived from go/internal/gcimporter/ureader.go - -package gcimporter - -import ( - "fmt" - "go/token" - "go/types" - "sort" - "strings" - - "golang.org/x/tools/internal/aliases" - "golang.org/x/tools/internal/pkgbits" -) - -// A pkgReader holds the shared state for reading a unified IR package -// description. -type pkgReader struct { - pkgbits.PkgDecoder - - fake fakeFileSet - - ctxt *types.Context - imports map[string]*types.Package // previously imported packages, indexed by path - aliases bool // create types.Alias nodes - - // lazily initialized arrays corresponding to the unified IR - // PosBase, Pkg, and Type sections, respectively. - posBases []string // position bases (i.e., file names) - pkgs []*types.Package - typs []types.Type - - // laterFns holds functions that need to be invoked at the end of - // import reading. - laterFns []func() - // laterFors is used in case of 'type A B' to ensure that B is processed before A. - laterFors map[types.Type]int - - // ifaces holds a list of constructed Interfaces, which need to have - // Complete called after importing is done. - ifaces []*types.Interface -} - -// later adds a function to be invoked at the end of import reading. -func (pr *pkgReader) later(fn func()) { - pr.laterFns = append(pr.laterFns, fn) -} - -// See cmd/compile/internal/noder.derivedInfo. -type derivedInfo struct { - idx pkgbits.Index - needed bool -} - -// See cmd/compile/internal/noder.typeInfo. -type typeInfo struct { - idx pkgbits.Index - derived bool -} - -func UImportData(fset *token.FileSet, imports map[string]*types.Package, data []byte, path string) (_ int, pkg *types.Package, err error) { - if !debug { - defer func() { - if x := recover(); x != nil { - err = fmt.Errorf("internal error in importing %q (%v); please report an issue", path, x) - } - }() - } - - s := string(data) - s = s[:strings.LastIndex(s, "\n$$\n")] - input := pkgbits.NewPkgDecoder(path, s) - pkg = readUnifiedPackage(fset, nil, imports, input) - return -} - -// laterFor adds a function to be invoked at the end of import reading, and records the type that function is finishing. -func (pr *pkgReader) laterFor(t types.Type, fn func()) { - if pr.laterFors == nil { - pr.laterFors = make(map[types.Type]int) - } - pr.laterFors[t] = len(pr.laterFns) - pr.laterFns = append(pr.laterFns, fn) -} - -// readUnifiedPackage reads a package description from the given -// unified IR export data decoder. -func readUnifiedPackage(fset *token.FileSet, ctxt *types.Context, imports map[string]*types.Package, input pkgbits.PkgDecoder) *types.Package { - pr := pkgReader{ - PkgDecoder: input, - - fake: fakeFileSet{ - fset: fset, - files: make(map[string]*fileInfo), - }, - - ctxt: ctxt, - imports: imports, - aliases: aliases.Enabled(), - - posBases: make([]string, input.NumElems(pkgbits.RelocPosBase)), - pkgs: make([]*types.Package, input.NumElems(pkgbits.RelocPkg)), - typs: make([]types.Type, input.NumElems(pkgbits.RelocType)), - } - defer pr.fake.setLines() - - r := pr.newReader(pkgbits.RelocMeta, pkgbits.PublicRootIdx, pkgbits.SyncPublic) - pkg := r.pkg() - r.Bool() // has init - - for i, n := 0, r.Len(); i < n; i++ { - // As if r.obj(), but avoiding the Scope.Lookup call, - // to avoid eager loading of imports. - r.Sync(pkgbits.SyncObject) - assert(!r.Bool()) - r.p.objIdx(r.Reloc(pkgbits.RelocObj)) - assert(r.Len() == 0) - } - - r.Sync(pkgbits.SyncEOF) - - for _, fn := range pr.laterFns { - fn() - } - - for _, iface := range pr.ifaces { - iface.Complete() - } - - // Imports() of pkg are all of the transitive packages that were loaded. - var imps []*types.Package - for _, imp := range pr.pkgs { - if imp != nil && imp != pkg { - imps = append(imps, imp) - } - } - sort.Sort(byPath(imps)) - pkg.SetImports(imps) - - pkg.MarkComplete() - return pkg -} - -// A reader holds the state for reading a single unified IR element -// within a package. -type reader struct { - pkgbits.Decoder - - p *pkgReader - - dict *readerDict -} - -// A readerDict holds the state for type parameters that parameterize -// the current unified IR element. -type readerDict struct { - // bounds is a slice of typeInfos corresponding to the underlying - // bounds of the element's type parameters. - bounds []typeInfo - - // tparams is a slice of the constructed TypeParams for the element. - tparams []*types.TypeParam - - // devived is a slice of types derived from tparams, which may be - // instantiated while reading the current element. - derived []derivedInfo - derivedTypes []types.Type // lazily instantiated from derived -} - -func (pr *pkgReader) newReader(k pkgbits.RelocKind, idx pkgbits.Index, marker pkgbits.SyncMarker) *reader { - return &reader{ - Decoder: pr.NewDecoder(k, idx, marker), - p: pr, - } -} - -func (pr *pkgReader) tempReader(k pkgbits.RelocKind, idx pkgbits.Index, marker pkgbits.SyncMarker) *reader { - return &reader{ - Decoder: pr.TempDecoder(k, idx, marker), - p: pr, - } -} - -func (pr *pkgReader) retireReader(r *reader) { - pr.RetireDecoder(&r.Decoder) -} - -// @@@ Positions - -func (r *reader) pos() token.Pos { - r.Sync(pkgbits.SyncPos) - if !r.Bool() { - return token.NoPos - } - - // TODO(mdempsky): Delta encoding. - posBase := r.posBase() - line := r.Uint() - col := r.Uint() - return r.p.fake.pos(posBase, int(line), int(col)) -} - -func (r *reader) posBase() string { - return r.p.posBaseIdx(r.Reloc(pkgbits.RelocPosBase)) -} - -func (pr *pkgReader) posBaseIdx(idx pkgbits.Index) string { - if b := pr.posBases[idx]; b != "" { - return b - } - - var filename string - { - r := pr.tempReader(pkgbits.RelocPosBase, idx, pkgbits.SyncPosBase) - - // Within types2, position bases have a lot more details (e.g., - // keeping track of where //line directives appeared exactly). - // - // For go/types, we just track the file name. - - filename = r.String() - - if r.Bool() { // file base - // Was: "b = token.NewTrimmedFileBase(filename, true)" - } else { // line base - pos := r.pos() - line := r.Uint() - col := r.Uint() - - // Was: "b = token.NewLineBase(pos, filename, true, line, col)" - _, _, _ = pos, line, col - } - pr.retireReader(r) - } - b := filename - pr.posBases[idx] = b - return b -} - -// @@@ Packages - -func (r *reader) pkg() *types.Package { - r.Sync(pkgbits.SyncPkg) - return r.p.pkgIdx(r.Reloc(pkgbits.RelocPkg)) -} - -func (pr *pkgReader) pkgIdx(idx pkgbits.Index) *types.Package { - // TODO(mdempsky): Consider using some non-nil pointer to indicate - // the universe scope, so we don't need to keep re-reading it. - if pkg := pr.pkgs[idx]; pkg != nil { - return pkg - } - - pkg := pr.newReader(pkgbits.RelocPkg, idx, pkgbits.SyncPkgDef).doPkg() - pr.pkgs[idx] = pkg - return pkg -} - -func (r *reader) doPkg() *types.Package { - path := r.String() - switch path { - case "": - path = r.p.PkgPath() - case "builtin": - return nil // universe - case "unsafe": - return types.Unsafe - } - - if pkg := r.p.imports[path]; pkg != nil { - return pkg - } - - name := r.String() - - pkg := types.NewPackage(path, name) - r.p.imports[path] = pkg - - return pkg -} - -// @@@ Types - -func (r *reader) typ() types.Type { - return r.p.typIdx(r.typInfo(), r.dict) -} - -func (r *reader) typInfo() typeInfo { - r.Sync(pkgbits.SyncType) - if r.Bool() { - return typeInfo{idx: pkgbits.Index(r.Len()), derived: true} - } - return typeInfo{idx: r.Reloc(pkgbits.RelocType), derived: false} -} - -func (pr *pkgReader) typIdx(info typeInfo, dict *readerDict) types.Type { - idx := info.idx - var where *types.Type - if info.derived { - where = &dict.derivedTypes[idx] - idx = dict.derived[idx].idx - } else { - where = &pr.typs[idx] - } - - if typ := *where; typ != nil { - return typ - } - - var typ types.Type - { - r := pr.tempReader(pkgbits.RelocType, idx, pkgbits.SyncTypeIdx) - r.dict = dict - - typ = r.doTyp() - assert(typ != nil) - pr.retireReader(r) - } - // See comment in pkgReader.typIdx explaining how this happens. - if prev := *where; prev != nil { - return prev - } - - *where = typ - return typ -} - -func (r *reader) doTyp() (res types.Type) { - switch tag := pkgbits.CodeType(r.Code(pkgbits.SyncType)); tag { - default: - errorf("unhandled type tag: %v", tag) - panic("unreachable") - - case pkgbits.TypeBasic: - return types.Typ[r.Len()] - - case pkgbits.TypeNamed: - obj, targs := r.obj() - name := obj.(*types.TypeName) - if len(targs) != 0 { - t, _ := types.Instantiate(r.p.ctxt, name.Type(), targs, false) - return t - } - return name.Type() - - case pkgbits.TypeTypeParam: - return r.dict.tparams[r.Len()] - - case pkgbits.TypeArray: - len := int64(r.Uint64()) - return types.NewArray(r.typ(), len) - case pkgbits.TypeChan: - dir := types.ChanDir(r.Len()) - return types.NewChan(dir, r.typ()) - case pkgbits.TypeMap: - return types.NewMap(r.typ(), r.typ()) - case pkgbits.TypePointer: - return types.NewPointer(r.typ()) - case pkgbits.TypeSignature: - return r.signature(nil, nil, nil) - case pkgbits.TypeSlice: - return types.NewSlice(r.typ()) - case pkgbits.TypeStruct: - return r.structType() - case pkgbits.TypeInterface: - return r.interfaceType() - case pkgbits.TypeUnion: - return r.unionType() - } -} - -func (r *reader) structType() *types.Struct { - fields := make([]*types.Var, r.Len()) - var tags []string - for i := range fields { - pos := r.pos() - pkg, name := r.selector() - ftyp := r.typ() - tag := r.String() - embedded := r.Bool() - - fields[i] = types.NewField(pos, pkg, name, ftyp, embedded) - if tag != "" { - for len(tags) < i { - tags = append(tags, "") - } - tags = append(tags, tag) - } - } - return types.NewStruct(fields, tags) -} - -func (r *reader) unionType() *types.Union { - terms := make([]*types.Term, r.Len()) - for i := range terms { - terms[i] = types.NewTerm(r.Bool(), r.typ()) - } - return types.NewUnion(terms) -} - -func (r *reader) interfaceType() *types.Interface { - methods := make([]*types.Func, r.Len()) - embeddeds := make([]types.Type, r.Len()) - implicit := len(methods) == 0 && len(embeddeds) == 1 && r.Bool() - - for i := range methods { - pos := r.pos() - pkg, name := r.selector() - mtyp := r.signature(nil, nil, nil) - methods[i] = types.NewFunc(pos, pkg, name, mtyp) - } - - for i := range embeddeds { - embeddeds[i] = r.typ() - } - - iface := types.NewInterfaceType(methods, embeddeds) - if implicit { - iface.MarkImplicit() - } - - // We need to call iface.Complete(), but if there are any embedded - // defined types, then we may not have set their underlying - // interface type yet. So we need to defer calling Complete until - // after we've called SetUnderlying everywhere. - // - // TODO(mdempsky): After CL 424876 lands, it should be safe to call - // iface.Complete() immediately. - r.p.ifaces = append(r.p.ifaces, iface) - - return iface -} - -func (r *reader) signature(recv *types.Var, rtparams, tparams []*types.TypeParam) *types.Signature { - r.Sync(pkgbits.SyncSignature) - - params := r.params() - results := r.params() - variadic := r.Bool() - - return types.NewSignatureType(recv, rtparams, tparams, params, results, variadic) -} - -func (r *reader) params() *types.Tuple { - r.Sync(pkgbits.SyncParams) - - params := make([]*types.Var, r.Len()) - for i := range params { - params[i] = r.param() - } - - return types.NewTuple(params...) -} - -func (r *reader) param() *types.Var { - r.Sync(pkgbits.SyncParam) - - pos := r.pos() - pkg, name := r.localIdent() - typ := r.typ() - - return types.NewParam(pos, pkg, name, typ) -} - -// @@@ Objects - -func (r *reader) obj() (types.Object, []types.Type) { - r.Sync(pkgbits.SyncObject) - - assert(!r.Bool()) - - pkg, name := r.p.objIdx(r.Reloc(pkgbits.RelocObj)) - obj := pkgScope(pkg).Lookup(name) - - targs := make([]types.Type, r.Len()) - for i := range targs { - targs[i] = r.typ() - } - - return obj, targs -} - -func (pr *pkgReader) objIdx(idx pkgbits.Index) (*types.Package, string) { - - var objPkg *types.Package - var objName string - var tag pkgbits.CodeObj - { - rname := pr.tempReader(pkgbits.RelocName, idx, pkgbits.SyncObject1) - - objPkg, objName = rname.qualifiedIdent() - assert(objName != "") - - tag = pkgbits.CodeObj(rname.Code(pkgbits.SyncCodeObj)) - pr.retireReader(rname) - } - - if tag == pkgbits.ObjStub { - assert(objPkg == nil || objPkg == types.Unsafe) - return objPkg, objName - } - - // Ignore local types promoted to global scope (#55110). - if _, suffix := splitVargenSuffix(objName); suffix != "" { - return objPkg, objName - } - - if objPkg.Scope().Lookup(objName) == nil { - dict := pr.objDictIdx(idx) - - r := pr.newReader(pkgbits.RelocObj, idx, pkgbits.SyncObject1) - r.dict = dict - - declare := func(obj types.Object) { - objPkg.Scope().Insert(obj) - } - - switch tag { - default: - panic("weird") - - case pkgbits.ObjAlias: - pos := r.pos() - typ := r.typ() - declare(aliases.NewAlias(r.p.aliases, pos, objPkg, objName, typ)) - - case pkgbits.ObjConst: - pos := r.pos() - typ := r.typ() - val := r.Value() - declare(types.NewConst(pos, objPkg, objName, typ, val)) - - case pkgbits.ObjFunc: - pos := r.pos() - tparams := r.typeParamNames() - sig := r.signature(nil, nil, tparams) - declare(types.NewFunc(pos, objPkg, objName, sig)) - - case pkgbits.ObjType: - pos := r.pos() - - obj := types.NewTypeName(pos, objPkg, objName, nil) - named := types.NewNamed(obj, nil, nil) - declare(obj) - - named.SetTypeParams(r.typeParamNames()) - - setUnderlying := func(underlying types.Type) { - // If the underlying type is an interface, we need to - // duplicate its methods so we can replace the receiver - // parameter's type (#49906). - if iface, ok := aliases.Unalias(underlying).(*types.Interface); ok && iface.NumExplicitMethods() != 0 { - methods := make([]*types.Func, iface.NumExplicitMethods()) - for i := range methods { - fn := iface.ExplicitMethod(i) - sig := fn.Type().(*types.Signature) - - recv := types.NewVar(fn.Pos(), fn.Pkg(), "", named) - methods[i] = types.NewFunc(fn.Pos(), fn.Pkg(), fn.Name(), types.NewSignature(recv, sig.Params(), sig.Results(), sig.Variadic())) - } - - embeds := make([]types.Type, iface.NumEmbeddeds()) - for i := range embeds { - embeds[i] = iface.EmbeddedType(i) - } - - newIface := types.NewInterfaceType(methods, embeds) - r.p.ifaces = append(r.p.ifaces, newIface) - underlying = newIface - } - - named.SetUnderlying(underlying) - } - - // Since go.dev/cl/455279, we can assume rhs.Underlying() will - // always be non-nil. However, to temporarily support users of - // older snapshot releases, we continue to fallback to the old - // behavior for now. - // - // TODO(mdempsky): Remove fallback code and simplify after - // allowing time for snapshot users to upgrade. - rhs := r.typ() - if underlying := rhs.Underlying(); underlying != nil { - setUnderlying(underlying) - } else { - pk := r.p - pk.laterFor(named, func() { - // First be sure that the rhs is initialized, if it needs to be initialized. - delete(pk.laterFors, named) // prevent cycles - if i, ok := pk.laterFors[rhs]; ok { - f := pk.laterFns[i] - pk.laterFns[i] = func() {} // function is running now, so replace it with a no-op - f() // initialize RHS - } - setUnderlying(rhs.Underlying()) - }) - } - - for i, n := 0, r.Len(); i < n; i++ { - named.AddMethod(r.method()) - } - - case pkgbits.ObjVar: - pos := r.pos() - typ := r.typ() - declare(types.NewVar(pos, objPkg, objName, typ)) - } - } - - return objPkg, objName -} - -func (pr *pkgReader) objDictIdx(idx pkgbits.Index) *readerDict { - - var dict readerDict - - { - r := pr.tempReader(pkgbits.RelocObjDict, idx, pkgbits.SyncObject1) - if implicits := r.Len(); implicits != 0 { - errorf("unexpected object with %v implicit type parameter(s)", implicits) - } - - dict.bounds = make([]typeInfo, r.Len()) - for i := range dict.bounds { - dict.bounds[i] = r.typInfo() - } - - dict.derived = make([]derivedInfo, r.Len()) - dict.derivedTypes = make([]types.Type, len(dict.derived)) - for i := range dict.derived { - dict.derived[i] = derivedInfo{r.Reloc(pkgbits.RelocType), r.Bool()} - } - - pr.retireReader(r) - } - // function references follow, but reader doesn't need those - - return &dict -} - -func (r *reader) typeParamNames() []*types.TypeParam { - r.Sync(pkgbits.SyncTypeParamNames) - - // Note: This code assumes it only processes objects without - // implement type parameters. This is currently fine, because - // reader is only used to read in exported declarations, which are - // always package scoped. - - if len(r.dict.bounds) == 0 { - return nil - } - - // Careful: Type parameter lists may have cycles. To allow for this, - // we construct the type parameter list in two passes: first we - // create all the TypeNames and TypeParams, then we construct and - // set the bound type. - - r.dict.tparams = make([]*types.TypeParam, len(r.dict.bounds)) - for i := range r.dict.bounds { - pos := r.pos() - pkg, name := r.localIdent() - - tname := types.NewTypeName(pos, pkg, name, nil) - r.dict.tparams[i] = types.NewTypeParam(tname, nil) - } - - typs := make([]types.Type, len(r.dict.bounds)) - for i, bound := range r.dict.bounds { - typs[i] = r.p.typIdx(bound, r.dict) - } - - // TODO(mdempsky): This is subtle, elaborate further. - // - // We have to save tparams outside of the closure, because - // typeParamNames() can be called multiple times with the same - // dictionary instance. - // - // Also, this needs to happen later to make sure SetUnderlying has - // been called. - // - // TODO(mdempsky): Is it safe to have a single "later" slice or do - // we need to have multiple passes? See comments on CL 386002 and - // go.dev/issue/52104. - tparams := r.dict.tparams - r.p.later(func() { - for i, typ := range typs { - tparams[i].SetConstraint(typ) - } - }) - - return r.dict.tparams -} - -func (r *reader) method() *types.Func { - r.Sync(pkgbits.SyncMethod) - pos := r.pos() - pkg, name := r.selector() - - rparams := r.typeParamNames() - sig := r.signature(r.param(), rparams, nil) - - _ = r.pos() // TODO(mdempsky): Remove; this is a hacker for linker.go. - return types.NewFunc(pos, pkg, name, sig) -} - -func (r *reader) qualifiedIdent() (*types.Package, string) { return r.ident(pkgbits.SyncSym) } -func (r *reader) localIdent() (*types.Package, string) { return r.ident(pkgbits.SyncLocalIdent) } -func (r *reader) selector() (*types.Package, string) { return r.ident(pkgbits.SyncSelector) } - -func (r *reader) ident(marker pkgbits.SyncMarker) (*types.Package, string) { - r.Sync(marker) - return r.pkg(), r.String() -} - -// pkgScope returns pkg.Scope(). -// If pkg is nil, it returns types.Universe instead. -// -// TODO(mdempsky): Remove after x/tools can depend on Go 1.19. -func pkgScope(pkg *types.Package) *types.Scope { - if pkg != nil { - return pkg.Scope() - } - return types.Universe -} |