// license that can be found in the LICENSE file.

// Test defer.

package main

import "fmt"

var result string

func addInt(i int) { result += fmt.Sprint(i) }

func test1helper() {
	for i := 0; i < 10; i++ {
		defer addInt(i)
	}
}

func test1() {
	result = ""
	test1helper()
	if result != "9876543210" {
		fmt.Printf("test1: bad defer result (should be 9876543210): %q\n", result)
		panic("defer")

		defer step(t, &steps, 9)
		step(t, &steps, 8)
	}()
	func() {
		defer step(t, &steps, 13)
		defer step(t, &steps, 12)
		func() {
			defer step(t, &steps, 11)
			panic(4)
		}()

		// Code below isn't executed,
		// but removing it breaks the test case.
		defer func() {}()
		defer panic(-1)
		defer step(t, &steps, -1)
		defer step(t, &steps, -1)
		defer func() {}()
	}()

}

func f2() {
	for {
		defer func() { // ERROR "heap-allocated defer"
			fmt.Println("defer1")
		}()
		if glob > 2 {
			break
		}
	}
	defer func() { // ERROR "stack-allocated defer"
		fmt.Println("defer2")
	}()
}

func f3() {
	defer func() { // ERROR "stack-allocated defer"
		fmt.Println("defer2")
	}()
	for {
		defer func() { // ERROR "heap-allocated defer"
			fmt.Println("defer1")
		}()

	defer complex(1, 2) // ERROR "defer discards result of complex|is not used"
	defer complex(f, 1) // ERROR "defer discards result of complex|is not used"
	defer imag(1i) // ERROR "defer discards result of imag|is not used"
	defer imag(c) // ERROR "defer discards result of imag|is not used"
	defer len(x) // ERROR "defer discards result of len|is not used"

	for i := 0; i < 2; i++ {
		defer func() {
		}()
	}
	// 1. defer a function that recovers
	// 2. defer a function that panics
	// 3. call goexit
	// Goexit runs the #2 defer. Its panic
	// is caught by the #1 defer.  For Goexit, we explicitly
	// resume execution in the Goexit loop, instead of resuming
	// execution in the caller (which would make the Goexit disappear!)
	defer func() {
		r := recover()

	defer mustNotRecover()
	defer func() {
		recover()
		defer mustRecover(3)
		panic(3)
	}()
	panic(2)
}

func test4() {
	// Single panic.
	defer mustNotRecover()
	defer func() {
		recover()
	}()
	panic(4)
}

func test5() {
	// Single panic but recover called via defer
	defer mustNotRecover()
	defer func() {
		defer recover()
	}()
	panic(5)
}

	cm.Lock()
	defer cm.Unlock()
	cm.CalledFunctions = append(cm.CalledFunctions, "QOSContainersInfo")
	return QOSContainersInfo{}
}

func (cm *FakeContainerManager) UpdateQOSCgroups() error {
	cm.Lock()
	defer cm.Unlock()
	cm.CalledFunctions = append(cm.CalledFunctions, "UpdateQOSCgroups")
	return nil
}

func (cm *FakeContainerManager) Status() Status {
	cm.Lock()
	defer cm.Unlock()

}

func test3() {
	defer mustNotRecover()
	defer func() {
		recover() // should squelch
	}()
	panic(3)
}

func test4() {
	// Equivalent to test3 but using defer to make the call.
	defer mustNotRecover()
	defer func() {
		defer recover() // should squelch
	}()
	panic(4)
}

// Check that closures can set output arguments.
// Run g().  If it panics, return x; else return deflt.

	defer unsafe.Alignof(a)		// ERROR "not used|discards result"
	defer unsafe.Offsetof(s.f)	// ERROR "not used|discards result"
	defer unsafe.Sizeof(a)		// ERROR "not used|discards result"

	defer close(c)
	defer copy(a, a)
	defer delete(m, 0)
	defer panic(0)
	defer print("foo")
	defer println("bar")
	defer recover()

package p

func f(...*int) {}

func g() {
	defer f()
	defer f(new(int))           // ERROR "... argument does not escape$" "new\(int\) does not escape$"
	defer f(new(int), new(int)) // ERROR "... argument does not escape$" "new\(int\) does not escape$"

	defer f(nil...)
	defer f([]*int{}...)                   // ERROR "\[\]\*int{} does not escape$"