// easy cases
	switch {
	case x == nil || y == nil:
		return x == y
	case x.typ == nil || y.typ == nil:
		return x.typ == y.typ
	}
	// ∅ ⊂ x, y ⊂ 𝓤

	return x.tilde == y.tilde && Identical(x.typ, y.typ)
}

// union returns the union x ∪ y: zero, one, or two non-nil terms.
func (x *term) union(y *term) (_, _ *term) {
	// easy cases
	switch {
	case x == nil && y == nil:

	// easy cases
	switch {
	case x == nil || y == nil:
		return x == y
	case x.typ == nil || y.typ == nil:
		return x.typ == y.typ
	}
	// ∅ ⊂ x, y ⊂ 𝓤

	return x.tilde == y.tilde && types.Identical(x.typ, y.typ)
}

// union returns the union x ∪ y: zero, one, or two non-nil terms.
func (x *term) union(y *term) (_, _ *term) {
	// easy cases
	switch {
	case x == nil && y == nil:

// type parameter and its core type.
// If two types are not structurally equivalent, they cannot be Go
// identical types. On the other hand, if they are structurally
// equivalent, they may be Go identical or at least assignable, or
// they may be in the type set of a constraint.
// Whether they indeed are identical or assignable is determined
// upon instantiation and function argument passing.

package types

import (

	Tu := under(T)
	Vp, _ := V.(*TypeParam)
	Tp, _ := T.(*TypeParam)

	// "V and T have identical underlying types if tags are ignored
	// and V and T are not type parameters"
	if IdenticalIgnoreTags(Vu, Tu) && Vp == nil && Tp == nil {
		return true
	}

	// "V and T are unnamed pointer types and their pointer base types
	// have identical underlying types if tags are ignored
	// and their pointer base types are not type parameters"

		return ir.OXXX, ""
	}

	// 1. src type is identical to dst.
	if types.Identical(src, dst) {
		return ir.OCONVNOP, ""
	}

	// 2. src and dst have identical underlying types and
	//   a. either src or dst is not a named type, or
	//   b. both are empty interface types, or
	//   c. at least one is a gcshape type.

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

package main

import "fmt"

var x any
var y interface{}

var _ = &x == &y // assert x and y have identical types

func main() {
	fmt.Printf("%T\n%T\n", &x, &y)

  }

  /**
   * Appends the string representation of each of {@code parts}, using the previously configured
   * separator between each, to {@code builder}. Identical to {@link #appendTo(Appendable,
   * Iterable)}, except that it does not throw {@link IOException}.
   */
  @CanIgnoreReturnValue
  public final StringBuilder appendTo(

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build cgo

// Test that we can have two identical cgo packages in a single binary.
// No runtime test; just make sure it compiles.

package cgotest

import (
	_ "cmd/cgo/internal/test/issue23555a"
	_ "cmd/cgo/internal/test/issue23555b"

// type parameter and its core type.
// If two types are not structurally equivalent, they cannot be Go
// identical types. On the other hand, if they are structurally
// equivalent, they may be Go identical or at least assignable, or
// they may be in the type set of a constraint.
// Whether they indeed are identical or assignable is determined
// upon instantiation and function argument passing.

package types2

import (

Module with a function that prints file name for the top stack frame.
Different versions of this module are identical, but they should return
different file names with -trimpath.
-- .mod --
module example.com/stack

go 1.14
-- .info --
{"Version":"v1.0.0"}
-- stack.go --
package stack

import "runtime"

func TopFile() string {
	_, file, _, _ := runtime.Caller(0)
	return file