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-rw-r--r--vendor/golang.org/x/tools/go/internal/gcimporter/bimport.go1036
1 files changed, 0 insertions, 1036 deletions
diff --git a/vendor/golang.org/x/tools/go/internal/gcimporter/bimport.go b/vendor/golang.org/x/tools/go/internal/gcimporter/bimport.go
deleted file mode 100644
index e3c31078..00000000
--- a/vendor/golang.org/x/tools/go/internal/gcimporter/bimport.go
+++ /dev/null
@@ -1,1036 +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 is a copy of $GOROOT/src/go/internal/gcimporter/bimport.go.
-
-package gcimporter
-
-import (
- "encoding/binary"
- "fmt"
- "go/constant"
- "go/token"
- "go/types"
- "sort"
- "strconv"
- "strings"
- "sync"
- "unicode"
- "unicode/utf8"
-)
-
-type importer struct {
- imports map[string]*types.Package
- data []byte
- importpath string
- buf []byte // for reading strings
- version int // export format version
-
- // object lists
- strList []string // in order of appearance
- pathList []string // in order of appearance
- pkgList []*types.Package // in order of appearance
- typList []types.Type // in order of appearance
- interfaceList []*types.Interface // for delayed completion only
- trackAllTypes bool
-
- // position encoding
- posInfoFormat bool
- prevFile string
- prevLine int
- fake fakeFileSet
-
- // debugging support
- debugFormat bool
- read int // bytes read
-}
-
-// BImportData imports a package from the serialized package data
-// and returns the number of bytes consumed 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 BImportData(fset *token.FileSet, imports map[string]*types.Package, data []byte, path string) (_ int, pkg *types.Package, err error) {
- // catch panics and return them as errors
- const currentVersion = 6
- version := -1 // unknown version
- defer func() {
- if e := recover(); e != nil {
- // Return a (possibly nil or incomplete) package unchanged (see #16088).
- if version > currentVersion {
- err = fmt.Errorf("cannot import %q (%v), export data is newer version - update tool", path, e)
- } else {
- err = fmt.Errorf("cannot import %q (%v), possibly version skew - reinstall package", path, e)
- }
- }
- }()
-
- p := importer{
- imports: imports,
- data: data,
- importpath: path,
- version: version,
- strList: []string{""}, // empty string is mapped to 0
- pathList: []string{""}, // empty string is mapped to 0
- fake: fakeFileSet{
- fset: fset,
- files: make(map[string]*token.File),
- },
- }
-
- // read version info
- var versionstr string
- if b := p.rawByte(); b == 'c' || b == 'd' {
- // Go1.7 encoding; first byte encodes low-level
- // encoding format (compact vs debug).
- // For backward-compatibility only (avoid problems with
- // old installed packages). Newly compiled packages use
- // the extensible format string.
- // TODO(gri) Remove this support eventually; after Go1.8.
- if b == 'd' {
- p.debugFormat = true
- }
- p.trackAllTypes = p.rawByte() == 'a'
- p.posInfoFormat = p.int() != 0
- versionstr = p.string()
- if versionstr == "v1" {
- version = 0
- }
- } else {
- // Go1.8 extensible encoding
- // read version string and extract version number (ignore anything after the version number)
- versionstr = p.rawStringln(b)
- if s := strings.SplitN(versionstr, " ", 3); len(s) >= 2 && s[0] == "version" {
- if v, err := strconv.Atoi(s[1]); err == nil && v > 0 {
- version = v
- }
- }
- }
- p.version = version
-
- // read version specific flags - extend as necessary
- switch p.version {
- // case currentVersion:
- // ...
- // fallthrough
- case currentVersion, 5, 4, 3, 2, 1:
- p.debugFormat = p.rawStringln(p.rawByte()) == "debug"
- p.trackAllTypes = p.int() != 0
- p.posInfoFormat = p.int() != 0
- case 0:
- // Go1.7 encoding format - nothing to do here
- default:
- errorf("unknown bexport format version %d (%q)", p.version, versionstr)
- }
-
- // --- generic export data ---
-
- // populate typList with predeclared "known" types
- p.typList = append(p.typList, predeclared()...)
-
- // read package data
- pkg = p.pkg()
-
- // read objects of phase 1 only (see cmd/compile/internal/gc/bexport.go)
- objcount := 0
- for {
- tag := p.tagOrIndex()
- if tag == endTag {
- break
- }
- p.obj(tag)
- objcount++
- }
-
- // self-verification
- if count := p.int(); count != objcount {
- errorf("got %d objects; want %d", objcount, count)
- }
-
- // ignore compiler-specific import data
-
- // complete interfaces
- // TODO(gri) re-investigate if we still need to do this in a delayed fashion
- for _, typ := range p.interfaceList {
- typ.Complete()
- }
-
- // record all referenced packages as imports
- list := append(([]*types.Package)(nil), p.pkgList[1:]...)
- sort.Sort(byPath(list))
- pkg.SetImports(list)
-
- // package was imported completely and without errors
- pkg.MarkComplete()
-
- return p.read, pkg, nil
-}
-
-func errorf(format string, args ...interface{}) {
- panic(fmt.Sprintf(format, args...))
-}
-
-func (p *importer) pkg() *types.Package {
- // if the package was seen before, i is its index (>= 0)
- i := p.tagOrIndex()
- if i >= 0 {
- return p.pkgList[i]
- }
-
- // otherwise, i is the package tag (< 0)
- if i != packageTag {
- errorf("unexpected package tag %d version %d", i, p.version)
- }
-
- // read package data
- name := p.string()
- var path string
- if p.version >= 5 {
- path = p.path()
- } else {
- path = p.string()
- }
- if p.version >= 6 {
- p.int() // package height; unused by go/types
- }
-
- // we should never see an empty package name
- if name == "" {
- errorf("empty package name in import")
- }
-
- // an empty path denotes the package we are currently importing;
- // it must be the first package we see
- if (path == "") != (len(p.pkgList) == 0) {
- errorf("package path %q for pkg index %d", path, len(p.pkgList))
- }
-
- // if the package was imported before, use that one; otherwise create a new one
- if path == "" {
- path = p.importpath
- }
- pkg := p.imports[path]
- if pkg == nil {
- pkg = types.NewPackage(path, name)
- p.imports[path] = pkg
- } else if pkg.Name() != name {
- errorf("conflicting names %s and %s for package %q", pkg.Name(), name, path)
- }
- p.pkgList = append(p.pkgList, pkg)
-
- return pkg
-}
-
-// objTag returns the tag value for each object kind.
-func objTag(obj types.Object) int {
- switch obj.(type) {
- case *types.Const:
- return constTag
- case *types.TypeName:
- return typeTag
- case *types.Var:
- return varTag
- case *types.Func:
- return funcTag
- default:
- errorf("unexpected object: %v (%T)", obj, obj) // panics
- panic("unreachable")
- }
-}
-
-func sameObj(a, b types.Object) bool {
- // Because unnamed types are not canonicalized, we cannot simply compare types for
- // (pointer) identity.
- // Ideally we'd check equality of constant values as well, but this is good enough.
- return objTag(a) == objTag(b) && types.Identical(a.Type(), b.Type())
-}
-
-func (p *importer) declare(obj types.Object) {
- pkg := obj.Pkg()
- if alt := pkg.Scope().Insert(obj); alt != nil {
- // This can only trigger if we import a (non-type) object a second time.
- // Excluding type aliases, this cannot happen because 1) we only import a package
- // once; and b) we ignore compiler-specific export data which may contain
- // functions whose inlined function bodies refer to other functions that
- // were already imported.
