// This file implements the (temporary) plumbing to get importing to work.

package types2_test

import (
	gcimporter "cmd/compile/internal/importer"
	"cmd/compile/internal/types2"
	"io"
)

func defaultImporter() types2.Importer {
	return &gcimports{
		packages: make(map[string]*types2.Package),
	}
}

type gcimports struct {
	packages map[string]*types2.Package
	lookup   func(path string) (io.ReadCloser, error)
}

	const src = `
package a

import "unsafe"

const _ = unsafe.Offsetof(struct{ x int64 }{}.x)
`
	info := types2.Info{Types: make(map[syntax.Expr]types2.TypeAndValue)}
	conf := types2.Config{
		Importer: defaultImporter(),
		Sizes:    &types2.StdSizes{WordSize: 8, MaxAlign: 8},
	}
	mustTypecheck(src, &conf, &info)
	for _, tv := range info.Types {
		_ = conf.Sizes.Sizeof(tv.Type)
		_ = conf.Sizes.Alignof(tv.Type)
	}
}

	testenv.MustHaveGoBuild(t) // The Go command is needed for the importer to determine the locations of stdlib .a files.

	files, err := pkgFiles(".")
	if err != nil {
		t.Fatal(err)
	}

	conf := Config{Importer: defaultImporter()}
	_, err = conf.Check("cmd/compile/internal/types2", files, nil)
	if err != nil {
		t.Fatal(err)
	}
}

func BenchmarkCheck(b *testing.B) {

	// Choose an arbitrary, large package.
	path := filepath.Join(runtime.GOROOT(), "src", "net", "http")

	files, err := pkgFiles(path)
	if err != nil {
		b.Fatal(err)
	}

	conf := Config{
		Importer: defaultImporter(),
	}

	pkg, err := conf.Check("http", files, nil)
	if err != nil {
		b.Fatal(err)
	}

	scope := pkg.Scope()
	names := scope.Names()

	src := "package x; import `unsafe`; var _ unsafe.Pointer;\n" + body

	var buf strings.Builder
	conf := types2.Config{
		Error:    func(err error) { fmt.Fprintln(&buf, err) },
		Importer: defaultImporter(),
	}
	typecheck(src, &conf, nil)
	if buf.Len() == 0 {
		return nil
	}
	return errors.New(strings.TrimRight(buf.String(), "\n"))
}

func TestMonoGood(t *testing.T) {
	for i, good := range goods {

	}

	// Type-check a package consisting of these files.
	// Type information for the imported "fmt" package
	// comes from $GOROOT/pkg/$GOOS_$GOOARCH/fmt.a.
	conf := types2.Config{Importer: defaultImporter()}
	pkg, err := conf.Check("temperature", files, nil)
	if err != nil {
		log.Fatal(err)
	}

	// Print the tree of scopes.
	// For determinism, we redact addresses.
	var buf strings.Builder

}

func (imp *resolveTestImporter) ImportFrom(path, srcDir string, mode ImportMode) (*Package, error) {
	if mode != 0 {
		panic("mode must be 0")
	}
	if imp.importer == nil {
		imp.importer = defaultImporter().(ImporterFrom)
		imp.imported = make(map[string]bool)
	}
	pkg, err := imp.importer.ImportFrom(path, srcDir, mode)
	if err != nil {
		return nil, err
	}
	imp.imported[path] = true
	return pkg, nil
}

	testenv.MustHaveGoBuild(t)

	for i, test := range testObjects {
		t.Run(fmt.Sprint(i), func(t *testing.T) {
			src := "package p; " + test.src
			conf := Config{Error: func(error) {}, Importer: defaultImporter(), EnableAlias: test.alias}
			pkg, err := typecheck(src, &conf, nil)
			if err != nil {
				t.Fatalf("%s: %s", src, err)
			}

			names := strings.Split(test.obj, ".")

		`struct { *Missing }`,
		`struct { unsafe.Pointer }`,
		`struct { P }`,
		`struct { *I }`,
		`struct { a int; b Missing; *Missing }`,
	} {
		f := mustParse(prefix + src)

		conf := Config{Importer: defaultImporter(), Error: func(err error) {}}
		info := &Info{Types: make(map[syntax.Expr]TypeAndValue)}
		_, err := conf.Check(f.PkgName.Value, []*syntax.File{f}, info)
		if err != nil {
			if _, ok := err.(Error); !ok {

	"errors"
	"fmt"
	"go/build"
	"internal/testenv"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"sync"
	"testing"
	"time"

	. "cmd/compile/internal/types2"
)

var stdLibImporter = defaultImporter()

func TestStdlib(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping in short mode")
	}

	testenv.MustHaveGoBuild(t)

	// Collect non-test files.
	dirFiles := make(map[string][]string)