imports[path] = pkg
	}
	return pkg, nil
}

// lookupSym reports whether the package has a given symbol or method.
//
// If recv == "", HasSym reports whether the package has a top-level
// const, func, type, or var named name.
//
// If recv != "", HasSym reports whether the package has a type
// named recv with a method named name.
func (p *Package) lookupSym(recv, name string) bool {
	if recv != "" {

	d := &parseDoc{
		Parser:    p,
		Doc:       new(Doc),
		links:     make(map[string]*LinkDef),
		lines:     lines,
		lookupSym: func(recv, name string) bool { return false },
	}
	if p.LookupSym != nil {
		d.lookupSym = p.LookupSym
	}

	// First pass: break into block structure and collect known links.
	// The text is all recorded as Plain for now.
	var prev span

	}
	p.LookupPackage = func(name string) (importPath string, ok bool) {
		if name == "comment" {
			return "go/doc/comment", true
		}
		return DefaultLookupPackage(name)
	}
	p.LookupSym = func(recv, name string) (ok bool) {
		if recv == "Parser" && name == "Parse" ||
			recv == "" && name == "Doc" ||
			recv == "" && name == "NoURL" {
			return true
		}
		return false
	}

		pc := f.LineTable.LineToPC(abs, f.End)
		if pc != 0 {
			return pc, f, nil
		}
	}
	return 0, nil, &UnknownLineError{file, line}
}

// LookupSym returns the text, data, or bss symbol with the given name,
// or nil if no such symbol is found.
func (t *Table) LookupSym(name string) *Sym {
	// TODO(austin) Maybe make a map
	for i := range t.Syms {
		s := &t.Syms[i]
		switch s.Type {

pkg go/doc/comment, type Parser struct #51082
pkg go/doc/comment, type Parser struct, LookupPackage func(string) (string, bool) #51082
pkg go/doc/comment, type Parser struct, LookupSym func(string, string) bool #51082
pkg go/doc/comment, type Parser struct, Words map[string]string #51082
pkg go/doc/comment, type Plain string #51082
pkg go/doc/comment, type Printer struct #51082

		pkg = nopkg
	}
	if s := pkg.Syms[string(name)]; s != nil {
		return s
	}
	str := InternString(name)
	return pkg.Lookup(str)
}

// LookupNum looks up the symbol starting with prefix and ending with
// the decimal n. If prefix is too long, LookupNum panics.
func (pkg *Pkg) LookupNum(prefix string, n int) *Sym {
	var buf [20]byte // plenty long enough for all current users
	copy(buf[:], prefix)

		base.Fatalf("autolabel prefix must start with '.', have %q", prefix)
	}
	fn := ir.CurFunc
	if ir.CurFunc == nil {
		base.Fatalf("autolabel outside function")
	}
	n := fn.Label
	fn.Label++
	return LookupNum(prefix, int(n))
}

func Lookup(name string) *types.Sym {
	return types.LocalPkg.Lookup(name)
}

// InitRuntime loads the definitions for the low-level runtime functions,

)

func AssignConv(n ir.Node, t *types.Type, context string) ir.Node {
	return assignconvfn(n, t, func() string { return context })
}

// LookupNum returns types.LocalPkg.LookupNum(prefix, n).
func LookupNum(prefix string, n int) *types.Sym {
	return types.LocalPkg.LookupNum(prefix, n)
}

// Given funarg struct list, return list of fn args.
func NewFuncParams(origs []*types.Field) []*types.Field {

		{"(*Sym).PackageName", Method, 0},
		{"(*Sym).ReceiverName", Method, 0},
		{"(*Sym).Static", Method, 0},
		{"(*Table).LineToPC", Method, 0},
		{"(*Table).LookupFunc", Method, 0},
		{"(*Table).LookupSym", Method, 0},
		{"(*Table).PCToFunc", Method, 0},
		{"(*Table).PCToLine", Method, 0},
		{"(*Table).SymByAddr", Method, 0},
		{"(*UnknownLineError).Error", Method, 0},
		{"(Func).BaseName", Method, 0},

// To make it unique within a package and also uncallable,
// the name, normally "pkg.init", is altered to "pkg.init.0".
var renameinitgen int

func Renameinit() *types.Sym {
	s := typecheck.LookupNum("init.", renameinitgen)
	renameinitgen++
	return s
}

func checkEmbed(decl *syntax.VarDecl, haveEmbed, withinFunc bool) error {
	switch {
	case !haveEmbed: