embedPos := make(map[string][]token.Position)
	testEmbedPos := make(map[string][]token.Position)
	xTestEmbedPos := make(map[string][]token.Position)
	importPos := make(map[string][]token.Position)
	testImportPos := make(map[string][]token.Position)
	xTestImportPos := make(map[string][]token.Position)
	allTags := make(map[string]bool)
	for _, tf := range rp.sourceFiles {
		name := tf.name()

	// }
	import "C"
	import "unsafe"

	func main() {
		cs := C.CString("Hello from stdio")
		C.myprint(cs)
		C.free(unsafe.Pointer(cs))
	}

A few special functions convert between Go and C types
by making copies of the data. In pseudo-Go definitions:

	// Go string to C string
	// The C string is allocated in the C heap using malloc.
	// It is the caller's responsibility to arrange for it to be

}

var re = lazyregexp.New

var vcsCmds = map[string]*vcsCmd{
	"hg": {
		vcs: "hg",
		init: func(remote string) []string {
			return []string{"hg", "clone", "-U", "--", remote, "."}
		},
		tags: func(remote string) []string {
			return []string{"hg", "tags", "-q"}
		},
		tagRE: re(`(?m)^[^\n]+$`),
		branches: func(remote string) []string {

func (check *Checker) dump(format string, args ...any) {
	fmt.Println(sprintf(check.qualifier, true, format, args...))
}

func (check *Checker) qualifier(pkg *Package) string {
	// Qualify the package unless it's the package being type-checked.
	if pkg != check.pkg {
		if check.pkgPathMap == nil {
			check.pkgPathMap = make(map[string]map[string]bool)
			check.seenPkgMap = make(map[*Package]bool)
			check.markImports(check.pkg)

// and the fields are documented in the help text in ../list/list.go

type ModulePublic struct {
	Path       string           `json:",omitempty"` // module path
	Version    string           `json:",omitempty"` // module version
	Query      string           `json:",omitempty"` // version query corresponding to this version
	Versions   []string         `json:",omitempty"` // available module versions

func isFloat(t Type) bool          { return isBasic(t, IsFloat) }
func isComplex(t Type) bool        { return isBasic(t, IsComplex) }
func isNumeric(t Type) bool        { return isBasic(t, IsNumeric) }
func isString(t Type) bool         { return isBasic(t, IsString) }
func isIntegerOrFloat(t Type) bool { return isBasic(t, IsInteger|IsFloat) }
func isConstType(t Type) bool      { return isBasic(t, IsConstType) }

//         path = A[A[string]]->B[P]->A[string]->B[P]
//   P₁
//         nest = A[string]
//         path = A[A[string]]->B[P]->A[string]->B[P]
//   string
//         nest =
//         path = A[A[string]]->B[P]->A[string]->B[P]
//

	{faces, "☹", -1, []string{"☺☻", ""}},
	{faces, "~", -1, []string{faces}},
	{faces, "", -1, []string{"☺", "☻", "☹"}},
	{"1 2 3 4", " ", 3, []string{"1", "2", "3 4"}},
	{"1 2", " ", 3, []string{"1", "2"}},
	{"123", "", 2, []string{"1", "23"}},
	{"123", "", 17, []string{"1", "2", "3"}},
	{"bT", "T", math.MaxInt / 4, []string{"b", ""}},
	{"\xff-\xff", "", -1, []string{"\xff", "-", "\xff"}},
	{"\xff-\xff", "-", -1, []string{"\xff", "\xff"}},
}

	type GoWork struct {
		Go        string
		Toolchain string
		Godebug   []Godebug
		Use       []Use
		Replace   []Replace
	}

	type Godebug struct {
		Key   string
		Value string
	}

	type Use struct {
		DiskPath   string
		ModulePath string
	}

	type Replace struct {
		Old Module
		New Module
	}

	type Module struct {
		Path    string
		Version string
	}

	}
}

func runEnvW(args []string) {
	// Process and sanity-check command line.
	if len(args) == 0 {
		base.Fatalf("go: no KEY=VALUE arguments given")
	}
	osEnv := make(map[string]string)
	for _, e := range cfg.OrigEnv {
		if i := strings.Index(e, "="); i >= 0 {
			osEnv[e[:i]] = e[i+1:]
		}
	}
	add := make(map[string]string)
	for _, arg := range args {