- // However, type aliases require reexporting the original type, so we need
- // to allow it (see also the comment in cmd/compile/internal/gc/bimport.go,
- // method importer.obj, switch case importing functions).
- // TODO(gri) review/update this comment once the gc compiler handles type aliases.
- if !sameObj(obj, alt) {
- errorf("inconsistent import:\n\t%v\npreviously imported as:\n\t%v\n", obj, alt)
- }
- }
-}
-
-func (p *importer) obj(tag int) {
- switch tag {
- case constTag:
- pos := p.pos()
- pkg, name := p.qualifiedName()
- typ := p.typ(nil, nil)
- val := p.value()
- p.declare(types.NewConst(pos, pkg, name, typ, val))
-
- case aliasTag:
- // TODO(gri) verify type alias hookup is correct
- pos := p.pos()
- pkg, name := p.qualifiedName()
- typ := p.typ(nil, nil)
- p.declare(types.NewTypeName(pos, pkg, name, typ))
-
- case typeTag:
- p.typ(nil, nil)
-
- case varTag:
- pos := p.pos()
- pkg, name := p.qualifiedName()
- typ := p.typ(nil, nil)
- p.declare(types.NewVar(pos, pkg, name, typ))
-
- case funcTag:
- pos := p.pos()
- pkg, name := p.qualifiedName()
- params, isddd := p.paramList()
- result, _ := p.paramList()
- sig := types.NewSignature(nil, params, result, isddd)
- p.declare(types.NewFunc(pos, pkg, name, sig))
-
- default:
- errorf("unexpected object tag %d", tag)
- }
-}
-
-const deltaNewFile = -64 // see cmd/compile/internal/gc/bexport.go
-
-func (p *importer) pos() token.Pos {
- if !p.posInfoFormat {
- return token.NoPos
- }
-
- file := p.prevFile
- line := p.prevLine
- delta := p.int()
- line += delta
- if p.version >= 5 {
- if delta == deltaNewFile {
- if n := p.int(); n >= 0 {
- // file changed
- file = p.path()
- line = n
- }
- }
- } else {
- if delta == 0 {
- if n := p.int(); n >= 0 {
- // file changed
- file = p.prevFile[:n] + p.string()
- line = p.int()
- }
- }
- }
- p.prevFile = file
- p.prevLine = line
-
- return p.fake.pos(file, line)
-}
-
-// Synthesize a token.Pos
-type fakeFileSet struct {
- fset *token.FileSet
- files map[string]*token.File
-}
-
-func (s *fakeFileSet) pos(file string, line int) token.Pos {
- // Since we don't know the set of needed file positions, we
- // reserve maxlines positions per file.
- const maxlines = 64 * 1024
- f := s.files[file]
- if f == nil {
- f = s.fset.AddFile(file, -1, maxlines)
- s.files[file] = f
- // Allocate the fake linebreak indices on first use.
- // TODO(adonovan): opt: save ~512KB using a more complex scheme?
- fakeLinesOnce.Do(func() {
- fakeLines = make([]int, maxlines)
- for i := range fakeLines {
- fakeLines[i] = i
- }
- })
- f.SetLines(fakeLines)
- }
-
- if line > maxlines {
- line = 1
- }
-
- // Treat the file as if it contained only newlines
- // and column=1: use the line number as the offset.
- return f.Pos(line - 1)
-}
-
-var (
- fakeLines []int
- fakeLinesOnce sync.Once
-)
-
-func (p *importer) qualifiedName() (pkg *types.Package, name string) {
- name = p.string()
- pkg = p.pkg()
- return
-}
-
-func (p *importer) record(t types.Type) {
- p.typList = append(p.typList, t)
-}
-
-// A dddSlice is a types.Type representing ...T parameters.
-// It only appears for parameter types and does not escape
-// the importer.
