return false
	}
	return (*Checker)(nil).implements(nopos, V, T, false, nil)
}

// Satisfies reports whether type V satisfies the constraint T.
//
// The behavior of Satisfies is unspecified if V is Typ[Invalid] or an uninstantiated
// generic type.
func Satisfies(V Type, T *Interface) bool {
	return (*Checker)(nil).implements(nopos, V, T, true, nil)
}

// Identical reports whether x and y are identical types.

package main

import (
	"go/ast"
	"go/token"
)

func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
	switch n := x.(type) {
	default:
		error_(token.NoPos, "unexpected type %T in walk", x)
		panic("unexpected type")

	case *ast.IndexListExpr:
		f.walk(&n.X, ctxExpr, visit)
		f.walk(n.Indices, ctxExpr, visit)
	}
}

	//         }
	// }
	n1 := NewTypeName(nopos, nil, "T1", nil)
	T1 := NewNamed(n1, nil, nil)
	n2 := NewTypeName(nopos, nil, "T2", nil)
	T2 := NewNamed(n2, nil, nil)
	s1 := NewStruct([]*Var{NewField(nopos, nil, "_", T2, false)}, nil)
	T1.SetUnderlying(s1)
	s2 := NewStruct([]*Var{NewField(nopos, nil, "_", T2, false)}, nil)
	s3 := NewStruct([]*Var{NewField(nopos, nil, "_", s2, false)}, nil)
	T2.SetUnderlying(s3)

			"package equivalentinterfaces; type T[P any] int",
			"T", []Type{
				NewInterfaceType([]*Func{NewFunc(nopos, nil, "M", emptySignature)}, nil),
			},
			"T", []Type{
				NewInterfaceType(
					nil,
					[]Type{
						NewInterfaceType([]*Func{NewFunc(nopos, nil, "M", emptySignature)}, nil),
					},
				),
			},
			true,
		},
		{
			// int|string is equivalent to string|int

			for i, xtparam := range xtparams {
				ybound := check.subst(nopos, ytparams[i].bound, smap, nil, ctxt)
				if !c.identical(xtparam.bound, ybound, p) {
					return false
				}
			}

			yparams = check.subst(nopos, y.params, smap, nil, ctxt).(*Tuple)
			yresults = check.subst(nopos, y.results, smap, nil, ctxt).(*Tuple)
		}

		return x.variadic == y.variadic &&

var runtimePkg = func() *types2.Package {
	var nopos syntax.Pos
	pkg := types2.NewPackage("runtime", "runtime")
	anyType := types2.Universe.Lookup("any").Type()
	intType := types2.Universe.Lookup("int").Type()

	// func deferrangefunc() unsafe.Pointer
	obj := types2.NewFunc(nopos, pkg, "deferrangefunc", types2.NewSignatureType(nil, nil, nil, nil, types2.NewTuple(types2.NewParam(nopos, pkg, "extra", anyType)), false))

	cmdlinePkgLiteral
)

// LoadPackage does Load import, but without a parent package load contezt
func LoadPackage(ctx context.Context, opts PackageOpts, path, srcDir string, stk *ImportStack, importPos []token.Position, mode int) *Package {
	p, err := loadImport(ctx, opts, nil, path, srcDir, nil, stk, importPos, mode)
	if err != nil {
		base.Fatalf("internal error: loadImport of %q with nil parent returned an error", path)
	}

		if cfg.BuildMod == "mod" && cfg.CmdName != "mod graph" && cfg.CmdName != "mod why" {
			// go line is missing from go.mod; add one there and add to derived requirements.
			v := gover.Local()
			if opts != nil && opts.TidyGoVersion != "" {
				v = opts.TidyGoVersion
			}
			addGoStmt(MainModules.ModFile(mainModule), mainModule, v)
			rs = overrideRoots(ctx, rs, []module.Version{{Path: "go", Version: v}})

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package types2

import (
	"strings"
	"testing"
)

var myInt = func() Type {
	tname := NewTypeName(nopos, nil, "myInt", nil)
	return NewNamed(tname, Typ[Int], nil)
}()

var testTerms = map[string]*term{
	"∅":       nil,
	"𝓤":       {},
	"int":     {false, Typ[Int]},
	"~int":    {true, Typ[Int]},

// loads the packages in the import graph rooted at that set.
func LoadPackages(ctx context.Context, opts PackageOpts, patterns ...string) (matches []*search.Match, loadedPackages []string) {
	if opts.Tags == nil {
		opts.Tags = imports.Tags()
	}

	patterns = search.CleanPatterns(patterns)
	matches = make([]*search.Match, 0, len(patterns))
	allPatternIsRoot := false