</pre>

<p>
A <a href="#Type_parameter_declarations">type parameter</a> or a <a href="#Type_declarations">generic type</a>
may be used as a type in a case. If upon <a href="#Instantiations">instantiation</a> that type turns
out to duplicate another entry in the switch, the first matching case is chosen.
</p>

<pre>
func f[P any](x any) int {
	switch x.(type) {
	case P:
		return 0
	case string:
		return 1

// A Macro represents the definition of a #defined macro.
type Macro struct {
	name   string   // The #define name.
	args   []string // Formal arguments.
	tokens []Token  // Body of macro.
}

// Tokenize turns a string into a list of Tokens; used to parse the -D flag and in tests.
func Tokenize(str string) []Token {
	t := NewTokenizer("command line", strings.NewReader(str), nil)
	var tokens []Token
	for {
		tok := t.Next()

// Copyright 2017 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.

// This file is here just to cause problems.
// main.swig turns into a file also named main.go.
// Make sure cmd/go keeps them separate
// when both are passed to cgo.

package main

//int F(void) { return 1; }
import "C"
import (
	"fmt"
	"os"
)

		// The ZIP specification (APPNOTE.TXT) specifies that directories, which
		// are technically zero-byte files, must not have any associated file
		// data. We previously tried failing here if f.CompressedSize64 != 0,
		// but it turns out that a number of implementations (namely, the Java
		// jar tool) don't properly set the storage method on directories
		// resulting in a file with compressed size > 0 but uncompressed size ==

	// Hex constant 0xFFFFFFFE00000001
	MOVD $-8589934591, R5           // 38a0ffff or 0602000038a00001

	// For #66955. Verify this opcode turns into a load and assembles.
	MOVD $-6795364578871345152, R5  // 3ca00000e8a50000 or 04100000e4a00000

	MOVD 8(R3), R4                  // e8830008
	MOVD (R3)(R4), R5               // 7ca4182a