// with the positions of objects created by the importer.
func For(compiler string, lookup Lookup) types.Importer {
	return ForCompiler(token.NewFileSet(), compiler, lookup)
}

// Default returns an Importer for the compiler that built the running binary.
// If available, the result implements [types.ImporterFrom].
func Default() types.Importer {
	return For(runtime.Compiler, nil)
}

// gc importer

type gcimports struct {

	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

	}

	// Reimporting a partially imported (incomplete) package is not supported (see issue #19337).
	// Make sure we recognize the situation and report an error.

	mathPkg := types.NewPackage("math", "math") // incomplete package
	importer := New(&build.Default, token.NewFileSet(), map[string]*types.Package{mathPkg.Path(): mathPkg})
	_, err := importer.ImportFrom("math", ".", 0)

	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",

	}

	// resolve and type-check package AST
	importer := new(resolveTestImporter)
	conf := Config{Importer: importer}
	uses := make(map[*syntax.Name]Object)
	defs := make(map[*syntax.Name]Object)
	_, err := conf.Check("testResolveIdents", files, &Info{Defs: defs, Uses: uses})
	if err != nil {
		t.Fatal(err)
	}

	// check that all packages were imported
	for _, name := range pkgnames {

	"os/exec"
	"path/filepath"
	"strings"
	"sync"
	_ "unsafe" // for go:linkname
)

// An Importer provides the context for importing packages from source code.
type Importer struct {
	ctxt     *build.Context
	fset     *token.FileSet
	sizes    types.Sizes
	packages map[string]*types.Package
}

// New returns a new Importer for the given context, file set, and map

	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()