-type dddSlice struct {
- elem types.Type
-}
-
-func (t *dddSlice) Underlying() types.Type { return t }
-func (t *dddSlice) String() string { return "..." + t.elem.String() }
-
-// parent is the package which declared the type; parent == nil means
-// the package currently imported. The parent package is needed for
-// exported struct fields and interface methods which don't contain
-// explicit package information in the export data.
-//
-// A non-nil tname is used as the "owner" of the result type; i.e.,
-// the result type is the underlying type of tname. tname is used
-// to give interface methods a named receiver type where possible.
-func (p *importer) typ(parent *types.Package, tname *types.Named) types.Type {
- // if the type was seen before, i is its index (>= 0)
- i := p.tagOrIndex()
- if i >= 0 {
- return p.typList[i]
- }
-
- // otherwise, i is the type tag (< 0)
- switch i {
- case namedTag:
- // read type object
- pos := p.pos()
- parent, name := p.qualifiedName()
- scope := parent.Scope()
- obj := scope.Lookup(name)
-
- // if the object doesn't exist yet, create and insert it
- if obj == nil {
- obj = types.NewTypeName(pos, parent, name, nil)
- scope.Insert(obj)
- }
-
- if _, ok := obj.(*types.TypeName); !ok {
- errorf("pkg = %s, name = %s => %s", parent, name, obj)
- }
-
- // associate new named type with obj if it doesn't exist yet
- t0 := types.NewNamed(obj.(*types.TypeName), nil, nil)
-
- // but record the existing type, if any
- tname := obj.Type().(*types.Named) // tname is either t0 or the existing type
- p.record(tname)
-
- // read underlying type
- t0.SetUnderlying(p.typ(parent, t0))
-
- // interfaces don't have associated methods
- if types.IsInterface(t0) {
- return tname
- }
-
- // read associated methods
- for i := p.int(); i > 0; i-- {
- // TODO(gri) replace this with something closer to fieldName
- pos := p.pos()
- name := p.string()
- if !exported(name) {
- p.pkg()
- }
-
- recv, _ := p.paramList() // TODO(gri) do we need a full param list for the receiver?
- params, isddd := p.paramList()
- result, _ := p.paramList()
- p.int() // go:nointerface pragma - discarded
-
- sig := types.NewSignature(recv.At(0), params, result, isddd)
- t0.AddMethod(types.NewFunc(pos, parent, name, sig))
- }
-
- return tname
-
- case arrayTag:
- t := new(types.Array)
- if p.trackAllTypes {
- p.record(t)
- }
-
- n := p.int64()
- *t = *types.NewArray(p.typ(parent, nil), n)
- return t
-
- case sliceTag:
- t := new(types.Slice)
- if p.trackAllTypes {
- p.record(t)
- }
-
- *t = *types.NewSlice(p.typ(parent, nil))
- return t
-
- case dddTag:
- t := new(dddSlice)
- if p.trackAllTypes {
- p.record(t)
- }
-
- t.elem = p.typ(parent, nil)
- return t
-
- case structTag:
- t := new(types.Struct)
- if p.trackAllTypes {
- p.record(t)
- }
-
- *t = *types.NewStruct(p.fieldList(parent))
- return t
-
- case pointerTag:
- t := new(types.Pointer)
- if p.trackAllTypes {
- p.record(t)
- }
-
- *t = *types.NewPointer(p.typ(parent, nil))
- return t
-
- case signatureTag:
- t := new(types.Signature)
- if p.trackAllTypes {
- p.record(t)
- }
-
- params, isddd := p.paramList()
- result, _ := p.paramList()
- *t = *types.NewSignature(nil, params, result, isddd)
- return t
-
- case interfaceTag:
- // Create a dummy entry in the type list. This is safe because we
- // cannot expect the interface type to appear in a cycle, as any
- // such cycle must contain a named type which would have been
- // first defined earlier.
- // TODO(gri) Is this still true now that we have type aliases?
- // See issue #23225.
- n := len(p.typList)
- if p.trackAllTypes {
- p.record(nil)
- }
-
- var embeddeds []types.Type
- for n := p.int(); n > 0; n-- {
- p.pos()
- embeddeds = append(embeddeds, p.typ(parent, nil))
- }
-
- t := newInterface(p.methodList(parent, tname), embeddeds)
- p.interfaceList = append(p.interfaceList, t)
- if p.trackAllTypes {
- p.typList[n] = t
- }
- return t
-
- case mapTag:
- t := new(types.Map)
- if p.trackAllTypes {
- p.record(t)
- }
-
- key := p.typ(parent, nil)
- val := p.typ(parent, nil)
- *t = *types.NewMap(key, val)
- return t
-
- case chanTag:
- t := new(types.Chan)
- if p.trackAllTypes {
- p.record(t)
- }
-
- dir := chanDir(p.int())
- val := p.typ(parent, nil)
- *t = *types.NewChan(dir, val)
- return t
-
- default:
- errorf("unexpected type tag %d", i) // panics
- panic("unreachable")
- }
-}
-
-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
- }
-}
-
-func (p *importer) fieldList(parent *types.Package) (fields []*types.Var, tags []string) {
- if n := p.int(); n > 0 {
- fields = make([]*types.Var, n)
- tags = make([]string, n)
- for i := range fields {
- fields[i], tags[i] = p.field(parent)
- }
- }
- return
-}
-
-func (p *importer) field(parent *types.Package) (*types.Var, string) {
- pos := p.pos()
- pkg, name, alias := p.fieldName(parent)
- typ := p.typ(parent, nil)
- tag := p.string()
-
- anonymous := false
- if name == "" {
- // anonymous field - typ must be T or *T and T must be a type name
- switch typ := deref(typ).(type) {
- case *types.Basic: // basic types are named types
- pkg = nil // // objects defined in Universe scope have no package
- name = typ.Name()
- case *types.Named:
- name = typ.Obj().Name()
- default:
- errorf("named base type expected")
- }
- anonymous = true
- } else if alias {
- // anonymous field: we have an explicit name because it's an alias
- anonymous = true
- }
-
- return types.NewField(pos, pkg, name, typ, anonymous), tag
-}
-
-func (p *importer) methodList(parent *types.Package, baseType *types.Named) (methods []*types.Func) {
- if n := p.int(); n > 0 {
- methods = make([]*types.Func, n)
- for i := range methods {
- methods[i] = p.method(parent, baseType)
- }
- }
- return
-}
-
-func (p *importer) method(parent *types.Package, baseType *types.Named) *types.Func {
- pos := p.pos()
- pkg, name, _ := p.fieldName(parent)
- // If we don't have a baseType, use a nil receiver.
- // A receiver using the actual interface type (which
- // we don't know yet) will be filled in when we call
- // types.Interface.Complete.
