CacheProg bool

	// NewInliner enables a new+improved version of the function
	// inlining phase within the Go compiler.
	NewInliner bool

	// RangeFunc enables range over func.
	RangeFunc bool

	// AliasTypeParams enables type parameters for alias types.
	// Requires that gotypesalias=1 is set with GODEBUG.
	// This flag will be removed with Go 1.24.
	AliasTypeParams bool

//
//	fmt.Sprintf("#rv%d", i+1)`
//
// the newly named object is inserted into the signature's scope,
// and the object and new field name are returned.
//
// The intended use for RenameResult is to allow rangefunc to assign results within a closure.
// This is a hack, as narrowly targeted as possible to discourage abuse.
func (s *Signature) RenameResult(results []*syntax.Field, i int) (*Var, *syntax.Name) {
	a := results[i]

// Copyright 2024 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 goexperiment.rangefunc

package race_test

import (
	"runtime"
	"sync/atomic"
	"testing"
)

type Seq2[T1, T2 any] func(yield func(T1, T2) bool)

// ofSliceIndex returns a Seq over the elements of s. It is equivalent

	testFiles(t, []string{"p.go"}, [][]byte{[]byte(src)}, 0, false, withSizes(&StdSizes{4, 4}))
}

func TestCheck(t *testing.T) {
	old := buildcfg.Experiment.RangeFunc
	defer func() {
		buildcfg.Experiment.RangeFunc = old
	}()
	buildcfg.Experiment.RangeFunc = true

	DefPredeclaredTestFuncs()
	testDirFiles(t, "../../../../internal/types/testdata/check", 50, false) // TODO(gri) narrow column tolerance
}

// Copyright 2024 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 goexperiment.rangefunc

package main

import (
	"fmt"
	"iter"
	"runtime"
)

func init() {
	register("CoroLockOSThreadIterLock", func() {
		println("expect: OK")
		CoroLockOSThread(callerExhaust, iterLock)
	})

// Copyright 2024 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 goexperiment.rangefunc && !windows

package main

/*
#include <stdint.h> // for uintptr_t

void go_callback_coro(uintptr_t handle);

static void call_go(uintptr_t handle) {
	go_callback_coro(handle);
}
*/
import "C"

import (
	"fmt"
	"iter"

// but an atomic list hanging off:
//
//		g._defer => d4 -> d3 -> drangefunc -> d2 -> d1 -> nil
//	                             | .head
//	                             |
//	                             +--> dY -> dX -> nil
//
// with each -> indicating a d.link pointer, and where drangefunc
// has the d.rangefunc = true bit set.
// Note that the function being ranged over may have added

	testFiles(t, []string{"p.go"}, [][]byte{[]byte(src)}, false, withSizes(&StdSizes{4, 4}))
}

func TestCheck(t *testing.T) {
	old := buildcfg.Experiment.RangeFunc
	defer func() {
		buildcfg.Experiment.RangeFunc = old
	}()
	buildcfg.Experiment.RangeFunc = true

	DefPredeclaredTestFuncs()
	testDirFiles(t, "../../internal/types/testdata/check", false)
}

}

type State int

// Rewrite rewrites all the range-over-funcs in the files.
// It returns the set of function literals generated from rangefunc loop bodies.
// This allows for rangefunc loop bodies to be distingushed by debuggers.
func Rewrite(pkg *types2.Package, info *types2.Info, files []*syntax.File) map[*syntax.FuncLit]bool {
	ri := make(map[*syntax.FuncLit]bool)

		cmd = testenv.CleanCmdEnv(cmd)

		// Add the rangefunc GOEXPERIMENT unconditionally since some tests depend on it.
		// TODO(61405): Remove this once it's enabled by default.
		edited := false
		for i := range cmd.Env {
			e := cmd.Env[i]
			if _, vars, ok := strings.Cut(e, "GOEXPERIMENT="); ok {
				cmd.Env[i] = "GOEXPERIMENT=" + vars + ",rangefunc"
				edited = true
			}
		}
		if !edited {