const a = 1e+500000000
const b = a * a // ERROR "constant multiplication overflow|not representable"
const c = b * b

const MaxInt512 = (1<<256 - 1) * (1<<256 + 1)
const _ = MaxInt512 + 1  // ERROR "constant addition overflow"
const _ = MaxInt512 ^ -1 // ERROR "constant bitwise XOR overflow"

	f(Bool)             // ERROR "convert|wrong type|cannot|incompatible"
}

const ptr = nil // ERROR "const.*nil|not constant"
const _ = string([]byte(nil)) // ERROR "is not a? ?constant"
const _ = uintptr(unsafe.Pointer((*int)(nil))) // ERROR "is not a? ?constant"
const _ = unsafe.Pointer((*int)(nil)) // ERROR "cannot be nil|invalid constant type|is not a constant|not constant"

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

// constant conversions

package const1

import "math"

const(
	mi = ^int(0)
	mu = ^uint(0)
	mp = ^uintptr(0)

	logSizeofInt     = uint(mi>>8&1 + mi>>16&1 + mi>>32&1)
	logSizeofUint    = uint(mu>>8&1 + mu>>16&1 + mu>>32&1)
	logSizeofUintptr = uint(mp>>8&1 + mp>>16&1 + mp>>32&1)
)

const (
	minInt8 = -1<<(8<<iota - 1)
	minInt16
	minInt32
	minInt64

const StackGuardMultiplier = 1 + goos.IsAix + isRace

// DefaultPhysPageSize is the default physical page size.
const DefaultPhysPageSize = goarch.DefaultPhysPageSize

// PCQuantum is the minimal unit for a program counter (1 on x86, 4 on most other systems).
// The various PC tables record PC deltas pre-divided by PCQuantum.
const PCQuantum = goarch.PCQuantum

package main

import "fmt"

type T int

func (t T) String() string { return fmt.Sprintf("T%d", int(t)) }

const (
	A T = 1 << (1 << iota)
	B
	C
	D
	E
)

func main() {
	s := fmt.Sprintf("%v %v %v %v %v", A, B, C, D, E)
	if s != "T2 T4 T16 T256 T65536" {
		println("type info didn't propagate in const: got", s)
		panic("fail")
	}
	x := uint(5)
	y := float64(uint64(1)<<x)	// used to fail to compile

package p

var b struct {
	a[10]int
}

var m map[string][20]int

var s [][30]int

func f() *[40]int
var c chan *[50]int
var z complex128

const (
	n1 = len(b.a)
	n2 = len(m[""])
	n3 = len(s[10])

	n4 = len(f())  // ERROR "is not a constant|is not constant"
	n5 = len(<-c) // ERROR "is not a constant|is not constant"

    // CHECK: %[[CONST2:.*]] = "tf.Const"() <{value = dense<
    // CHECK-SAME: [8, 8, 3, 64]
    // CHECK: %[[RESHAPE1:.*]] = "tf.Reshape"(%[[TRANSPOSE1:.*]], %[[CONST2:.*]]) : (tensor<4x2x4x2x3x64xf32>, tensor<4xi64>) -> tensor<8x8x3x64xf32>
    // CHECK: %[[CONST3:.*]] = "tf.Const"() <{value = dense<
    // CHECK-SAME: [7, 7, 3, 64]

		return
	}

	dir, err := ioutil.TempDir("", "const7_")
	if err != nil {
		log.Fatalf("creating temp dir: %v\n", err)
	}
	defer os.RemoveAll(dir)

	const bitLimit = 512
	const charLimit = 10000 // compiler-internal constant length limit
	testProg(dir, "x1", bitLimit, "")
	testProg(dir, "x2", bitLimit+1, "constant overflow")

package main

import "os"

const (
	c0      = 0
	cm1     = -1
	chuge   = 1 << 100
	chuge_1 = chuge - 1
	c1      = chuge >> 100
	c3div2  = 3 / 2
	c1e3    = 1e3

	rsh1 = 1e100 >> 1000
	rsh2 = 1e302 >> 1000

	ctrue  = true
	cfalse = !ctrue

	// Issue #34563
	_ = string(int(123))
	_ = string(rune(456))
)

const (
	f0              = 0.0
	fm1             = -1.

// CHECK: name: "const2"
// CHECK-NEXT: op: "Const"
// CHECK: dtype: DT_HALF
// CHECK: half_val: 15360
// CHECK-NEXT: half_val: 16384
    %2:2 = tf_executor.island wraps "tf.Const"() {device = "", dtype = bf16, value = dense<[4.900000e+01, 8.200000e+02]> : tensor<2xbf16>} : () -> tensor<bf16> loc("const3")
// CHECK: name: "const3"
// CHECK-NEXT: op: "Const"
// CHECK: dtype: DT_BFLOAT16
// CHECK: half_val: 16964