- var recv *types.Var
- if baseType != nil {
- recv = types.NewVar(token.NoPos, parent, "", baseType)
- }
- params, isddd := p.paramList()
- result, _ := p.paramList()
- sig := types.NewSignature(recv, params, result, isddd)
- return types.NewFunc(pos, pkg, name, sig)
-}
-
-func (p *importer) fieldName(parent *types.Package) (pkg *types.Package, name string, alias bool) {
- name = p.string()
- pkg = parent
- if pkg == nil {
- // use the imported package instead
- pkg = p.pkgList[0]
- }
- if p.version == 0 && name == "_" {
- // version 0 didn't export a package for _ fields
- return
- }
- switch name {
- case "":
- // 1) field name matches base type name and is exported: nothing to do
- case "?":
- // 2) field name matches base type name and is not exported: need package
- name = ""
- pkg = p.pkg()
- case "@":
- // 3) field name doesn't match type name (alias)
- name = p.string()
- alias = true
- fallthrough
- default:
- if !exported(name) {
- pkg = p.pkg()
- }
- }
- return
-}
-
-func (p *importer) paramList() (*types.Tuple, bool) {
- n := p.int()
- if n == 0 {
- return nil, false
- }
- // negative length indicates unnamed parameters
- named := true
- if n < 0 {
- n = -n
- named = false
- }
- // n > 0
- params := make([]*types.Var, n)
- isddd := false
- for i := range params {
- params[i], isddd = p.param(named)
- }
- return types.NewTuple(params...), isddd
-}
-
-func (p *importer) param(named bool) (*types.Var, bool) {
- t := p.typ(nil, nil)
- td, isddd := t.(*dddSlice)
- if isddd {
- t = types.NewSlice(td.elem)
- }
-
- var pkg *types.Package
- var name string
- if named {
- name = p.string()
- if name == "" {
- errorf("expected named parameter")
- }
- if name != "_" {
- pkg = p.pkg()
- }
- if i := strings.Index(name, "·"); i > 0 {
- name = name[:i] // cut off gc-specific parameter numbering
- }
- }
-
- // read and discard compiler-specific info
- p.string()
-
- return types.NewVar(token.NoPos, pkg, name, t), isddd
-}
-
-func exported(name string) bool {
- ch, _ := utf8.DecodeRuneInString(name)
- return unicode.IsUpper(ch)
-}
-
-func (p *importer) value() constant.Value {
- switch tag := p.tagOrIndex(); tag {
- case falseTag:
- return constant.MakeBool(false)
- case trueTag:
- return constant.MakeBool(true)
- case int64Tag:
- return constant.MakeInt64(p.int64())
- case floatTag:
- return p.float()
- case complexTag:
- re := p.float()
- im := p.float()
- return constant.BinaryOp(re, token.ADD, constant.MakeImag(im))
- case stringTag:
- return constant.MakeString(p.string())
- case unknownTag:
- return constant.MakeUnknown()
- default:
- errorf("unexpected value tag %d", tag) // panics
- panic("unreachable")
- }
-}
-
-func (p *importer) float() constant.Value {
- sign := p.int()
- if sign == 0 {
- return constant.MakeInt64(0)
- }
-
- exp := p.int()
- mant := []byte(p.string()) // big endian
-
- // remove leading 0's if any
- for len(mant) > 0 && mant[0] == 0 {
- mant = mant[1:]
- }
-
- // convert to little endian
- // TODO(gri) go/constant should have a more direct conversion function
- // (e.g., once it supports a big.Float based implementation)
- for i, j := 0, len(mant)-1; i < j; i, j = i+1, j-1 {
- mant[i], mant[j] = mant[j], mant[i]
- }
-
- // adjust exponent (constant.MakeFromBytes creates an integer value,
- // but mant represents the mantissa bits such that 0.5 <= mant < 1.0)
- exp -= len(mant) << 3
- if len(mant) > 0 {
- for msd := mant[len(mant)-1]; msd&0x80 == 0; msd <<= 1 {
- exp++
- }
- }
-
- x := constant.MakeFromBytes(mant)
- switch {
- case exp < 0:
- d := constant.Shift(constant.MakeInt64(1), token.SHL, uint(-exp))
- x = constant.BinaryOp(x, token.QUO, d)
- case exp > 0:
- x = constant.Shift(x, token.SHL, uint(exp))
- }
-
- if sign < 0 {
- x = constant.UnaryOp(token.SUB, x, 0)
- }
- return x
-}
-
-// ----------------------------------------------------------------------------
-// Low-level decoders
-
-func (p *importer) tagOrIndex() int {
- if p.debugFormat {
- p.marker('t')
- }
-
- return int(p.rawInt64())
-}
-
-func (p *importer) int() int {
- x := p.int64()
- if int64(int(x)) != x {
- errorf("exported integer too large")
- }
- return int(x)
-}
-
-func (p *importer) int64() int64 {
- if p.debugFormat {
- p.marker('i')
- }
-
- return p.rawInt64()
-}
-
-func (p *importer) path() string {
- if p.debugFormat {
- p.marker('p')
- }
- // if the path was seen before, i is its index (>= 0)
- // (the empty string is at index 0)
- i := p.rawInt64()
- if i >= 0 {
- return p.pathList[i]
- }
- // otherwise, i is the negative path length (< 0)
- a := make([]string, -i)
- for n := range a {
- a[n] = p.string()
- }
- s := strings.Join(a, "/")
- p.pathList = append(p.pathList, s)
- return s
-}
-
-func (p *importer) string() string {
- if p.debugFormat {
- p.marker('s')
- }
- // if the string was seen before, i is its index (>= 0)
- // (the empty string is at index 0)
- i := p.rawInt64()
- if i >= 0 {
- return p.strList[i]
- }
- // otherwise, i is the negative string length (< 0)
- if n := int(-i); n <= cap(p.buf) {
- p.buf = p.buf[:n]
- } else {
- p.buf = make([]byte, n)
- }
- for i := range p.buf {
- p.buf[i] = p.rawByte()
- }
- s := string(p.buf)
- p.strList = append(p.strList, s)
- return s
-}
-
-func (p *importer) marker(want byte) {
- if got := p.rawByte(); got != want {
- errorf("incorrect marker: got %c; want %c (pos = %d)", got, want, p.read)
- }
-
- pos := p.read
- if n := int(p.rawInt64()); n != pos {
- errorf("incorrect position: got %d; want %d", n, pos)
- }
-}
-
-// rawInt64 should only be used by low-level decoders.
-func (p *importer) rawInt64() int64 {
- i, err := binary.ReadVarint(p)
- if err != nil {
- errorf("read error: %v", err)
- }
- return i
-}
-
-// rawStringln should only be used to read the initial version string.
-func (p *importer) rawStringln(b byte) string {
- p.buf = p.buf[:0]
- for b != '\n' {
- p.buf = append(p.buf, b)
- b = p.rawByte()
- }
- return string(p.buf)
-}
-
-// needed for binary.ReadVarint in rawInt64
-func (p *importer) ReadByte() (byte, error) {
- return p.rawByte(), nil
-}
-
-// byte is the bottleneck interface for reading p.data.
-// It unescapes '|' 'S' to '$' and '|' '|' to '|'.
-// rawByte should only be used by low-level decoders.
-func (p *importer) rawByte() byte {
- b := p.data[0]
- r := 1
- if b == '|' {
- b = p.data[1]
- r = 2
- switch b {
- case 'S':
- b = '$'
- case '|':
- // nothing to do
- default:
- errorf("unexpected escape sequence in export data")
- }
- }
- p.data = p.data[r:]
- p.read += r
- return b
-
-}
-
-// ----------------------------------------------------------------------------
-// Export format
-
-// Tags. Must be < 0.
-const (
- // Objects
- packageTag = -(iota + 1)
- constTag
- typeTag
- varTag
- funcTag
- endTag
-
- // Types
- namedTag
- arrayTag
- sliceTag
- dddTag
- structTag
- pointerTag
- signatureTag
- interfaceTag
- mapTag
- chanTag
-
- // Values
- falseTag
- trueTag
- int64Tag
- floatTag
- fractionTag // not used by gc
- complexTag
- stringTag
- nilTag // only used by gc (appears in exported inlined function bodies)
- unknownTag // not used by gc (only appears in packages with errors)
-
- // Type aliases
- aliasTag
-)
-
-var predecl []types.Type // initialized lazily
-
-func predeclared() []types.Type {
- if predecl == nil {
- // 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{},
- }
- }
- return predecl
-}
-
-type anyType struct{}
-
-func (t anyType) Underlying() types.Type { return t }
-func (t anyType) String() string { return "any" }
generated by cgit (git 2.34.1) at 2024-10-21 07:46:10 +0000