//
// The lookup function is called each time the resulting importer needs
// to resolve an import path. In this mode the importer can only be
// invoked with canonical import paths (not relative or absolute ones);
// it is assumed that the translation to canonical import paths is being
// done by the client of the importer.
//
// A lookup function must be provided for correct module-aware operation.

	return
}

// An Importer resolves import paths to Packages. The imports map records
// packages already known, indexed by package path.
// An importer must determine the canonical package path and check imports
// to see if it is already present in the map. If so, the Importer can return
// the map entry. Otherwise, the importer must load the package data for the

Christian Sigg <******@****.***> 1712417263 -0700

	if mode != 0 {
		panic("mode must be 0")
	}
	if imp.importer == nil {
		imp.importer = importer.Default().(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
}

func TestResolveIdents(t *testing.T) {
	testenv.MustHaveGoBuild(t)

		}
	}
	return false
}

// An Importer resolves import paths to package Objects.
// The imports map records the packages already imported,
// indexed by package id (canonical import path).
// An Importer must determine the canonical import path and
// check the map to see if it is already present in the imports map.
// If so, the Importer can return the map entry. Otherwise, the
// Importer should load the package data for the given path into

	t0 := time.Now()
	if _, err := importer.ImportFrom(path, srcDir, 0); err != nil {
		// don't report an error if there's no buildable Go files
		if _, nogo := err.(*build.NoGoError); !nogo {
			t.Errorf("import %q failed (%v)", path, err)
		}
		return
	}
	t.Logf("import %q: %v", path, time.Since(t0))
}

// walkDir imports the all the packages with the given path

	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
}

func TestResolveIdents(t *testing.T) {
	testenv.MustHaveGoBuild(t)

	if err != nil {
		t.Fatal(err)
	}

	conf := Config{Importer: importer.Default()}
	_, err = conf.Check("go/types", fset, 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{
		"net/http",
		"go/parser",
		"go/constant",

func New(ctxt *build.Context, fset *token.FileSet, packages map[string]*types.Package) *Importer {
	return &Importer{
		ctxt:     ctxt,
		fset:     fset,
		sizes:    types.SizesFor(ctxt.Compiler, ctxt.GOARCH), // uses go/types default if GOARCH not found
		packages: packages,
	}
}

// Importing is a sentinel taking the place in Importer.packages

	path := filepath.Join(runtime.GOROOT(), "src", "net", "http")

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

	conf := Config{
		Importer: importer.Default(),
	}

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

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