}
}

func TestIssue16902(t *testing.T) {
	const src = `
package a

import "unsafe"

const _ = unsafe.Offsetof(struct{ x int64 }{}.x)
`
	info := types.Info{Types: make(map[ast.Expr]types.TypeAndValue)}
	conf := types.Config{
		Importer: importer.Default(),
		Sizes:    &types.StdSizes{WordSize: 8, MaxAlign: 8},
	}
	mustTypecheck(src, &conf, &info)

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

	for _, p := range []string{
		filepath.Join("src", "net", "http"),

// license that can be found in the LICENSE file.

// 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

package types_test

import (
	"errors"
	"fmt"
	"go/ast"
	"go/build"
	"go/importer"
	"go/parser"
	"go/scanner"
	"go/token"
	"internal/testenv"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"sync"
	"testing"
	"time"

	. "go/types"
)

// The cmd/*/internal packages may have been deleted as part of a binary
// release. Import from source instead.
//

  explicit TacModule(const Options& options) : options_(options) {}

  void SetImporter(std::unique_ptr<TacImporter> importer) {
    importer_ = std::move(importer);
  }

  void SetExporter(std::unique_ptr<TacExporter> exporter) {
    exporter_ = std::move(exporter);
  }

  // Returns pointer to the TargetHardware that is identified by 'hardware_name'
  // Returns NULL If no hardware with this name found.

package errors_test

import (
	"fmt"
	"go/ast"
	"go/constant"
	"go/importer"
	"go/parser"
	"go/token"
	"internal/testenv"
	"reflect"
	"strings"
	"testing"

	. "go/types"
)

func TestErrorCodeExamples(t *testing.T) {
	testenv.MustHaveGoBuild(t) // go command needed to resolve std .a files for importer.Default().

	// error found.
	Error func(err error)

	// An importer is used to import packages referred to from
	// import declarations.
	// If the installed importer implements ImporterFrom, the type
	// checker calls ImportFrom instead of Import.
	// The type checker reports an error if an importer is needed
	// but none was installed.
	Importer Importer

	// If Sizes != nil, it provides the sizing functions for package unsafe.

	fset := token.NewFileSet()
	file, err := parser.ParseFile(fset, "codes.go", nil, parser.ParseComments)
	if err != nil {
		log.Fatalf("ParseFile failed: %s", err)
	}
	conf := Config{Importer: importer.Default()}
	info := &Info{
		Types: make(map[ast.Expr]TypeAndValue),
		Defs:  make(map[*ast.Ident]Object),
		Uses:  make(map[*ast.Ident]Object),
	}
	_, err = conf.Check("types", fset, []*ast.File{file}, info)

	}
}

func TestIssue16902(t *testing.T) {
	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)

to the same package.

Imports are processed by importing directly from the source of
imported packages (default), or by importing from compiled and
installed packages (by setting -c to the respective compiler).

The -c flag must be set to a compiler ("gc", "gccgo") when type-
checking packages containing imports with relative import paths
(import "./mypkg") because the source importer cannot know which