/*
Parenthesized type switch expressions originally
accepted by gofmt must continue to be rewritten
into the correct unparenthesized form.

Only type-switches that didn't declare a variable
in the type switch type assertion and which
contained only "expression-like" (named) types in their
cases were permitted to have their type assertion parenthesized
by go/parser (due to a weak predicate in the parser). All others

/*
Parenthesized type switch expressions originally
accepted by gofmt must continue to be rewritten
into the correct unparenthesized form.

Only type-switches that didn't declare a variable
in the type switch type assertion and which
contained only "expression-like" (named) types in their
cases were permitted to have their type assertion parenthesized
by go/parser (due to a weak predicate in the parser). All others

// Otherwise Switch prints all the errors using base.Error.
//
// See https://go.dev/doc/toolchain#switch.
type Switcher struct {
	TooNew *gover.TooNewError // max go requirement observed
	Errors []error            // errors collected so far
}

// Error reports the error to the Switcher,
// which saves it for processing during Switch.
func (s *Switcher) Error(err error) {

func main() {
	// Test that inlined type switches without short variable
	// declarations work correctly.
	check(0, a.F(nil)) // ERROR "inlining call to a.F"
	check(1, a.F(0))   // ERROR "inlining call to a.F" "does not escape"
	check(2, a.F(0.0)) // ERROR "inlining call to a.F" "does not escape"
	check(3, a.F(""))  // ERROR "inlining call to a.F" "does not escape"

	// Test that inlined type switches with short variable

	mcall(coroswitch_m)
}

//go:linkname coroswitch

// coroswitch switches to the goroutine blocked on c
// and then blocks the current goroutine on c.
func coroswitch(c *coro) {
	gp := getg()
	gp.coroarg = c
	mcall(coroswitch_m)
}

// coroswitch_m is the implementation of coroswitch
// that runs on the m stack.
//
// Note: Coroutine switches are expected to happen at
// an order of magnitude (or more) higher frequency

2020-06-29T23:37:27.336155Z	info	Channel switches to new LB policy "pick_first"
2020-06-29T23:37:27.336189Z	info	Subchannel Connectivity change to CONNECTING
2020-06-29T23:37:27.336222Z	info	Starting gateway SDS
2020-06-29T23:37:27.336491Z	info	pickfirstBalancer: HandleSubConnStateChange: 0xc00087d1e0, {CONNECTING <nil>}
2020-06-29T23:37:27.336645Z	info	Channel Connectivity change to CONNECTING

// errorcheck

// Copyright 2009 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.

// Verify that various erroneous type switches are caught by the compiler.
// Does not compile.

package main

import "io"

func whatis(x interface{}) string {
	switch x.(type) {
	case int:
		return "int"
	case int: // ERROR "duplicate"
		return "int8"

// errorcheck

// Copyright 2019 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.

// Verify that various erroneous type switches are caught by the compiler.
// Does not compile.

package main

func notused(x interface{}) {
	// The first t is in a different scope than the 2nd t; it cannot
	// be accessed (=> declared and not used error); but it is legal

2020-06-29T23:37:27.336149Z	info	ClientConn switching balancer to "pick_first"
2020-06-29T23:37:27.336155Z	info	Channel switches to new LB policy "pick_first"
2020-06-29T23:37:27.336189Z	info	Subchannel Connectivity change to CONNECTING
2020-06-29T23:37:27.336222Z	info	Starting gateway SDS

		return "C"
	// amd64: `CMPL\s\(.*\), \$1718907950$`
	// arm64: `MOVD\s\$1718907950`, `CMPW\sR.*, R.*$`
	case ".ttf":
		return "D"
	default:
		return ""
	}
}

// use jump tables for type switches to concrete types.
func typeSwitch(x any) int {
	// amd64:`JMP\s\(.*\)\(.*\)$`
	// arm64:`MOVD\s\(R.*\)\(R.*<<3\)`,`JMP\s\(R.*\)$`
	switch x.(type) {
	case int:
		return 0
	case int8:
		return 1